RP504X NISSHINBO | Alldatasheet

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600 mA PWM/VFM Step-Down DC/DC Converter with Synchronous Rectifier NO.EA-259-170620 OUTLINE The RP504x is a low supply current CMOS-based PWM/VFM step-down DC/DC converter with synchronous rectifier featuring 600 mA *1 output current . Internall y, a single converter c onsists of an oscillator, a reference voltage unit, an error amplifier, a switching control circuit, a mode control circuit (RP504xxx1A/D), a soft -start circuit, a Latch-t ype protection circuit, an under voltage lockout (UVLO) circuit a.nd switching transistors. The RP504x is employing synchronous rectification for improving the efficiency of rectification by replacing diodes with built-in switching transistors. Using synchronous rectification not only increases circuit performance but also allows a design to reduce parts count. Power controlling method can be selected from forced PWM control type or PWM/VFM auto switching control type by inputting a signal to the MODE pin. In low output current, forced PWM control switches at fixed frequency rate in order to reduce noise. Likewise, in low output current, PWM/VFM auto switching control automatically switches from PWM mode to VFM mode in order to achieve high efficiency. Output voltage is internally fixed type which allows output voltages that range from 0.8 V to 3.3 V in 0.1 V step. The output voltage accuracy is as high as ±1.5% or ±18 mV. Protection circuits included in the RP504x are overcurrent protection circuit and latch type protection circuit . Overcurrent protection circuit supervises the inductor peak current in each switching cycle, and if the current exceeds the LX current limit (ILXLIM), it turns off P-channel Tr. Latch type protection circuit latches the built-in driver to the OFF state and stops the operation of the step-down DC/DC converter if the overcurrent status continues or VOUT continues being the half of the setting voltage for equal or longer than protection delay time (tprot). To cancel the latch type protection circuit, select the standby mode or the active mode with the CE pin, or drop the power supply voltage below the UVLO detector threshold. The RP504x is offered in 6-p in DFN(PL)1216-6F, 6-pin DFN1616-6B and 5-p in SOT-23-5 packages which ac hieve the smallest possible footprint solution on boards where area is limited. *1 This is an approximate value. The output current is dependent on conditions and external components.

NO.EA-259-170620

FEATURES

  • Temperature-Drift Coefficient of Output Voltage ... Typ. ±40 ppm/°C “L” : PWM/VFM auto switching control *1 DFN(PL)1216-6F, DFN1616-6B: forced PWM control by pulling MODE pin “H” or PWM/VFM auto switching control by pulling MODE pin “L” SOT-23-5: forced PWM control for RP504xxxxC and PWM/VFM auto switching control for RP504xxxxB AP PLICATIONS
  • Power source for battery-powered equipment.
  • Power source for hand-held communication equipment, cameras, VCRs, camcorders.
  • Power source for HDD, portable equipment.

NO.EA-259-170620 SELECTION GUIDE The set output voltage, the package type, the MODE control pin function and the auto-discharge*1 function are user-selectable options. Product Name Package Quantity per Reel Pb Free Halogen Free RP504Kxx1$-E2 DFN(PL)1216-6F 5,000 pcs Yes Yes RP504Lxx1$-TR DFN1616-6B 5,000 pcs Yes Yes RP504Nxx1$-TR-FE SOT-23-5 3,000 pcs Yes Yes xx: Specify the set output voltage (VSET) within the range of 0.8 V(08) to 3.3 V(33) in 0.1 V steps. Refer to the section of PACKAGE INFORMATION for detailed information. Specify the package type, the MODE control pin function and the auto-discharge function. $ Package MODE Control Pin Function Auto-discharge Function MODE Pin Power Controlling Method A DFN1616-6B Yes “H”: forced PWM “L”: PWM/VFM auto switching control No DFN(PL)1216-6F B SOT-23-5 No PWM/VFM auto switching control No C SOT-23-5 No forced PWM control No D DFN1616-6B Yes “H”: forced PWM control “L”: PWM/VFM auto switching control Yes DFN(PL)1216-6F *1 Auto-discharge function quickly lowers the output voltage to 0 V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor. *2 0.05 V step is also available as a custom code.

NO.EA-259-170620 BLOCK DIAGRAMS RP504xxxxA Block Diagram RP504xxxxB Block Diagram SWITCHING CONTROL CURRENT PROTECTION SOFT START VREF Lx VOUT VIN CE GND OSCILLATOR PWM CURRENT FEEDBACK RAMP COMPENSATION UVLO MODE CHIP ENABLE SWITCHING CONTROL CURRENT PROTECTION SOFT START VREF Lx VOUT VIN CE GND OSCILLATOR PWM CURRENT FEEDBACK RAMP COMPENSATION UVLO MODE CHIP ENABLE

NO.EA-259-170620 RP504xxxxC Block Diagram RP504xxxxD Block Diagram SWITCHING CONTROL CURRENT PROTECTION SOFT START VREF Lx VOUT VIN CE GND OSCILLATOR PWM CURRENT FEEDBACK RAMP COMPENSATION UVLO MODE CHIP ENABLE SWITCHING CONTROL CURRENT PROTECTION SOFT START VREF LX VOUT VIN CE GND OSCILLATOR PWM CURRENT FEEDBACK RAMP COMPENSATION UVLO MODE CHIP ENABLE

