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TS4268 Datasheet(PDF) 1 Page - Taiwan Semiconductor Company, Ltd

Part # TS4268
Description  180mA Ultra Low Dropout Voltage Regulator with Reset & Watchdog Function
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Manufacturer  TSC [Taiwan Semiconductor Company, Ltd]
Direct Link  http://www.taiwansemi.com
Logo TSC - Taiwan Semiconductor Company, Ltd

TS4268 Datasheet(HTML) 1 Page - Taiwan Semiconductor Company, Ltd

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Preliminary
TS4268
180mA Ultra Low Dropout Voltage Regulator
with Reset & Watchdog Function
1/7
Version: Preliminary
SOP-8
General Description
TS4268 is a low dropout voltage regulator. The maximum input voltage is 45 V. It can deliver an output current of at
least 180mA. TS4268 is short circuit proof and features temperature protection that disables the circuit in the event of
impermissibly high temperatures. The watchdog function is disabled as a function of the load, so that a controller is not
interrupted during sleep mode by a watchdog reset.
Application Description
TS4268 regulates an input voltage in the range 5.5V ~ 45V. In the event of an output voltage Vout < VRT, a reset signal
is generated. The wiring of the reset switching threshold input enables the value of VRT to be reduced. The reset delay
time can be adjusted using an external capacitor. The integrated watchdog monitors the connected active controller. If
there is no positive going edge at the watchdog input, the reset output is set to low. The reset delay capacitor provides
a wide adjustment range for the pulse repetition time. The watchdog function is only activated if the load exceeds 8mA.
This ensures that a microcontroller is not activated during power-down and the current drain is not increased.
Features
Output voltage tolerance < ± 2 %
Very low current consumption
Low-drop voltage
Watchdog
Settable reset threshold
Over temperature protection
Reverse polarity protection
Short-circuit proof
Suitable for use in automotive electronics
Wide temperature range
Ordering Information
Part No.
Package
Packing
TS4268CS50 RL
SOP-8
2.5Kpcs/ 13” Reel
Pin Description
Pin No.
Symbol
Pin Description
1
IN
Input Voltage. block to ground directly with ceramic capacitor
2
N/C
Not Connected
3
RO
Reset Output. the open collector output is connected to the 5V output via an
integrated resistor of 30kΩ
4
GND
Ground
5
RD
Reset Delay. connect a capacitor to ground for delay time adjustment.
6
RADJ
Reset Switching Threshold. for setting the switching threshold, output to ground with
voltage divider. If this input is connected to ground, the reset is triggered at an output
voltage of 4.5V.
7
WI
Watchdog Input. positive-edge-triggered input for monitoring a microcontroller.
8
OUT
Output Voltage. block to ground with 22uF capacitor, ESR <3Ω
Pin Definition:
1. Input
8. Output
2. N/C
7. Watchdog
3. Reset Output 6. Radj
4. Ground
5. Reset Delay


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