參數(shù)資料
型號(hào)： TK11234BUCB
廠商： TOKO INC
元件分類： 基準(zhǔn)電壓源/電流源
英文描述： COVER METAL FOR KO SERIES SWITCH
中文描述： 3.4 V FIXED POSITIVE LDO REGULATOR, 0.39 V DROPOUT, PDSO5
封裝： SOT-89, 5 PIN
文件頁(yè)數(shù)： 1/24頁(yè)
文件大?。?/td> 157K
代理商： TK11234BUCB
October 1999 TOKO, Inc.
Page 1
TK112xxB
FEATURES
I
High Voltage Precision at
±
2.0%
I
Active High On/Off Control
I
Very Low Dropout Voltage 80 mV at 30 mA
I
Very Low Noise
I
Very Small SOT-23L or SOT-89 Surface Mount
Packages
I
Internal Thermal Shutdown
I
Short Circuit Protection
APPLICATIONS
I
Battery Powered Systems
I
Cellular Telephones
I
Pagers
I
Personal Communications Equipment
I
Portable Instrumentation
I
Portable Consumer Equipment
I
Radio Control Systems
I
Toys
I
Low Voltage Systems
BLOCK DIAGRAM
TK112xxB
GND
CONTROL
VOUT
VIN
NOISE BYPASS
GND
VOUT
GND
NOISE BYPASS
GND
CONTROL
VIN
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 “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
μ
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
μ
A 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
°
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.
ORDERING INFORMATION
TAPE/REEL CODE
L: Tape Left (SOT-23L)
B: Tape Left (SOT-89)
TEMP. CODE:
C: -30 to +80 C
I: -40 to +85 C
Tape/Reel Code
TK112 B
Voltage Code
Package Code
PACKAGE CODE:
M: SOT-23L
U: SOT-89
1.3 V to 1.9 V available
1.3 V to 2.4 V available
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
Temp. Code
20P
NOISE
VIN
VOUT
PTHERMAL
BANDGAP
CONTROL
GND
SOT-23L
SOT-89
VOLTAGE REGULATOR WITH ON/OFF SWITCH
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