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L5963 is a dual step-down switching regulator with internal power switches, high side driver and a low drop-out linear regulator that can operate as standby regulator or normal LDO.
All the regulators can be connected directly to the vehicle battery. In addition to an adjustable voltage detector, voltage supervisors are available.
The two DC-DC converters can work in free-run condition or synchronize themselves to an external clock. DC/DCs' PWM outputs have a 180° phase shift.
The high operating frequency allowed by the synchronization input helps to reduce AM and FM interferences and grants the use of small and low cost inductors and capacitors.
This IC finds application in the automotive segment, where load dump protection and wide input voltage range are mandatory.
A slug-up package option is available for applications which require heatsink use.
In standby condition the device guarantees extremely low quiescent current (25 μA typical @ -40 °C < T < 85 °C)Key Features
- AEC-Q100 qualified
- Two step-down synchronous switching voltage regulators with internal power switches:
- Wide input voltage range (from 3.5 V to 26 V)
- Internal high-side/ low-side NDMOS
- 1 V minimum output
- 3.0 A load current
- 250 kHz free-run frequency
- 250 kHz < f < 2 MHz 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
- 250 mA maximum current capability
- Backup function
- Power good function
- One high side driver
- 0.5 V max drop @ 0.5 A
- 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 (VDIN)
- 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
Sample & Buy
| Part Number | Package | Packing Type | Temperature (°C) | Marketing Status | Budgetary Price (US$)* | Quantity | ECCN (US) | Country of Origin | More info | Order from Distributors | Order from ST | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L5963DN-EHX | PowerSSO 36 | Tube | -40 | 105 |
Active
|
2.4 | 1000 | EAR99 | ITALY | No availability of distributors reported, please contact our sales office | ||
| L5963U-KBX | PowerSSO 36 | Tube | -40 | 105 |
Active
|
2.4 | 1000 | EAR99 | - | No availability of distributors reported, please contact our sales office | ||
| L5963Q-V0T | VFQFPN 48 7x7x1.0 | Tape And Reel | -40 | 105 |
Active
|
2.6 | 1000 | EAR99 | MALAYSIA | No availability of distributors reported, please contact our sales office | ||
| L5963Q-V0Y | VFQFPN 48 7x7x1.0 | Tray | -40 | 105 |
Active
|
2.6 | 1000 | EAR99 | MALAYSIA | Check Availability | Buy now | |
| L5963DN-EHT | PowerSSO 36 | Tape And Reel | -40 | 105 |
Active
|
2.4 | 1000 | EAR99 | MALAYSIA | Check Availability | Buy now | |
| L5963U-KBT | PowerSSO 36 | Tape And Reel | -40 | 105 |
Active
|
2.4 | 1000 | EAR99 | - | No availability of distributors reported, please contact our sales office | ||
L5963DN-EHX
Package
PowerSSO 36Packing Type
TubeUnit Price (US$)
2.4*L5963U-KBX
Package
PowerSSO 36Packing Type
TubeUnit Price (US$)
2.4*L5963Q-V0T
Package
VFQFPN 48 7x7x1.0Packing Type
Tape And ReelUnit Price (US$)
2.6*L5963U-KBT
Package
PowerSSO 36Packing Type
Tape And ReelUnit Price (US$)
2.4*(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors
Evaluation Tools
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L5963DN-EHT |
Active
|
PowerSSO 36 | Automotive | Ecopack2 | |
| L5963DN-EHX |
Active
|
PowerSSO 36 | Automotive | Ecopack2 | |
| L5963Q-V0T |
Active
|
VFQFPN 48 7x7x1.0 | Automotive | Ecopack2 | |
| L5963Q-V0Y |
Active
|
VFQFPN 48 7x7x1.0 | Automotive | Ecopack2 | |
| L5963U-KBT |
Active
|
PowerSSO 36 | Automotive | Ecopack2 | |
| L5963U-KBX |
Active
|
PowerSSO 36 | Automotive | Ecopack2 |
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
