1 Features

• AEC-Q100 qualified for automotive applications

– Device temperature grade 1: –40°C to 125°C

ambient operating temperature range

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

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

absolute maximum)

• Programmable output voltage options available in

fixed 3.3V/ADJ

– Adjustable output voltage range from 1V to 20V

• Ultra-low quiescent current

– Shutdown current: 0.65μA

– No load standby current: 5μA

• Optimized control loop for low output capacitance

• Optimized for ultra low EMI requirements:

– Facilitates CISPR 25 class 5 compliance

– Low inductance HotRod™ QFN package

– Spread spectrum options available

• Switching frequency from 200kHz – 2.2MHz

• Low minimum on time tON (30ns typical)

• FPWM, PFM, or external frequency

synchronization available

• Designed for scalable power supplies

– Pin compatible with LMR60406-Q1,

LMR60410-Q1, LMR60420-Q1, LMR60430-

Q1, LMR60440-Q1, LMR60441-Q1, and

LMR60460-Q1

• Power-Good output for power sequencing

2 Applications

• Automotive camera applications

• Automotive driver assistance systems

• Automotive body applications

3 Description

The LMR60450-Q1 is a 3V to 36V (42V transient),

5A automotive-grade synchronous buck converter.

The LMR60450-Q1 is available in an ultra compact

2.5mm × 2mm QFN-9 package with wettable flanks,

that helps minimize inductance and achieve low EMI

performance to facilitate qualification of automotive

and other noise-sensitive designs.

All device variants are capable of output voltages

ranging from 1V to 20V in adjustable output

configuration. Each variant 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 minimum on-time allows

high conversion ratios at high frequencies, easy loop

compensation, fast transient response, and excellent

load and line regulation.

Open drain power-good output facilitates power

sequencing requirements. The MODE/SYNC pin of

the LMR60450-Q1 allows the user to select between

forced pulse width modulation (FPWM), auto mode, or

external synchronization mode of operation.

The LMR60450-Q1 is designed to offer reduced

output capacitance leading to compact PCB layout

and system cost savings. The LMR60450-Q1 is a

part of a family of pin-compatible devices ranging in

current levels from 0.6A to 6A.