AN33014UA PANASONIC | Alldatasheet
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Notification about the transfer of the semiconductor business The semiconductor business of Panasonic Corporation was transferred on September 1, 2020 to Nuvoton Technology Corporation (hereinafter referred to as "Nuvoton"). Accordingly, Panasonic Semiconductor Solutions Co., Ltd. became under the umbrella of the Nuvoton Group, with the new name of Nuvoton Technology Corporation Japan (hereinafter referred to as "NTCJ"). In accordance with this transfer, semiconductor products will be handled as NTCJ-made products after September 1, 2020. However, such products will be continuously sold through Panasonic Corporation. Publisher of this Document is NTCJ. If you would find description “Panasonic” or “Panasonic semiconductor solutions”, please replace it with NTCJ. ※ Except below description page “Request for your special attention and precautions in using the technical information and semiconductors described in this book” Nuvoton Technology Corporation Japan
1-channel DC-DC Step Down Regulator Circuit that em ploys Voltage Mode Switching Control System Current Feedback Function compensates output vol tage drop due to external USB cable loss Internal reference voltage is within 1.5% accuracy Input Voltage Range : PVCC , VCC: 5 V ~ 25 V Adjustable Switching Frequency with external Resistor : 200 kHz ~ 1 MHz Adjustable Output Voltage Range with external Resistor : 1.2 V ~ 9 V Standby mode consumes less than 1 µA current Output over voltage protection function Output ground short protection function Over current protection with adjustable threshold. Thermal Shut Down (TSD) Under voltage lockout function (UVLO) Thermal Shut Down function Adjustable soft-start function SSOP024-P-0300F ( Size : 8.1 mm X 7.8 mm, 0.65 mm pitch ), 24pin Plastic Shrink Small Outline Package (SSOP T ype) High Input Voltage Power Systems for USB such as ・Car-Audio system ・Car-Navigation system ・OA Equipment ・Home Appliances etc. SIMPLIFIED APPLICATION
APPLICATIONS
VIN = 5 to 25 V, 1-channel DC-DC Step down Regulator integrated N-channel Power MOSFET for USB AN33014UA is 1-channel DC-DC Step down Regulator integrated N-channel Power MOSFET and employs the voltage mode switching control system. This IC can be operated with wide input voltage range and is build in several protection functions, so this IC can provide high reliability power supply system. Since it is possible to use up to 1 MHz switching frequency and it is unnecessary to add external parts for High Side Switch, this IC realizes downsizing of set and reducing in the number of external parts. For USB applications, this IC can controlled USB supplied voltage level with external resistor for USB load current monitor (Current Feedback Function), and it can provide suitable power supply system for external USB with no voltage drop due to USB cable loss. Maximum current is 1.5 A. Notes) This application circuit is an example. The operation of mass production set is not guaranteed. You should perform enough evaluation and verification on the design of mass production set. You are fully responsible for the incorporation of the above application circuit and information in the design of your equipment. Condition ) Vin = 6 , 12 , 25 V, Vout = 5 V, Lo = 10 µH, Co = 22 µF, Frequency = 490 kHz RSENSE=50m 100 0 300 600 900 1200 1500 Iload (mA) Efficiency (%) VCC=6V VCC=12V VCC=25V EFFICIENCY CURVE DC-DCOUT SS EN BT LX VREG AN33014UA SGND PVIN PVCC1/2VCC PGND FLAG VREG or EXT Power BTVCC RSIN RSO RT RADJ FB COMP 27pF 7.5kΩ 2.2nF 7.5kΩ 30kΩ 30Ω @100MHz 130kΩ 0.1μF 1.0μF 22μF 0.1μF 50mΩ 30kΩ 0.1μF220Ω 3300pF 10μH 1.5kΩ470pF Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
PACKAGE j-a j-C PD ( Ta = 25 C) PD ( Ta = 85 C) Notes
24 Pin Plastic Shrink Small Outline Package
