1 Features
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Designed for rugged industrial applications:
– Junction temperature range –40°C to +150°C
– Input transient capability up to 70 V
– Wide input voltage range: 3.0 V (falling
threshold) to 65 V
– Minimized switch node ringing to reduce EMI
– Adjustable and fixed output 3.3-V and 5-V
voltage options available
• Designed for scalable industrial power supplies:
– Pin compatible with LMR36503 (65 V, 300 mA)
and LMR36506 (65 V, 600 mA)
– Adjustable switching frequency: 200 kHz to
2.2 MHz with RT pin variant
• Minimized design size and cost:
– Ultra-small, 2-mm × 2-mm HotRod™ package
• High efficiency across load range with low power
dissipation:
– Greater than 80% peak efficiency at 1 MHz
(3.3-V VOUT)

2 Applications
• Factory automation: field transmitters and process
sensors
• Building automation: HVAC and fire safety
notification and detectors
• Appliances: garden and power tools
• Portable electronics: headphones and earbuds

3 Description
The LMR36500 is the industry smallest 65-V, 50-mA
synchronous step-down DC/DC converter in 4-mm2
HotRod package. This easy-to-use converter can
handle input voltage transients up to 70 V, provide
excellent EMI performance and supports fixed, 3.3 V,
5 V and other adjustable output voltages.
The LMR36500 uses a peak current mode control
architecture with internal compensation to maintain
stable operation with minimal output capacitance. The
LMR36500 with the right resistor selection from the
RT pin to ground can be externally programmed to
any desired switching frequency of operation over a
wide range from 200 kHz to 2.2 MHz. The precision
EN/UVLO feature allows precise control of the device
during start-up and shutdown. The PGOOD flag,
with built-in glitch filter and delayed release, offers
a true indication of the system status, eliminating
the requirement for an external voltage supervisor.
The compact design size and rich feature set of
LMR36500 simplifies implementation for a wide range
of industrial applications.