LM5190-Q1中文資料德州儀器數(shù)據(jù)手冊PDF規(guī)格書

1 Features

? AEC-Q100 qualified for automotive applications:

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

ambient operating temperature

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

? Adjustable output voltage from 0.8V to 80V, or

fixed output of 5V or 12V

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

operation

– Current regulation accuracy: ± 4.5%

– 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 driver

? Power-good output voltage 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 internal 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-Q1 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 (±

4.5%) . 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-Q1 has an

output current monitor.

The LM5190-Q1 has a unique EMI reduction

feature known as dual random spread spectrum

(DRSS). Combining low-frequency triangular and

high-frequency random modulations mitigates EMI

disturbances across lower and higher frequency

bands, respectively. This hybrid technique aligns with

the multiple resolution bandwidth (RBW) settings

specified in industry-standard EMC tests.

Additional features of the LM5190-Q1 include

150°C maximum junction temperature operation,

user-selectable diode emulation for lower current

consumption at light-load conditions, open-drain

power-good flag for fault reporting and output

monitoring, precision enable input, monotonic start-up

into prebiased load, integrated dual-input VCC bias

supply regulator, internal 2.75ms soft-start time, and

thermal shutdown protection with automatic recovery.

The LM5190-Q1 controller comes in a 3.5mm ×

4.5mm, thermally enhanced, 19-pin VQFN package

with wettable flank pins to facilitate optical inspection

during manufacturing.