TS4268

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


Application

TS4268 regulates an input voltage in the range 5.5V ~ 45V. In the event of an output voltage V_out < V_RT, a reset signal is generated. The wiring of the reset switching threshold input enables the value of V_RT 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 rovides a wide adjustment range for the pulse repetition time. The watchdog function is only activated if the load exceeds mA.This ensures that a microcontroller is not activated during power-down and the current drain is not increased.

Specifications

Parameter	Symbol	min.	max.	Unit	Notes
Input
Input voltage	Vin	-30	45	V
Input current	Iin	Internally limited
Reset Output
Voltage	Vres	-0.3	7	V
Current	Ires	Internally limited
Reset Delay
Voltage	VRD	-0.3	7	V
Current	IRD	Internally limited
Watchdog
Watchdog input	Vwi	-0.3	7	V
Reset Input
Reset threshold	VRT	-0.3	7	V
Output
Output voltage	Vout	-0.3	7	V
Output current	Iout	Internally limited
Ground
Current	Iq	-100	50	mA
Temperatures
Junction temperature	Tj	-40	150
Storage temperature	Tstg	-50	150
Operation Range
Parameter	Symbol	min.	max.	Unit	Notes
Input voltage	Vin	--	45
Junction temperature	Tj	-40	150
Thermal Resistance
Parameter	Symbol	min.	max.	Unit	Notes
Junction to ambient (soldered)	Rja	--	185	/W	(note 1)
Junction pin	Rjp	--	72	/W	(note 2)

1. Package mounted on PCB 80 x 80 x 1.5mm3, footprint only, zero airflow.
2. Measure to pin 2
Operation at up to the maximum junction temperature of 150°C is possible in principle. Note, however, operation at the maximum permitted rating could be affected the reliability of the device.


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 notinterrupted during sleep mode by a watchdog reset.