LM27402 datasheet(7/48 Pages) TI

部件名	LM27402

功能描述	LM27402 High-Performance Synchronous Buck Controller With DCR Current Sensing

Download	48 Pages

Scroll/Zoom	100%

制造商	TI [Texas Instruments]

网页	http://www.ti.com

标志

7 / 48 page

LM27402

www.ti.com

SNVS615J – JANUARY 2010 – REVISED JULY 2015

Electrical Characteristics (continued)

Unless otherwise stated, the following conditions apply: VVIN = 12 V. Limits in standard type are for TJ = 25°C only. Minimum

and maximum limits are specified through test, design, or statistical correlation. Typical values represent the most likely

parametric norm at TJ = 25°C and are provided for reference purposes only.

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

POWERGOOD

VPGOOD = 0.2 V, VFB = 0.75 V, TJ = 25°C

60

IPGS

PGOOD Low Sink Current

µA

VPGOOD = 0.2 V, VFB = 0.75 V, TJ =

0

100

–40°C to +125°C

IPGL

PGOOD Leakage Current

VPGOOD = 5 V

1

10

µA

VFB Rising, TJ = 25°C

117%

OVT

Overvoltage Threshold

VFB Rising, TJ = –40°C to +125°C

114%

120%

OVT_HYS

OVT Hysteresis

VFB Falling

2%

VFB Rising , TJ = 25°C

94%

UVT

Undervoltage Threshold

VFB Rising, TJ = –40°C to +125°C

91%

97%

UVT_HYS

UVT Hysteresis

VFB Falling

3%

ENABLE

VEN Rising, TJ = 25°C

1.17

VEN

Enable Logic High Threshold

V

VEN Rising, TJ = –40°C to +125°C

1.10

1.24

VEN_HYS

Enable Hysteresis

VEN Falling

100

mV

IEN

Enable Pin pullup Current

VEN = 0 V

2

µA

FREQUENCY SYNCHRONIZATION

VLH_SYNC

SYNC Pin Logic High

VVDD = 4.7 V, TJ = –40°C to +125°C

2.0

V

VLL_SYNC

SYNC Pin Logic Low

VVDD = 4.7 V, TJ = –40°C to +125°C

0.8

V

SYNCFSW_L Minimum Clock Sync Frequency

TJ = –40°C to +125°C

200

kHz

SYNCFSW_H Maximum Clock Sync Frequency

TJ = –40°C to +125°C

1200

kHz

THERMAL SHUTDOWN

TSHD

Thermal Shutdown

Temperature Rising

165

°C

TSHD_HYS

Thermal Shutdown Hysteresis

Temperature Falling

15

°C

6.6 Timing Requirements

MIN

NOM

MAX

UNIT

SOFT-START

TSS_INT

Internal Soft-Start Time

1.28

ms

POWERGOOD

TDEGLITCH

Deglitch Time

VPGOOD Rising and Falling

20

µs

6.7 Switching Characteristics

over operating free-air temperature range (unless otherwise noted)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SWITCHING

VFB = 0.5 V, TJ = 25°C

165

TOFF_MIN

Minimum Off Time

ns

VFB = 0.5 V, TJ = –40°C to +125°C

125

5

205

GATE DRIVE

TDT

Deadtime Timeout

FSW = 500 kHz

40

ns

Submit Documentation Feedback

7

Product Folder Links: LM27402

类似零件编号 - LM27402

制造商	部件名	数据表	功能描述
National Semiconductor ...	LM27402	670Kb / 32P	High Performance Synchronous Buck Controller with DCR Current Sensing
	LM27402	167Kb / 4P	Current Limit Application Circuits Application Circuits
	LM27402MH	670Kb / 32P	High Performance Synchronous Buck Controller with DCR Current Sensing
	LM27402MHX	670Kb / 32P	High Performance Synchronous Buck Controller with DCR Current Sensing
	LM27402SQ	670Kb / 32P	High Performance Synchronous Buck Controller with DCR Current Sensing

More results

类似说明 - LM27402

制造商	部件名	数据表	功能描述
National Semiconductor ...	LM27402	670Kb / 32P	High Performance Synchronous Buck Controller with DCR Current Sensing
Linear Technology	LTC3866	465Kb / 36P	Current Mode Synchronous Controller for Sub Milliohm DCR Sensing
Linear Technology	LTC3866	527Kb / 36P	Current Mode Synchronous Controller for Sub Milliohm DCR Sensing
Analog Devices	LTC7878	1Mb / 28P	70V Parallelable 4-Switch Buck-Boost Controller with Inductor DCR Current Sensing Rev. 0
Linear Technology	LTC3774	408Kb / 38P	Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing
Linear Technology	LTC3774	421Kb / 38P	Dual, Multiphase Current Mode Synchronous Controller for Sub-Milliohm DCR Sensing
Micro Linear Corporatio...	ML4902	191Kb / 12P	High Current Synchronous Buck Controller
Semtech Corporation	SC4510	733Kb / 16P	High Performance Synchronous Buck Controller With Reference Tracking
Micro Linear Corporatio...	ML4900	232Kb / 8P	High Current Synchronous Buck Controller
Micro Linear Corporatio...	ML4903	162Kb / 12P	High Current Synchronous Buck Controller