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70擄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 regulator with internal Power MOSFET
that generators an adjustable negative output
from a voltage input of 2.7V to 11V, output current
guaranteed at 200mA (for V
I
> 4.5V, V
O
= -5V and
SCHEMATIC DIAGRAM
T
A
= 0擄C to 70擄C) and 275mA (typical value at T
A
= 25擄C, V
O
= -5V).
A logic controlled shut down pin that interfaces
directly with microprocessor reduces supply
current to only 10mA. Input to Output differential
voltage is limited to V
I
+|V
O
|<12.7V. No load
supply current is 1.2mA.
June 2003
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