RT6310 RICHTEK | Alldatasheet
Document overview
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Technical content
Features
⚫ Input Voltage Range RT6310A/B/D and RT6310AH/BH/DH : 4.5V to 23V RT6310C/CH : 5.2V to 23V ⚫ Output Voltage RT6310A/AH and RT6310D/DH : 0.6V to 5.5V RT6310B/BH : 3.3V RT6310C/CH : 5.1V ⚫ 10A Continuous Output Current ⚫ Stable with POSCAP and MLCC Capacitor ⚫ Fast Transient Response ⚫ Diode Emulation Mode (DEM) for Power Saving ⚫ Ultrasonic Mode (USM) for Avoiding Acoustic Noise ⚫ Pseudo Constant Switching Frequency 500kHz in CCM ⚫ Internal Power MOSFET Switch 17m (high-side) and 7.5m (low-side) ⚫ LDO RT6310B/BH : 3.3V/100mA RT6310C/CH : 5V/100mA ⚫ Over-Current Limit RT6310A/AH : Adjustable (13A, 15A or 17A) RT6310D/DH : Adjustable (6.5A, 16A or 25.8A) RT6310B/BH/C/CH : 15A ⚫ Output Under-/Over-Voltage Protection (UVP/OVP) RT6310A/B/C/D : Latched Mode UVP/OVP RT6310AH/BH/CH/DH : Hiccup Mode UVP and Non-Latched Mode OVP ⚫ Input Under-Voltage-Lockout (UVLO) ⚫ Over-Temperature Protection (OTP) RT6310A/B/C/D : Latched Mode OTP RT6310AH/BH/CH/DH : Non-Latched Mode OTP
Applications
⚫ Laptop Computers ⚫ Tablet PCs ⚫ Networking Systems ⚫ Servers ⚫ Personal Video Recorders ⚫ Flat Panel Television and Monitors ⚫ Distributed Power Systems
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Simplified Application Circuit FBILMT VCC_EXT VIN EN/MODE LX VOUT VIN L CIN RT6310A/AH RT6310D/DH COUT CFF PGOOD BOOT AGND PGND VCCVCC CVCC VILMT VEN/MODE VCC_EXT REXT CEXT CBOOT RBOOT VPGOOD FF* EN/MODE VCC_EXT* VIN LX VOUT VIN L CIN RT6310B/BH RT6310C/CH COUTCFF PGOOD BOOT AGND PGND VCCVCC CVCC VEN/MODE VCC_EXT REXT CEXT CBOOT RBOOT VPGOOD CLDO3/5 VLDO3/5 LDO3/5* VOUT RT6310B/BH RT6310C/CH LDO3/5*(Pin 23) ✓ (LDO3) ✓ (LDO5) VCC_EXT*(Pin 21) ✓ N/A FF*(Pin 21) N/A ✓
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com
Ordering Information
QUF: UQFN-23L 3x3 (FC) (U -Type) RT6310 Lead Plating System G: Richtek Green Policy Compliant Output Voltage & Protection Option & Mode Option A: Adjustable & Latched Mode & USM or DEM (1) (3) B: 3.3V & Latched Mode & USM or DEM (1) C: 5.1V & Latched Mode & USM or DEM (1) D: Adjustable & Latched Mode & DEM (1) (4) AH: Adjustable & Hiccup Mode & USM or DEM (2) (3) BH: 3.3V & Hiccup Mode & USM or DEM (2) CH: 5.1V& Hiccup Mode & USM or DEM (2) DH: Adjustable & Hiccup Mode & DEM (2) (4) Note: Richtek products are Richtek Green Policy compliant and compatible with the current requirements of IPC/JEDEC J -STD -020. (1) : Latched mode for UVP , OVP and OTP (2) : Hiccup mode for UVP & Non-latched mode for OVP and OTP (3) : Adjustable (13A, 15A or 17A) (4) : Adjustable (6.5A, 16A or 25.8A) Marking Information S4= : Product Code YMDNN : Date Code RT6310AGQUF S4=YM DNN TH= : Product Code YMDNN : Date Code RT6310AHGQUF TH=YM DNN S3= : Product Code YMDNN : Date Code RT6310BGQUF S3=YM DNN SL= : Product Code YMDNN : Date Code RT6310BHGQUF SL=YM DNN S2= : Product Code YMDNN : Date Code RT6310CGQUF S2=YM DNN SH= : Product Code YMDNN : Date Code RT6310CHGQUF SH=YM DNN U4= : Product Code YMDNN : Date Code RT6310DGQUF U4=YM DNN U3= : Product Code YMDNN : Date Code RT6310DHGQUF U3=YM DNN Pin Configuration (TOP VIEW) RT6310A/AH RT6310D/DH BOOT LX 6 111098 5 13 181920212223 LX PGND PGND PGND PGND PGND PGND PGND PGND PGND EN/MODE VIN VIN PGND PGND ILMT VCC_EXT FB VCC AGND PGOOD RT6310B/BH BOOT LX 6 111098 5 13 181920212223 LX PGND PGND PGND PGND PGND PGND PGND PGND PGND EN/MODE VIN VIN PGND PGND LDO3 VOUT VCC_EXT VCC AGND PGOOD RT6310C/CH BOOT LX 6 111098 5 13 181920212223 LX PGND PGND PGND PGND PGND PGND PGND PGND PGND EN/MODE VIN VIN PGND PGND LDO5 VOUT FF VCC AGND PGOOD UQFN-23L 3x3 (FC)
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Functional Pin Description Pin No. Pin Name Pin Function
1 BOOT
Bootstrap supply for high -side gate driver. Connect a high quality and low ESR ceramic capacitor (minimum C = 0.1F/0603) from BOOT pin to LX pin through a short and low inductance paths. During the period of low -side MOSFET turn -on, the bootstrap capacitor is charged by BOOT pin to store required energy for high- side gate driver. A bootstrap resistor (0603 size, 10) in series with the bootstrap capacitor is strongly recommended for reducing the voltage spike at LX node. 2, 3 LX Switch node of the buck converter is internally connected to the source terminal of the high-side MOSFET and the drain terminal of the low -side MOSFET. LX is also used for the internal ramp generation, on -time generation and current detection. Connect this pin to output inductor and keep the sensitive trace and signals away. 4 to 14 PGND Ground return from low-side power MOSFET and its driver. Directly soldering to a large PCB PGND plane and connecting thermal vias under PGND pin are required to minimize the parasitic impedance and thermal resistance. 15, 16 VIN Input voltage pin. VIN pin is used to supply the internal bias voltage, VCC and LDO. Use wide PCB traces and multiple vias to make the connection. Apply at least two layers for the input trace. Connecting the ceramic capacitor (C = 10 F/0805x2 + 0.1F/0603x1) as close as possible from VIN pin to PGND pin is necessary. EN/MODE (RT6310A/AH) (RT6310B/BH) (RT6310C/CH) Enable and operation mode control input. In order to ensure the IC logic status of turn-on/off, the low logic time length of EN/MODE control signal must be larger than 0.5s. DO NOT leave this pin floating. RT6310 supports either in diode emulation mode (DEM) or ultrasonic mode (USM) at light load (Table 1) through setting the voltage of the EN/MODE pin. Regarding the EN/MODE control logic of RT6310, please refer to Table 2. EN/MODE (RT6310D/DH) Enable input. In order to ensure the IC logic status of turn-on/off, the low logic time length of EN/MODE control signal must be larger than 0.5 s. DO NOT leave this pin floating.
