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.