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L6910TR 数据表(PDF) 1 Page - STMicroelectronics |
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L6910TR 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 21 page  1/21 L6910 L6910A July 2003 FEATURE s OPERATING SUPPLY VOLTAGE FROM 5V TO 12V BUSES s UP TO 1.3A GATE CURRENT CAPABILITY s ADJUSTABLE OUTPUT VOLTAGE s N-INVERTING E/A INPUT AVAILABLE s 0.9V ±1.5% VOLTAGE REFERENCE s VOLTAGE MODE PWM CONTROL s VERY FAST LOAD TRANSIENT RESPONSE s 0% TO 100% DUTY CYCLE s POWER GOOD OUTPUT s OVERVOLTAGE PROTECTION s HICCUP OVERCURRENT PROTECTION s 200kHz INTERNAL OSCILLATOR s OSCILLATOR EXTERNALLY ADJUSTABLE FROM 50kHz TO 1MHz s SOFT START AND INHIBIT s PACKAGES: SO-16 & HTSSOP16 APPLICATIONS s SUPPLY FOR MEMORIES AND TERMI- NATIONS s COMPUTER ADD-ON CARDS s LOW VOLTAGE DISTRIBUTED DC-DC s MAG-AMP REPLACEMENT 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 di- vider. 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. SO-16 (Narrow) HTSSOP16 (Exposed Pad) ORDERING NUMBERS: L6910 (SO-16) L6910A (HTSSOP16) L6910TR (Tape & Reel) L6910ATR (Tape & Reel) ADJUSTABLE STEP DOWN CONTROLLER WITH SYNCHRONOUS RECTIFICATION BLOCK DIAGRAM L6910 PGND PHASE GND VFB LGATE BOOT UGATE VCC OCSET Vin 5V to12V Vo PGOOD COMP SS Monitor Protection and Ref OSC + - + - E/A PWM EAREF OSC VREF 300k RT |
类似零件编号 - L6910TR |
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类似说明 - L6910TR |
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