LDR1825K7-R 데이터 시트보기 (PDF) - STMicroelectronics

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LDR1825K7-R

VERY LOW DROP DUAL VOLTAGE REGULATOR

STMicroelectronics 

LDRxxyy

VERY LOW DROP

DUAL VOLTAGE REGULATOR

s OUTPUT CURRENT 1 UP TO 500mA

s OUTPUT CURRENT 2 UP TO 1.0A

s LOW DROPOUT VOLTAGE 1

(0.3V @ IO =500mA)

s LOW DROPOUT VOLTAGE 2

(0.4V @ IO =1A)

s VERY LOW SUPPLY CURRENT (TYP.50µA

IN OFF MODE, 1.6mA MAX IN ON MODE)

s LOGIC-CONTROLLED ELECTRONIC

SHUTDOWN

s OUTPUT VOLTAGE AVAILABILITY FOR

EACH REGULATOR: 1.8V, 2.5V, 3.3V

s INTERNAL CURRENT AND THERMAL LIMIT

s STABLE WITH LOW VALUE (MIN 4.7µF)

AND LOW E.S.R. OUTPUT CAPACITORS

s SUPPLY VOLTAGE REJECTION: 70dB (TYP.)

s TEMPERATURE RANGE (-40°C TO 125°C)

DESCRIPTION

The LDRxxyy is a Very Low Drop Dual Voltage

Regulator available in PPAK for the version

without inhibit and in SPAK-7L for the version with

the shutdown feature. The very low drop-voltage

Figure 1: Block Diagram

SPAK-7L

PPAK

(0.5V) and the very low supply current make it

particularly suitable for low noise and low power

applications such as PDA, MICRODRIVE and

other data storage applications while the used

high voltage technology makes this device

suitable for consumer applications such as

MONITORS AND SET-TOP-BOX. For each VO a

Shutdown Logic Control function is available (TTL

compatible) to decrease the total power

consumption.

VI1

POWER 1

VO1

INH1

START UP 1

BAND GAP 1

DRIVER 1

+

-

ERROR

AMPLIFIER 1

THERMAL 1

August 2004

INH2

START UP 2

BAND GAP 2

VI2

THERMAL 2

+

-

ERROR

AMPLIFIER 2

DRIVER 2

POWER 2

VO2

Rev. 2

1/13

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