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TK11128S Datasheet(PDF) 1 Page - TOKO, Inc

Part # TK11128S
Description  VOLTAGE REGULATOR WITH ON/OFF SWITCH
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Manufacturer  TOKO [TOKO, Inc]
Direct Link  http://www.toko.com
Logo TOKO - TOKO, Inc

TK11128S Datasheet(HTML) 1 Page - TOKO, Inc

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March 1999 TOKO, Inc.
Page 1
TK111xxS
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-23-5)
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
BLOCK DIAGRAM
TK111xxS
DESCRIPTION
The TK111xxS 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
TK111xxS has a very low quiescent current of 140
µA
(typ.) at no load . The standby current is 100 nA maximum.
The internal thermal shut down 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 TK111xxS is available in a miniature SOT-23-5 surface
mount package.
TK111
S L
ORDERING INFORMATION
TAPE/REEL CODE
L: Tape Left
PACKAGE CODE
S: SOT-23-5
Tape/Reel Code
Voltage Code
VOLTAGE CODE
20 = 2.0 V
32 = 3.2 V
43 = 4.3 V
21 = 2.1 V
33 = 3.3 V
44 = 4.4 V
22 = 2.2 V
34 = 3.4 V
45 = 4.5 V
23 = 2.3 V
35 = 3.5 V
46 = 4.6 V
24 = 2.4 V
36 = 3.6 V
47 = 4.7 V
25 = 2.5 V
37 = 3.7 V
48 = 4.8 V
27 = 2.7 V
38 = 3.8 V
49 = 4.9 V
28 = 2.8 V
39 = 3.9 V
50 = 5.0 V
29 = 2.9 V
40 = 4.0 V
30 = 3.0 V
41 = 4.1 V
31 = 3.1 V
42 = 4.2 V
Package Code
Temp. Code
Note 1: 2.0 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
20P
GND
CONTROL
VOUT
VIN
NOISE BYPASS
NOISE
BYPASS
VIN
VOUT
THERMAL
PROTECTION
BANDGAP
REFERENCE
CONTROL
GND
5
VOLTAGE REGULATOR WITH ON/OFF SWITCH


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