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ST755CN Scheda tecnica(PDF) 1 Page - STMicroelectronics

Il numero della parte ST755CN
Spiegazioni elettronici  ADJUSTABLE INVERTING NEGATIVE OUTPUT CURRENT MODE PWM REGULATORS
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST755CN Scheda tecnica(HTML) 1 Page - STMicroelectronics

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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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