18 PGOOD
Power good indicator is an open-drain output. This pin is pulled low as UVP , OVP , OTP , EN/MODE low or output voltage is not regulated (such as before soft -start). An external pull -up resistor to VCC or other external rail is required, and the recommended pull-up resistor ranges from 10k to 100k. Do not pull the PGOOD voltage higher than 6V. 19 AGND Ground of internal analog circuitry. AGND must be connected to the PGND plane through a single point.
20 VCC
Internal LDO output. Used as supply to internal control circuits. DO NOT connect to any external loads. Connect a high -quality capacitor ( C = 1F/0603) from this pin to AGND. When the voltage on VCC_EXT (RT6310A/AH/B/BH/D/DH) or VOUT (RT6310C/CH) pin is higher than "VCC bypass switch turn -on voltage", the VCC will be internally switchover to VCC_EXT (or VOUT) to reduce power consumption (refer to Figure 4 and Figure 5).
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Pin No. Pin Name Pin Function FB (RT6310A/AH) (RT6310D/DH) Feedback voltage input. A resistor divider from V OUT to FB sets the desired V OUT level. VOUT is regulated by FB tracking internal reference voltage 0.6V. Further, FB is used to detect output voltage status for OVP , UVP or PGOOD. If FB voltage is below 60% of internal reference 0.6V, the UVP is triggered. If FB voltage is greater than 120% of inte rnal reference 0.6V, the OVP is triggered. After soft -start is completed, if FB voltage is greater than 90% of internal reference 0.6V, PGOOD is pulled high. Conversely, if FB voltage is below 74% of internal reference 0.6V, PGOOD is pulled low. VCC_EXT (RT6310B/BH) External voltage input for VCC. If an external 5V supply voltage is applied to VCC_EXT pin, VCC will be internally switchover to VCC_EXT pin and the internal LDO of VCC will be disabled for further reducing the power consumption. Notice, in order to avoid any noise disturbance including switching noise, an external 5V supply voltage must be stable and constant. Hence, a RC filter (R = 1.1/0603 and C = 4.7 F/0603) is required between an external 5V supply voltage and the VCC_EXT pin. It should be placed as close as possible to the VCC_EXT pin. Leave the VCC_EXT pin floating if this pin is not used. FF (RT6310C/CH) Output feedforward pin. FF pin is connected between inter nal divider resistors. A proper feedforward capacitor connecting from VOUT pin to FF pin can enhance the transient performance. Furthermore, FF pin is used to detect output voltage status for OVP , UVP or PGOOD. If FF voltage is below 60% of internal reference 1.7V, the UVP is triggered. If FF voltage is greater than 120% of internal reference 1.7V, the OVP is triggered. After soft-start is completed, if FF voltage is greater than 90% of internal reference 1.7V, PGOOD is pulled high. Conversely, if FF voltage is below 77% of internal reference 1.7V, PGOOD is pulled low. VCC_EXT (RT6310A/AH) (RT6310D/DH) External voltage input for VCC. If an external 5V supply voltage is applied to VCC_EXT pin, VCC will be internally switchover to VCC_EXT pin and the internal LDO of VCC will be disabled for further reducing the power consumption. Notice, in order to avoid any noise disturbance including switching noise, an external 5V supply voltage must be stable and constant. Hence, a RC filter (R = 1.1/0603 and C = 4.7F/0603) is required between an external 5V supply voltage and the VCC_EXT pin. It should be placed as close as possible to the VCC_EXT pin. Leave the VCC_EXT pin floating if this pin is not used. VOUT (RT6310B/BH) Output voltage sense pin. Connect to the output of buck converter. LDO3 (3.3V) will be internally switchover to VOUT pin when the LDO bypass switch is turned on. Furthermore, VOUT pin is used to detect output voltage status for OVP , UVP or PGOOD. If output voltage is below 60% of fixed output voltage 3.3V, the UVP is triggered. If output vol tage is greater than 120% of fixed output voltage 3.3V, the OVP is triggered. After soft-start is completed, if output voltage is greater than 90% of fixed output voltage 3.3V, PGOOD is pulled high. Conversely, if output voltage is below 77% of fixed output voltage 3.3V, PGOOD is pulled low. VOUT (RT6310C/CH) Output voltage sense pin. Connect to the output of buck converter. LDO5 (5V) and VCC will be internally switchover to VOUT pin when the VCC and LDO bypass switches are turned on.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Pin No. Pin Name Pin Function ILMT (RT6310A/AH) Valley current-limit setting pin. 13A : Connect ILMT pin to PGND. 15A : Leave ILMT pin floating/open. 17A : Connect ILMT pin to 5V. ILMT (RT6310D/DH) Valley current-limit setting pin. 6.5A : Connect ILMT pin to PGND. 16A : Leave ILMT pin floating/open. 25.8A : Connect ILMT pin to 5V. LDO3 (RT6310B/BH) Internal 3.3V LDO output. Bypass a capacitor (10 F/0603) to PGND. This pin is capable of sourcing 100mA. When input voltage exceeds the UVLO rising threshold, the internal 3.3V LDO is enabled. Besides, LDO3 switchovers to VOUT pin after soft-start period is finished. LDO5 (RT6310C/CH) Internal 5V LDO output. Bypass a capacitor (10 F/0603) to PGND. This pin is capable of sourcing 100mA. When input voltage exceeds the UVLO r ising threshold, the internal 5V LDO is enabled. Besides, LDO5 switchovers to VOUT pin after soft-start period is finished.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Functional Block Diagram Input UVLO VIN EN/MODE LX PWM Control Protect Logic PGND BOOT Internal SST Thermal Protection FB Current Sense PGOOD AGND VCCVCC_EXT LDO 4.7V 0.6V ILMT EN/MODE RT6310A/AH/D/DH CMP VCC Bypass Switch ISNK CMP CMP VCC 1.5M 1.5M VCC 0.9V 0.9V VIN
