1 Features
• Versatile synchronous buck DC/DC module
– Integrated MOSFETs, inductor, and controller
– 3V to 65V wide input voltage range
– 40ns (maximum) low minimum on time enables
36V to 3.3V conversion at 2.2MHz
– –40°C to 150°C junction temperature range
– 5.80mm × 5.20mm × 2.93mm enhanced
HotRod™ QFN package with exposed inductor
– Frequency adjustable from 300kHz to 2.2MHz
• Ultra-high efficiency across the full load range
– > 92% peak efficiency at 24VIN, 5VOUT,
400kHz
– 2.5μA PFM no-load input current
• Optimized for ultra-low EMI requirements
– Facilitates CISPR 11 Class B compliance
– Mode pin configurable ±5% or ±10% dualrandom
spread spectrum reducing peak
emissions
– Enhanced HotRod QFN package with
symmetrical pinout
– Pin-configurable 400kHz and 2.2MHz
– Pin-configurable AUTO or FPWM operation
• Output voltage and current options
– 3.3V or 5V VOUT fixed output variants
– Adjustable output voltage from 1V to 24V
– 3A, 2A, 1A output current options
• Inherent protection features for robust design
– Precision enable input and open-drain powergood
indicator for sequencing, control, and VIN
UVLO
– Overcurrent and thermal shutdown protections

2 Applications
• Industrial transport systems
• Factory automation and control systems
• Medical imaging systems
• Test and measurement systems
• Aerospace and defense
• Building automation
• Power delivery
• Robotics

3 Description
The TPSM656x0 is a family of 3A, 2A, 1A, 65V (70V
tolerant) input synchronous step-down DC/DC power
module that combines power MOSFETs, integrated
inductor, and passives in a compact and easy-touse
5.8mm × 5.2mm × 2.93mm, 19-pin enhanced
HotRod QFN package. With the pin-selectable fixedoutput
voltages of 3.3V and 5V and adjustable
output voltage from 1V to 24V, the TPSM656x0
is designed to quickly and easily implement a low-
EMI design in a small PCB footprint. The module
only requires the input and output filter capacitors
to finish the design and eliminates the magnetics
and compensation part selection from the design
process. A pin-selectable ±5% or ±10% dual-random
spread spectrum (DRSS) significantly reduces peak
emissions through a combination of triangular and
pseudo-random modulation while keeping output
voltage ripple very low.