SPI-8002TW

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60 ICs

■ Recommended Operating Conditions*1 Parameter Input Voltage Range Output Voltage Range Output Current Range Operating Junction Temperature Range Operating Temperature Range Symbol VIN VCC VC/E VO IO Tjop Top Unit V V V V A ■ Absolute Maximum Ratings*1 Unit V V V W °C/W °C/W Symbol VIN VCC VC/E PD Tj Tstg θj-c θj-a Parameter Input Voltage Power Dissipation*2, *3 Junction Temperature Storage Temperature Thermal Resistance (junction to case)*2 Thermal Resistance (junction to ambient air)*2 Ratings SPI-8001TW SPI-8002TW SPI-8003TW 21 40 40 21 40 40 21 40 40 3.0 +135 +150 –40 to +135 –40 to +150 9.0 35.8 ■ Features

• 2 regulators combined in one package
• Output current: 1.5A × 2 (HSOP 16 Pin Surface mount package)
• H igh efficiency: TYP80% (SPI-8001TW), TYP78% (SPI-8002TW)
• V ariable output voltage: 1.0 to 16V (SPI- 8001TW), 1.0 to 24V (SPI-8002TW)
• Built-in reference oscillator (250kHz): Enables to downsize a choke-coil
• Low circuit current consumption: ≤ 1µA (at output OFF)
• High accuracy reference voltage: ±1%
• Built-in foldback-overcurrent and thermal protection circuits
• Built-in ON/OFF circuit (soft start available) – per output *1: Absolute maximum ratings show the destructive limit. No parameter should exceed the ratings in transient or normal operations. *2: When mounted on glass-epoxy board 70cm2 (copper laminate area 30.8cm2). *3: Limited by thermal protection. Ratings SPI-8001TW SPI-8002TW SPI-8003TW VO +3 20 V O +3 38 V O +3 38 4.5 20 4.5 38 4.5 38 20 38 38 11 6 12 41 2 4 1.5 1.5 1.5 –30 +135 –30 +135 –30 +125 –30 +135 –30 +135 –30 +85 *1: Recommended operating conditions show the operating conditions required for the normal circuit function described in the electrical characteristics. These conditions must be followed in actual use. 2-Output, Step-down Switching ModeSPI-8001TW/SPI-8002TW/SPI-8003TW ■ Applications
• Onboard local power supplies
• O A equipment
• For stabilization of the secondary-side output voltage of switching power supplies

