TC1070_07 Datasheet, PDF (1/20 Pages) Microchip Technology – 50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown

TC1070/TC1071/TC1187
50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown
Features:
• 50 µA Ground Current for Longer Battery Life
• Adjustable Output Voltage
• Very Low Dropout Voltage
• Choice of 50 mA (TC1070), 100 mA (TC1071)
and 150 mA (TC1187) Output
• Power-Saving Shutdown Mode
• Over Current and Over Temperature Protection
• Space-Saving 5-Pin SOT-23 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
Typical Application
1
V_IN
V_IN
5
V_OUT
V_OUT
TC1070
C1 ⁺
TC1071
1 µF
TC1187
2 _GND
R1
3
SHDN
4
ADJ
R2
Shutdown Control
(from Power Control Logic)
[ ] ^VOUT ^{= V}REF ^x
R1
R2
+1
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
50 μA 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 85 mV
(TC1070); 180 mV (TC1071); and 270 mV (TC1187) at
full load, and fast response to step changes in load.
Supply current is reduced to 0.5 μA (maximum) 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 1 μF and have a maximum
output current of 50 mA, 100 mA and 150 mA,
respectively. For higher output versions, please see the
TC1174 (I_OUT = 300 mA) data sheet.
Package Type
5-Pin SOT-23
V_OUT
ADJ
5
4
TC1070
TC1071
TC1187
1
23
V_IN GND SHDN
© 2007 Microchip Technology Inc.
DS21353D-page 1