NO.EA-259-170620 PIN DESCRIPTION 6 6 5 4 1 2 3 1 3 5 4 DFN(PL)1216-6F Pin Configurations DF N1616-6B Pin Configurations SOT-23-5 Pin Configurations RP504Kxx1A, RP504Kxx1D: DFN(PL)1216-6F Pin Description Pin No. Symbol Description

1 VIN Input Pin

2 MODE

(“H”: forced PWM control, “L”: PWM/VFM auto switching control)

3 CE Chip Enable Pin (Active-high)

4 VOUT Output Pin

5 GND Ground Pin

6 LX LX Switching Pin

504Lxx1A, RP504Lxx1D: DFN1616-6B Pin Description Pin No. Symbol Description

1 CE Chip Enable Pin (Active-high)

(“H”: forced PWM control, “L”: PWM/VFM auto switching control)

3 VIN Input Pin

4 LX LX Switching Pin

6 VOUT Output Pin

∗ The tab on the bottom of the package enhances thermal performance and is electrically connected to GND (substrate level). It is recommended that the tab be connected to the ground plane on the board. If not, the tab can be left open. RP 504Nxx1B, RP504Nxx1C: SOT-23-5 Pin Description Pin No. Symbol Description

1 VOUT Output Pin

2 GND Ground Pin

3 LX LX Switching Pin

4 VIN Input Pin

5 CE Chip Enable Pin (Active-high)

NO.EA-259-170620 ABSOLUTE MAXIMUM RATINGS Abs olute Maximum Ratings (GND = 0 V) Symbol Item Rating Unit VIN VIN Input Voltage −0.3 to 6.5 V VLX LX Pin Voltage −0.3 to VIN +0.3 V VCE CE Pin Input Voltage −0.3 to 6.5 V VMODE Mode Control Pin Voltage −0.3 to 6.5 V VOUT VOUT Pin Voltage −0.3 to 6.5 V ILX LX Pin Output Current 900 mA PD Power Dissipation (Standard Land Pattern)*1 DFN(PL)1216-6F 385 mW DFN1616-6B 640 SOT-23-5 420 Tj Junction Temperature Range −40 to 125 °C Tstg Storage Temperature Range −55 to 125 °C *1 Refer to POWER DISSIPATION for detailed information. ABSOLUTE MAXIMUM RATINGS Electronic and mechanical stress momentarily exceeded absolute maximum ratings may cause the permanent damages and may degrade the life time and safety for both device and system using the device in the field. The functional operation at or over these absolute maximum ratings is not assured. RECOMMENDED OPERATING CONDITIONS Re commended Operating Conditions Symbol Item Rating Unit VIN Operating Input Voltage 2.3 to 5.5 (VOUT ≥ 1.0) V 2.3 to 4.5 (VOUT < 1.0) V Ta Operating Temperature Range −40 to 85 °C RECOMMENDED OPERATING CONDITIONS All of electronic equipment should be designed that the mounted semiconductor devices operate within the recommended operating conditions . The semiconductor devices cannot operate normally over the recommended operating conditions, even if when they are used over such conditions by momentary electronic noise or surge. And the semiconductor devices may receive serious damage when they continue to operate over the recommended operating conditions.

NO.EA-259-170620

ELECTRICAL CHARACTERISTICS

RP504xxx1A, RP504xxx1D Electrical Characteristics (Ta = 25°C) Symbol Item Conditions Min. Typ. Max. Unit VOUT Output Voltage VIN = VCE = 3.6 V or VSET +1 V VOUT ≥ 1.2 V x0.985 x1.015 V VOUT < 1.2 V −0.018 +0.018 ∆VOUT/∆Ta Output Voltage Temperature Coefficient −40°C ≤ Ta ≤ 85°C ±40 ppm/°C fosc Oscillator Frequency VIN = VCE = 3.6 V or VSET +1 V 1.95 2.25 2.55 MHz IDD1 Supply Current 1 VIN = VCE = 5.5 V, VOUT = VSET × 0.8 400 800 µA IDD2 Supply Current 2 VIN = VCE = VOUT = 5.5 V VMODE = 0 V 25 40 µA VMODE = 5.5 V 400 800 Istandby Standby Current VIN = 5.5 V, VCE = 0 V 0 5 µA ICEH CE "H" Input Voltage VIN = VCE = 5.5 V −1 0 1 µA ICEL CE "L" Input Voltage VIN = 5.5 V, VCE = 0 V −1 0 1 µA IMODEH Mode "H" Input Current VIN = VMODE = 5.5 V −1 0 1 µA IMODEL Mode "L" Input Current VIN = 5.5 V, VMODE = 0 V −1 0 1 µA IVOUTH VOUT "H" Input Current*1 VIN = VOUT = 5.5 V, VCE = 0 V −1 0 1 µA IVOUTL VOUT "L" Input Current VIN = 5.5 V, VCE = VOUT = 0 V −1 0 1 µA ILXLEAKH LX Leakage Current "H" VIN = VLX = 5.5 V, VCE = 0 V −1 0 5 µA ILXLEAKL LX Leakage Current "L" VIN = 5.5 V, VCE = VLX = 0 V −5 0 1 µA VCEH CE "H" Input Voltage VIN = 5.5 V 1.0 V VCEL CE "L" Input Voltage VIN = 2.3 V 0.4 V VMODEH Mode ”H” Input Voltage VIN = 5.5 V 1.0 V VMODEL Mode ”L” Input Voltage VIN = 2.3 V 0.4 V RLOW Nch On Resistance*2 VIN = 3.6 V, VCE = 0 V 30 Ω RONP On Resistance of Pch Tr. VIN = 3.6 V, ILX = −100 mA 0.34 Ω RONN On Resistance of Nch Tr. VIN = 3.6 V, ILX = −100 mA 0.43 Ω Maxduty Oscillator Maximum Duty Cycle 100 % tstart Soft-start Time VIN = VCE = 3.6 V or VSET +1 V 150 310 µs ILXLIM Lx Current Limit VIN = VCE = 3.6 V or VSET +1 V 700 900 mA tprot Protection Delay Time VIN = VCE = 3.6 V or VSET +1 V 0.5 1.5 5 ms VUVLO1 UVLO Detector Threshold VIN = VCE 1.9 2.0 2.1 V VUVLO2 UVLO Released Voltage VIN = VCE 2.0 2.1 2.2 V All test items listed under ELECTRICAL CHARACTERISTICS are done under the pulse load condition (Tj ≈ Ta = 25°C) except Output Voltage Temperature Coefficient. Test circuit is "OPEN LOOP" and AGND = PGND = 0 V unless otherwise specified. *1 Only for RP504xxx1A/B/C with no auto-discharge *2 Only for RP504xxx1D with auto-discharge

