AIC1341 Analog Intergrations Corporation, AIC1341 Datasheet
AIC1341
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AIC1341 Summary of contents
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... TEL: 886-3-5772500 High Performance, Triple-Output, Auto- Tracking Combo Controller n GENERAL DESCRIPTION The AIC1341 combines a synchronous voltage mode PWM controller with two linear controllers as well as the monitoring and protection functions in this chip. The PWM controller regulates the output voltage with a synchronous rectified step- ...
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... PHASE 1 VIN2 7 LGATE 16 GATE3 10 FB3 PGND 15 11 FB1 13 GATE2 8 FB2 6 COMP1 GND SD Typical Triple-Output Application ORDER NUMBER AIC1341CS (SO 16) AIC1341 +5VIN + GND Q1 VOUT1 + Q2 PIN CONFIGURATION PHASE LGATE 16 1 UGATE 15 PGND OCSET VCC COMP1 5 11 ...
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... Rising VCC Threshold Falling VCC Threshold Rising VIN2 Under-Voltage Threshold VIN2 Under-Voltage Hystere- sis Rising V Threshold OCSET1 (V =12V TEST CONDITIONS UGATE, LGATE, GATE2 and GATE3 open V =4.5V OCSET V =4.5V OCSET AIC1341 CC CC =25 C, Unless otherwise J SYMBOL MIN. TYP. MAX VCC 8.6 9.5 10.4 THR VCC 8.2 9.2 10 ...
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... Chip Shutdown Soft Start Threshold (Continued) TEST CONDITIONS 0 < I < 10mA GATE2/3 FB2/3 falling COMP1=10pF VCC=12V, V =11V UGATE VCC=12V, V =1V UGATE VCC=12V, V =11V LGATE VCC=12V, V =1V LGATE AIC1341 SYMBOL MIN. TYP. MAX. F 170 200 230 V 1.245 1.270 1.295 REF2 V 1.250 1.275 1.300 REF3 -2.5 +2.5 ...
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... Pin 10: GATE3: Linear Controller output drive pin. Pin 11: FB3 Pin 12: COMP1 External compensation pin. This Pin 13: FB1 Pin 14: OCSET: Current limit sense pin. Connect AIC1341 turn of the 3.3V supply above the under-voltage threshold. GATE2: Linear Controller output drive pin. This pin can drive either a Dar- lington NPN transistor channel MOSFET ...
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... TYPICAL PERFORMANCE CHARACTERISTICS L GATE Over Load Inductor Current Applied 10A/div Fig.2 Over-Current Operation on Inductor Pin 16: LGATE: Lower N-MOSFET gate drive pin. U GATE Fig.1 The gate drive waveforms FAULT SS AIC1341 to lower N-MOSFET source. U GATE L GATE SS VOUT1 =3.5V VOUT1 =2V VOUT1 =1.3V Fig.3 Soft start initiates PWM Output 6 ...
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... POR 1.3V 70K ERROR AMP 5V SD FB1 (Continued 2mV/div OUT3 Load Step Fig.5 Transient Response of Linear Controller VCC + + 1.3V 200uA + POR + OC1 Q + GATE CONTROL PWM COMP 200KHz OSCILLATOR COMP1 AIC1341 OCSET PHASE VCC UGATE VCC LGATE PGND GND 7 ...
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... DESCRIPTION The AIC1341 is designed for applications with multiple voltage demand. This IC has one PWM controller and two linear controllers. The PWM controller is designed to regulate the voltage ( driving 2 MOSFETs ( OUT1 synchronous rectified buck converter GATE configuration. The voltage is regulated to a level, which is decided by a resistor devide network ...
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... Because minimize the transient load magnitude for high slew rate requires low inductance and resis- tance in circuit board 4) The AIC1341 is best placed over a quiet ground plane area. The GND pin should be connected to the groundside of the output ca- pacitors. Under no circumstances should ...
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... Inductor value and type should be chosen based on output slew rate requirement, output ripple r e- quirement and expected peak current. Inductor value is primarily controlled by the required current response time. The AIC1341 will provide either 0% or 85% duty cycle in response to a load transient. + GND ...
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... MOSFET, since it turns on into near zero voltage. The upper MOSFET has conduction loss and switching loss. The gate charge losses are proportional to the switching frequency and are dissipated by the AIC1341. However, the gate OUT ; charge increases the switching interval, t increase the upper MOSFET switching losses. ...
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... Notes V - The PWM output OUT1 V - The linear controller dominated by FB2, OUT2 V - The linear controller dominated by FB3 OUT3 All the designators mentioned above are refering to the TYPICAL APPLICATION CIRCUIT in pre- should vious page. AIC1341 GATE2 and VIN2 and GATE3 12 ...
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... Circuit 1 Multiple Voltage Power application Circuit AIC1341CS VCC 4 14 OCSET SS UGATE 2 5 0.1 F PHASE 1 VIN2 7 LGATE 16 10 FB3 PGND 15 11 FB1 13 8 33pF FB2 6 COMP1 GND SD 1000pF 1000 F*2 0.1 F 6030L 7 H 1000 6030L 24K 8.2K 91K 1000pF AIC1341 1 H +5VIN GND 5V OUT 13 ...
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... PACKAGE DIMENSIONS l 16 LEAD PLASTIC SO (300 mil) (unit: mm SYMBOL MIN A 2.35 A1 0.10 B 0.33 C 0.23 D 10.10 10.50 E 7.40 e 1.27(TYP) H 10.00 10.65 L 0.40 AIC1341 MAX 2.65 0.30 0.51 0.32 7.60 1.27 14 ...