Datasheet > LMR38010

LMR38010

更新时间： 2024-09-10 02:52:27

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
39页	2139K
描述
LMR38010 SIMPLE SWITCHERÂ® 4.2-V to 80-V, 1-A Synchronous Buck Converter with 40-Î¼A IQ

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LMR38010 数据手册

LMR38010

SNVSC73 – JANUARY 2022

LMR38010 SIMPLE SWITCHER^®4.2-V to 80-V, 1-A Synchronous Buck Converter with

40-µA I_Q

1 Features

3 Description

•

Functional Safety-Capable

– Documentation available to aid functional safety

system design

Configured for rugged industrial applications

– Input voltage range: 4.2 V to 80 V

– 1-A continuous output current

– Ultra-low 40-µA operating quiescent current

– > 1.5-mm distance between VIN and GND pin

– Adjustable switching frequency from 200 kHz to

2.2 MHz

– Frequency synchronization to external clock

– Spread spectrum option for reduced EMI

– 97% maximum duty cycle

– Support start-up with pre-biased output

– ±1.0% tolerance voltage reference at room

temperature

The LMR38010 synchronous buck converter is

designed to regulate over a wide input voltage range,

minimizing the need for external surge suppression

components. The LMR38010 operates during input

voltage dips as low as 4.2 V, at nearly 100% duty

cycle if needed, making it an excellent choice for wide

input industrial applications and MHEV/EV systems.

The LMR38010 uses precision enable to provide

flexibility by enabling a direct connection to the

wide input voltage or precise control over device

start-up and shutdown. The power-good flag, with

built-in filtering and delay, offers a true indication of

system status, eliminating the need for an external

supervisor. The device incorporates pseudorandom

spread spectrum for minimal EMI and switching

frequency can be configured between 200 kHz and

2.2 MHz to avoid noise sensitive frequency bands. In

addition, the frequency can be selected for improved

efficiency at low operating frequency or smaller

solution size at high operating frequency.

– Precision enable

– Easy to use with low BOM count

– Integrated synchronous rectification

– Internal compensation for ease of use

– 8-pin HSOIC with PowerPAD^™package

– PFM and forced PWM (FPWM) options

Create a custom design using the LMR38010 with

the WEBENCH^®Power Designer

The device has built-in protection features such as

cycle-by-cycle current limit, hiccup mode short-circuit

protection, and thermal shutdown in case of excessive

power dissipation. The LMR38010 is available in a

8-pin HSOIC PowerPAD package.

•

2 Applications

•

Industrial transport

Wireless infrastructure and networking

Power delivery

Device Information

PART NUMBER

PACKAGE⁽¹⁾

BODY SIZE (NOM)

LMR38010

HSOIC (8)

4.89 mm × 3.90 mm

Factory automation and control

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

100%

90%

80%

70%

60%

50%

BOOT

V_IN

C_IN

VIN

C_BOOT

V_OUT

C_OUT

PGND

PFM, V_IN=24V

PFM, V_IN=36V

PFM, V_IN=48V

PFM, V_IN=64V

40%

30%

RT/SYNC

R_FBT

R_T

FPWM, V_IN=24V

FPWM, V_IN=36V

FPWM, V_IN=48V

FPWM, V_IN=64V

20%

10%

R_FBB

0.001 0.002 0.005 0.01 0.02

0.05 0.1 0.2 0.3 0.5

Load Current (A)

Simplified Schematic

Efficiency vs Output Current V_OUT= 5 V, 400 kHz

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.

12 3 4 5 6 7...39

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