(SSOP Type) 135.1 C / W 11.8 C / W 0.925 W 0.481 W *1 ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Unit Notes Supply voltage Vcc 40 V *1 Operating free-air temperature Topr – 40 to + 85 C *2 Operating junction temperature Tj – 40 to + 150 C *2 Storage temperature T stg – 55 to + 150 C *2 Input Voltage Range VBT -0.3 to (Vcc+VREG)V *1 V RSIN,VRSO -0.3 to 10 V *1 VEN -0.3 to (Vcc+0.3) V *1 V FB,VBTVCC,VSYNC -0.3 to 5.5 V *1 Output Voltage Range VFLAG -0.3 to 5.5 V *1 VLX – 0.3 to ( Vcc + 0.3 ) V *1 ESD V HBM (Human Body Model) 2 kV — VMM (Machine Model) 200 V — POWER DISSIPATION RATING Note). For the actual usage, please refer to the PD-Ta characteristics diagram in the package specification, follow the power s upply voltage, load and ambient temperature conditions to ensure t hat there is enough margin and the thermal design does not exceed the allowable value. *1:Glass Epoxy Substrate(4 Layers) [Glass-Epoxy: 50 X 50 X 0.8t(mm)] CAUTION Although this has limited built-in ESD protection circuit, but permanent damage may occur on it. Therefore, proper ESD precautions are recommended to avoid electrostatic damage to the MOS gates Notes) Do not apply external currents and voltages to any pin not specifically mentioned. This product may sustain permanent damage if subjected to c onditions higher than the above stated absolute maximum rating. This rating is the maximum rating and device operating at this range is not guaranteeable as it is higher than our stated recommended operating range. When subjected under the absolute maximum rating for a long time, the reliability of the product may be affected. Vcc is voltage for VCC, PVCC1 and PVCC2. VCC = PVCC1 = PVCC2. *1:The values under the condition not exceeding the above absolute maximum ratings and the power dissipation. *2:Except for the power dissipation, operating ambient temperature, and storage temperature, all ratings are for Ta = 25 C. *3:( Vcc + VREG ) V must not be exceeded 40 V *4:( Vcc + 0.3 ) V must not be exceeded 40 V Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
RECOMMENDED OPERATING CONDITIONS Parameter Pin Name Min. Typ. Max. Unit Notes Supply voltage range VCC 51 2 2 5 V * 1PVCC1 PVCC2 Input Voltage Range VBT –0 . 3 — Vcc + VREG V *1 VRSIN –0 . 3 — 1 0 V * 1 VRSO VEN – 0.3 — Vcc + 0.3 V *1 VFB – 0.3 — 5.5 V *1VBTVCC VSYNC Output Voltage Range VLX – 0.3 — Vcc + 0.3 V *1 VFLAG – 0.3 — 5.5 V *1 Note) Do not apply external currents and volt ages to any pin not specifically mentioned. Voltage values, unless otherwise specified, are with respect to GND. GND is voltage for SGND, PGND. SGND = PGND Vcc is voltage for VCC, PVCC1 and PVCC2. VCC = PVCC1 = PVCC2. *1 : The values under the condition not exceeding the abov e absolute maximum ratings and the power dissipation. *2 : ( Vcc + VREG ) V must not be exceeded 40 V *3 : ( Vcc + 0.3 ) V must not be exceeded 40 V Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
Parameter Symbol Condition Limits Unit NoteMin Typ Max Current Consumption Quiescent current ICQ No switching FB = 1.1 V EN = High (3.3 V) —1 . 0 1 . 7 m A — Standby current I STBY EN = Low — 0.01 1 A — BGR Feedback voltage VREF FB connected to COMP with gain of 1.5 times 0.985 1.0 1.015 V — Enable (EN) Low input threshold V IL1 —— — 0 .4 V — High input threshold VIH1 —2 .0 — — V — EN terminal input current VIC1 EN = 3.3 V — 33 70 A — SYNCHRONIZATION (SYNC) Low input threshold VIL2 —— — 0 .4 V — High input threshold VIH2 —2 .0 — — V — Oscillator Oscillator frequency FOUT1 RT = 130 k 440 490 540 kHz — Oscillator frequency range F OUT2 200 — 1000 kHz — External sync frequency range F SYNC RT = 130 k FOUT1 = 490 kHz 545 — 730 kHz — Over-current protection Over-current threshold voltage V OCP (VCC_S-VRS) 72 90 108 mV *1 Over-voltage protection Over-voltage threshold voltage for VFB VOVP1 For FB 1.14 1.22 1.30 V — Over-voltage threshold voltage for VCC V OVP2 For VCC 30 34 38 V — Internal regulator Internal regulator output voltage V REG CREG = 1 F 4.5 5.0 5.3 V — GND short protection Short detection voltage V SCP monitor FB 0.15 0.3 0.45 V — ELECRTRICAL CHARACTERISTICS Co = 22 µF, Lo= 10 µH, VOUT Setting = 5.0 V, VCC = 12 V, RT = 130 k, RADJ = 30 k, Rsense = 50 m, RS2 : MPZ1608S300A, Ta = 25 C 2 C unless otherwise noted. Note) *1 : This parameter is tested with DC measurement. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
