0
ACTIVE
Rating |
Catalog |
Iout (max) (A) |
10 |
Vin (max) (V) |
5.5 |
Vin (min) (V) |
3 |
Vout (max) (V) |
4.6 |
Vout (min) (V) |
0.8 |
Control mode |
Voltage mode |
Features |
Enable pin, Prebias startup, Tracking |
Duty cycle (max) (%) |
91 |
Iq (typ) (A) |
0.0018 |
Number of phases |
1 |
Operating temperature range (°C) |
-40 to 125 |
VSSOP (DGS)-10-14.7 mm² 3 x 4.9
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The LM3743 is a DC-DC voltage mode PWM buck controller featuring synchronous rectification at 300 kHz or 1 MHz. It can deliver current as high as 20A and step down from an input voltage between 3V and 5.5V down to a minimum output voltage of 0.8V, with a ±1.75% internal reference accuracy. The LM3743 provides a set of comprehensive fault protection features such as high-side current limit, output under-voltage protection, and low-side current limit. When any of these fault protection features are engaged, it enters a hiccup protection mode which is suitable for high reliability systems such as rack mounted servers and telecom base station subsystems. The LM3743 also employs a proprietary monolithic glitch free pre-bias start-up method suited for FPGA and ASIC logic devices. An external programmable soft-start allows for tracking and timing flexibility. The driver features 1.6Ω of pull-up resistance and 1Ω of pull-down drive resistance for high power density and very efficient power processing.
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