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ST755 Datasheet

  • ST755

  • ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULA...

  • 84.08KB

  • 9頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST755
ADJUSTABLE INVERTING NEGATIVE OUTPUT
CURRENT MODE PWM REGULATORS
s
s
s
s
s
s
s
s
2.7V TO 11V INPUT TO ADJUSTABLE
NEGATIVE OUTPUT CONVERSION
1W GUARANTEED OUTPUT POWER
(V
in
>4.5V, T鈮?0
o
C)
68% TYP. EFFICENCY AT 6V
VERY LOW QUIESCENT CURRENT: 1.2mA
IN ON MODE 10碌A(chǔ) IN SHUT DOWN MODE
SOFT START
VERY LOW NOISE OUTPUT
160KHz FIXED FREQUENCY OSCILLATOR
MIXED BIPOLAR-CMOS TECHNOLOGY
DIP-8
SO-8
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
V
in
>4.5V, V
out
= -5V and 0
o
C
鈮?/div>
Ta
鈮?/div>
70
o
C) and
275mA (typical value at T
a
= 25
o
C, V
out
= -5V).
A logic controlled shut down pin that interfaces
directly with microprocessor reduces supply
current to only 10碌A(chǔ). Input to Output differential
voltage is limited to V
in
+|V
out
|<12.7V. No load
supply current is 1.2mA.
September 1998
1/9

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