This datasheet introduces the LTC4101, a single chip smart battery charger controller that is 100% compliant (Rev. 1.1) SMBus support that allows operation with or without a host. It has up to 4A charging current capability, high efficiency synchronous buck charger, VBAT optimized 3V to 5.5V, SMBus accelerator improves SMBus timing, hardware interrupt and SMBAlert response eliminate interrupt polling, 0.5V dropout voltage, maximum duty cycle>98%, AC adapter current limit maximizes charge rate, ±0.8% voltage accuracy, ±4% current accuracy, 10-bit DAC for charge current programming, 11-bit DAC for charger voltage programming, user-selectable overvoltage and overcurrent limits, high noise immunity SafetySignal sensor, 24-pin SSOP package.
The LTC4101 Smart Battery Charger Controller is a single‑chip solution that simplifies the design of SBS‑compliant charging systems. It features a synchronous buck charger, SMBus accelerator, and programmable over‑voltage and over‑current limits, allowing operation with or without a host controller.
The device is supplied in a 24‑lead plastic SSOP package and includes detailed electrical characteristics, pin functions, and typical application circuits. It supports a DC input range of 6 V to 28 V, operates from –40 °C to 85 °C, and provides SMBALERT interrupt signaling for host communication.
| Maximum Charging Current | 4 A |
|---|---|
| Operating Temperature Range | -40 °C to 85 °C |
| Package Type | 24‑Lead Plastic SSOP |
| SMBALERT Output | Active‑low interrupt (Pin 7) |
The LTC4101 can provide up to 4 A of charging current.
Pin 7 is the SMBALERT pin, an active‑low interrupt output to the host.
The device is supplied in a 24‑lead plastic SSOP package.