L6997DTR Datasheet

IC型號：
L6997DTR
PDF描述：
STEP DOWN CONTROLLER FOR LOW VOLTAGE OPERATIONS
文件大小：
292.42KB
PDF頁數(shù)：
23頁
芯片廠家：
STMICROELECTRONICS

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L6997

STEP DOWN CONTROLLER

FOR LOW VOLTAGE OPERATIONS

FEATURES

FROM 3V TO 5.5V V

RANGE.

MINIMUM OUTPUT VOLTAGE AS LOW AS

0.6V.

1V TO 28V INPUT VOLTAGE RANGE.

CONSTANT ON TIME TOPOLOGY ALLOWS.

OPERATION WITH VERYLOW AND HIGH

DUTY CYCLES.

VERY FAST LOAD TRANSIENTS.

0.6V, 鹵1% VREF.

SELECTABLE SINKING MODE.

LOSSLESS CURRENT LIMIT, AVAILABLE

ALSO IN SINKING MODE

REMOTE SENSING.

OVP,UVP LATCHED PROTECTIONS.

600碌A(chǔ) TYP QUIESCENT CURRENT.

POWER GOOD AND OVP SIGNALS.

PULSE SKIPPING AT LIGTH LOADS.

94% EFFICIENCY FROM 3.3V TO 2.5V.

APPLICATIONS

NETWORKING.

DC/DC MODULES.

DISTRIBUTED POWER.

MOBILE APPLICATIONS.

CHIP SET, CPU, DSP AND MEMORIES SUPPLY.

MINIMUM COMPONENT COUNT APPLICATION

3.3V

Rin2

Rin1

TSSOP20

ORDERING NUMBERS: L6997D

L6997DTR

DESCRIPTION

The device is a high efficient solution for networking

dc/dc modules and mobile application compatible

with 3.3V bus and 5V bus.

It's able to regulate an output voltage as low as 0.6V.

The constant on time topology assures fast load tran-

sient response. The embedded voltage feed-forward

provides nearly constant switching frequency opera-

tion.

An integrator can be introduced in the control loop to

reduce the static output voltage error.

The remote sensing improves the static and dynamic

regulation, recovering the wires voltage drop.

Pulse skipping technique reduces power consump-

tion at light loads. Drivers current capability allows

output currents in excess of 20A.

Cin

VCC

VDR

OSC

BOOT

HGATE

Cboot

PHASE

PGOOD

OVP

LGATE

Ro2

Ro1

Cout

Dboot

0.6V

L6997

ILIM

Rilim

PGND

GND

GNDSENSE

Css

VSENSE

INT

VFB

SHDN

Vref

Cvref

April 2003

1/23

制造商
STMicroelectronics
產(chǎn)品種類
開關(guān)變換器、穩(wěn)壓器與控制器
輸出電壓
0.6 V
工作溫度范圍
- 40 C to + 125 C
安裝風格
SMD/SMT
封裝 / 箱體
TSSOP-20
封裝
Reel
工廠包裝數(shù)量
2500

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L6997DTR Datasheet

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