전자부품 데이터시트 검색엔진 |
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L6910 데이터시트(PDF) 1 Page - STMicroelectronics |
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L6910 데이터시트(HTML) 1 Page - STMicroelectronics |
1 / 29 page 1/29 L6910 L6910A May 2005 1 FEATURES ■ OPERATING SUPPLY VOLTAGE FROM 5V TO 12V BUSES ■ UP TO 1.3A GATE CURRENT CAPABILITY ■ ADJUSTABLE OUTPUT VOLTAGE ■ N-INVERTING E/A INPUT AVAILABLE ■ 0.9V ±1.5% VOLTAGE REFERENCE ■ VOLTAGE MODE PWM CONTROL ■ VERY FAST LOAD TRANSIENT RESPONSE ■ 0% TO 100% DUTY CYCLE ■ POWER GOOD OUTPUT ■ OVERVOLTAGE PROTECTION ■ HICCUP OVERCURRENT PROTECTION ■ 200kHz INTERNAL OSCILLATOR ■ OSCILLATOR EXTERNALLY ADJUSTABLE FROM 50kHz TO 1MHz ■ SOFT START AND INHIBIT ■ PACKAGES: SO-16 & HTSSOP16 2 APPLICATIONS ■ SUPPLY FOR MEMORIES AND TERMI- NATIONS ■ COMPUTER ADD-ON CARDS ■ LOW VOLTAGE DISTRIBUTED DC-DC ■ MAG-AMP REPLACEMENT 3 DESCRIPTION The device is a pwm controller for high performance dc-dc conversion from 3.3V, 5V and 12V buses. The output voltage is adjustable down to 0.9V; higher voltages can be obtained with an external voltage divider. High peak current gate drivers provide for fast switch- ing to the external power section, and the output current can be in excess of 20A. The device assures protections against load overcur- rent and overvoltage. An internal crowbar is also pro- vided turning on the low side mosfet as long as the over-voltage is detected. In case of over-current de- tection, the soft start capacitor is discharged and the system works in HICCUP mode. ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION Figure 2. Block Diagram MONITOR PROTECTION & REF OSC E/A PWM UGATE BOOT BOOT LGATE PGND GND VFB SS OSC EAREF RT VREF PGOOD VCC OCSET COMP + - - + VO Vin 5V to 12V D03IN1509 Rev. 9 Figure 1. Packages Table 1. Order Codes Part Number Package L6910 SO-16 L6910TR SO-16 in Tape & Reel L6910A HTSSOP16 L6910ATR HTSSOP16 in Tape & Reel SO-16 (Narrow) HTSSOP16 (Exposed Pad) |
유사한 부품 번호 - L6910 |
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유사한 설명 - L6910 |
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