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Input UVLO VIN EN/MODE LX PWM Control Protect Logic PGND BOOT Internal SST Thermal Protection Current Sense PGOOD VCCVCC_EXT LDO 4.7V RT6310B/BH VCC Bypass Switch ISNK VIN 1.1V VOUT AGND CMP LDO33.3V LDOVIN 3.1V LDO Bypass Switch 80k 40k
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Input UVLO VIN EN/MODE LX PWM Control Protect Logic PGND BOOT Internal SST Thermal Protection Current Sense PGOOD VCC LDO 4.7V RT6310C/CH VCC Bypass Switch ISNK VIN 1.7V VOUT AGND CMP FF LDO 4.7V LDO Bypass Switch VIN LDO5 80k 40k
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. current due to the output capacitor ESR. regulated through the previously mentioned principle. inductor during higher load condition. regulation without affecting the transient performance. Figure 1. Conventional COT Control Loop Operation free-wheeling current becomes negative.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. switching frequency smoothly increases to preset value. Figure 2. Boundary Condition of CCM/DEM response (especially at low input voltage level). acoustic frequency is avoided in ultrasonic mode. the device operates in ultrasonic mode. low-side MOSFET off and waits for next trigger. RT6310 provides a smart reduction on -time function. decreases on -time when load current is decreasing. Therefore, the output voltage ripple is reduced.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. current for eliminating floating voltage on EN/MODE pin. EN/MODE input voltage is shown in Figure 3. Figure 3. Characteristics of EN/MODE Input Current large input inrush current and output voltage overshoot. ⚫ 13A : Connect ILMT pin to PGND. ⚫ 15A : Leave ILMT pin floating/open. ⚫ 17A : Connect ILMT pin to 5V. ⚫ 6.5A : Connect ILMT pin to PGND. ⚫ 16A : Leave ILMT pin floating/open. ⚫ 25.8A : Connect ILMT pin to 5V. limit for avoiding the large output current and overheat . of the inductor with the valley current -limit threshold. of inductor reaches valley current-limit threshold. circuit is built internally. current limit works in every switching cycle.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com during the ON state of h igh-side MOSFET. During the ON state of high-side MOSFET, the measured high-side MOSFET voltage is proportional to the high -side MOSFET current. In order to prevent the device from inductor saturation or any risk of damage, if the measured high -side MOSFET current is higher than peak current -limit threshold, the on -time timer is terminated immediately to limit the inductor current and the inductor current is decreased by turning on the low -side MOSFET. Once the low-side MOSFET current is below valley curren t- limit threshold, the next one -shot on -time timer is permitted to generate. The circuit of the cycle -by-cycle peak current limit works in every switching cycle. Output Under-Voltage Protection (UVP) The output under-voltage protection of RT6310 includes latched and hiccup mode . If th e inductor current is higher than current-limit threshold (valley/peak current - limit threshold) during heavy -load condition, the output voltage tends to drop because the load demand exceeds that the converter can support. When the load demand is larger than the current ability of converter, the VFB (RT6310A/AH/D/DH)/VOUT (RT6310B/BH) / VFF (RT6310C/CH) starts to drop. Once the VFB/ VOUT/ VFF drops below typical 60% of reference/target voltage and the time length of this state is larger than the time width 11 s (typical) , the latched/hiccup mode UVP is triggered. The different behaviors for latched/hiccup mode UVP is as follows : ⚫ The RT6310A/B/C/D provides output under -voltage protection (UVP) with latched mode. Once UVP is triggered, the IC stop s PWM switching and enter latched mode. If UVP event is released, users should re-toggle the EN/MODE pin or power recycle VIN supply to re-power on the device. ⚫ The RT6310AH/BH/CH/DH provides output under - voltage protection (UVP) with hiccup mode. Once UVP is triggered, the IC takes a determined period for initiating auto -recovery soft -start sequence. If UVP event is released , the output voltage is regulated to target reference. Output Over-Voltage Protection (OVP) The output over-voltage protection of RT6310 includes latched and non -latched mode . If the VFB/VOUT/VFF rises above typical 120% o f reference/target voltage and the time length of this state is larger than the time width 12s (typical), the latched/non-latched mode OVP is triggered. The different behaviors of latched/non - latched mode OVP is as follows : ⚫ The RT6310A/B/C/D provides output over -voltage protection (OVP) with latched mode. Once OVP is triggered, the IC stops PWM switching and enter latched mode. If OVP event is released, users should re-toggle the EN/MODE pin or power recycle VIN supply to re-power on the device. ⚫ The RT6310AH/BH/CH/DH provides output over - voltage protection (OVP) with non -latched mode. Once OVP is triggered, the IC stops PWM switching and enter non-latched mode. If the OVP condition is released and the output voltage is lower than regulation level, the device returns to regulate output voltage. Over-Temperature Protection (OTP) The over -temperature protection of RT6310 includes latched and non-latched mode. OTP circuitry prevents device from overheating due to excessive power dissipation. If the junction temperature of device exceeds typical 150C, the OTP is triggered to stop the temperature rising. The behavior s of latched and non- latched mode OTP is as follows : ⚫ The RT6310A/B/C/D provides over-temperature protection (OTP) with latched mode. Once OTP is triggered, the IC stops PWM switching and enter latched mode. If OTP event is released, users should re-toggle the EN/MODE pin or power rec ycle VIN supply to re-power on the device. ⚫ The RT6310AH/BH/CH/DH provides over - temperature protection (OTP) with non-latched mode. Once OTP is triggered, the IC stops PWM switching and enter non -latched mode. If the junction temperature of device drops below typical 130C , the device enables the soft -start function to build the output voltage.