SPI-8001TW/SPI-8002TW/SPI-8003TW ■ Electrical Characteristics*1 Unit V mV/ °C kHz mV mV A mA mA µA µA mA mA V V µA V µA Parameter Reference Voltage Temperature Coefficient of Reference Voltage Efficiency 1*2 Efficiency 2*2 Oscillation Frequency Line Regulation Load Regulation Overcurrent Protection Starting Current Quiescent Circuit Current 1 Quiescent Circuit Current 2 Quiescent Circuit Current 3 Quiescent Circuit Current 4 Quiescent Circuit Current 5 Quiescent Circuit Current 6 High Level Voltage C/E Pin Low Level Voltage Inflow Current at High Low Level Voltage SS Pin*3 Inflow Current at Low Symbol VREF Conditions ∆VREF /∆T Conditions Eff1 Conditions Eff2 Conditions fosc Conditions VLINE Conditions VLOAD Conditions IS Conditions IIN Conditions ICC Conditions IIN (off) Conditions ICC (off) Conditions IIN (ssov) Conditions ICC (ssov) Conditions VC/EH Conditions VC/EL Conditions IC/EH Conditions VSSL Conditions ISSL Conditions (Ta=25°C) *1: Electrical characteristics show the characteristic ratings guaranteed when operating the ICs under the measurement conditions described in the above table. *2: Efficiency is calculated from the following formula. η (%) =VO ·IO × 100VIN·IIN *3: Pin 6 and pin 11 are the SS pins. Soft start at power on can be performed with capacitors connected to these pins. The outputs can also be turned ON/OFF with these pins. The outputs are stopped by setting the voltages of these pins to VSSL or lower. SS-pin voltages can be changed with open-collector drive circuits of transistors. When using both the soft-start and ON/OFF functions together, the discharge currents from C4 and C5 flow into the ON/OFF control transistors respectively. Therefore, limit the currents securely to protect the transistors if C4 and C5 capacitances are large. The SS pins are pulled up to the power supply in the ICs, so applying the external voltages are prohibited. Ratings SPI-8001TW SPI-8002TW SPI-8003TW VIN=10V, VO =1V, IO =0.1A V IN=14V, IO =0.1A ±0.1 ±0.1 ±0.1 VIN=10V, VO =1V, IO =0.1A, Ta=–30 to +135°C VIN=14V, IO =0.1A, Ta=–30 to +125°C 80 78 78 VIN=VCC =15V, VO =5V, IO =0.5A, IIN: including ICC VIN= VCC =14V, VO =5V, IO =0.5A, IIN : including ICC 83 81 81 VIN=15V, VO =5V, IO =0.5A, VCC =5V, IIN: excluding ICC VIN=14V, VCC =5V, VO =5V, IO =0.5A, IIN : excluding ICC 250 215 250 285 200 400 VIN=VCC =15V, VO =5V, IO =0.5A VIN=14V, IO =0.1A, COSC =100pF 30 60 30 60 30 60 VIN=VCC =10 to 20V, VO =5V, IO =1A V IN=VCC =9 to 18V, VO =5V, IO =1A 10 40 10 40 10 40 VIN=VCC =15V, VO =5V, IO =0.2 to 1.5A VIN=VCC =14V, VO =5V, IO =0.2 to 1.5A 1.6 1.6 1.6 VIN=VCC =15V V IN=V CC =14V 444 VIN=15V, VCC =5V, IO =0V, VO ≤12V VIN=14V, VCC =5V, IO =0A, VO ≤12V 8.5 8.5 8.5 VCC =15V, IO =0A V CC =14V, IO =0A 111 VIN=15V, VC/E=0V or Open V IN=14V, VC/E=0V or Open 111 VCC =15V, VC/E=0V or Open V IN=14V, VC/E=0V or Open — VIN=14V, VCC =5V, IO =0A, SS1=SS2=0V — 8.5 —V CC =14V, IO =0V, SS1=SS2=0V 22 2 VIN=VCC =15V V IN=V CC =14V 0.8 0.8 0.8 VIN=VCC =15V V IN=V CC =14V 95 95 95 VC/E=20V V C/E=20V 0.5 0.5 0.5 VIN=VCC =15V V IN=V CC =14V 60 80 60 80 60 80 VSSL =0V, VIN=VCC =15V V SSL =0V, VIN=VCC =14V

62 ICs

(Unit : mm)■ External Dimensions (HSOP16) 10.5±0.2 2.5±0.2 2.75MAX 7.5±0.2 2.0+0.2/–0.08 A 10.5±0.3 0.9±0.3 0 to 0.1 0 to 8° 0.25+0.15/–0.05 (2) (4.5) 1+0.1/–0.05 (Heatsink thickness) 1.35±–0.2 (Between the root of leads and back side) 12.2±–0.2 (Gate remains: Not included in dimensions) S 0.10 S Enlarged View of A 16 9 (11) 916 Pin Assignment (SPI-8001TW, SPI-8002TW) q AGND o AGND w VIN1 !0 VREF2 e VCC !1 SS2 r SWout1 !2 DGND2 t DGND1 !3 SWout2 y SS1 !4 C/E u VREF1 !5 VIN2 i N.C !6 N.C ■ Block Diagram SPI-8001TW/SPI-8002TW RESET AGND SS16 AmpBuffer-Amp VREF17 VREFVC/E VCC C/E VIN1 2 TSDfdown SW OUT1 DGND1 DGND2 VIN2 Di1 V VO2 AGND f down cut – PWM AGND 1, 9 C1 C6 VIN Di2 SS211 AmpBuffer-Amp VREF210R6 C5 + SW OUT2 – PWM OSC RESET PRegStart f down cut DrivePWM Logic OCP OCP DrivePWM Logic UVLO Pin Assignment (SPI-8003TW) q AGND o AGND w VIN1 !0 R OSC e VCC !1 VREF2 r SWout1 !2 SS2 t DGND1 !3 DGND2 y SS1 !4 SWout2 u VREF1 !5 C/E i C OSC !6 VIN2 SPI-8003TW AGND SS16 AmpBuffer-Amp VREF17 VREFVC/E VCC