NO.EA-259-170620 RP504xxxxB, RP504xxxxC Electrical Characteristics (Ta = 25°C) Symbol Item Conditions Min. Typ. Max. Unit VOUT Output Voltage VIN = VCE = 3.6 V or VSET +1 V VOUT ≥ 1.2 V x0.985 x1.015 V VOUT < 1.2 V −0.018 +0.018 ∆VOUT/∆Ta Output Voltage Temperature Coefficient −40°C ≤ Ta ≤ 85°C ±40 ppm/°C fosc Oscillator Frequency VIN = VCE = 3.6 V or VSET +1 V 1.95 2.25 2.55 MHz IDD1 Supply Current 1 VIN = VCE = 5.5 V, VOUT = VSET × 0.8 400 800 µA IDD2 Supply Current 2 VIN = VCE = VOUT = 5.5 V RP504xxx1B 25 40 µA RP504xxx1C 400 800 Istandby Standby Current VIN = 5.5 V, VCE = 0 V 0 5 µA ICEH CE "H" Input Voltage VIN = VCE = 5.5 V −1 0 1 µA ICEL CE "L" Input Voltage VIN = 5.5 V, VCE = 0 V −1 0 1 µA IVOUTH VOUT "H" Input Current VIN = VOUT = 5.5 V, VCE = 0 V −1 0 1 µA IVOUTL VOUT "L" Input Current VIN = 5.5 V, VCE = VOUT = 0 V −1 0 1 µA ILXLEAKH LX Leakage Current "H" VIN = VLX = 5.5 V, VCE = 0 V −1 0 5 µA ILXLEAKL LX Leakage Current "L" VIN = 5.5 V, VCE = VLX = 0 V −5 0 1 µA VCEH CE "H" Input Voltage VIN = 5.5 V 1.0 V VCEL CE "L" Input Voltage VIN =2.3 V 0.4 V RONP On Resistance of Pch Tr. VIN =3.6 V, ILX = −100 mA 0.34 Ω RONN On Resistance of Nch Tr. VIN =3.6 V, ILX = −100 mA 0.43 Ω Maxduty Oscillator Maximum Duty Cycle 100 % tstart Soft-start Time VIN = VCE = 3.6 V or VSET +1 V 150 310 µs ILXLIM LX Current Limit VIN = VCE = 3.6 V or VSET +1 V 700 900 mA tprot Protection Delay Time VIN = VCE = 3.6 V or VSET +1 V 0.5 1.5 5 ms VUVLO1 UVLO Detector Threshold VIN = VCE 1.9 2.0 2.1 V VUVLO2 UVLO Released Voltage VIN = VCE 2.0 2.1 2.2 V All test items listed under ELECTRICAL CHARACTERISTICS are done under the pulse load condition (Tj ≈ Ta = 25°C) except Output Voltage Temperature Coefficient. Test circuit is "OPEN LOOP" and AGND = PGND = 0 V unless otherwise specified.

explained in the following figures. Figure 1. Basic Circuit Figure 2. Inductor Current (IL) flowing through Inductor in proportion to the on-time period (ton) of P-channel Tr. N-channel Tr. turns “OFF”. This is called discontinuous current mode. IL starts increasing from ILmin. This is called continuous current mode. (fosc) is constantly maintained. Tr. would be the same as ILmin and ILmax during toff of the P-channel Tr. The current differential between ILmax and ILmin is described as ∆I. L” shows the amount of current change at “ON” state.

ton will be completely discharged during toff, as a result, ILMIN = 0. This is called discontinuous mode. When IOUT is gradually increased, eventually topen = toff and when IOUT is increased further, eventually ILMIN > 0. This is called continuous mode. Figure 3. Discontinuous Mode Figure 4. Continuous Mode In the continuous mode, the solution of Equation 1 is described as tonc. When ton < tonc, it indicates discontinuous mode, and when ton = tonc, it indicates continuous mode.

