12
LTC1555/LTC1556
15556f LT/TP 0398 4K • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1997
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
(408) 432-1900
FAX: (408) 434-0507
●
TELEX: 499-3977
●
www.linear-tech.com
RELATED PARTS
PART NUMBER DESCRIPTION COMMENTS
LTC1514-3.3/LTC1514-5 Regulated Step-Up/Step-Down Charge Pumps with Low Bat Comparator 3.3V and 5V Output Versions
LTC1515 Series Regulated Step-Up/Step-Down Charge Pumps with Reset Output Adjustable, 3V/5V, 3.3V/5V Versions
LTC1516 Micropower, Regulated 5V Charge Pump DC/DC Converter I
OUT
= 20mA (V
IN
≥ 2V), I
OUT
= 50mA (V
IN
≥ 3V)
LTC1517-5 Micropower, Regulated 5V Charge Pump DC/DC Converter LTC1522 Without Shutdown and
Packaged in SOT-23
LTC1522 Micropower, Regulated 5V Charge Pump DC/DC Converter I
OUT
= 20mA (V
IN
≥ 3V), I
Q
= 6µA
LTC1550-4.1 Low Noise, Charge Pump Voltage Inverter 1mV
P-P
Ripple at 900kHz
LTC660 100mA Charge Pump DC/DC Converter 5V to –5V at 100mA
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
CIN
RIN
DATA
DDRV
EN
FB
DV
CC
SS
M1
M0
CLK
RST
I/O
V
CC
5V ±5%
I
VCC
≤ 10mA
CLK
RST
I/O
LDO
V
CC
V
IN
C1
+
C1
–
GND
GND
0.1µF
10µF
LTC1556
3V GSM
CONTROLLER SIM
V
IN
2.7V TO 10V
3V
10µF
1555/56 TA02
V
CC
GND
+
10µF
4.3V
50mA
AUXILIARY LDO/POWER SWITCH
(FREQUENCY SYNTHESIZER)
+
TYPICAL APPLICATION
U
SIM Interface with Auxilary Power