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Input Under-Voltage-Lockout (UVLO) The RT6310 provides an Under -Voltage-Lockout (UVLO) function that monitors the input voltage. In order to protect the device from operating at insufficient input voltage, the UVLO function inhibits switching when input voltage drops below the UVLO falling threshold. The IC resumes switching when input voltage exceeds the UVLO rising threshold. Enable Control and Mode Selection The EN/MODE pin integrates both enable control and mode selection (USM/DEM) for RT6310A/AH/B/BH/C/CH, but only provides enable control for RT6310D/DH. If EN/MODE voltage is less than 0.23V, the RT6310 is turned off (shutdown). If EN/MODE voltage is larger than 0 .88V, the RT6310D/DH is turned on and the operation mode is DEM. If EN/MODE voltage ranges from 0.88V to 1.7V, the RT6310A/AH/B/BH/C/CH is turned on and the operation mode is USM. Moreover, if EN/MODE voltage is larger than 2.3V, the RT6310A/AH/B/BH/C/CH i s turned on and the operation mode is DEM. For the EN/MODE control logic and operation mode selection, please refer to Table 1 and Table 2.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Table 1. RT6310 Operation Mode Selection Table 2. RT6310 Power Logic
0 X OFF OFF N/A OFF
0 X OFF ON ON OFF
0 N/A N/A ON ON OFF
1 N/A N/A ON ON ON
Input*: VIN is ready in the whole power logic table. VCC_EXT*: Logic = 1 means VCC_EXT 4.9V. Logic = 0 means VCC_EXT 4.2V.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Internal Output Voltage Discharge The RT6310 has an output voltage discharge function by using an internal MOSFET 50 (typical), which is connected from the LX pin to PGND pin. The output voltage discharge function is enabled if any of the following events is triggered : ⚫ Input under-voltage-lockout (UVLO) ⚫ Output under/over-voltage protection (UVP/OVP) ⚫ Over-temperature protection (OTP) ⚫ EN/MODE pin is pulled low Internal VCC Regulator (VCC) The internal VCC regulator is a linear regulator. The VCC regulator steps down input voltage to typical 5V in order to supply both internal circuitry and gate drivers. DO NOT connect to any external loads. Connect a capacitor (C = 1 F/0603) f rom VCC pin to AGND pin. RT6310A/AH/D/DH enables VCC regulator after V IN rises higher than UVLO rising threshold and EN/MODE voltage is larger than EN/MODE input high voltage. RT6310B/BH or RT6310C/CH enables VCC regulator after VIN rises higher than UVLO rising threshold. The power logic of VCC is shown in Table 2. For lower power consumption, VCC switchovers to the following pins as the specified condition (refer to Figure 4 and Figure 5) is satisfied : RT6310A/AH : VCC_EXT pin RT6310D/DH : VCC_EXT pin RT6310B/BH : VCC_EXT pin RT6310C/CH : VOUT pin Low Dropout Regulator (LDO) Both RT6310B/BH and RT6310C/CH have 3.3V LDO and 5V LDO, respectively. The output current capability of these two LDOs are 100mA. The output current limit of these two LDOs are 200mA. Once the input voltage exceeds the UVLO rising threshold, the LDO is enabled. In order to reduce the power consum ption, LDO switchovers to VOUT pin through the LDO bypass switch when the following events are all satisfied : ⚫ Soft-start is completed ⚫ VOUT pin voltage is higher than LDO bypass switch turn-on voltage LDO bypass switch turn -on voltage of RT6310B/BH is 3.1V LDO bypass switch turn -on voltage of RT6310C/CH is 4.7V The LDO bypass switch is turned off when any of the following specified events is triggered : ⚫ Input under-voltage-lockout (UVLO) ⚫ Output under/over-voltage protection (UVP/OVP) ⚫ Over-temperature protection (OTP) ⚫ EN/MODE pin is pulled low ⚫ Soft-start is not completed ⚫ The VOUT pin voltage is lower than LDO bypass switch turn -off voltage (LDO bypass switch turn -on voltage minus LDO bypass switch hysteresis voltage) LDO bypass switch turn-off voltage of RT6310B/BH is 2.9V LDO bypass switch turn-off voltage of RT6310C/CH is 4.5V External Voltage Input for VCC (VCC_EXT) The RT6310A/AH/B/BH/D/DH has VCC_EXT pin . In order to reduce the power consumption, the internal VCC regulator switchovers to VCC_EXT through the VCC bypass switch if VCC_EXT pin is connected to an external voltage larger than typical 4.7V. Once the voltage of VCC_EXT pin is lower than typical 4.5V, the VCC bypass switch is disconnected. The power logic of VCC_EXT is shown in Table 2. Power Good (PGOOD) The PGOOD pin is an open -drain output. An external pull-up resistor to VCC or other external rail is required, and the recommended pull-up resistor ranges from 10k to 100k. Do not pull the PGOOD voltage higher than 6V. In order to prevent unwanted PGOOD glitches during load transient or dynamic VOUT change, the RT6310 provides PGOOD low deglitch time with typical 20s. The PGOOD pin is pulled low when any of the following specified events is triggered : ⚫ Input under-voltage-lockout (UVLO) ⚫ Output under/over-voltage protection (UVP/OVP) ⚫ Over-temperature protection (OTP) ⚫ EN/MODE pin is pulled low
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. sequence information is shown in Figure 4 to Figure 12.