15 C/E

V VO2 AGND f down cut – + PWM AGND 1, 9 C1 C4 VIN Di2 SS212 AmpBuffer-Amp VREF211 SWOUT2 – + PWM OSC RESETPRegStart f down cut DrivePWM Logic OCP OCP DrivePWM Logic UVLO Cosc Rosc Product Mass : Approx.0.86g

SPI-8001TW/SPI-8002TW/SPI-8003TW ■ Typical Connection Diagram VIN GND VC/E VCC VIN1 SWout1 C1C6 SS1 DGND1 VIN2 SS2 DGND2 VREF1 SWout2 VREF2 C/E AGND Ch2 Ch1 1, 9 Di2 IREF2 V02 GND Di1 IREF1 V01 SPI-8000TW Diodes Di1, Di2

• Be sure to use Schottky-barrier diodes for Di1 and Di2. If other diodes like fast recovery diodes are used, IC may be destroyed because of the reverse voltage generated by the recovery voltage or ON voltage. Choke coils L1, L2
• If the winding resistance of the choke coil is too high, the efficiency may drop below the rated value.
• As the overcurrent protection starting current is about 2.0A, take care concerning heat radiation from the choke coil caused by magnetic saturation due to overload or short-circuited load.
• Use a closed-magnetic-path coil to prevent interference between the channels SWout1 and SWout2. Capacitors C1, C2, C3
• As large ripple currents flow through C1, C2 and C3, use high-frequency and low-impedance capacitors suitable for switching mode power supplies. Especially when the impedance of C2 and C3 are high, the switching waveforms may become abnormal at low temperatures. For C2 and C3, do not use capacitors with extremely low equivalent series resistance (ESR) such as OS capacitors or tantalum capacitors, which may cause abnormal oscillation. Resistors R1, R2, R3, R4
• R1, R2, R3 and R4 are resistors for setting output voltages. Set the resistors so that I REF is approx. 1 mA. For example, R1 and R2 can be calculated as shown below. (VO1 –VREF1 )( V O1 –V) V REF1 1 R1= IREF1 = 1×10–3 (Ω), R2=IREF1 = 1×10–3 1(KΩ) To create the optimum operating conditions, place the components as close as possible to each other. C1 : 220 µF/50V C2, C3 : 470 µF/25V C4, C5 : 1 µF C6, C7, C8 : 0.1 µF Note 1: The efficiency depends on the input voltage and the output current. Therefore, obtain the value from the efficiency graph and substitute the percent- age in the formula above. Note 2: Thermal design for D1 must be considered separately. ■ Ta-PD Characteristics VO :Output Voltage VIN :Input Voltage IO :Output Current ηχ :Efficiency (%) VF :D 1 Forward Voltage SJPB-H6···0.45V (IO =1A) PD = VO ·IO 100 – VF·IO 1– VO ηχ VIN –25 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 02 5 5 0 7 5 100 125 135 150 Power Dissipation PD (W) Ambient Temperature Ta (°C) (Copper Laminate Area)θj-a =.. VIN GND VC/F VCC VIN1 SWout1 C1C4 C9 R7 SS1 DGND1 VIN2 SS2 DGND2 VREF1 SWout2 VREF2 C/E AGND C ORC RCSC Ch2 Ch1 1, 9 10 Di2 IREF2 VC2 GND Di1 IREF1 VC1 SPI-8003TW R5, R6 : 1k Ω L1, L2 : 47 µH Di1, Di2 : SJPB-H6 (Sanken) C1 : 220 µF/50V C2, C3 : 470 µF/25V C4 : 1 µF/50V C5, C6 : 1 µF/10V C7, C8 : 0.1 µF/50V C9 : 100pF/10V L1, L2 : 47 µH R2, R4 : 1k Ω R5, R6 : 1k Ω Di1, Di2 : SJPB-H6 (Sanken)