Parameter Symbol Condition Limits Unit NoteMin Typ Max Current Feedback Current feedback output voltage 1 V CFB1 Monitor RADJ At RSIN-RSO = 32.5 mV No switching 75 130 185 mV *1 Current feedback output voltage 2 V CFB2 Monitor RADJ At RSIN-RSO = 65 mV No switching 205 260 315 mV *1 Current feedback factor V CFBF Calculation item (VCFB2 -V CFB1) / {4 x (65 mV – 32.5 mV)} 0.96 1 1.04 — — Under voltage Lock out Under Voltage Lock Out threshold voltage VUVLO Monitor VCC No switching 3.5 3.9 4.3 V — ELECRTRICAL CHARACTERISTICS (Continued) Co = 22 µF, Lo= 10 µH, VOUT Setting = 5.0 V, VCC = 12 V, RT = 130 k, RADJ = 30 k, Rsense = 50 m, Ta = 25 C 2 C unless otherwise noted. Note) *1 : This parameter is tested with DC measurement. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
Pin No. Pin name Type Description 1 N.C. — No connection
2 RSO Input Connection to current sensing port
3 N.C. — No connection
4 PVCC1 Power
Supply Power supply pin for internal driver
5 PVCC2 Power
Supply Power supply pin for internal driver 6V C C Power Supply Power supply pin 7 N.C. — No connection
8 RSIN Input Connection to current sensing port
9 VREG Output Connect to an external capacitor for internal regulator
10 SGND Ground Ground pin
11 COMP Output Error amplifier output
12 FB Input Error amplifier negative input
13 SS Output Soft-start capacitor connection pin
14 RT Output Connect to an external resistor for adjustment of oscillation frequency
15 CT Output Low Pass filter function pin for PLL
16 EN Input Enable pin
17 SYNC Input External clock input for adjustment of oscillation frequency
18 RADJ Output Connect to an external resistor for adjustment of current feedback
19 FLAG Output Error flag output pin
20 TL Output Connect to an external capacitor for adjustment of over-current detection time
21 BTVCC Input Boot strap input pin
22 BT Input Connect to an external capacitor for Boot strap
23 PGND Ground Power ground pin
24 LX Output Connect to an external inductor and schottky diode
Notes) Concerning detail about pin description, please re fer to OPERATION and APPLICATION INFORMATION section. Top View NC. RSO NC. PVCC1 PVCC2 VCC NC. RSIN VREG SGND COMP FB LX PGND BT BTVCC TL FLAG RADJ SYNC EN CT RT SS PIN CONFIGURATION Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
Notes) This block diagram is for explaining functions. Part of the block diagram may be omitted, or it may be simplified. OSC SS ERAMP Current feed back OCPCNT EN FB COMP SGND 7 N.C. VREG
18 RADJ
1 N.C. TL 20 CT 3 N.C. BTVCC PLL
4 PVCC1
2 RSO
(BGR)TSD UVLO VINT OVP (VCC) PGND Timer Latch
8 RSIN
5 PVCC2
Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
AN33014UA consists of one channel and it can be turned ON and OFF by using the EN pin. EN > 2.0 V : Enabled EN < 0.4 V : Disabled 1) Power ON Sequence : – VCC rises to a desired voltage level. (A 10 s rise time or more is recommended to control and limit any abnormal current flow via the power transistor when VCC is rising.) – Apply a voltage level of 2.0 V or higher at EN pin after VCC is steady, and the DC-DC will begin to operate. (It is possible to connect the EN pin to VCC through a resistor, and, in that case, when VCC rises, DC-DC will begin to operate.) – When VREG voltage reaches 4.3 V and above, and after a delay time (charging time of the soft start capacitor) decided by an external capacitor, the DC-DC will start to operate. Power OFF Sequence : – To turn OFF the DC-DC output, apply a voltage of 0.4 V or lower to EN pin. – VOUT will drop after EN pin becomes Low. (The discharge time is dependent on the applied load current and the feedback resistance connected at the output.) The DC-DC will turn OFF if the VCC level becomes low even before EN pin becomes low. The above scenario occurs when the VREG voltage decreases to 4.0 V or less. (However, the DC-DC output voltage will also decrease with VCC when the VCC level drops below a certain minimum level required to maintain the output voltage level.) 3) Points to take note of when re-starting the DC-DC : – Please allow a waiting time of 10 ms or more for the discharge time of the soft start capacitor when star ting up the DC-DC again after turning it OFF. The output voltage might overshoot without the soft start function working properly if the DC-DC is re-started immediately after it is turned OFF. 4) Points to take note of when shut down : – Please turn OFF the DC-DC by applying a Low voltage of EN pin. 5) Points to take note of pin connection : – VREG is utilized for internal circuits. do not use it as power supply for other device. – Please take note on the placement of external parts of RT pin and CT pin as these are sensitive pin that are susceptible to noise effect such as LX pin. OPERATION 1. Power ON/OFF sequence Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
