TK73200 Datasheet, PDF (1/12 Pages) TOKO, Inc – ADJUSTABLE LOW DROPOUT REGULATOR

TK73200
ADJUSTABLE LOW DROPOUT REGULATOR
FEATURES
s Up to 5 A Output Current Capability with External
PNP Transistor
s Internal Short Circuit Protection
s Excellent Load Regulation
s CMOS/TTL-Compatible On/Off Switch
s Internal Reverse Bias Current Protection Switch
s Internal Thermal Shutdown
s Wide Adjustable Output Voltage Range
(2.0 V to 12.0 V)
s Continuous and Pulsed Current Modes
DESCRIPTION
APPLICATIONS
s Battery Powered Systems
s Cellular/Cordless Telephones
s Radio Control Systems
s Wireless Communications Systems
s Portable Instrumentations
s Portable Computers
s Personal Digital Assistants
s Local Area Network (LAN) Receivers
s Power Recovery for Microprocessors
The TK73200 is a controller IC for an adjustable low
dropout voltage regulator. The TK73200 and the external
PNP power transistor provide adjustable output voltages
from 2 to 12 V and output current from 100 mA to 5 A. By
utilizing an external PNP power transistor, low dropout
voltage at high current can be readily achieved. The
internal electronic switch can be controlled by TTL or
CMOS logic levels. The device is in the “on” state when the
control pin is pulled to a high logic level. A pin for a bypass
capacitor, which connects to the internal circuitry, is
provided to lower the overall output noise level.
The current limit characteristics can be configured as
continuous (constant current) or pulsed (cycling). An
internal thermal shutdown circuit limits the junction
temperatures to below 150 °C.
TK73200
CONTROL
NOISE
BYPASS
CPULSE
VIN
BASE
VADJ
GND
IPK
ORDERING INFORMATION
TK73200M L
BLOCK DIAGRAM
VIN
IPK
CPULSE
BASE
VADJ
ON/OFF
CIRCUIT
THERMAL
SENSOR
Package Code
Tape/Reel Code
Temp. Code
TAPE/REEL CODE PACKAGE CODE
L: Tape Left
M: SOT23L-8
TEMP. RANGE
C: -30 to 80 °C
CONTROL
BANDGAP
REFERENCE
GND
NOISE BYPASS
June 1999 TOKO, Inc.
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