XR76108EL-F产品概述
The XR76108 and XR76112 are synchronous step-down regulators combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76108 has a load current rating of 8 A and the XR76112 has a load current rating of 12 A. A wide 5 V to 22 V input voltage range allows for single supply operation from industry standard 5 V, 12 V and 19.6 V rails.
With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR76108 and XR76112 provide extremely fast line and load transient response using ceramic output capacitors. They require no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop also provides 0.25% load and 0.1% line regulation and maintains constant operating frequency. A selectable power saving mode, allows the user to operate in discontinuous mode (DCM) at light current loads thereby significantly increasing the converter efficiency.
A host of protection features, including over-current, over-temperature, short-circuit and UVLO, help achieve safe operation under abnormal operating conditions.
The XR76108/12 are available in a RoHS-compliant, green/halogen-free space-saving QFN 5 x 5 mm package.
Features:
8 A and 12 A Capable Step Down Regulators
- 4.5 V to 5.5 V Low VIN Operation
- 5 V to 22 V Wide Single Input Voltage
- =0.6 V Adjustable Output Voltage
Controller, drivers, bootstrap diode and MOSFETs integrated in one package
Proprietary Constant On-Time Control
- No Loop Compensation Required
- Ceramic Output Cap. Stable operation
- Programmable 200 ns-2 μs On-Time
- Quasi Constant 200 Khz-800 Khz Freq.
- Selectable CCM or CCM/DCM Operation
Precision Enable and Power-Good Flag
Programmable Soft-start
5 x 5 mm 30-pin QFN Package
