ST755 datasheet(1/9 Pages) STMICROELECTRONICS

部件名	ST755

功能描述	ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS

PDF	9 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 9 page

ST755

ADJUSTABLE INVERTING NEGATIVE OUTPUT

CURRENT MODE PWM REGULATORS

®

September 1998

s

2.7V TO 11V INPUT TO ADJUSTABLE

NEGATIVE OUTPUT CONVERSION

s

1W GUARANTEED OUTPUT POWER

(Vin>4.5V, T

≤70oC)

s

68% TYP. EFFICENCY AT 6V

s

VERY LOW QUIESCENT CURRENT: 1.2mA

IN ON MODE 10

µA IN SHUT DOWN MODE

s

SOFT START

s

VERY LOW NOISE OUTPUT

s

160KHz FIXED FREQUENCY OSCILLATOR

s

MIXED BIPOLAR-CMOS TECHNOLOGY

DESCRIPTION

The

ST755

is

an

adjustable

inverting

switch-mode

DC-DC rergulator with

internal

Power MOSFET that generaters an adjustable

negative output from a voltage input of 2.7V to

11V, output

current guaranteed at 200mA (for

BLOCK DIAGRAM

DIP-8

SO-8

Vin>4.5V, Vout = -5V and 0

oC

≤ Ta ≤ 70oC) and

275mA (typical value at Ta =25

oC, Vout = -5V).

A logic controlled shut down pin that interfaces

directly with microprocessor reduces supply

current to only 10

µA. Input to Output differential

voltage is limited to Vin+|Vout|<12.7V. No load

supply current is 1.2mA.

1/9

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