- SS (soft-start): soft-start with ramp
Figure 4. Power On Sequence of RT6310A/AH/D/DH : Ramping Up VIN Followed by VEN/MODE
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
- SS (soft-start): soft-start with ramp
Figure 5. Power On Sequence of RT6310B/BH : Ramping Up VIN Followed by VEN/MODE
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
- SS (soft-start): soft-start with ramp
Figure 6. Power On Sequence of RT6310C/CH : Ramping Up VIN Followed by VEN/MODE
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
- VEN/MODE VEN/MODE_L = 0.5V
Figure 7. Power Off Sequence of RT6310A/AH/D/DH : Ramping Down VIN
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- VEN/MODE VEN/MODE_L = 0.5V
Figure 8. Power Off Sequence of RT6310B/BH : Ramping Down VIN
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- VEN/MODE VEN/MODE_L = 0.5V
Figure 9. Power Off Sequence of RT6310C/CH : Ramping Down VIN
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 10. Power Off Sequence of RT6310A/AH/D/DH : Ramping Down VEN/MODE
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 11. Power Off Sequence of RT6310B/BH : Ramping Down VEN/MODE
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 12. Power Off Sequence of RT6310C/CH : Ramping Down VEN/MODE
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Absolute Maximum Ratings (Note 1) ESD Ratings ⚫ ESD Susceptibility (Note 2) Recommended Operating Conditions (Note 3) Thermal Information (Note 4 and Note 5) Thermal Parameter UQFN-23L 3x3 (FC) Unit JA Junction-to-ambient thermal resistance (JEDEC standard) 34.3 C/W JC(Top) Junction-to-case (top) thermal resistance 5.2 C/W JC(Bottom) Junction-to-case (bottom) thermal resistance 3.6 C/W JA(EVB) Junction-to-ambient thermal resistance (specific EVB) 30.1 C/W JC(Top) Junction-to-top characterization parameter 0.08 C/W JB Junction-to-board characterization parameter 16.6 C/W
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com
Electrical Characteristics
(VIN = 12V. The typical values are referenced to TA = TJ = 25C. Both minimum and maximum values are referenced to T A = TJ from −10C to 105C. Unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage Input Voltage Range VIN RT6310A/AH/B/BH/D/DH 4.5 -- 23 V RT6310C/CH 5.2 -- 23 Supply Current Supply Current (Shutdown) ISHDN RT6310A/AH/D/DH : VEN/MODE = 0V -- 5 -- A RT6310B/C and RT6310BH/CH : VEN/MODE = 0V -- 45 -- Supply Current (Quiescent) IQ RT6310A/AH/D/DH : VEN/MODE = 5V (diode emulation mode), VOUT = VSET x 105%, not switching 70 85 115 A RT6310B/BH : VEN/MODE = 5V (diode emulation mode), VOUT = VSET x 105%, not switching RT6310C/CH : VEN/MODE = 5V (diode emulation mode), VFF = 1.7 x 105%, not switching 75 95 130 A UVLO UVLO Rising Threshold VUVLO_Rising RT6310A/AH/B/BH/D/DH 3.8 4.1 4.4 V RT6310C/CH 4.1 4.4 4.7 UVLO Hysteresis VHYS -- 0.3 -- V Enable/Mode Logic Threshold and Timing EN/MODE Input High Voltage VEN/MODE_H 400 635 880 mV EN/MODE Input Low Voltage VEN/MODE_L 230 500 800 mV EN/MODE Input Current IEN/MODE VEN/MODE = 0.1V 0 2 4 A Ultrasonic Mode VEN/MODE RT6310A/AH/B/BH/C/CH 0.88 -- 1.7 V Diode Emulation Mode VEN/MODE RT6310A/AH/B/BH/C/CH 2.3 -- -- V Output Voltage Output Voltage Set Point VOUT RT6310B/BH TA = TJ = 25C, CCM 3.267 3.3 3.333 V RT6310C/CH 5.049 5.1 5.151 VCC Regulator Voltage VCC -- 5 -- V Feedback Reference Feedback Reference Voltage VREF RT6310A/AH/D/DH : TA = TJ = 25C, CCM 0.594 0.6 0.606 V Feedback Input Current IFB RT6310A/AH/D/DH : VFB = 4V −100 -- 100 nA
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Parameter Symbol Test Conditions Min Typ Max Unit On-Resistance High-Side MOSFET On- Resistance RDS(ON)_H TA = TJ = 25C -- 17 -- m Low-Side MOSFET On- Resistance RDS(ON)_L TA = TJ = 25C -- 7.5 -- m Discharge MOSFET On- Resistance RDISCHG TA = TJ = 25C, VEN/MODE = 0V. From LX to PGND 30 50 100 Current Limit Low-Side MOSFET Valley Current Limit ILIM_VY RT6310A/AH : TA = TJ = 25C ILMT = 0V 10 13 16 A ILMT = Open 12 15 18 ILMT = 5V 14 17 20 RT6310D/DH : TA = TJ = 25C ILMT = 0V 5 6.5 8 A ILMT = Open 14.6 16 17.9 ILMT = 5V 22.6 25.8 29.8 RT6310B/C and RT6310BH/CH : TA = TJ = 25C 12 15 18 A ILMT Rising Threshold VILMTH RT6310A/AH/D/DH VCC −0.9 -- -- V ILMT Falling Threshold VILMTL RT6310A/AH/D/DH -- -- 0.9 V Oscillator Frequency Oscillator Frequency fOSC 400 500 600 kHz On-Time Timer Control Minimum On-Time tON_MIN -- 50 -- ns Minimum Off-Time tOFF_MIN RT6310A/AH/D/DH -- 260 -- ns RT6310B/C and RT6310BH/CH -- 200 -- Ultrasonic Mode Operation Period tUSM 20 30 40 s Soft-Start Soft-Start Time tSS RT6310A/AH/D/DH TA = TJ = 25C, from EN/MODE high to PGOOD high 1.8 2.4 3 ms RT6310B/BH 1.7 2.3 2.9 RT6310C/CH 2.2 2.9 3.6 Output Rising Time tR RT6310A/AH/D/DH TA = TJ = 25C, from 10% to 90% VOUT -- 0.45 0.76 ms RT6310B/BH -- 0.75 1.22 RT6310C/CH -- 1.2 1.8 Output Over-Voltage Protection Output Over Voltage Threshold RT6310A/AH/C/CH/D/DH : VFB/VFF rising 114 120 126 % RT6310B/BH : VOUT rising Output Over Voltage Deglitch Time -- 12 -- s
