LV3842中文資料德州儀器數(shù)據(jù)手冊(cè)PDF規(guī)格書

1 Features

? New product available:

– LMR54406 4-V to 45-V, 0.6-A, 1.1-MHz

synchronous buck converter

? For faster time to market:

– TPSM365R6 3-V to 65-V, 0.6-A, 200-kHz to

2.2-MHz power module

? Configured for rugged industrial applications

– 4-V to 36-V input voltage range supporting 40-V

absolute maximum rating

– 600-mA continuous output current

– 70-ns minimum switching-on time

– 98 maximum duty cycle

– PFM and Forced PWM (FPWM) options

– 1.1-MHz switching frequency

– Support start-up with pre-biased output

– Short-circuit protection with hiccup mode

– ±0.5 tolerance voltage reference at 25°C

junction temperature

– Precision enable

– Overtemperature protection

? Small solution size and ease of use

– Integrated synchronous rectification

– Internal compensation for ease of use

– SOT-23-6 package

2 Applications

? Electricity meter

? Smart meter data collector, concentrator

? Power Line Communication (PLC) module

? General purpose wide VIN power supplies

3 Description

The LV3842 is an easy to use synchronous step-down

DC-DC converter capable of driving up to 600-mA

load current. With a wide input range of 4 V to

36 V, the device is designed for a wide range of

industrial applications for power conditioning from an

unregulated source.

The LV3842 employs 1.1-MHz switching frequency

for small solution size. The LV3842 also has FPWM

(forced PWM) version to achieve constant frequency

and small output voltage ripple over the full load

range. Soft-start and compensation circuits are

employed internally which allows the device to be

used with minimum external components.

The device has built-in protection features, such

as cycle-by-cycle current limit, hiccup mode shortcircuit

protection, and thermal shutdown in case of

excessive power dissipation. The LV3842 is available

in SOT-23-6 package.