ON/OFF operation sequence by EN pin control. Note) All values given in the above figure are typical values. 2. Start / Stop Control Timing Chart Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. OPERATION (Continued) Figure ： Power ON/OFF sequence by EN VCC EN VOUT VREG SS t 4.3 V 2.3 V 10 s or more Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
ON/OFF operation sequence by VCC pin control (EN pin is connected to VCC). Note) All values given in the above figure are typical values. Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. OPERATION (Continued) Figure ： Power ON/OFF sequence by VCC/EN VCC EN VOUT VREG SS t 4.3 V 2.3 V 4.0 V 2.0 V 10 s or more 2. Start / Stop Control Timing Chart Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
The output voltage of AN33014UA is set with the external feedback resistance divider arranged between the terminal FB and GND between the DC-DC output and the terminal FB. The output voltage is decided depending on the following equation. OPERATION (Continued) 3. Output voltage setting Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Rb RaVout 1 0 . 1 MinDuty is decided by the minimum ON time. The minimum ON time, Ton (min), is the time that this IC can turn on the high side switch. This is decided by the gate capacitance of the high side switch and the internal timing delay. The following attention is necessary because in applications where the Input/Output voltage difference is great, and the switching frequency is high, there is a possibility to reach the limiting value of the minimum ON time. The minimum ON time, Ton (min), is about 200ns (max). This IC has the function of MaxDuty, which will not exceed a certain definite value for safety reasons in case of abnormal circumstances. The following attention is necessary because in applications where the Input/Output voltage difference is close, and the switching frequency is high, there is a possibility to reach the limiting value of the minimum OFF time. The minimum OFF time, Toff (min), is about 200ns (max). 4. Min/Max Duty Operation Note) The characteristics listed below are reference values derived from the design of the IC and are not guarant eed. F Vin VoutTon 1(min) F Vin VoutToff 1) 1 ( (min) *) F： Switching frequency When operating near the Min/Max limited duty, the ripple voltage and the inductor current ripple increases even if the output voltage is stabilized. It is recommended to use on the condition when the turn on switching time and turn off switching time are 200ns or more. *) Please take note of the output voltage setting when the switching frequency is high. VOUT Ra VFB (1.0 V) Rb Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
0 50 100 150 200 250 300 350 400 RT [kΩ] OSC Frequency [kHz] The switching frequency of the built-in oscillator circuit can be set from 200 kHz to 1000 kHz, determined by the resistance of the terminal RT, set by external resistance. The setting accuracy of the frequency is approximately 10%. The equation and the corresponding table are described as follows. OPERATION (Continued) 5. Oscillation Frequency Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. RT [kΩ] OSC Frequency (kHz) RT [k Ω] OSC Frequency (kHz) 56 1015 150 430 62 934 160 406 68 864 180 364 75 796 200 330 82 738 220 302 91 674 240 278 100 620 270 249 110 569 300 225 120 527 330 206 130 490 360 190 F igure ： switching frequency vs external resistance Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