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Parameter Symbol Test Conditions Min Typ Max Unit Output Over-Voltage Hysteresis RT6310AH/DH -- 14 -- % RT6310BH -- 8 -- RT6310CH -- 5 -- Output Under-Voltage Protection Output Under-Voltage Falling Threshold RT6310A/AH/C/CH/D/DH : VFB/VFF falling 55 60 65 % RT6310B/BH : VOUT falling Output Under-Voltage Rising Threshold RT6310A/AH/C/CH/D/DH : VFB/VFF rising -- 72 -- % RT6310B/BH : VOUT rising Output Under-Voltage Deglitch Time RT6310A/AH/C/CH/D/DH : force VFB/VFF below UVP falling threshold until LX stop switching. -- 11 -- s RT6310B/BH : force VOUT below UVP falling threshold until LX stop switching. UV Blank Time RT6310A/AH/D/DH From EN/MODE high 1.8 2.4 3 ms RT6310B/BH 1.7 2.3 2.9 RT6310C/CH 2.2 2.9 3.6 Power Good Power Good Threshold RT6310A/AH/C/CH/D/DH : VFB/VFF rising 85 90 95 % RT6310B/BH : VOUT rising Power Good Hysteresis RT6310A/AH/D/DH TA = TJ = 25C -- 10.7 -- % RT6310B/BH 10.9 RT6310C/CH -- 7.1 -- Power Good Low Deglitch Time -- 20 -- s LDO Regulator LDO Output Voltage VLDO3 RT6310B/BH TA = TJ = 25C, VEN/MODE = 0V, no bypass 3.25 3.3 3.35 V VLDO5 RT6310C/CH 4.925 5 5.075 LDO Dropout Voltage VDROP ILDO = 20mA, VEN/MODE = 0V, no bypass. (Note 6) -- 200 -- mV LDO Output Current Limit ILIM_LDO 120 200 300 mA LDO Bypass Switch LDO Bypass Switch On- Resistance RBYP_LDO RT6310B/BH TA = TJ = 25C -- 2.6 -- RT6310C/CH -- 1.8 -- LDO Bypass Switch Turn-on Voltage VBYP_LDO_ ON RT6310B/BH 2.9 3.1 3.3 V RT6310C/CH 4.5 4.7 4.9 Bypass Switch Switchover Hysteresis RT6310B/C and RT6310BH/CH : 0.1 0.2 0.3 V
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Parameter Symbol Test Conditions Min Typ Max Unit VCC Bypass Switch VCC Bypass Switch On- Resistance RBYP_VCC TA = TJ = 25C -- 4.4 -- VCC Bypass Switch Turn-on Voltage VBYP_VCC_ ON 4.5 4.7 4.9 V VCC Bypass Switch Switchover Hysteresis 0.1 0.2 0.3 V Thermal Shutdown Thermal Shutdown Threshold TSD -- 150 -- C Thermal Shutdown Hysteresis TSD_HYS RT6310AH/BH/CH/DH -- 20 -- C Note 1. Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. Devices are ESD sensitive. Handling precautions are recommended. Note 3. The device is not guaranteed to function outside its operating conditions. Note 4. For more information about thermal parameter, see the Application and Definition of Thermal Resistances report, AN061. Note 5. θJA(EVB), ΨJC(TOP) and ΨJB are measured on a high effective -thermal-conductivity four-layer test board (Richtek EVB) which is in size of 140mm x 90mm; furthermore, all layers with 1 oz. Cu. Thermal resistance/parameter values may vary depending on the PCB material, layout, and test environmental conditions. Note 6. Guaranteed by design.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Typical Application Circuit RBOOT* : RBOOT is reserved for option. RBOOT must be less than 10. FB ILMT VCC_EXT VIN EN/MODE LX VOUT VIN L CIN RT6310A/AH RT6310D/DH4.5V to 23V 10μFx2 0.1μFx1 0.68μH 30.9k 41.2k COUT 22μFx6 1.05V/10A CFF 15, 16 PGOOD BOOT AGND PGND VCCVCC CVCC 1μF VILMT VEN/MODE VCC_EXT REXT CEXT 4.7μF CBOOT 0.1μF RBOOT* VPGOOD 2, 3 4 to 14 100k RPGOOD CEN/MODE 0.1μF 68pF 1.1 VOUT LDO3 VCC_EXT VIN EN/MODE LX VOUT VIN L CIN RT6310B/BH 4.5V to 23V 1.5μH COUT 22μFx4 3.3V/10A 15, 16 PGOOD BOOT AGND PGND VCCVCC CVCC 1μF VEN/MODE VCC_EXT REXT CEXT 4.7μF CBOOT 0.1μF RBOOT* VPGOOD 2, 3 4 to 14 CLDO3 10μF VLDO3 3.3V/100mA CEN/MODE 0.1μF 100k RPGOOD 10μFx2 0.1μFx1 1.1 RBOOT* : RBOOT is reserved for option. RBOOT must be less than 10.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 RBOOT* : RBOOT is reserved for option. RBOOT must be less than 10. VOUT LDO5 VIN EN/MODE LX VOUT VIN L CIN RT6310C/CH 5.2V to 23V 1.5μH COUT 22μFx4 5.1V/10A 15, 16 PGOOD BOOT AGND PGND VCCVCC CVCC 1μF VEN/MODE CBOOT 0.1μF RBOOT* VPGOOD 2, 3 4 to 14 CLDO5 10μF VLDO5 5V/100mA CEN/MODE 0.1μF 100k RPGOOD 10μFx2 0.1μFx1 FF CFF 22pF
