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TC1187VCT Datasheet

  • TC1187VCT

  • 50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown

  • 16頁

  • MICROCHIP   MICROCHIP

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TC1070/TC1071/TC1187
50mA, 100mA and 150mA Adjustable CMOS LDOs with Shutdown
Features
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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
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碌A at full load (20 to 60 times lower than in bipolar
regulators).
The devices鈥?key features include ultra low noise
operation, very low dropout voltage 鈥?typically 85mV
(TC1070); 180mV (TC1071); and 270mV (TC1187) at
full load, and fast response to step changes in load.
Supply current is reduced to 0.5碌A (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 1碌F 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.
Applications
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Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular/GSM/PHS Phones
Linear Post-Regulators for SMPS
Pagers
Typical Application
V
IN
1
V
IN
V
OUT
5
C1 +
1碌F
V
OUT
Device Selection Table
Part Number
TC1070VCT
TC1071VCT
TC1187VCT
Output
Voltage
(V)
Package
Junction
Temp. Range
Adjustable 5-Pin SOT-23A -40擄C to +125擄C
Adjustable 5-Pin SOT-23A -40擄C to +125擄C
Adjustable 5-Pin SOT-23A -40擄C to +125擄C
2
TC1070
TC1071
TC1187
GND
R1
Package Type
5-Pin SOT-23A
V
OUT
5
ADJ
4
3
SHDN
ADJ
4
R2
Shutdown Control
(from Power Control Logic)
V
OUT
= V
REF
x
[
R1 +1
]
R2
TC1070
TC1071
TC1187
1
V
IN
2
GND
3
SHDN
NOTE:
5-Pin SOT-23A is equivalent to the EIAJ (SC-74A)
2002 Microchip Technology Inc.
DS21353B-page 1
漏

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