LTC1517-3.3 Просмотр технического описания (PDF) - Linear Technology
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LTC1517-3.3 Datasheet PDF : 8 Pages
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LTC1517-3.3
TYPICAL APPLICATIONS
Low Noise Boosted 3.3V Supply
0.1µF
VIN
2.7V TO 4.4V
5
4
C1–
C1+
LTC1517-3.3
VIN GND VOUT
1
2
3
3.3µF
470Ω
3.3µF
Q2
Q1, Q2: 2N3904
A
470Ω
3.3µF
Q1 B
1µF
1517 TA04a
A
50mV/DIV
AC COUPLED
VOUT
B
2mV/DIV
AC COUPLED
VOUT = 3.3V
IOUT = 8mA
VRIPPLE = 2mVP-P
VIN = 2.7V
IOUT = 5mA
10µs/DIV
1517 TA04b
VIN
2V TO 4.4V
Generating 3.3V and a Negative Supply
3.3µF
0.1µF
5
4
C1–
C1+
LTC1517-3.3
VIN GND VOUT
1
2
3
3.3µF
470Ω
21.5k
VOUT = 3.3V ± 4%
IOUT = 5mA (2V ≤ VIN ≤ 4.4V)
IOUT = 10mA (2.5V ≤ VIN ≤ 4.4V)
Q1
Q2
0.1µF
10k
**
– VOUT = –0.8V TO – 3V
1517 TA05 – IOUT = 0mA to 5mA
3.3µF
*
*CENTRAL SEMICONDUCTOR CMPSH-35 DUAL SCHOTTKY
**OPTIONAL CIRCUITRY FOR MAINTAINING – VOUT WITH LOW
VOUT LOADS
Q1, Q2: 2N3904
6
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