MAX8903BETI

Product Summary

The MAX8903BETI is a 2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power. The switch mode charger uses a high switching frequency to eliminate heat and allow tiny external components. The MAX8903BETI can operate with either separate inputs for USB and AC adapter power, or from a single input that accepts both. All power switches for charging and switching the load between battery and external power are included on-chip. The MAX8903BETI features optimized smart power control to make the best use of limited USB or adapter power. It is used in PDAs, Palmtops, and Wireless Handhelds, Personal Navigation Devices, Smart Cell Phones, Portable Multimedia Players, Mobile Internet Devices, Ultra Mobile PCs.

Parametrics

MAX8903BETI absolute maximum ratings: (1)DC, LX to GND: -0.3V to +20V; (2)DCM to GND: -0.3V to (VDC + 0.3V); (3)DC to SYS: -6V to +20V; (4)BST to GND: -0.3V to +26V; (5)BST TO LX: -0.3V to +6V; (6)USB to GND: -0.3V to +9V; (7)USB to SYS: -6V to +9V; (8)VL to GND: -0.3V to +6V; (9)THM, IDC, ISET, CT to GND: -0.3V to (VVL + 0.3V); (10)DOK, FLT, CEN, UOK, CHG, USUS, BAT, SYS, IUSB, CS to GND: -0.3V to +6V; (11)SYS to BAT: -0.3V to +6V; (12)PG, EP (exposed pad) to GND: -0.3V to +0.3V; (13)DC Continuous Current (total in two pins): 2.4ARMS; (14)USB Continuous Current: 1.6A; (15)Operating Temperature Range: -40℃ to +85℃; (16)Junction Temperature Range: -40℃ to +150℃; (17)Storage Temperature Range: -65℃ to +150℃; (18)Lead Temperature (soldering, 10s): +300℃; (19)Soldering Temperature (reflow): +260℃.

Features

MAX8903BETI features: (1)Efficient DC-DC Converter Eliminates Heat; (2)4MHz Switching for Tiny External Components; (3)Instant On—Works with No/Low Battery; (4)Dual Current-Limiting Inputs—AC Adapter or USB Automatic Adapter/USB/Battery Switchover to Support Load Transients; (5)Thermistor Monitor; (6)Integrated Current-Sense Resistor; (7)No External MOSFETs or Diodes; (8)4.1V to 16V Input Operating Voltage Range.

Diagrams