TK111xxM
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
APPLICATIONS
■ High Voltage Precision at ± 2.0% or ± 60 mV
■ Active High On/Off Control
■ Battery Powered Systems
■ Cellular Telephones
■ Pagers
■ Very Low Dropout Voltage (85 mV at 30 mA)
■ Very Low Noise
■ Personal Communications Equipment
■ Portable Instrumentation
■ Portable Consumer Equipment
■ Radio Control Systems
■ Toys
■ Miniature Package (SOT-23L-6)
■ Internal Thermal Shutdown
■ Short Circuit Protection
■ Excellent Ripple Rejection (70 dB @ 1 kHz)
■ Reverse Bias Protection
DESCRIPTION
TheTK111xxMisalowdropoutlinearregulatorwithabuilt-
in electronic switch. The internal switch can be controlled
byTTLorCMOSlogiclevels. Thedeviceisinthe“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.
TK111xxM
An internal PNP pass transistor is used to achieve a low
dropout voltage of 85 mV (typ.) at 30 mA load current. The
TK111xxM has a very low quiescent current of 140 µA
(typ.) at no load . The standby current is 100 nA maximum.
The internal thermal shutdown circuitry limits the junction
temperature to below 150 °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.
V
CONTROL
GND
IN
20P
GND
NOISE BYPASS
V
OUT
The TK111xxM is available in a miniature SOT-23L-6
surface mount package.
ORDERING INFORMATION
BLOCK DIAGRAM
TK111 M L
V
V
OUT
IN
Tape/Reel Code
Voltage Code
Temp Code
THERMAL
PROTECTION
Product Code
PACKAGE CODE
M: SOT-23L-6
VOLTAGE CODE
TAPE/REEL CODE
L: Tape Left
CONTROL
20 = 2.0 V
21 = 2.1 V
22 = 2.2 V
23 = 2.3 V
24 = 2.4 V
25 = 2.5 V
27 = 2.7 V
28 = 2.8 V
29 = 2.9 V
30 = 3.0 V
31 = 3.1 V
32 = 3.2 V
33 = 3.3 V
34 = 3.4 V
35 = 3.5 V
36 = 3.6 V
37 = 3.7 V
38 = 3.8 V
39 = 3.9 V
40 = 4.0 V
41 = 4.1 V
42 = 4.2 V
43 = 4.3 V
44 = 4.4 V
45 = 4.5 V
46 = 4.6 V
47 = 4.7 V
48 = 4.8 V
49 = 4.9 V
50 = 5.0 V
NOTE 1:
2.0 V to 2.3 V available
in C temperature code
(-30 to +80 °C) only.
TEMP. CODE:
C: -30 to +80 °C
I: -40 to +85 °C
BANDGAP
REFERENCE
GND
NOISE
BYPASS
March 1999 TOKO, Inc.
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