ST3M01
TRIPLE VOLTAGE REGULATOR
s
s
s
s
s
s
ONLY TWO CELL NEED AS INPUT
THREE REGULATED OUTPUT
1) HIGH EFFICENCY PFM DC/DC
CONVERTER 3.3V AT 200mA (87%
EFFICENCY)
2) VERY LOW NOISE AND VERY LOW
DROP V
REG
(3V AT 20mA)
3) VERY LOW NOISE AAND VERY LOW
DROP V
REG
(1.9V AT 20mA)
LOGIC CONTROLLED ELECTRONIC
SHUTDOWN
LOW BATTERY DETECTOR
VIRTUAL GND PIN
TEMPERATURA RANGE: -40 TO 85擄C
SO-14
SCHEMATIC DIAGRAM
Vin
150 碌F
15 碌H
IN_SW
Lx
DC/DC
DC/DC
OUT DC/DC
Linear A
OUT LA
1 碌F
IN_Linear
Linear B
OUT LB
1 碌F
Virtual GND
150 碌F
On-Mode
Off-Mode
SHDN
+
LBO
Ref
Ref
-
Vref
100 nF
1 K
鈩?/div>
GND_SW
GND_Signal
November 2000
1/11
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