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Table 3. Suggested Typical Component Selections for the Application-Part I Table 4. Suggested Typical Component Selections for the Application-Part II de-rating effect, like a DC bias.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Switching Frequency vs. Output Current 100 200 300 400 500 600 0.001 0.01 0.1 1 10 Output Current (A) Switching Frequency (kHz) 1 RT6310B/BH, L = 1.5H, VOUT = 3.3V, EN/MODE = 5V, Diode Emulation Mode VIN = 7.4V VIN = 12V VIN = 19V Typical Operating Characteristics Efficiency vs. Output Current 100 0.001 0.01 0.1 1 10 Output Current (A) Efficiency (%) RT6310A/AH/D/DH, L = 0.68H, VOUT = 1.05V, EN/MODE = 5V, VCC_EXT = 5V, Diode Emulation Mode VIN = 7.4V VIN = 12V VIN = 19V Efficiency vs. Output Current 100 0.001 0.01 0.1 1 10 Output Current (A) Efficiency (%) VIN = 7.4V VIN = 12V VIN = 19V RT6310B/BH, L = 1.5H, VOUT = 3.3V, EN/MODE = 5V, VCC_EXT = 5V, Diode Emulation Mode Efficiency vs. Output Current 100 0.001 0.01 0.1 1 10 Output Current (A) Efficiency (%) VIN = 7.4V VIN = 12V VIN = 19V RT6310C/CH, L = 1.5H, VOUT = 5.1V, EN/MODE = 5V, Diode Emulation Mode Switching Frequency vs. Output Current 100 200 300 400 500 600 0.001 0.01 0.1 1 10 Output Current (A) Switching Frequency (kHz) 1 VIN = 7.4V VIN = 12V VIN = 19V RT6310A/AH/D/DH, L = 0.68H, VOUT = 1.05V, EN/MODE = 5V, Diode Emulation Mode Switching Frequency vs. Output Current 100 200 300 400 500 600 0.001 0.01 0.1 1 10 Output Current (A) Switching Frequency (kHz) 1 RT6310C/CH, L = 1.5H, VOUT = 5.1V, EN/MODE = 5V, Diode Emulation Mode VIN = 7.4V VIN = 12V VIN = 19V
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Output Voltage vs. Output Current 1.00 1.02 1.04 1.06 1.08 1.10 0.001 0.01 0.1 1 10 Output Current (A) Output Voltage (V) VIN = 19V VIN = 12V VIN = 7.4V RT6310A/AH/D/DH, L = 0.68H, VOUT = 1.05V, EN/MODE = 5V, Diode Emulation Mode Output Voltage vs. Output Current 3.15 3.20 3.25 3.30 3.35 3.40 3.45 0.001 0.01 0.1 1 10 Output Current (A) Output Voltage (V) VIN = 19V VIN = 12V VIN = 7.4V RT6310B/BH, L = 1.5H, VOUT = 3.3V, EN/MODE = 5V, Diode Emulation Mode Output Voltage vs. Output Current 4.90 4.95 5.00 5.05 5.10 5.15 5.20 5.25 5.30 0.001 0.01 0.1 1 10 Output Current (A) Output Voltage (V) VIN = 19V VIN = 12V VIN = 7.4V RT6310C/CH, L = 1.5H, VOUT = 5.1V, EN/MODE = 5V, Diode Emulation Mode VLDO3 vs. ILDO3 3.10 3.15 3.20 3.25 3.30 3.35 3.40 3.45 3.50 0 10 20 30 40 50 60 70 80 90 100 ILDO3 (mA) VLDO3 (V) RT6310B/BH, VIN = 12V, EN/MODE = 0V VLDO5 vs. ILDO5 4.80 4.85 4.90 4.95 5.00 5.05 5.10 5.15 5.20 0 10 20 30 40 50 60 70 80 90 100 ILDO5 (mA) VLDO5 (V) RT6310C/CH, VIN = 12V, EN/MODE = 0V Quiescent Current vs. Input Voltage 100 105 4 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) Quiescent Current (μA) 1 RT6310A/AH, EN/MODE = 5V, No Switching
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Shutdown Current vs. Input Voltage 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0 4 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) Shutdown Current (μA) 1 RT6310A/AH, EN/MODE = 0V Quiescent Current vs. Input Voltage 100 105 110 115 120 125 4 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) Quiescent Current (μA) 1 RT6310B/BH, EN/MODE = 5V, No Switching Shutdown Current vs. Input Voltage 4 6 8 10 12 14 16 18 20 22 24 Input Voltage (V) Shutdown Current (μA) 1 RT6310B/BH, EN/MODE = 0V RT6310B/BH, VIN = 12V, EN/MODE = 5V Power On from EN/MODE Time (500s/Div) VEN/MODE (5V/Div) VOUT (2V/Div) IL (5A/Div) PGOOD (5V/Div) VOUT = 3.3V, IOUT = 10A VOUT = 3.3V, IOUT = 10A Power Off from EN/MODE Time (50s/Div) VEN/MODE (5V/Div) VOUT (2V/Div) IL (5A/Div) PGOOD (5V/Div) RT6310B/BH, VIN = 12V, EN/MODE = 5V RT6310A/AH, VIN = 12V, EN/MODE = 5V, VOUT = 1.05V, IOUT = 1A to 10A Load Transient Response Time (50s/Div) VOUT (40mV/Div) IOUT (5A/Div) LX (10V/Div)