Over-current protection function (OCP) restrain output current level when IC detect that DC-DC output current is higher than setting level. It turns off the Power MOS in IC when the voltage difference of external resistance Rsense exceeds 90mV(Typ.) so as to stop the supply to DC-DC output. Detection current Isense can be calculated as: Isense = 90mV / Rsense For safety reason, OCP function is necessary. Please placed sense resistor (≥ 39mΩ) between RSIN and RSO as indicated in above figure. Figure : Over-Current Protection circuit block diagram Comp ＲＳＩＮ VOUT OCP Comparator LOGIC Power MOS VCC ＲＳＯ Rsense To Timer Latch OPERATION (Continued) 6. Over-Current Protection Figure : Method of detection of Over-Current Protection function EN VOUT IOUT TL FLAG Setting current OCP detect 1.2V *)In case FALG terminal is pulled-up to VREG. [1] [2] [1].DC-DC continue to ON and OFF when OCP detect. It restrain average level of DC-DC output voltage and DC-DC output current. [2].FLAG output become low when you keep abnormal condition longer than setting time of Timer Latch function. For safety reason, please disable DC-DC by EN control when FLAG output become low. Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
The following expression shows the relation between Current Feedback Adjustment Resistance RRADJ and Sense Resistance RSENSE and Impedance Rcable (ex. External connection cables). The following expression shows the relation between Voltage V_USB and RRADJ. With respect to above equations, 1) IOUT is current flowing through RSENSE. 2) 1.0 [V] is the internal reference voltage (VREF) of IC. OPERATION (Continued) 7. Current Feedback function Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Figure ： The diagram of current feed back function RSO RSIN Ra RSENSE Rb DC-DC CONVERTOR ERAMP RRADJ FB RADJ Rcable V_USB LX Vout CFB block IOUT VREF = 1.0 V ※ This function is suitable at below conditions: output voltage range from 3 V to 7 V, Rcable resistance is equal or less than 1.0 Ω . The voltage of RSIN pin and RSO pin might be higher than its absolute voltage when Rcable is over than 1.0Ω. In case ther e is a change of Rcable’s impedance to more than 1.0 Ω by external factor such as a heat, drop in V_USB voltage is to be expected. Referring to formula V_USB* above, when Rcable increased and Radj remain co nstant, V_USB will drop. As a safety measure, a sensing resistor must be inserted between RSIN pin & RSO pin to enable the over-current pr otection function. Sensing resistor value of more than 39 mΩis recommended. ΩRcable RSENSERaRADJ 4R V IOUTRcableR IOUTRSENSE RbRa RADJ 4 11V_USB Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
The following expression shows the relation between IOUT and voltage drop V of Impedance Rcable (ex. External connection cables). The following expression shows the relation between above formula and Voltage V_USB and RRADJ. At this point, The following graph shows the expression of V = Vout – V_USB against IOUT. The condition is Ra = 31.2 k Ω, Rb = 7.5 k Ω, RSENSE = 56 m Ω. OPERATION (Continued) 7. Current Feedback function (continued) Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Figure ： = Vout – V_USB vs IOUT 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 0 200 400 600 800 1000 1200 1400 IOUT [mA] ⊿V(Vout-V_USB) [V] RRADJ=10kΩ RRADJ=20kΩ RRADJ=30kΩ RRADJ=40kΩ RRADJ=50kΩ V VR IOUTRSENSE Rb RADJ 0 . 10 . 1 4 1Ra 1 Vout IOUTRcable V ⊿ V USB V VR IOUTRSENSE Rb RADJ _ 0 . 10 . 1 4 1Ra 1 V Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
As a safety measure, a sensing resistor must be inserted between RSIN pin & RSO pin to enable the over-current protection function. Sensing resistor value of more than 39 mis recommended. If sensing resistor is set at less than 39 m, the capacitor at TL pin should be as small as possible or open to minimize reaction time of Timer Latch block. Please consider the implementation of full evaluation and verification for this setting. Take notice the power dissipation of Sensing resistor. If the impedance of ferrite beads is 30 (at 100MHz), over current detection level (ISENSE) is shown below. ISENSE(typ)=90mV/RSENSE（90mV：detection level of OCP (typ)） If the impedance of ferrite beads is not 30(at 100MHz), over current detection level (ISENSE) is shown below. If the impedance of ferrite beads is not 30(at 100MHz), please adjust RSENSE for setting to desired ISENSE by above formula. OPERATION (Continued) 8. Over current protection setting Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Stop this product by forcing EN pin to Low when detect OCP or SCP condition by FLAG pin. In situation when RSIN RSO are less than 1.1V, do note that only SCP detection is active. When FB is equal or lower than 0.3 V, short current