1 Features

• Functional Safety-Capable

– Documentation available to aid functional safety

system design

• Wide input voltage operating range: 5V to 80V

• Adjustable output voltage from 0.8V to 79V, or

fixed output of 5V or 12V

• Constant-Current Constant-Voltage (CC-CV)

operation

– Current regulation accuracy: ±3%

– Voltage regulation accuracy: ±1%

• Current monitoring and constant current features

– Analog voltage proportional to output current

(IMON)

– Programmable average output current limit

(ILIM)

– Dynamic average output current limit (ISET)

• 2.3μA typical shutdown mode IQ and 15μA typical

sleep mode IQ

• Standard-level MOSFET gate drivers

• Power-good status indicator (PGOOD)

• Programmable switching frequency from 100kHz

to 2.2MHz

• Optional external clock synchronization

• Selectable dual random spread spectrum (DRSS)

feature for enhanced EMI performance across low

and high-frequency bands

• Internal slope compensation and bootstrap diode

• Dual-input VCC regulator to reduce power

dissipation (BIAS)

2 Applications

• Super capacitor energy backup

• USB power delivery

• E-bikes

• Power tools

• Server battery-backup unit (BBU)

• Energy storage system and solar energy

3 Description

The LM5190 is an 80V, ultra-low IQ, synchronous

buck DC/DC controller with Constant-Current

Constant-Voltage (CC-CV) regulation. The controller

uses a peak current-mode control architecture for

easy loop compensation, fast transient response, and

excellent load and line regulation. The integrated

CC-CV operation features a high accuracy for

the regulation of both voltage (±1%) and current

(±3%) . The CC-CV operation also provides seamless

transition between constant-current and constantvoltage

mode. The CC-CV operation effectively

reduces the bill of materials (BOM) count and cost

for applications that require average output current

control. The output current limit is programmable and

can be dynamically changed. The LM5190 has an

output current monitor.