TK119xx
VOLTAGE REGULATOR WITH RESET OUTPUT
FEATURES
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Very Low Dropout Voltage
Reset Output for Microprocessor
Very Low Quiescent Current (No Load)
Internal Thermal/Overload Shutdown
Low Noise Voltage
Input and Output Voltage Sense
±
2.5 % Output Voltage Accuracy
CMOS or TTL On/Off Control
High Speed On/Off Transient (50
µ
s typ.)
FEATURES
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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 TK119xx series are low power, linear regulators with
built-in electronic switches. Built-in voltage comparators
provide a reset logic ”low” level whenever the input or
output voltage falls outside internally preset limits. The
internal electronic switch can be controlled by CMOS or
TLL levels. The device is in the “off” state when the control
pin is biased “high”.
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
(130
µA)
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. The current consumption in the “off” mode is 65
µA.
An internal thermal shutdown circuit limits the junction
temperature to below 150
o
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 output
noise is very low at 100 dB down from V
OUT
when an
external noise bypass capacitor is used. The TK119xx is
available in a miniature SOT-23L surface mount package.
VIN
TK119xx
NOISE
BYPASS
01S
VIN
GND
CONTROL
RESET
OUTPUT
VOUT
BLOCK DIAGRAM
VOUT
RESET
OUTPUT
ORDERING INFORMATION
CONTROL
SHUT
DOWN
THERMAL
PROTECTION
ERROR
DETECTION
TK119
M
Tape/Reel Code
Voltage Code
BANDGAP
REFERENCE
VOLTAGE CODE
22 = 2.25 V
27 = 2.75 V
30 = 3.00 V
32 = 3.25 V
35 = 2.5 V
40 = 4.0 V
48 = 4.8 V
50 = 5.0 V
TAPE/REEL CODE
TL: Tape Left
NOISE
BYPASS
GND
January 1999 TOKO, Inc.
Page 1
TOKO [ TOKO, INC ]
