Datasheet

8
LTC1522
1522f LT/TP 0198 4K • PRINTED IN USA
 LINEAR TECHNOLOGY CORPORATION 1997
TYPICAL APPLICATION
U
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
●
[phone]
FAX: [phone]
●
TELEX: 499-3977
●
www.linear-tech.com
PART NUMBER DESCRIPTION COMMENTS
LTC1144 20mA Switched Capacitor Converter for Up to 20V Inputs Includes Micropower Shutdown (8µA)
LTC1262 5V to 12V Regulated Switched Capacitor Converter Up to 30mA at Regulated Output
LTC1514/15 Step-Up/Step-Down Switched Capacitor DC/DC Converters V
IN
2V to 10V, V
OUT
is Fixed or Adjustable, I
OUT
to 50mA
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
LTC1555/56 SIM Power Supply and Level Translator Step-Up/Step-Down SIM Power Supply and Level Translators
LTC660 100mA CMOS Voltage Converter 5V to –5V Conversion with Low Voltage Loss
RELATED PARTS
1
2
7
4
8
3
6
5
NC
LTC1522
10µF
B
A
Q1
D1
0.22µF
V
CC
= 5V OR 3V
(SEE TRUTH TABLE)
D1 = BAS70-05
Q1 = Si6943DQ
TRUTH TABLE
A B V
CC

 0 0 NOT USED
 0 1 3V
 1 0 5V
 1 1 SHUTDOWN
+
10µF
R1
470k
+
1522 TA03
V
IN
SHDN
C
+
NC
V
OUT
GND
C
–
V
CC
SIM CARD
RST
CLK
I/O
GND
LEVEL SHIFT
3V
GSM
CONTROLLER
Programmable 5V/3V SIM Interface Supply for GSM Cellular Phones