LM76003RNPRG4.B中文资料德州仪器数据手册PDF规格书

1 Features

1• Integrated synchronous rectification

• Input voltage 3.5 V to 60 V (65 V maximum)

• Output current:

– LM76002: 2.5 A

– LM76003: 3.5 A

• Output voltage 1 V to 95% VIN

• 15-μA Quiescent current in regulation

• Wide voltage conversion range

– tON-MIN = 65 ns (typical)

– tOFF-MIN = 95 ns (typical)

• System-level features

– Synchronization to external clock

– Power-good flag

– Precision enable

– Adjustable soft-start (6.3 ms default)

– Voltage tracking capability

• Pin-selectable FPWM operation

• Adjustable frequency range: 300 kHz to 2.2 MHz

• High-efficiency at light-load architecture (PFM)

• Protection features

– Cycle-by-cycle current limit

– Short-circuit protection with hiccup mode

– Overtemperature thermal shutdown protection

• Create a custom design using the

LM76002/LM76003 with the WEBENCH® Power

Designer

2 Applications

• Telecommunications infrastructure

• Asset and fleet management systems

• Video surveillance

• Programmable logic controllers

3 Description

The LM76002/LM76003 regulator is an easy-to-use

synchronous step-down DC-DC converter capable of

driving up to 2.5 A (LM76002) or 3.5 A (LM76003) of

load current from an input up to 60 V. The

LM76002/LM76003 provides exceptional efficiency

and output accuracy in a very small solution size.

Peak current-mode control is employed. Additional

features such as adjustable switching frequency,

synchronization, FPWM option, power-good flag,

precision enable, adjustable soft start, and tracking

provide both flexible and easy-to-use solutions for a

wide range of applications. Automatic frequency

foldback at light load and optional external bias

improve efficiency. This device requires few external

components and has a pinout designed for simple

PCB layout with best-in-class EMI (CISPR22) and

thermal performance. Protection features include

input undervoltage lockout, thermal shutdown, cycleby-

cycle current limit, and short-circuit protection. The

LM76002/LM76003 device is available in the WQFN

30-pin leadless package with wettable flanks.