TDA3608TH

Features:

General
` Two VP-state controlled regulators (regulator 1 and regulator 3) and a power switch
` Regulator 2 and reset circuit operate during load dump and thermal shutdown
` Separate control pins for switching regulator 1, regulator 3 and power switch
` Supply voltage range from -18 to +50 V
` Low reverse current of regulator 2
` Low quiescent current (when regulator 1, regulator 3 and power switch are switched off)
` Hold output circuit for regulator 1 (only valid when regulator 3 output voltage >1.3 V)
` Reset and hold outputs (open-collector outputs)
` Adjustable reset delay time
` High ripple rejection
` Backup capacitor connection to supply regulator 2 and reset circuit up to 25 V.
Protections
` Reverse polarity safe (down to -18 V without high reverse current)
` Able to withstand voltages up to 18 V at the outputs (supply line may be short circuited)
` ESD protection on all pins
` Thermal protection
` Load dump protection
` Foldback current limit protection for regulator 1, regulator 2 and regulator 3
` Delayed foldback current limit protection for power switch (at short-circuit); delay time fixed by reset delay capacitor
` All regulator outputs and power switch are DC short-circuited safe to ground and VP.

Pinout

Specifications

SYMBOL	PARAMETER	CONDITIONS	MIN.	MAX.	UNIT
VP	supply voltage	operating	-	18	V
		reverse polarity; non-operating	-	-18	V
		jump start for t 10 minutes	-	30	V
		load dump protection for t 50 ms and tr 2.5 ms	-	50	V
Ptot	total power dissipation		-	62	W
Tstg	storage temperature	non-operating	-55	+150
Tamb	ambient temperature	operating	-40	+85
Tj	junction temperature	operating	-40	+150

Description

The TDA3608TH is a multiple output voltage regulator with a power switch, intended for use in car radios with or without a microcontroller. TDA3608TH contains:

· Two fixed output voltage regulators with a foldback current protection (regulator 1 and regulator 3) and one fixed output voltage regulator (regulator 2) intended to supply a microcontroller, which also operates during load dump and thermal shutdown

· A power switch with protections, operated by an enable input

· Reset and hold outputs that can be used to interface with the microcontroller; the reset output can be used to call up the TDA3608TH and the hold output indicates that the regulator 1 output voltage is available and within the range

· A supply pin of TDA3608TH which can withstand load dump pulses and negative supply voltages

· Regulator 2 which is switched on at a backup voltage higher than 6.5 V and switched off when the regulator 2 output drops below 1.9 V

· A provision for the use of a reserve (backup) supply capacitor that will hold enough energy for regulator 2 (5 V continuous) to allow a TDA3608TH to prepare for loss of voltage.