Dual Input USB/AC Adapter Li-Ion Battery Charger with 600mA Buck Converter The LTC3550EDHC-1#PBF is a highly integrated power management IC (PMIC) manufactured by Linear Technology (now part of Analog Devices). Below are the factual specifications, descriptions, and features from Ic-phoenix technical data files:
### **Specifications:**
- **Manufacturer:** Linear Technology (LT)
- **Part Number:** LTC3550EDHC-1#PBF
- **Package:** 20-Lead DFN (5mm x 4mm)
- **Input Voltage Range:** 4.35V to 5.5V (USB-compatible)
- **Battery Charger:**
- Programmable charge current up to 950mA
- Supports Li-Ion/Polymer batteries
- Thermal regulation for safe charging
- **Buck Regulator:**
- 1.5A synchronous step-down DC/DC converter
- Output voltage adjustable from 0.8V to 5V
- Up to 95% efficiency
- **LDO Regulator:**
- 150mA low-dropout linear regulator
- Fixed or adjustable output (1.5V to 5V)
- **Power Path Management:**
- Seamless transition between battery and input power
- Ideal diode for low-loss power switching
- **Operating Temperature Range:** -40°C to +85°C
### **Descriptions:**
The LTC3550EDHC-1#PBF is a compact, high-efficiency power management solution designed for portable USB-powered applications. It integrates a battery charger, a synchronous buck regulator, and an LDO regulator, making it suitable for space-constrained designs. The IC supports USB compliance with input overvoltage protection (OVP) and thermal regulation for safe charging.
### **Features:**
- **Integrated Power Management:** Combines a battery charger, buck regulator, and LDO in a single package.
- **USB Input Compatibility:** Works with standard USB power sources (4.35V–5.5V).
- **Programmable Charging:** Adjustable charge current with thermal regulation.
- **High-Efficiency Buck Converter:** 1.5A output with synchronous rectification.
- **Low Quiescent Current:** Optimized for battery-powered applications.
- **Power Path Control:** Allows system operation even with a deeply discharged battery.
- **Compact Form Factor:** 20-lead DFN package (5mm x 4mm).
This information is strictly based on the manufacturer's datasheet and technical documentation.
