TC1070 Datasheet, PDF (1/16 Pages) TelCom Semiconductor, Inc – 50mA ADJUSTABLE CMOS LDO WITH SHUTDOWN

TC1070/TC1071/TC1187
50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown
Features
• Zero Ground Current for Longer Battery Life
• Adjustable Output Voltage
• Very Low Dropout Voltage
• Choice of 50mA (TC1070), 100mA (TC1071) and
150mA (TC1187) Output
• Power-Saving Shutdown Mode
• Over Current and Over Temperature Protection
• Space-Saving 5-Pin SOT-23A Package
• Pin Compatible with Bipolar Regulators
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Device Selection Table
Part Number
Output
Voltage
(V)
Package
Junction
Temp. Range
TC1070VCT Adjustable 5-Pin SOT-23A -40°C to +125°C
TC1071VCT Adjustable 5-Pin SOT-23A -40°C to +125°C
TC1187VCT Adjustable 5-Pin SOT-23A -40°C to +125°C
Package Type
5-Pin SOT-23A
V_OUT
ADJ
5
4
TC1070
TC1071
TC1187
1
2
3
V_IN GND SHDN
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ (SC-74A)
General Description
The TC1070, TC1071 and TC1187 are adjustable
LDOs designed to supersede a variety of older (bipolar)
voltage regulators. Total supply current is typically
50µA at full load (20 to 60 times lower than in bipolar
regulators).
The devices’ key features include ultra low noise
operation, very low dropout voltage – typically 85mV
(TC1070); 180mV (TC1071); and 270mV (TC1187) at
full load, and fast response to step changes in load.
Supply current is reduced to 0.5µA (max) when the
shutdown input is low. The devices incorporate both
over-temperature and over-current protection. Output
voltage is programmed with a simple resistor divider
from V_OUT to ADJ to GND.
The TC1070, TC1071 and TC1187 are stable with an
output capacitor of only 1µF and have a maximum
output current of 50mA, 100mA and 150mA,
respectively. For higher output versions, please see the
TC1174 (I_OUT = 300mA) data sheet.
Typical Application
1
V_IN
V_IN
5
V_OUT
V_OUT
TC1070
C1 ⁺
TC1071
1µF
TC1187
2 _GND
R1
3
SHDN
4
ADJ
R2
Shutdown Control
(from Power Control Logic)
[ ] ^VOUT ^{= V}REF ^x
R1
R2
+1
© 2002 Microchip Technology Inc.
DS21353B-page 1