detection is triggered, FLAG pin will be pull to Low state. The response timing is determined by TL pin capacitor value CTL (The response timing = CTL / 2A ×1.2V ). Note that the pull down current drivability of FLAG pin is 1.2 mA. Adjusting of FLAG response time in event of “over current” or “short current” condition is make possible by changing the capacitance of TL pin. In the event of over current detection, FLAG pin will be pull to Low state. Once FLAG is pull to Low state, it will remained at Low state until IC is reset through EN pin. 9. FLAG function after Over current / Short current detection Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. R : Impedance of ferrite beads ( at 100MHz) x : 90mV/RSENSE When the LSI internal temperature becomes more than about 165, TSD operates and DC-DC turns off. 10. Thermal Shut Down (TSD) Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
This IC includes a soft start function whereby start-up time can be set to desired timing by adjusting the SS terminal capacitor (Css). By adjusting the soft-start time, rush current from the Power supply terminal can be limited and the start-up timing of the output voltage can be changed. The timing chart and the method of selecting the external capacitor value is shown in below. SSC2.2μ 1.5(s) Time Start - Soft EN DC-DC output SS t 0.8V Soft start time 2.3V Figure ： Soft start operation timing chart Figure ： Soft Start Time vs Css Value ( External Capacitor ) Equation to set soft start time by Css ： OPERATION (Continued) 11. Soft Start Timing and Setting Note) The characteristics listed below are reference values derived from the design of the IC and are not guaranteed. When this IC is used for power supply of communication with external equipment, the communication may not possible during the soft-start period. Depending on the type of external equipment connected, in some cases, when the DC-DC is turned on, even though the soft start maybe halfway through, the voltage level is high enough to enable the communication to start. In such cases, the micro-controller may not recognize the equipment normally and therefore it is required to set the micro-controller to access all possible equipment after the above soft-start setting time. ソフトスタート時間 vs 外付けコンデンサ（Css） 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0.2 0 2 04 06 08 0 1 0 0 ソフトスタート時間[ms] Css[uF] Soft Start Time[ms] Soft Start Time vs Css Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
Figure : Application circuit Figure : Top Layer with silk screen ( Top View ) with Evaluation board Figure : Bottom Layer with silk screen ( Bottom View ) with Evaluation board SS Ext.CLK EN FB COMP SGND 7 N.C. VREG 1 N.C. TL 20 CT Pull-up 3 N.C. BTVCC Notes) This application circuit and layout is an example. The operation of mass production set is not guaranteed. You should perform enough evaluation and verification on the design of mass production set. You are fully responsible for the incorporation of the above application circuit and information in the design of your equipment. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
APPLICATIONS INFORMATION ( Continued ) Figure : Recommended component Reference Part Name Value Maker Description C-BT,C-CT, C-SS,C-TL GCM188R11C104KA01J 0.1µF Murata Setting Capacitor C1 GCM1882C1H222JA01J 2.2nF Murata Compensation Capacitor C2 GCM1882C1H471JA01J 470pF Murata Compensation Capacitor C3 GCM1882C1H270JA01J 27pF Murata Compensation Capacitor CVREG GCM188R71C105KA49J 1µF Murata VREG Capacitor CVCC3,CVCC4, CVCC5 CKG57NX7R1H226MT 22µF TDK Input Capacitor C-VOUT1 TMK325C7226MM-T 22µF TAI YO,YUDEN Output Capacitor C-VOUT2 GCM188R11C104KA01J 0.1µ F Murata Output Capacitor L1 CDRH8D43-100NC 10µH SUMIDA Inductor D1 DB24416 - Panasonic Schottky Diode R1 ERA3AEB752V R=7.5k Panasonic Compensation & Feedback Resistor R2 ERA3AEB152V R=1.5k Panasonic Compensation & Feedback Resistor RA-1 ERA3AEB303V R=30k Panasonic Compensation & Feedback Resistor RB-1 ERA3AEB752V R=7.5k Panasonic Compensation & Feedback Resistor R-RADJ ERA3AEB303V R=30k Panasonic Current Feedback Adjustment Resistor RFLAG ERA3AEB204V R=200k Panasonic Pull-up Resistor R-RT2 ERA3AEB134V R=130k Panasonic OSC Setting Resistor (Fsw=490kHz) RSENSE ERJ6BWFR050V R=50m Panasonic Output Current Sense Resistor RA-2,RB-2,R7, R8,R9,RBTVCC ERJ3GEY0R00V R=0 Panasonic - CS1 GCM1882C1H332JA01J 3300pF Murata Snubber Circuit RS1 ERA3AEB221V R=220 Panasonic Snubber Circuit RS2 MPZ1608S300A - TDK Ferrite Beads Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
