LTC1957-1EMS8#TR Linear Technology, LTC1957-1EMS8#TR Datasheet - Page 16

• Manufacturer Part Number: LTC1957-1EMS8#TR
• Description: IC RF PWR CONTRLLR SINGLE 8-MSOP
• Manufacturer: Linear Technology

Specifications of LTC1957-1EMS8#TR

• Rf Type: Cellular, GSM, GPRS, PCS, Wireless Modem, TDMA
• Frequency: 850MHz ~ 2GHz
• Features: Single Output
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: LTC1957-1EMS8TR

LTC1957-1/LTC1957-2
RELATED PARTS
PART NUMBER
LTC1261
LTC1550/LTC1551
LTC1730
LTC1732
LTC1734
LTC1758-1/LTC1758-2 RF Power Controllers
LT
LTC3200/LTC3200-5
ThinSOT is a trademark of Linear Technology Corporation.
16
TYPICAL
®
1761
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] FAX: [phone] www.linear-tech.com
Li-Ion
APPLICATION
V
IN
68
Li-Ion
DESCRIPTION
Regulated Inductorless Voltage Inverter
Low Noise Inductorless Voltage Inverter
Li-Ion Pulse Charger
Li-Ion Linear Charger
ThinSOT
ThinSOT LDO
Low Noise, Regulated Charge Pump
33pF
SHDN
V
IN
68
TM
33pF
Li-Ion Linear Charger
1
2
3
4
SHDN
Dual Band Cellular Telephone Transmitter Without Current Limiting
V
RF
SHDN
GND
IN
LTC1957-1
U
1
2
3
4
DAC
V
RF
SHDN
GND
IN
TXEN
PCTL
V
LTC1957-1
V
PCA
Single Band Cellular Telephone Transmitter
CC
DAC
8
7
6
5
TXEN
PCTL
V
V
PCA
CC
TXEN
8
7
6
5
COMMENTS
Regulated –5V from 3V, REG Pin Indicates Regulation, Up to 15mA, Micropower
Regulated Output, <1mV
Complete Pulse Charger for 1-Cell Li-Ion Battery
Complete Linear Charger for 1- and 2-Cell Li-Ion Battery
Only Two External Components, Allows Charge Current Monitoring for Termination
Single/Dual Channel RF Power Controllers
(Lower Bandwidth Version of LTC1957-1/LTC1957-2)
I
2MHz Constant Frequency, I
ThinSOT and MSOP Packages
OUT
TXEN
= 100mA, Low Noise: 20 V
RF IN
RF POWER MODULE WITH MUX
V
PWRCTRL
BANDSELECT
CC
900MHz
RF1 IN
RF PA
P-P
1800MHz
1800MHz
RF2 IN
RFOUT1
900MHz
RFOUT2
OUT
Ripple, 900kHz
RMS
= 100mA, 2.7V V
DIRECTIONAL
DIRECTIONAL
COUPLER
COUPLER
1957f LT/TP 0601 2K • PRINTED IN THE USA
LINEAR TECHNOLOGY CORPORATION 2001
IN
1957 TA02
50
4.5V,
DIPLEXER
1957 TA03