1 Features
• Functional Safety-Capable
– Documentation available to aid functional safety
system design
• Versatile synchronous buck DC/DC module:
– Integrated MOSFETs, inductor, and controller
– Wide input voltage range: 3 V to 65 V
– Input transient protection up to 70 V
– Junction temperature range –40°C to +125°C
– 4.5-mm × 3.5-mm × 2-mm overmolded package
– Frequency adjustable from 200 kHz to 2.2 MHz
using the RT pin or an external SYNC signal
• Ultra-high efficiency across the full load range:
– Greater than 90% efficiency at 12 VIN, 3.3-VOUT
– Greater than 85% efficiency at 24 VIN, 5-VOUT
– Ultra-low operating quiescent current at no
load: 4 μA at VIN = 24 V to 3.3-V VOUT
• Optimized for ultra-low EMI requirements:
– Spread-spectrum reduces peak emissions
– Pin selectable FPWM mode for constant
frequency at light loads with MODE/SYNC pin
– FSW synchronization with MODE/SYNC pin
• Output voltage and current options:
– Fixed output variants of 3.3-V or 5-V VOUT
– Adjustable output voltage from 1 V to 13 V
– 600-mA output current (TPSM365R6)
– 300-mA output current (TPSM365R3)
• Inherent protection features for robust design
– Precision enable input and open-drain PGOOD
indicator for sequencing, control, and VIN UVLO
– Overcurrent and thermal shutdown protections
• Create a custom design using the TPSM365R6
with the WEBENCH® Power Designer

2 Applications
• Factory automation and control
• Building automation
• Test equipment
• Appliances

3 Description
The TPSM365R6 is a 600-mA, 65-V input
synchronous step-down DC/DC power module that
combines power MOSFETs, integrated inductor and
boot capacitor in a compact and easy-to-use 3.5-mm
× 4.5-mm × 2-mm, 11-pin QFN package. The small
HotRod™ QFN package technology enhances the
thermal performance and low EMI. It features the
ultra-low operating IQ of 4 μA at no load (24 V to
3.3-V VOUT). The TPSM365R6 is available in two
fixed output voltage option supporting 3.3 V and 5
V, and an adjustable output voltage option supporting
1-V to 13-V range. The module only requires four
external components for a 3.3-V and 5-V fixed output
solution. The TPSM365R6 is optimized for excellent
EMI performance and space constraint applications.
The TPSM365R6 uses a peak current mode control
scheme with internal compensation to maintain stable
operation with minimal output capacitance. The
precision EN feature allows precise control of the
device during start-up and shutdown. An open-drain
PGOOD output provides a true indication of the output
voltage status. The TPSM365R6 includes prebias
start up, overcurrent, and temperature protections,
making the TPSM365R6 an excellent device for
powering a wide range of industrial applications.
In the fixed option variants, the MODE/SYNC pin
enables seamless transition from FPWM to PFM with
a no-load standby quiescent current of less than
4 μA, ensuring high efficiency and superior transient
response for the entire load-current range.