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com RT6310B/BH, VIN = 12V, EN/MODE = 5V, Load Transient Response Time (50s/Div) VOUT (100mV/Div) LX (10V/Div) IOUT (5A/Div) VOUT = 3.3V, IOUT = 1A to 10A RT6310C/CH, VIN = 12V, EN/MODE = 5V, VOUT = 5.1V, IOUT = 1A to 10A Load Transient Response Time (50s/Div) VOUT (200mV/Div) LX (10V/Div) IOUT (5A/Div) RT6310B/BH VIN = 12V, Over Current Limit Time (10s/Div) VOUT (1V/Div) IL (10A/Div) LX (10V/Div) EN/MODE = 5V, VOUT = 3.3V RT6310B, VIN = 12V, EN/MODE = 5V, VOUT = 3.3V, No Load VOUT OVP with Latched Mode Time (20s/Div) VOUT (1V/Div) LX (5V/Div) PGOOD (5V/Div) RT6310B, VIN = 12V, VOUT UVP with Latched Mode Time (10s/Div) VOUT (1V/Div) LX (10V/Div) PGOOD (5V/Div) EN/MODE = 5V, VOUT = 3.3V RT6310BH, VIN = 12V VOUT OVP with Non -Latched Mode Time (1ms/Div) VOUT (3V/Div) LX (5V/Div) PGOOD (5V/Div) VOUT = 3.3V, IOUT = 50mA EN/MODE = 5V,
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 RT6310BH, VIN = 12V, EN/MODE = 5V, VOUT = 3.3V VOUT UVP with Hiccup Mode Time (1ms/Div) VOUT (2V/Div) LX (10V/Div) PGOOD (5V/Div)
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 14. CIN Ripple Voltage and Ripple Current applications due to its small, robust and very low ESR. should be 0402 or 0603 in size. ESR and RMS current handling requirements.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. because of the higher power dissipation across the LDO. temperature are also increased. Figure 15. Output Voltage Setting good light-load efficiency is desired. components of compensator are integrated in the IC.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. frequency approximately, as shown in Figure 19. Figure 19. A Simple Way to Get the Bandwidth from equation (5), as shown in equation (6). an offset voltage into V OUT to cause VOUT inaccuracy.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 20. De-rating Curve of Maximum Power mode power supply IC is critical and important. layout for switching power supply. wide and kept away from high switching path. performance and good efficiency. 21 to Figure 23 for reference.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. and Do NOT use any via for LX. at least two layers of PGND trace. Figure 23. RT6310C/CH Layout Guide
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. Figure 26. Thermal image of RT6310C/CH with VOUT = 5.1V, VIN=19V, IOUT = 10A
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Outline Dimension Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 0.500 0.600 0.020 0.024 A1 0.000 0.050 0.000 0.002 Tolerance U-Type 23L QFN 3x3 (FC) Package
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Footprint Information Package Number of Pin Tolerance V/W/U/XQFN3x3-23(FC) 23 ±0.05
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Packing Information Tape and Reel Data Package Type Tape Size (W1) (mm) Pocket Pitch (P) (mm) Reel Size (A) Units per Reel Trailer (mm) Leader (mm) Reel Width (W2) Min./Max. (mm) (mm) (in) QFN/DFN 3x3 12 8 180 7 1,500 160 600 12.4/14.4 Tape Size W1 P B F ØJ H C, D and K are determined by component size. The clearance between the components and the cavity is as follows: - For 12mm carrier tape: 0.5mm max.
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Tape and Reel Packing Step Photo / Description Step Photo / Description Reel 7” 3 reels per inner box Box A HIC & Desiccant (1 Unit) inside 12 inner boxes per outer box Caution label is on backside of Al bag Outer box Carton A Container Package Reel Box Carton Size Units Item Size(cm) Weight(Kg) Reels Units Item Size(cm) Boxes Unit QFN & DFN 3x3 7” 1,500
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. DS6310-04 August 2023 www.richtek.com Packing Material Anti-ESD Property Richtek Technology Corporation 14F, No. 8, Tai Yuen 1st Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications witho ut notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. R ichtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or oth er rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries. Surface Resistance Aluminum Bag Reel Cover tape Carrier tape Tube Protection Band /cm2 104 ~ 1011 104 ~ 1011 104 ~ 1011 104 ~ 1011 104 ~ 1011 104 ~ 1011
Copyright © 2023 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. www.richtek.com DS6310-04 August 2023 Datasheet Revision History Version Date Description Item 03 2023/2/8 Modify Features on P1 Operation on P12, 22, Absolute Maximum Ratings on P26 Electrical Characteristics on P27, 28, 29, 30 Typical Operating Characteristics on P35, 36, 37, 38 Application Information on P39 04 2023/8/14 Modify Ordering Information on P3 Operation on P17, 18, 19, 20, 22, 23, 24, 25 Electrical Characteristics on P29