TK112xxCM
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
n High Precision Voltage at ± 1.5% or ± 50 mV
n Active High On/Off Control
n Very Low Dropout Voltage: (VDROP = 105 mV at 100 mA)
n Very Good Stability: CL = 0.1 mF is Stable for any
Type Capacitor with VOUT ³ 1.8 V (IOUT > 0.5 mA)
n Excellent Ripple Rejection Ratio (80 dB @ 1 kHz)
n Very Low Quiescent Current (IQ = 65 mA at IOUT = 0 mA)
n Peak Output Current is 480 mA
n SOT23L-6 Surface Mount Package
n Very Low Noise
n Built-in Reverse Bias Protection
n Internal Thermal Shutdown
n Short Circuit Protection
APPLICATIONS
n Battery Powered Systems
n Cellular Telephones
n Pagers
n Personal Communications Equipment
n Portable Instrumentation
n Portable Consumer Equipment
n Radio Control Systems
n Toys
n Low Voltage Systems
The TK112xxCM circuit features very high stability in both
DC and AC. An output capacitor of 0.1 mF provides stable
operation for VOUT ³ 2.5 V. Any type of capacitor can be
used; however, the larger this capacitor is, the better the
overall characteristics are. The ripple rejection ratio is 84 dB
at 400 Hz, and 80 dB at 1 kHz.
DESCRIPTION
The TK112xxC is a low dropout linear regulator with a built-
in electronic switch. The internal 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 logic high level. An
external capacitor can be connected to the noise bypass pin
to lower the output noise level to 30 µVrms.
An internal PNP pass transistor is used to achieve a low
dropout voltage of 170 mV (typ.) at 200 mA load current. The
TK112xxC has a very low quiescent current of 65 µA at no
load and 1.8 mA with a 100 mA load.The internal thermal
shut down circuitry limits the junction temperature to150 °C.
The load current is internally monitored and the device will
shut down in the presence of a short circuit or overcurrent
condition at the output.
The TK112xxC is available in the SOT23L-6 surface mount
package.
TK112xxC
CONTROL
01S
GND
NOISE BYPASS
VIN
GND
VOUT
BLOCK DIAGRAM
ORDERING INFORMATION
TK112 CM
Voltage Code
Package Code
Tape/Reel Code
Temp. Code
VIN
CONTROL
CONTROL CIRCUIT
CONSTANT
CURRENT
SOURCE
THERMAL
PROTECTION
BANDGAP
REFERENCE
VOUT
VOLTAGE CODE:
Refer toTable 1
PACKAGE CODE:
M: SOT23L-6
January 2002 TOKO, Inc.
TAPE/REEL CODE:
L: Tape Left
Reel Size = 1300 pcs.
TEMP. CODE:
C: -30 to +80°C
I: -40 to +85°C
GND
NOISE
BYPASS
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