STMicroelectronics L5963 Dual Monolithic Switching Regulator

STMicroelectronics L5963 Dual Monolithic Switching Regulator with LDO and HSD can operate as a standby regulator or a normal LDO. STMicroelectronics L5963 features internal power switches, a high side driver and a low dropout linear regulator. The regulators can connect directly to a vehicle battery. The synchronization input allows high operating frequency to reduce AM and FM interferences. L5963 is ideal for automotive applications where load dump protection and wide input voltage range are mandatory.

Features

Two step-down synchronous switching voltage regulators with internal power switches:
- 3.5V to 26V input voltage range
- Internal high-side/low-side NDMOS
- 1V minimum output
- 3.0A load current
- 250kHz free-run frequency
- 250kHz < f < 2MHz synchronization range
- Integrated soft-start
- Independent hardware enable pins
- Independent power supply
- 180° PWM output phase shift
- Programmable switching frequency divider by 1, 2, 4, or 8 between the two DC/DC regulators
- Power good function
One standby / linear regulator
- Output voltage programmable with external resistor divider
- 250mA maximum current capability
- Backup function
- Power good function

One high side driver
- 0.5V max drop @ 0.5A
- Protected against short to ground and battery, loss of ground and battery, unsupplied short to battery
Programmable under voltage battery detector
- Under voltage threshold adjustable through dedicated pin (VD_IN)
Load dump protection
Independent thermal protection on all regulators
Independent current limit on all regulators
Extremely low quiescent current in standby conditions
Power good / adjustable voltage detector outputs to realize customized power up/down sequences