PACKAGE INFORMATION ( Reference Data ) Outline Drawing Unit : mm Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08
- When using the LSI for new models, verify the safety including the long-term reliability for each product. 2. When the application system is designed by using this LSI, please confirm the notes in this book. Pl ease read the notes to descriptions and the usage notes in the book. 3. This LSI is intended to be used for general electronic equipment. Consult our sales staff in advance for information on the following applications: Special applications in which exceptional quality and reliability are required, or if the failure or malfunction of this LSI may directly jeopardize life or harm the human bod Any applications other than the standard applications intended. (1) Space appliance (such as artificial satellite, and rocket) (2) T raffic control equipment (such as for airplane, train, and ship) (3) Medical equipment for life support (4) Subm arine transponder (5) C ontrol equipment for power plant (6) Disaster prevention and security device (7) W eapon (8) Other s : Applications of which reliability equivalent to (1) to (7) is required Our company shall not be held responsible for any damage incurred as a result of or in connection with the LSI being used for any special application, unless our company agrees to the use of such special application. Please use this product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, i ncluding without limitation, the EU RoHS Directive. Our company shall not be held responsible for any dam age i ncurred as a result of our LSI being used by our customers, not complying with the applicable laws and regulations. Pay attention to the direction of LSI. When mounting it in the wrong direction onto the PCB (printed-circuit-board), it migh t emit s moke or ignite. Pay attention in the PCB (printed-circuit-board) pattern layout in order to prevent damage due to short circuit between pins . In addi tion, refer to the Pin Description for the pin configuration. Perform a visual inspection on the PCB before applying power, otherwise damage might happen due to problems such as a sol der-bridge between the pins of the semiconductor device. Also, perform a full technical verification on the assembly quality , because the same damage possibly can happen due to conductive subs tances, such as solder ball, that adhere to the LSI dur ing transportation. Take notice in the use of this product that it might be damaged or occasionally emit smoke when an abnormal state occur s such as output pin-VCC short (Power supply fault), output pin-GND short (Ground fault), or output-to-output-pin short ( load shor t). Safety measures such as an installation of fuses are recommended because the extent of the above-mentione d dam age and smoke emission will depend on the current capability of the power supply.. The protection circuit is for maintaining safety against abnormal operation. Therefore, the protection circuit should not work dur ing normal operation. Especially for the thermal protection circuit, if the area of safe operation or the absolute maximum rating is momentarily exceeded due to output pin to VCC short (Power supply fault), or output pin to GND short (Ground fault), the LSI m ight be dam aged before the thermal protection circuit could operate. 10. Unless specified in the product specifications, make sure that negative voltage or excessive voltage are not applied to th e pins because the device might be damaged, which could happen due to negative voltage or excessive voltage generate d dur ing the ON and OFF timing when the inductive load of a motor coil or actuator coils of optical pick-up is being driven. 11. Product which has specified ASO (Area of Safe Operation) should be operated in ASO 12. Verify the risks which might be caused by the malfunctions of external components. Doc No. TA4-EA-06038 Revision. Established 2011-11-18 Revised 2013-11-08