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1 Features

? Functional Safety-Capable

– Documentation available to aid functional safety

system design

? Miniature solution size and low component cost

– 2-mm × 2-mm HotRod? package with wettable

flanks

– Internal compensation

? Optimized for ultra-low EMI requirements

– Pin selectable FPWM mode for constant

frequency at light loads with MODE/SYNC pin

– FSW synchronization with MODE/SYNC pin

? Designed for industrial applications

– –40°C to +150°C junction temperature range

– Supports 42-V transients

– Supports 3-VIN minimum

– Adjustable up to 95 of VIN, 3.3-V and 5-V

fixed VOUT options available

? Greater than 85 efficiency at 1 mA

– 1.3-μA IQ at 24 VIN, 5 VOUT (fixed)

? Designed for scalable power supplies

– 200 kHz to 2.2 MHz (RT pin) adjustable FSW

– Pin compatible with:

? LMR36506 (65 V, 600 mA)

? LMR36503 (65 V, 300 mA)

2 Applications

? Factory automation: Field transmitters and process

sensors

? Building automation: HVAC and fire safety

? Appliances: Garden and power tools

3 Description

The LMR436x0 is the industry smallest 36-V, 2-A,

and 1-A synchronous step-down DC/DC converters in

a 2-mm × 2-mm HotRod package. This easy-to-use

converter supports a wide input voltage range of 3.0 V

to 36 V with transients up to 42 V.

The control architecture and feature-set are optimized

for an ultra-small solution size. The device uses peak

current mode control to minimize output capacitance.

The LMR436x0 minimizes input filter size by using

dual random spread spectrum, a low-EMI HotRod

package, and an optimized pinout. The MODE/SYNC

and RT pin variants can be used to set or synchronize

the frequency between 200 kHz and 2.2 MHz to avoid

noise sensitive frequency bands.

The compact solution size and rich feature set of

LMR436x0 simplifies implementation for a wide range

of industrial applications.