TC572502 Microchip Technology, TC572502 Datasheet

no-image

TC572502

Manufacturer Part Number
TC572502
Description
(TC572502/3002/3302) Line Regulator Controller
Manufacturer
Microchip Technology
Datasheet
Features
• Low Dropout Voltage: 100mV @ 650mA with
• 2.7V to 8V Supply Range
• Low Operating Current: 50µA Operating,
• Low True Chip Enable
• Output Accuracy < ±2%
• Small Package: 5-Pin SOT-23A
Applications
• Battery Operated Systems
• Portable Instruments
• High-Efficiency Linear Regulator
• Post-Regulator for SMPS
• Power Supply or Battery Back-Up Supply for
Device Selection Table
Other output voltages and package options are available.
Please contact Microchip Technology Inc. for details.
Package Type
©
TC572502ECT
TC573002ECT
TC573302ECT
Part Number
NOTE: 5-Pin SOT-23A is equivalent to the EIAJ SC-74A.
FZT749 PNP Transistor
0.2µA Shutdown
Memory
2002 Microchip Technology Inc.
Voltage
SHDN
Output
GND
2.5V
3.0V
3.3V
5-Pin SOT-23A
1
5
TC57
5-Pin SOT-23A -40°C to +85°C
5-Pin SOT-23A -40°C to +85°C
5-Pin SOT-23A -40°C to +85°C
V
2
IN
Package
V
EXT
OUT
3
4
Line Regulator Controller
Temperature
Range
General Description
The TC57 is a low dropout regulator controller that
operates with an external PNP pass transistor, allowing
the user to tailor the LDO characteristics to suit the
application at hand. This results in lower dropout
operation (and often lower cost) compared with
traditional linear regulators with on-board pass
transistors. The maximum output current of a TC57-
based regulator circuit is limited only by the
characteristics of the external pass transistor. For
example, a maximum output current of 650mA (with a
dropout voltage of 100mV) results when an FZT749
pass transistor is used, while a Darlington configuration
can deliver up to 4A.
Flexibility, and superior performance make this family
of regulator controllers the ideal choice in applications
where low dropout voltage and low installed cost are
key.
Functional Block Diagram
(Tantalum)
3.3V Line Input, 3.0V, 500mA Output LDO
V
IN
10µF
+3.3V
C
IN
OFF
ON
R
47K
BE
2
5
FZT749
EXT
V
TC573002ECT
SHDN
Q1
IN
4
R
1K
B
GND
1
V
OUT
TC57
3
DS21437B-page 1
C
10µF
(Tantalum)
L
V
OUT
R
L
+3V

Related parts for TC572502

Related keywords