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TK11224B Datasheet

  • TK11224B

  • VOLTAGE REGULATOR WITH ON/OFF SWITCH

  • 24頁

  • TOKO   TOKO

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TK112xxB
VOLTAGE REGULATOR WITH ON/OFF SWITCH
FEATURES
s
High Voltage Precision at
鹵
2.0%
s
Active High On/Off Control
s
Very Low Dropout Voltage 80 mV at 30 mA
s
Very Low Noise
s
Very Small SOT-23L or SOT-89 Surface Mount
Packages
s
Internal Thermal Shutdown
s
Short Circuit 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
s
Low Voltage Systems
DESCRIPTION
The TK112xxB 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 鈥渙n鈥?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
碌Vrms.
An internal PNP pass transistor is used to achieve a low
dropout voltage of 80 mV (typ.) at 30 mA load current. The
TK112xxB has a very low quiescent current of 170
碌A(chǔ)
at
no load and 1 mA with a 30 mA load. The standby current
is typically 100 nA. The internal thermal shut down circuitry
limits the junction temperature to below 150
擄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 TK112xxB is available in either a 6-pin SOT-23L or a
5-pin SOT-89 surface mount package.
TK112xxB
CONTROL
20P
VIN
GND
GND
NOISE BYPASS
SOT-23L
VOUT
NOISE BYPASS
VOUT
GND
VIN
GND
ORDERING INFORMATION
SOT-89
CONTROL
TK112
Voltage Code
Package Code
B
Tape/Reel Code
Temp. Code
VIN
VOUT
BLOCK DIAGRAM
VOLTAGE CODE
13 = 1.3 V
14 = 1.4 V
15 = 1.5 V
16 = 1.6 V
17 = 1.7 V
18 = 1.8 V
19 = 1.9 V
20 = 2.0 V
21 = 2.1 V
22 = 2.2 V
23 = 2.3 V
24 = 2.4 V
25 = 2.5 V
26 = 2.6 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
55 = 5.5 V
80 = 8.0 V
PACKAGE CODE:
M: SOT-23L
U: SOT-89
NOTE 1:
1.3 V to 1.9 V available
in SOT-23L package only.
TAPE/REEL CODE
L: Tape Left (SOT-23L)
B: Tape Left (SOT-89)
THERMAL
PROTECTION
TEMP. CODE:
C: -30 to +80 C
I: -40 to +85 C
CONTROL
NOTE 2:
1.3 V to 2.4 V available
in C temperature code
(-30 to +80 C) only.
BANDGAP
REFERENCE
GND
NOISE
BYPASS
October 1999 TOKO, Inc.
Page 1

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