NO.EA-259-170620 TIMING CHART 1. Soft-start Time Starting-up with CE Pin The IC starts to operate when the CE pin voltage (VCE) exceeds the threshold voltage. The threshold voltage is preset between CE “H” input voltage (VCEH) and CE “L” input voltage (VCEL). After the start-up of the IC, soft-start circuit starts to operate. Then, after a certain period of time, the reference voltage (VREF) in the IC gradually increases up to the specified value. VCEH Soft-start Time IC Internal Reference Voltage VCEL Threshold Level Lx Voltage (VCE) (VREF) Soft-start Circuit operation starts. (VLX) Depending on Power Supply, Load Current, External Components (VOUT) Output Voltage CE Pin Input Voltage IC operates with PWM mode during Soft-start time. Soft-start time starts when soft -start circuit is activated, and ends when the reference voltage reaches the specified voltage. Soft start time is not always equal to the turn-on speed of the step-down DC/DC converter. Please note that the turn-on speed could be affected by the power supply capacity, the output current, the inductance value and the COUT value. Starting-up with Power Supply After the power-on, when VIN exceeds the UVLO released voltage (VUVLO2), the IC starts to operate. Then, soft- start circuit starts to operate and after a certain period of time, V REF gradually increases up to the specified value. Soft-start time starts when soft-start circuit is activated, and ends when VREF reaches the specified voltage. Output Voltage (VOUT) Input Voltage (VIN) VUVLO2 IC Internal Reference Voltage (VREF) VUVLO1 Lx Voltage (VLX) VSET VSET Depending on Power Supply, Load Current, External Components Soft-start Time IC operates with PWM mode during Soft-start time. Please note that the turn-on speed of VOUT could be affected by the power supply capacity, the output current, the inductance value, the COUT value and the turn-on speed of VIN determined by CIN.

NO.EA-259-170620 2. Under Voltage Lockout (UVLO) Circuit If VIN becomes lower than V SET, the step -down DC/DC converter stops the switching operation and ON duty becomes 100%, and then VOUT gradually drops according to VIN. If the VIN becomes lower than the UVLO detector threshold (V UVLO1), the UVLO circuit star ts to operate, V REF stops, and P-channel and N-channel built-in switch transistors turn “OFF”. As a result, VOUT drops according to the COUT capacitance value and the load. To restart the operation, VIN needs to be higher than VUVLO2. The timing chart below shows the voltage shifts of VREF, VLX and VOUT when VIN value is varied. Output Voltage (VOUT) Input Voltage (VIN) VUVLO2 IC Internal Reference Voltage (VREF) VUVLO1 Lx Voltage (VLX) VSET VSET Depending on Power Supply, Load Current, External Components Soft-start Time Falling edge (operating) and rising edge (releasing) waveforms of V OUT could be affected by the initial voltage of COUT and the output current of VOUT.

NO.EA-259-170620 3. Overcurrent Protection Circuit, Latch Type Protection Circuit Overcurrent protection circuit supervises the inductor peak current (the peak current flowing through Pch Tr.) in each switching cycle, and if the current exceeds the L X current limit (I LXLIM), it turns off Pch Tr. I LXLIM of the RP504x is set to Typ.900 mA. Latch type protection circuit latches the built-in driver to the OFF state and stops the operation of the step-down DC/DC converter if the overcurrent status continues or VOUT continues being the half of the setting voltage for equal or longer than protection delay time (tprot). Please note that ILXLIM and tprot could be easily affected by self-heating or ambient environment. If the VIN drops dramatically or becomes unstable due to short-circuit, protection operation and tprot could be affected. Protection Delay Time (tprot) Lx Current Limit (ILXlim) Lx Current Pch Tr. Current Lx Voltage (VLX) To release the latch type protection circuit, restart the IC by inputting "L" signal to the CE pin, or restart the IC with power-on or make the supply voltage lower than VUVLO1. The timing chart below shows the voltage shift of V CE, VLX and VOUT when the IC status is changed by the following orders: VIN rising → stable operation → high load → CE reset → stable operation → V IN falling → VIN recovering (UVLO reset) → stable operation. (1)(2) If the large current flows through the circuit or if the IC goes into low VOUT condition due to short-circuit or other reasons, the latch type protection circuit latches the built -in driver to “OFF” state after tprot. Then, VLX becomes "L" and VOUT turns “OFF”. (3) The latch type protection circuit is released by CE reset, which puts the IC into "L" once with the CE pin and back into "H". (4) The latch type protection circuit is released by UVLO reset, which makes VIN lower than VUVLO1. Input Voltage (VIN) VSET UVLO Detector Threshold (VUVLO1) CE Pin Input Voltage (VCE) VSET Threshold Level Lx Voltage (VLX) VSET Output Voltage (VOUT) UVLO Released Voltage (VUVLO2) (1) (2) Soft-start Time VSET Soft-start Time Soft-start Time Stable Operation Stable Operation Stable Operation Protection Delay Time Protection Delay Time UVLO Reset CE Reset Latch-type Protection Latch-type Protection (3) (4)

