MAX8903A
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MAX8903A

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

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Delivers 4MHz Switching

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $3.68
Features
  • 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
Additional Details
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The MAX8903A–MAX8903E/MAX8903G/MAX8903H/MAX8903J/MAX8903N/MAX8903Y are integrated 1-cell Li+ chargers and Smart Power Selectors™ with dual (AC adapter and USB) power inputs. The switch mode charger uses a high switching frequency to eliminate heat and allow tiny external components. It 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. No external MOSFETs, blocking diodes, or current-sense resistors are required.

The MAX8903_ feature optimized smart power control to make the best use of limited USB or adapter power. Battery charge current and SYS output current limit are independently set. Power not used by the system charges the battery. Charge current and SYS output current limit can be set up to 2A while USB input current can be set to 100mA or 500mA. Automatic input selection switches the system from battery to external power. The DC input operates from 4.15V to 16V with up to 20V protection, while the USB input has a range of 4.1V to 6.3V with up to 8V protection.

The MAX8903_ internally block current from the battery and system back to the DC and USB inputs when no input supply is present. Other features include prequal charging and timer, fast charge timer, overvoltage protection, charge status and fault outputs, power-OK monitors, and a battery thermistor monitor. In addition, on-chip thermal limiting reduces battery charge rate and AC adapter current to prevent charger overheating. The MAX8903_ is available in a 4mm x 4mm, 28-pin thin QFN package.

The various versions of the MAX8903_ allow for design flexibility to choose key parameters such as system regulation voltage, battery prequalification threshold, and battery regulation voltage. The MAX8903B/MAX8903E/MAX8903G also includes power-enable on battery detection. See the Selector Guide section in the full data sheet for complete details.

Applications

  • Mobile Internet Devices
  • PDA, Palmtop, and Wireless Handhelds
  • Personal Navigation Devices
  • Portable Multimedia Players
  • Smart Cell Phones
  • Ultra Mobile PCs
Part Models 2
1ku List Price Starting From $3.68

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
MAX8903AETI+
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MAX8903AETI+T
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Product Lifecycle

PCN

Mar 9, 2023

- 2276A

WAFER FAB

MAX8903AETI+

PRODUCTION

MAX8903AETI+T

PRODUCTION

Jun 20, 2016

- 1612

ASSEMBLY

MAX8903AETI+

PRODUCTION

MAX8903AETI+T

PRODUCTION

Filter by Model

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Part Models

Product Lifecycle

PCN

Mar 9, 2023

- 2276A

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WAFER FAB

MAX8903AETI+

PRODUCTION

MAX8903AETI+T

PRODUCTION

Jun 20, 2016

- 1612

arrow down

ASSEMBLY

MAX8903AETI+

PRODUCTION

MAX8903AETI+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX8903AEVKIT

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

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MAX8903AEVKIT

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

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

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 Detail

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

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