Linear Technology/Analog Devices' LT8603IUJPBF is a quad (4) output that combines two (2) high input, step-down switching regulators, one (1) low input step-down regulator, and a boost controller. With the boost controller configured to supply the chip VIN supply, the LT8603IUJPBF produces three precisely regulated outputs even when the boost input voltage falls significantly below the regulated output voltages, such as during an automotive cold crank scenario. Alternatively, with the boost controller driven from one of the step-down regulator outputs or configured as a SEPIC, the LT8603IUJPBF provides four precisely regulated outputs over a wide input voltage range. The LT8603IUJPBF provides robust regulation by including a cycle-by-cycle current limit for all step-down regulators, thermal shutdown, and a boost controller that can tolerate reverse battery connections and negative transient input voltages down to -42 V. The LT8603IUJPBF is ideal for automotive stop-start/cold crank ride through, industrial controls, and power supply applications.
Feature
- Flexible Power Supply System Capable of Four Regulated Outputs with VBATT << VOUT
- Two High Voltage Synchronous Buck Regulators
- 3V to 42V Input Voltage Range
- Output Currents Up to 2.5A and 1.5A
- One Low Voltage Synchronous Buck Regulator
- 2.6V to 5.5V Input Voltage Range
- Output Currents Up to 1.8A
- One Boost Controller Allows Buck Converters to Regulate with VBATT << VOUT
- Selectable Burst Mode® Operation Allows Low 28µA IQ with High Voltage Channels Active
- Programmable Power-On Reset
- Individual Channel Power Good Indicators
- Step-Down Switching Frequency: 250kHz to 2.2MHz
- Available in 40-Lead QFN (6mm × 6mm) Package
- AEC-Q100 Qualified for Automotive Applications
Applications
- Automotive Stop-Start and Cold Crank Ride Through
- Last-Gasp CPU Power Hold-Up
- Industrial Controls and Power Supplies
