L6911CTR Datasheet

IC型號(hào)：
L6911CTR
PDF描述：
Analog IC
文件大小：
289.80KB
PDF頁數(shù)：
20頁
芯片廠家：
ETC

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L6911C

5 BIT PROGRAMMABLE STEP DOWN CONTROLLER

WITH SYNCHRONOUS RECTIFICATION

OPERATING SUPPLY IC VOLTAGE FROM 5V

TO 12V BUSES

UP TO 1.3A GATE CURRENT CAPABILITY

TTL-COMPATIBLE 5 BIT PROGRAMMABLE

OUTPUT COMPLIANT WITH VRM 8.4 :

1.3V TO 2.05V WITH 0.05V BINARY STEPS

2.1V TO 3.5V WITH 0.1V BINARY STEPS

VOLTAGE MODE PWM CONTROL

EXCELLENT OUTPUT ACCURACY:

鹵1%

OVER LINE AND TEMPERATURE

VARIATIONS

VERY FAST LOAD TRANSIENT RESPONSE:

FROM 0% TO 100% DUTY CYCLE

POWER GOOD OUTPUT VOLTAGE

OVERVOLTAGE PROTECTION AND

MONITOR

OVERCURRENT PROTECTION REALIZED

USING THE UPPER MOSFET鈥橲 R

dsON

200KHz INTERNAL OSCILLATOR

OSCILLATOR EXTERNALLY ADJUSTABLE

FROM 50KHz TO 1MHz

SOFT START AND INHIBIT FUNCTIONS

SO-20

ORDERING NUMBERS: L6911C

L6911CTR

(Tape and Reel)

DESCRIPTION

The device is a power supply controller specifica lly de-

signed to provide a high performance DC/DC conver-

sion for high current microprocessors. A precise 5-bit

digital to analog converter (DAC) allows adjusting the

output voltage from 1.30V to 2.05V with 50mV binary

steps and from 2.10V to 3.50V with 100mV binary steps.

APPLICATIONS

POWER SUPPLY FOR ADVANCED

MICROPROCESSOR CORE

DISTRIBUTED POWER SUPPLY

HIGH POWER DC-DC REGULATORS

The high precision internal reference assures the se-

lected output voltage to be within

鹵1%.

The high peak

current gate drive affords to have fast switching to the

external power mos providing low switching losses.

The device assures a fast protection against load

overcurrent and load overvoltage. An external SCR is

triggered to crowbar the input supply in case of hard

over-voltage. An internal crowbar is also provided

turning on the low side mosfet as long as the over-

voltage is detected. In case of over-current detection,

the soft start capacitor is discharged and the system

works in HICCUP mode.

BLOCK DIAGRAM

Vcc 5 to 12V

Vin 5V to12V

PGOOD

VCC

OCSET

BOOT

MONITOR and

PROTECTION

OVP

OSC

VD0

VD1

VD2

VD3

VD4

D/A

E/A

PWM

UGATE

PHASE

LGATE

PGND

GND

VSEN

VFB

1.300V to 3.500V

D01IN1260

COMP

November 2001

1/20

標(biāo)準(zhǔn)包裝
1
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - DC DC 切換控制器
系列
-
PWM 型
電壓模式
輸出數(shù)
1
頻率 - 最大
220kHz
占空比
100%
電源電壓
5 V ~ 12 V
降壓
是
升壓
無
回掃
無
反相
無
倍增器
無
除法器
無
Cuk
無
隔離
無
工作溫度
0°C ~ 125°C
封裝/外殼
20-SOIC（0.295"，7.50mm 寬）
包裝
Digi-Reel®
其它名稱
497-6109-6

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L6911CTR Datasheet

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