MAX8903A

PRODUCTION

2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power

Delivers 4MHz Switching

Data Sheet (Rev. 5) Product Selection Table
Part Models
2
1ku List Price
Starting From $3.68
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Part Details

  • Efficient DC-DC Converter Eliminates Heat
  • 4MHz Switching for Tiny External Components
  • Instant On—Works with No Battery or Low Battery
  • Dual Current-Limiting Inputs—AC Adapter or USB
    • Automatic Adapter/USB/Battery Switchover to Support Load Transients
    • 50mΩ System-to-Battery Switch
    • Supports USB Spec
  • Thermistor Monitor
  • Integrated Current-Sense Resistor
  • No External MOSFETs or Diodes
  • 4.1V to 16V Input Operating Voltage Range
MAX8903A
2A 1-Cell Li+ DC-DC Charger for USB and Adapter Power
MAX8677A is an integrated 1-cell Li+ charger and Smart Power Selector™ with dual (DC & USB) power inputs | Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

Design Note 1

Technical Articles 2

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Evaluation Kits

MAX8903AEVKIT

Evaluation Kit for the MAX8903A, MAX8903B, MAX8903C, MAX8903D, and MAX8903Y

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Features and Benefits

  • DC-DC Converter Output Current-Limit Adjustment Range of 0.5A to 2A (EV Kit Standard Configuration: 2A)
  • Battery Charger Current-Limit Adjustment Range of 0.5A to 2A (EV Kit Standard Configuration: 1A)
  • USB Current Limit of 100mA or 500mA
  • Efficient 4MHz Switching DC-DC Converter Powers System Load and Charger
  • Instant On—Works with No Battery or Low Battery
  • 28-Pin, 4mm x 4mm Thin QFN Package with Exposed Pad
  • Fully Assembled and Tested

Product Details

The MAX8903A evaluation kit (EV kit) is a fully assembled and tested circuit board for evaluating the 2A, 1-cell Li+ DC-DC battery charger. The EV kit charges a single-cell lithium-ion (Li+) battery from a DC input (AC adaptor) or a USB 100mA/500mA source and provides system power from the DC input, USB input, or battery. Battery charge current and SYS current limit are independently set. Charge current and DC converter output current limit can be set up to 2A, respectively. The USB input current can be set to 100mA or 500mA and USB suspend mode is also supported. Power not used by the system is available to charge the battery.

The EV kit comes standard with the MAX8903A installed. However, the EV kit can also be used to evaluate the MAX8903B–MAX8903E and MAX8903Y by replacing the MAX8903A (U1) with the preferred IC.

Applications

  • Mobile Internet Devices
  • PDA, Palmtop, and Wireless Handhelds
  • Personal Navigation Devices
  • Portable Multimedia Players
  • Smart Cell Phones
  • Ultra Mobile PCs
MAX8903AEVKIT
Evaluation Kit for the MAX8903A, MAX8903B, MAX8903C, MAX8903D, and MAX8903Y

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