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TK11447BX Datasheet

  • TK11447BX

  • VOLTAGE REGULATOR WITH ON/OFF SWITCH

  • 24頁

  • TOKO   TOKO

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TK114xx
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
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Low Dropout Voltage
Electronic ON/OFF Switch
Very Low Standby Current (ON, No Load)
Internal Thermal Shutdown
Short Circuit Protection
Very Low (<100 nA) Current in OFF Mode
Customized Versions Are Available
APPLICATIONS
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Battery Powered Systems
Cellular Telephones
Pagers
Personal Communications Equipment
Portable Instrumentation
Portable Consumer Equipment
Radio Control Systems
Toys
Low Voltage Systems
DESCRIPTION
The TK114xx is a low power, linear regulator with a built-
in electronic switch. The internal electronic switch can be
controlled by an external pull-up resistor and an open drain
or open collector transistor. The device is in the OFF state
when the control pin is biased from V
IN
through the pull-up
resistor.
An internal PNP pass-transistor is used in order to achieve
low dropout voltage (typically 200 mV at 50 mA load
current). The device has very low quiescent current (500
碌A)
in the ON mode with no load and 2 mA with 30 mA load.
The quiescent current is typically 4 mA at 60 mA load. An
internal thermal shutdown circuit limits the junction tem-
perature to below 150
擄C.
The load current is internally
monitored and the device will shut down (no load current)
in the presence of a short circuit at the output. The device
is available in a small SOT-23L surface mount package.
TK114xxM
R3
CONTROL
1
2
6
5
4
V
IN
GND 3
V
O
KT114xxM.PO
BLOCK DIAGRAM
ORDERING INFORMATION
TK114
Tape/Reel Code
Voltage Code
V
IN
1
S
S
S
S
8
V
O
HIGH
CONTROL 2
(HC)
THERMAL
PROTECTION
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鈥?/div>
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+
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+
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VOLTAGE CODE
30 = 3.0 V
32 = 3.25 V
35 = 3.5 V
37 = 3.75 V
40 = 4.0 V
45 = 4.5 V
47 = 4.75 V
50 = 5.0 V
55 = 5.5 V
57 = 5.75 V
60 = 6.0 V
80 = 8.0 V
TAPE/REEL CODE
BX : Bulk/Bag
TL : Tape Left
LOW
CONTROL 3
(LC)
S
TK114xx
BANDGAP
REFERENCE
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January, 1995 TOKO, Inc.
11-20-94
鈥?/div>
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6
GND
KT114xx 鈥?BD
Page 1

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