NO.EA-259-170620

APPLICATION INFORMATION

TYPICAL APPLICATION CIRCUIT COUT 4.7µF CE VIN L X VOUT VIN CIN 2.2µF L 2.2µH Load GND RP504N Control RP504N Typical Application Circuit: MODE Pin not included COUT 4.7µF CE MODE*1 VIN L X VOUT VIN CIN 2.2µF L 2.2µH Load GND RP504L/K Control Control RP504K/L Typical Application Circuit: MODE Pin included *1 MODE = “H”: forced PWM control, MODE = “L”: PWM/VFM auto switching control Recommended Components Symbol Capacitance Type Manufacturer CIN 2.2 µF Ceramic Capacitor C1608JB0J225K(TDK) 2.2 µF x 2 C1005JB0J225K (TDK) JMK105BJ225MV (Taiyo Yuden) 4.7 µF C1005X5R0J475M (TDK) JMK105BJ475MV (Taiyo Yuden) COUT 4.7 µF Ceramic Capacitor C1608JB0J475K (TDK) GRM188B30J475KE18 (Murata) L 2.2 µH Inductor MIPSZ2520D2R2 (FDK) MIPS2520D2R2 (FDK) MLP2520S2R2M (TDK) VLS252010T-2R2M (TDK)

NO.EA-259-170620 OUTPUT CURRENT AND SELECTION OF EXTERNAL COMPONENTS The following equations explain the relationship between output current and peripheral components used in the diagrams in TYPICAL APPLICATIONS. Ripple Current P -P value is described as I RP, ON resistance of P -channel Tr. is described as R ONP, ON resistance of N-channel Tr. is described as RONN, and DC resistor of the inductor is described as RL. Second, when P-channel Tr. is “OFF” (N-channel Tr. Is “ON”), the following equation is satisfied. Put Equation 4 into Equation 3 to solve ON duty of P-channel Tr. (DON = ton / (toff + ton)): Ripple Current is described as follows: Peak current that flows through L, and LX Tr. is described as follows: Consider I LXMAX when setting conditions of input and output, as well as selecting the external components. The above calculation formulas are based on the ideal operation of the ICS in continuous mode.

NO.EA-259-170620 TECHNICAL NOTES The performance of power supply circuits using this IC largely depends on the peripheral circuits. Please be very careful when setting the peripheral parts. When designing the peripheral circuits of each part, PCB patterns, and this IC, please do not exceed the rated values (Voltage, Current, Power).

  • Ensure the VIN and GND lines are sufficiently robust. A large switching current flows through the GND lines, the VDD line, the V OUT line, an inductor, and L X. If their i mpedance is too high, noise pickup or unstable operation may result. Set the external components as close as possible to the IC and minimize the wiring between the components and the IC, especially between a capacitor (C IN) and the VIN pin. The wiring between VOUT and load and between L and VOUT should be separated.
  • Choose a low ESR ceramic capacitor. The capacitance of CIN should be more than or equal to 2.2 µF. The capacitance of a capacitor (COUT) should be between 4.7 µF to 10 µF.
  • The Inductance value should be set within the range of 2.2 µH to 4.7 µH. However, the inductance value is limited by output voltage. Refer to the table below. The phase compensation of this IC is designed according to the COUT and L values. Choose an inductor that has small DC resistance, has enough allowable current and is hard to cause magnetic saturation. If the inductance value of an inductor is extremely small, the peak current of LX may increase. The increased L X peak current reaches “LX limit current” to trigger overcurrent protection circuit even if the load current is less than 600 mA.
  • Overcurrent protection circuit, Latch-type protection circuit may be affected by self-heating and heat radiation environment. PCB LAYOUT RP504Nxx1B/C (PKG: SOT-23-5) typical board layout Topside Backside

NO.EA-259-170620 RP504Lxx1A/D (PKG: DFN1616-6B) typical board layout Topside Backside RP505Kxx1A/D (PKG: DFN(PL)1216-6F) typical board layout Topside Backside

NO.EA-259-170620 TYPICAL CHARACTERISTICS Note: Typical Characteristics are intended to be used as reference data; they are not guaranteed. 1) Output Voltage vs. Output Current RP504x VOUT = 0.8 V RP504x VOUT = 0.8 V MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control RP504x VOUT = 1.2 V RP504x VOUT = 1.2 V MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control RP504x VOUT = 1.8 V RP504x VOUT = 1.8 V MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control 0.780 0.785 0.790 0.795 0.800 0.805 0.810 0.815 0.820 0.01 0.1 1 10 100 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=3.6V VIN=4.5V 0.780 0.785 0.790 0.795 0.800 0.805 0.810 0.815 0.820 0 100 200 300 400 500 600 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=3.6V VIN=4.5V 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 0.01 0.1 1 10 100 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=3.6V VIN=5.0V 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 0 100 200 300 400 500 600 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=3.6V VIN=5.0V 1.780 1.790 1.800 1.810 1.820 1.830 0.01 0.1 1 10 100 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=3.6V VIN=5.0V 1.780 1.790 1.800 1.810 1.820 1.830 0 100 200 300 400 500 600 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=3.6V VIN=5.0V

