Texas Instruments LM5163-Q1 Handleiding

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LM5163-Q1 100V Input, 0.5A Synchronous Buck DC/DC Converter With Ultra-low I

Q

1 Features

•AEC-Q100-qualified for automotive applications

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

ambient temperature range

•Designed for reliable and rugged applications

–Wide input voltage range of 6V to 100V

–Junction temperature range: –40°C to +150°C

–Fixed 3ms internal soft-start timer

–Peak and valley current-limit protection

–Input UVLO and thermal shutdown protection

•Optimized for ultra-low EMI requirements

•Suited for scalable automotive power supplies

–Low minimum on- and off-times of 50ns

–Adjustable switching frequency up to 1MHz

–Diode emulation for high light-load efficiency

–10.5µA no-load input quiescent current

–3µA shutdown quiescent current

•Integration reduces design size and cost

–COT mode control architecture

–Integrated 0.725Ω NFET buck switch

–Integrated 0.34Ω NFET synchronous rectifier

eliminates external Schottky diode

–1.2V internal voltage reference

–No loop compensation components

–Internal VCC bias regulator and boot diode

•Create a custom regulator design using

WEBENCH

®

power designer

2 Applications

•Automotive 48V mild hybrid ECU bias supplies

•Automotive DC/DC converters

•Automotive HVAC compressors and PTC heaters

3 Description

The LM5163-Q1 synchronous buck converter is

designed to regulate over a wide input voltage range,

minimizing the need for external surge suppression

components. A minimum controllable on-time of 50ns

facilitates large step-down conversion ratios, enabling

the direct step-down from a 48V nominal input to

low-voltage rails for reduced system complexity and

solution cost. The LM5163-Q1 operates during input

voltage dips as low as 6V, at nearly 100% duty cycle

if needed, making the device an excellent choice for

high-performance 48V battery automotive applications

and MHEV/EV systems.

With integrated high-side and low-side power

MOSFETs, the LM5163-Q1 delivers up to 0.5A of

output current. A constant on-time (COT) control

architecture provides nearly constant switching

frequency with excellent load and line transient

response. Additional features of the LM5163-Q1

include ultra-low I

Q

and diode emulation mode

operation for high light-load efficiency, innovative peak

and valley overcurrent protection, integrated VCC

bias supply and bootstrap diode, precision enable

and input UVLO, and thermal shutdown protection

with automatic recovery. An open-drain PGOOD

indicator provides sequencing, fault reporting, and

output voltage monitoring.

The LM5163-Q1 is qualified to automotive AEC-Q100

grade 1 and is available in a 8-pin SO PowerPAD

™

package. The device 1.27mm pin pitch provides

adequate spacing for high-voltage applications.

Package Information

PART

NUMBER

PACKAGE

(1)

PACKAGE SIZE

(2)

LM5163-Q1DDA (SO PowerPAD, 8)4.9mm × 6mm

(1)For more information, see Section 10.

(2)The package size (length × width) is a nominal value and

includes pins, where applicable.

V

OUT

= 12 V

SW

BST

PGOOD

VIN

EN/UVLO

GND

RON

FB

LM5163-Q1

C

OUT

22 µF

C

IN

2.2 µF

V

IN

= 6 V...100 V

I

OUT

= 0.5 A

L

O

120 µH

*V

OUT

tracks V

IN

if V

IN

< 12 V

C

BST

2.2 nF

R

FB1

448 k:

R

FB2

49.9 k:

R

RON

100 k:

U

1

Typical Application

Load (A)

Efficiency (%)

0.0010.010.10.5

60

65

70

75

80

85

90

95

100

D001

V

IN

= 15V

V

IN

= 24V

V

IN

= 48V

V

IN

= 60V

Typical Application Efficiency, V

OUT

= 12V

LM5163-Q1

SNVSBC2A – JUNE 2019 – REVISED APRIL 2024

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

Product specificaties