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TC2054 Datasheet

  • TC2054

  • 50mA, 100mA, and 150mA CMOS LDOs with Shutdown and Error Out...

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  • MICROCHIP   MICROCHIP

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TC2054/2055/2186
50mA, 100mA, and 150mA CMOS LDOs
with Shutdown and Error Output
Features
鈥?Very Low Supply Current (55碌A(chǔ) Typ.) for Longer
Battery Life
鈥?Very Low Dropout Voltage: 140mV (Typ.) @
150mA
鈥?High Output Voltage Accuracy: 鹵0.4% (Typ)
鈥?Standard or Custom Output Voltages
鈥?Power-Saving Shutdown Mode
鈥?ERROR Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
鈥?Fast Shutdown Reponse Time: 60碌sec (Typ)
鈥?Over-Current Protection
鈥?Space-Saving 5-Pin SOT-23A Package
鈥?Pin Compatible Upgrades for Bipolar Regulators
General Description
The TC2054, TC2055 and TC2186 are high accuracy
(typically 鹵0.4%) CMOS upgrades for older (bipolar)
low dropout regulators. Designed specifically for bat-
tery-operated systems, the devices鈥?total supply current
is typically 55碌A(chǔ) at full load (20 to 60 times lower than
in bipolar regulators).
The devices鈥?key features include ultra low noise oper-
ation, very low dropout voltage - typically 45mV
(TC2054); 90mV (TC2055); and 140mV (TC2186) at
full load - and fast response to step changes in load. An
error output (ERROR) is asserted when the devices are
out-of-regulation (due to a low input voltage or exces-
sive output current). Supply current is reduced to 0.5碌A(chǔ)
(max) and both V
OUT
and ERROR are disabled when
the shutdown input is low. The devices also incorporate
over-current protection.
The TC2054, TC2055 and TC2186 are stable with a
low esr ceramic output capacitor of 1碌F and have a
maximum output current of 50mA, 100mA and 150mA,
respectively. This LDO Family also features a fast
response time (60碌sec typically) when released from
shutdown.
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular / GSMS / PHS Phones
Pagers
Typical Application
1
5
1碌F
Device Selection Table
Part Number
TC2054-xxVCT
TC2055-xxVCT
TC2186-xxVCT
Note:
Package
5-Pin SOT-23A*
5-Pin SOT-23A*
5-Pin SOT-23A*
Junction Temp.
Range
-40擄C to +125擄C
-40擄C to +125擄C
-40擄C to +125擄C
2
GND
V
IN
V
IN
V
OUT
V
OUT
1碌F
*5-Pin SOT-23A is equivalent to EIAJ (SC-74A).
3
Shutdown Control
(from Power Control Logic)
SHDN
TC2054
TC2055
TC2186
4
1M
Package Type
V
OUT
5
ERROR
4
ERROR
ERROR
TC2054
TC2055
TC2186
1
2
3
V
IN
GND SHDN
5-Pin SOT-23A*
TOP VIEW
2002 Microchip Technology Inc.
DS21663B-page 1
漏

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