NO.EA-259-170620 RP504x VOUT = 3.3 V RP50 4x VOUT = 3.3 V MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control 2) Output Voltage vs. Input Voltage RP504x VOUT = 0.8 V RP504x VOUT = 1.2 V MODE = “H” Forced PWM Control MODE = “H” Forced PWM Control RP504x VOUT = 1.8 V RP50 4x VOUT = 3.3 V MODE = “H” Forced PWM Control MODE = “H” Forced PWM Control 3.270 3.280 3.290 3.300 3.310 3.320 0.01 0.1 1 10 100 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=4.3V VIN=5.0V 3.270 3.280 3.290 3.300 3.310 3.320 0 100 200 300 400 500 600 Output Current IOUT (m A) Output Voltage V OUT (V) VIN=4.3V VIN=5.0V 0.780 0.785 0.790 0.795 0.800 0.805 0.810 0.815 0.820 2 2.5 3 3.5 4 4.5 Input Voltage VIN(V) Output Voltage V OUT (V) IOUT=1mA IOUT=50mA IOUT=250mA 1.180 1.185 1.190 1.195 1.200 1.205 1.210 1.215 1.220 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage VIN(V) Output Voltage V OUT (V) IOUT=1mA IOUT=50mA IOUT=250mA 1.77 1.78 1.79 1.8 1.81 1.82 1.83 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage VIN(V) Output Voltage V OUT (V) IOUT=1mA IOUT=50mA IOUT=250mA 3.25 3.26 3.27 3.28 3.29 3.3 3.31 3.32 3.33 3.34 3.35 3.5 4 4.5 5 5.5 Input Voltage VIN(V) Output Voltage V OUT (V) IOUT=1mA IOUT=50mA IOUT=250mA

NO.EA-259-170620 3) Output Voltage vs. Temperature 4) Efficiency vs. Output Current RP504x VOUT = 0.8 V RP504x VOUT = 1.2 V RP504x VOUT = 1.8 V RP504x VOUT = 3.3 V 1.770 1.780 1.790 1.800 1.810 1.820 1.830 -50 -25 0 25 50 75 100 Temperature Ta(°C) Output Voltage V OUT (V) VIN=3.6V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=4.5V, VMODE=0V VIN=3.6V, VMODE=0V VIN=VMODE=3.6V VIN=VMODE=4.5V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=5.0V, VMODE=0V VIN=3.6V, VMODE=0V VIN=VMODE=3.6V VIN=VMODE=5.0V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=5.0V, VMODE=0V VIN=3.6V, VMODE=0V VIN=VMODE=3.6V VIN=VMODE=5.0V 100 0.01 0.1 1 10 100 1000 Output Current IOUT (mA) Efficiency (%) VIN=5.0V, VMODE=0V VIN=4.3V, VMODE=0V VIN=VMODE=3.6V VIN=VMODE=4.3V

NO.EA-259-170620 5) Supply Current vs. Temperature 6 ) Supply Current vs. Input Voltage RP504x VOUT = 1.8 V (VIN = 5.5 V) RP504x VOUT = 1.8 V MODE = “L”PWM/VFM Auto Switching Control MODE = “L”PWM/VFM Auto Switching Control 7) Output Voltage Waveform RP504x VOUT = 0.8 V (VIN = 3.6 V) RP504x VOUT = 0.8 V (VIN = 3.6 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control RP504x VOUT = 1.2V (VIN = 3.6 V) RP504x VOUT = 1.2 V (VIN = 3.6 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control -50 -25 0 25 50 75 100 Temperature Ta(°C) Supply Current (µA) Closed Loop Open Loop 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage VIN (V) Supply Current (µA) Closed Loop Open Loop -0.01 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA -0.01 0.00 0.01 0.02 0.03 0.04 0 1 2 3 4 5 6 7 8 9 10 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL IOUT=10mA -0.01 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA -0.01 0.00 0.01 0.02 0.03 0.04 0 1 2 3 4 5 6 7 8 9 10 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL IOUT=10mA

NO.EA-259-170620 RP504x VOUT = 1.8 V (VIN = 3.6 V) RP504x VOUT = 1.8 V (VIN = 3.6 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control RP504x VOUT = 3.3 V (VIN = 5.0 V) RP504x VOUT = 3.3 V (VIN = 5.0 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “H” Forced PWM Control 8) Frequency vs. Temperature 9 ) Frequency vs. Input Voltage -0.01 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA -0.01 0.00 0.01 0.02 0.03 0.04 0 1 2 3 4 5 6 7 8 9 10 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 -50 100 Inductor Current IL (mA) Output Voltage IL IOUT=10mA -0.01 0.00 0.01 0.02 0.03 0.04 0 5 10 15 20 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 100 200 300 Inductor Current IL (mA) Output Voltage IL IOUT=10mA -0.01 0.00 0.01 0.02 0.03 0.04 0 1 2 3 4 5 6 7 8 9 10 Time t (µs) Output Ripple Voltage (AC) Vripple (V) -100 -50 100 150 200 Inductor Current IL (mA) Output Voltage IL IOUT=10mA 2.1 2.2 2.3 2.4 2.5 -50 -25 0 25 50 75 100 Temperature Ta (°C) Frequency fosc (MHz) VIN=3.6V 2.1 2.2 2.3 2.4 2.5 2 2.5 3 3.5 4 4.5 5 5.5 Input Voltage VIN (V) Frequency fosc (MHz) -40°C 25°C 85°C

