Explanation

The LM46000-Q1 voltage regulator is an easy-to-use synchronous buck DC/DC converter that can drive load currents up to 500mA, with an input voltage range of 3.5V to 60V. LM46000-Q1 provides excellent efficiency, output accuracy, and voltage drop in a very small solution size. The extended series can provide 1A and 2A load current options in pin to pin compatible packaging. Adopting peak current mode control to achieve simple control loop compensation and cycle by cycle current limitation. Optional features include programmable switching frequency, synchronization, power normal flag, precise enable, internal soft start, and

Expanding soft startup and tracking can provide a flexible and easy-to-use platform for various applications. Intermittent conduction and automatic frequency modulation during light load can improve lightness

Load efficiency.

This series only requires very few external components, and the pin arrangement can achieve a simple and optimized PCB layout. The protection functions include thermal shutdown, VCC undervoltage locking, cycle by cycle current limitation, and output short circuit protection. The LM46000-Q1 device is packaged in a 16 pin HTSSOP (PWP) package (6.6mm × 5.1mm × 1.2mm), with a lead spacing of 0.65mm.

This device is pin to pin compatible with the LM4360x and LM4600x series. The LM46000A-Q1 version has been optimized for PFM operating mode and is recommended for new designs.

characteristic

Complies with automotive application standards

It has the following characteristics that comply with the AEC-Q100 standard:

Device temperature level 1: working junction temperature from -40 ° C to+125 ° C

range

24 µ A stabilized static current

High efficiency can be achieved under light load conditions (DCM and PFM)

The test results comply with EN55022/CISPR 22 EMI standard

Integrated synchronous rectification

Adjustable frequency range: 200kHz to 2.2MHz (default value is 500kHz)

Synchronize with external clock frequency

Internal compensation

Combined with almost any ceramic, solid-state electrolysis, tantalum, and aluminum capacitor

Maintain stability when working together

Power normal status flag

Soft start to pre biased load

Internal soft start: 4.1ms

Soft start time that can be extended by external capacitors

Output voltage tracking function

Accurately enabling system undervoltage lockout (UVLO)

Output short circuit protection with intermittent mode

Over temperature protection

Using LM46000-Q1 and leveraging WEBENCH ® Power Designer Create Custom Design

application

Automotive applications in 12V and 24V bands below AM

Telecommunication system

Commercial vehicle power supply

Universal wide VIN voltage stabilization

Efficient load point voltage stabilization