onsemi FAN53745 Synchronous Buck Regulator
onsemi FAN53745 Synchronous Buck Regulator is a low quiescent current step-down DC-DC converter that delivers a regulated output voltage from an input supply of 2.3V to 5.5V. The combination of built-in power transistors, synchronous rectification, and a tiny solution size makes the device ideal for portable applications.
The converter typically operates in PWM mode at a fixed frequency of 3.33MHz. At moderate and light loads, the device will transition into PFM Mode to maintain high efficiency and an excellent transient response. Additionally, a low-power shutdown mode reduces power consumption when the device is disabled.
The onsemi FAN53745 is available in a 6-bump, 0.4mm pitch, wafer-level chip-scale package (WLCSP).
Features
- Proprietary Current Mode architecture
- Wide 2.3V to 5.5V input voltage range
- 1A load capability
- PFM/PWM modes for high efficiency
- I2C-compatible interface
- 0.9V to 3.3V programmable output voltage range
- 440mA to 2090mA programmable current limit range
- Internal soft-start
- Protection faults (OT, input UVLO, output short, and reverse current)
- Automatic pass-through operation
- Hardware reset when holding SCL low
- Pb-free and RoHS-compliant
Applications
- Smartphones
- Smart watches
- Health monitoring
- Sensor drives
- Energy harvesting
- Utility and safety modules
- RF modules
Block Diagram
發佈日期: 2025-09-30
| 更新日期: 2025-10-20