NO.EA-259-170620 10) Soft Start Time vs. Temperature 11) UVLO Detector Threshold / Released Voltage vs. Temperature UVLO Detector Threshold Voltage UVLO Released Voltage 12) CE Input Voltage vs. Temperature CE “H” Input Voltage (VIN = 5.5 V) CE “H” Input Voltage (VIN = 2.3 V) 170 180 190 200 210 220 -50 -25 0 25 50 75 100 Temperature Ta(°C) Soft Start Time tstart (µs) 1.9 2.0 2.1 2.2 2.3 -50 -25 0 25 50 75 100 Temperature Ta(°C) UVLO Voltage V UVLO1 (V) 1.9 2.0 2.1 2.2 2.3 -50 -25 0 25 50 75 100 Temperature Ta(°C) UVLO Voltage V UVLO2 (V) 0.4 0.5 0.6 0.7 0.8 0.9 -50 -25 0 25 50 75 100 Temperature Ta(°C) CE Input Voltage V CE (V) 0.4 0.5 0.6 0.7 0.8 0.9 -50 -25 0 25 50 75 100 Temperature Ta(°C) CE Input Voltage V CE (V)

NO.EA-259-170620 13) LX Current Limit vs. Temperature 14) Nch Tr. ON Resistance vs. Temperature 15) Pch Tr. ON Resistance vs. Temperature 16) Load Transient Response RP504x081x (VIN = 3.6 V) RP504x081x (VIN = 3.6 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “L”PWM/VFM Auto Switching Control 800 850 900 950 1000 -50 -25 0 25 50 75 100 Temperature Ta(°C) LX Current Limit llim (mA) 0.10 0.20 0.30 0.40 0.50 0.60 -50 -25 0 25 50 75 100 Temperature Ta(°C) Nch Tr.ONResistance R ON(Ω) 0.10 0.20 0.30 0.40 0.50 0.60 -50 -25 0 25 50 75 100 Temperature Ta(°C) Pch Tr.ONResistance R ON(Ω) 0.60 0.70 0.80 0.90 1.00 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 0.60 0.70 0.80 0.90 1.00 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA)Output Current 300mA-->1mA Output Voltage

NO.EA-259-170620 RP504x081x (VIN = 3.6 V) RP504x081x (VIN = 3.6 V) MODE = “H” Forced PWM Control MODE = “H” Forced PWM Control RP504x081x (VIN = 3.6 V) RP504x081x (VIN = 3.6 V) RP504x121x (VIN = 3.6 V) RP504x121x (VIN = 3.6 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “L”PWM/VFM Auto Switching Control 0.60 0.70 0.80 0.90 1.00 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 0.60 0.70 0.80 0.90 1.00 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA)Output Current 300mA-->1mA Output Voltage 0.60 0.70 0.80 0.90 1.00 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Voltage Output Current 200mA-->500mA 0.60 0.70 0.80 0.90 1.00 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Current 500mA-->200mA Output Voltage 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.10 1.15 1.20 1.25 1.30 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA

NO.EA-259-170620 RP504x121x (VIN = 3.6 V) RP504x121x (VIN = 3.6 V) MODE = “H” Forced PWM Control MODE = “H” Forced PWM Control RP504x121x (VIN = 3.6 V) RP504x121x (VIN = 3.6 V) RP504x181x (VIN = 3.6 V) RP504x181x (VIN = 3.6 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “L”PWM/VFM Auto Switching Control 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Current 1mA-->300mA Output Voltage 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA)Output Current 300mA-->1mA Output Voltage 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Current 200mA-->500mA Output Voltage 1.10 1.15 1.20 1.25 1.30 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Current 500mA-->200mA Output Voltage 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 1.70 1.75 1.80 1.85 1.90 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA

NO.EA-259-170620 RP504x181x (VIN = 3.6 V) RP504x181x (VIN = 3.6 V) MODE = “H” Forced PWM Control MODE = “H” Forced PWM Control RP504x181x (VIN = 3.6 V) RP504x181x (VIN = 3.6 V) RP504x331x (VIN = 5.0 V) RP504x331x (VIN = 5.0 V) MODE = “L”PWM/VFM Auto Switching Control MODE = “L”PWM/VFM Auto Switching Control 1.65 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Current 1mA-->300mA Output Voltage 1.65 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA)Output Current 300mA-->1mA Output Voltage 1.65 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Current 200mA-->500mA Output Voltage 1.65 1.70 1.75 1.80 1.85 1.90 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Current 500mA-->200mA Output Voltage 3.10 3.20 3.30 3.40 3.50 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 1mA-->300mA 3.10 3.20 3.30 3.40 3.50 -100 0 100 200 300 400 500 600 700 800 900 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Voltage Output Current 300mA-->1mA

