TK111xxM
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
s
High Voltage Precision at
±
2.0% or
±
60 mV
s
Active High On/Off Control
s
Very Low Dropout Voltage (85 mV at 30 mA)
s
Very Low Noise
s
Miniature Package (SOT-23L-6)
s
Internal Thermal Shutdown
s
Short Circuit Protection
s
Excellent Ripple Rejection (70 dB @ 1 kHz)
s
Reverse Bias Protection
APPLICATIONS
s
Battery Powered Systems
s
Cellular Telephones
s
Pagers
s
Personal Communications Equipment
s
Portable Instrumentation
s
Portable Consumer Equipment
s
Radio Control Systems
s
Toys
DESCRIPTION
The TK111xxM 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 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.
The TK111xxM is available in a miniature SOT-23L-6
surface mount package.
TK111xxM
CONTROL
20P
VIN
GND
GND
NOISE BYPASS
VOUT
ORDERING INFORMATION
BLOCK DIAGRAM
TK111
Voltage Code
M L
Tape/Reel Code
Temp Code
Product Code
PACKAGE CODE
M: SOT-23L-6
NOTE 1:
2.0 V to 2.3 V available
in C temperature code
(-30 to +80
°C)
only.
VIN
VOUT
THERMAL
PROTECTION
VOLTAGE CODE
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
TAPE/REEL CODE
L: Tape Left
CONTROL
TEMP. CODE:
C: -30 to +80
°C
I: -40 to +85
°C
BANDGAP
REFERENCE
GND
NOISE
BYPASS
March 1999 TOKO, Inc.
Page 1
TOKO [ TOKO, INC ]
