深圳市中立信电子科技有限公司

1 Features

1• The LM53603-Q1, LM53602-Q1 are available as

AEC-Q1-Qualified Automotive Grade Products

With Following Results:

– Device Temperature Grade 1: -40°C to +125°C

Ambient Operating Range

– Device HBM ESD Classification Level 1C

– Device CDM ESD Classification Level C4B

2 Applications

• Navigation/GPS

• Instrument Cluster

• ADAS, Infotainment, HUD

3 Description

The LM53603-Q1, LM53602-Q1 buck regulators are

specifically designed for automotive applications,

providing an output voltage of 5 V or 3.3 V (with ADJ

option) at 3 A or 2 A, from an input voltage of up to

36 V. Advanced high-speed circuitry allows the

device to regulate from an input of up to 20 V, while

providing an output of 5 V at a switching frequency of

2.1 MHz. The innovative architecture allows the

device to regulate a 3.3 V output from an input

voltage of only 3.5 V. All aspects of this product are

optimized for the automotive customer. An input

voltage range up to 36 V, with transient tolerance up

to 42 V, eases input surge protection design. An open

drain reset output, with filtering and delay, provides a

true indication of system status. This feature negates

the requirement for an additional supervisory

component, saving cost and board space. Seamless

transition between PWM and PFM modes, along with

a no-load operating current of only 24 μA, ensures

high efficiency and superior transient response at all

loads.