NO.EA-259-170620 RP504x331x (VIN = 5.0 V) RP504x331x (VIN = 5.0 V) MODE = “H” Forced PWM Control MODE = “H” Forced PWM Control RP504x331x (VIN = 5.0 V) RP504x331x (VIN = 5.0 V) 17) Mode Switching Waveform RP504x (VOUT = 1.2 V, IOUT = 1 mA) RP504x (VOUT = 1.2 V, IOUT = 1 mA) MODE = “L” --> MODE = “H” MODE = “H" --> MODE = “L” 3.10 3.20 3.30 3.40 3.50 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA) Output Current 1mA-->300mA Output Voltage 3.10 3.20 3.30 3.40 3.50 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 0 200 400 Output Current IOUT (mA)Output Current 300mA-->1mA Output Voltage 3.10 3.20 3.30 3.40 3.50 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Voltage Output Current 200mA-->500mA 3.10 3.20 3.30 3.40 3.50 -10 0 10 20 30 40 50 60 70 80 90 Time t (µs) Output Voltage VOUT (V) 200 400 600 Output Current IOUT (mA) Output Voltage Output Current 500mA-->200mA 1.15 1.20 1.25 1.30 -100 0 100 200 300 400 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V) Output Voltage Mode Input Voltage 1.15 1.20 1.25 1.30 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V) Mode Input Voltage Output Voltage

NO.EA-259-170620 RP504x (VOUT = 1.8 V, IOUT = 1 mA) RP504x (VOUT = 1.8 V, IOUT = 1 mA) MODE = "L" --> MODE = "H" MODE = "H" --> MODE = "L" 1.75 1.80 1.85 1.90 -100 0 100 200 300 400 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V) Mode Input Voltage Output Voltage 1.75 1.80 1.85 1.90 -200 0 200 400 600 800 Time t (µs) Output Voltage VOUT (V) 0 Mode Input Voltage VMODE (V) Mode Input Voltage Output Voltage

POWER DISSIPATION DFN(PL)1216-6 F Ver. A i The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Me asurement Conditions Standard Test Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Double-Sided Board) Board Dimensions 40 mm × 40 mm × 1.6 mm Copper Ratio Top Side: Approx. 50% Bottom Side: Approx. 50% Through-holes φ 0.3 mm × 26 pcs Measu rement Result ( Ta = 25 °C, Tjmax = 125°C) St andard Test Land Pattern Power Dissipation 385 mW Thermal Resistance θjc = 30°C/W IC Mount Area ( mm) Power Dissipation vs. Ambient Temperature Measurement Board Pattern 700 600 500 400 300 200 100 Ambient Temperature (°C) 385 Standard Test Land Pattern Power Dissipation PD (mW) 100 125

PACKAGE DIMENSIONS DFN(PL)1216-6F Ver. A i DFN(PL)1216-6F Package Dimensions (Unit: mm)

POWER DISSIPATION DFN1616-6B Ver. A i The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Standard Test Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Double-Sided Board) Board Dimensions 40 mm × 40 mm × 1.6 mm Copper Ratio Top Side: Approx. 50% Bottom Side: Approx. 50% Through-holes φ 0.5 mm × 32 pcs Measurement Result (Ta = 25°C, Tjmax = 125°C) Standard Test Land Pattern Power Dissipation 640 mW Thermal Resistance θja = (125 − 25°C) / 0.64 W = 156°C/W θjc = 23 °C/W Power Dissipation PD (mW) 700 600 500 400 300 200 100 0 25 50 75 100 125 150 Ambient Temperature (°C) Standard Test Land Pattern 640 Measurement Board Pattern IC Mount Area (mm) Power Dissipation vs. Ambient Temperature Measurement Board Pattern

PACKAGE DIMENSIONS DFN1616-6B Ver. A i INDEX 1.60 1.60 A B 0.05 0.5 0.70±0.05 1.30±0.05 1 3 4 6 0.05 M AB 0.20±0.05

0.05 S S

0.4max. 0.25±0.05 (3X0.15) Bottom View 0.1±0.05 ∗ The tab on the bottom of the package shown by blue circle is a substrate potential (GND). It is recommended that this tab be connected to the ground plane pin on the board but it is possible to leave the tab floating.

POWER DISSIPATION SOT-23-5 Ver. A i The power dissipation of the package is dependent on PCB material, layout, and environmental conditions. The following conditions are used in this measurement. Measurement Conditions Standard Test Land Pattern Environment Mounting on Board (Wind Velocity = 0 m/s) Board Material Glass Cloth Epoxy Plastic (Double-Sided Board) Board Dimensions 40 mm x 40 mm x 1.6 mm Copper Ratio Top Side: Approx.50% Bottom Side: Approx. 50% Through-holes φ 0.5 mm x 44 pcs Measurement Result (Ta = 25°C, Tjmax = 125°C) Standard Test Land Pattern Free Air Power Dissipation 420 mW 250 mW Thermal Resistance θja = (125 − 25°C) / 0.42 W = 238°C/W 400°C/W IC Mount Area (mm) Power Dissipation vs. Ambient Temperature Measurement Board Pattern Power Dissipation (mW) 600 500 400 300 200 100 0 25 50 75 100 125 150 Ambient Temperature (°C) Free Air Standard Test Land Pattern 250 420

PACKAGE DIMENSIONS SOT-23-5 Ver. A i 2.9±0.2 1.9±0.2 (0.95) (0.95) 5 4 1 2 3 1.6-0.1 +0.2 2.8±0.3 0.4±0.1 0.8±0.1 1.1±0.1 0～0.1 0.15-0.05 +0.1 0.2min.

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