1 Features

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Wide operating input voltage: 3V to 36V (42V

absolute maximum)

• Pin programmable output voltage options available

in fixed 3.3V/ADJ and 5V/ADJ

– Adjustable output voltage range from 1V to 20V

• Low minimum tON (30ns typical)

• Optimized for low electromagnetic interference

(EMI) requirements:

– Low inductance HotRod™ QFN package

– Advanced spread spectrum options available

• Programmable switching frequency from 200kHz –

2.2MHz

• FPWM, PFM, or external frequency

synchronization available

• Ultra-low quiescent current

– Shutdown current: 0.65μA

– Standby current: 5μA

• Designed for scalable power supplies

– Pin compatible with LMR60406, LMR60420,

LMR60430, and LMR60440

• Power-Good output for power sequencing

2 Applications

• Industrial transportation

• Factory automation and control

• Motor drives

3 Description

The LMR60410 is a 3V to 36V (42V transient), 1A,

synchronous, buck converter designed for industrial

applications. The LMR60410 offers variants with

spread spectrum in an ultra-compact, 2.5mm ×

2mm, HotRod QFN-9 package, with wettable flanks

available, which reduces inductance and achieves

low electromagnetic interference (EMI) performance

to facilitate qualification of industrial and other noisesensitive

designs. All device variants are capable of

output voltages ranging from 1V to 20V by including

a resistor divider between the output voltage node,

feedback, and ground. Each variant of the device is

also capable of delivering a fixed output voltage by

connecting the output voltage node directly to the

feedback pin. The Device Comparison Table provides

details on the fixed output voltage options. The

current-mode control architecture with 30ns (typical)

minimum on-time allows high conversion ratios at high

frequencies, easy loop compensation, fast transient

response, and excellent load and line regulation.

An open drain power-good output facilitates power

sequencing requirements. The MODE/SYNC pin of

the LMR60410 allows the user to select between

modes of operation. Forced pulse width modulation

(FPWM) mode results in constant switching frequency

across load while auto mode allows for seamless

transitions between pulse width modulation (PWM)

and pulse frequency modulation (PFM) switching. In

auto mode, the LMR60410 consumes only 5μA of

quiescent current which facilitates high efficiency at all

loads. Few external components are needed allowing

for compact PCB layout. The LMR60410 is a part of

a family of pin compatible devices ranging in current

levels from 0.6A to 6A.