Datasheet > LM5145-Q1

LM5145-Q1

更新时间： 2024-11-24 02:52:23

品牌	Logo	应用领域
德州仪器 - TI		/
页数	文件大小	规格书
53页	5131K
描述
LM25148-Q1 42-V Automotive Synchronous Buck DC/DC Controller with Ultra-Low IQ and Dual Random Spread Spectrum

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LM5145-Q1 数据手册

LM25148-Q1

SNVSC03 – JUNE 2021

LM25148-Q1 42-V Automotive Synchronous Buck DC/DC Controller with Ultra-Low I_Q

and Dual Random Spread Spectrum

1 Features

2 Applications

•

AEC-Q100 qualified for automotive applications:

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

ambient operating temperature

•

Automotive electronic systems

Advanced driver assistance systems (ADAS)

Infotainment and clusters

Integrated EMI mitigation

3 Description

– Selectable dual random spread spectrum

(DRSS) feature for enhanced EMI performance

across low and high-frequency bands

– Optimized for CISPR 25 Class 5 requirements

Versatile synchronous buck DC/DC controller

– Wide input voltage range of 3.5 V to 42 V

– 1% accurate, fixed 3.3-V, 5-V, 12-V, or

adjustable outputs from 0.8 V to 36 V

The LM25148-Q1 is a 42-V, ultra-low I_Qsynchronous

buck DC/DC controller for high-current, single-output

applications. The controller uses a peak-current-mode

control architecture for easy loop compensation,

fast transient response, and excellent load and

line regulation. The LM25148-Q1 can be set up in

interleaved mode (paralleled output) with accurate

current sharing for high-current applications. It can

operate at input voltages as low as 3.5 V, at nearly

100% duty cycle if needed.

•

– 150°C maximum junction temperature

– Lossless DCR or shunt current sensing

– Shutdown mode current: 2.2 µA

– No-load standby current: 9 µA

The LM25148-Q1 has a unique EMI reduction

feature known as Dual Random Spread Spectrum

(DRSS). Combining low-frequency triangular and

high-frequency randomized modulations mitigates

EMI across lower and higher radio-frequency bands,

respectively. This hybrid technique aligns with

the multiple resolution bandwidth (RBW) settings

specified in industry-standard EMC tests.

•

Switching frequency from 100 kHz to 2.2 MHz

– SYNC in and SYNC out capability

– Selectable PFM or FPWM modes

Inherent protection features for robust design

– Internal hiccup mode overcurrent protection

– ENABLE and PGOOD functions

– VCC, VDDA, and gate-drive UVLO protection

– Internal or external loop compensation

– Thermal shutdown protection with hysteresis

Create a custom design using the LM25148-Q1

with WEBENCH^®Power Designer

Device Information

PART NUMBER

PACKAGE⁽¹⁾

BODY SIZE (NOM)

•

LM25148-Q1

VQFN (24)

3.5 mm × 5.5 mm

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

the end of the data sheet

V_IN= 3.5 V...42 V

C_IN

C_VCC

2.2

VCC

VIN

CBOOT

C_BOOT

0.1

V_OUT= 5 V

I_OUT= 8 A

Q₁

Q₂

R_S

CNFG

L_O

5 m

PGOOD

0.56

C_O

4 ꢀ 47

VDDA

LM25148-Q1

PGND

R_FB

PFM/SYNCIN

24.9 k

VOUT

EXTCOMP

* Tie to GND

if not used

VCCX

VDDA

AGND

R_T

C_VDDA

0.1

* V_OUTtracks V_INif V_IN< 5.2 V

9.52 k

Typical Application Schematic

CISPR 25 EMI Performance, 150 kHz to 30 MHz

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. ADVANCE INFORMATION for preproduction products; subject to change

without notice.

12 3 4 5 6 7...53

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与LM5145-Q1相关器件

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LM5145QRGYRQ1	TI	获取价格	LM5145-Q1 Automotive 75-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
LM5145RGYR	TI	获取价格	具有宽输入电压范围和占空比范围的 75V 同步降压控制器 \| RGY \| 20 \| -40
LM5145RGYT	TI	获取价格	具有宽输入电压范围和占空比范围的 75V 同步降压控制器 \| RGY \| 20 \| -40
LM5146	TI	获取价格	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
LM5146_V01	TI	获取价格	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
LM5146-Q1	TI	获取价格	LM25149 42-V Synchronous Buck DC/DC Controller with Ultra-Low IQ and Integrated Active EMI
LM5146QRGYRQ1	TI	获取价格	具有宽占空比范围的汽车类 100V 同步降压直流/直流控制器 \| RGY \| 20 \| -
LM5146QRGYTQ1	TI	获取价格	具有宽占空比范围的汽车类 100V 同步降压直流/直流控制器 \| RGY \| 20 \| -
LM5146RGYR	TI	获取价格	LM5146 100-V Synchronous Buck DC/DC Controller With Wide Duty Cycle Range
LM5148	TI	获取价格	3.5V 至 80V、电流模式同步降压控制器

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