MAX1775
PRODUCTIONDual-Output Step-Down DC-DC Converter for PDA/Palmtop Computers
Dual-Output Step-Down Converter For PDA's and Palmtop Computers
- Part Models
- 2
- 1ku List Price
- Starting From $5.48
Overview
- Dual, High-Efficiency, Synchronous Rectified Step-Down Converter
- Main Power
- Adjustable from +1.25V to +5.5V
- Over 2A Load Current
- Up to 95% Efficiency
- Core Power
- Adjustable from 1V to 5V
- Internal Switches
- Up to 1.5A Load Current
- Up to 92% Efficiency
- 100% (max) Duty Cycle
- Up to 1.25MHz Switching Frequency
- Input Voltage Range from +2.7V to +28V
- 170µA Quiescent Current
- 5µA Shutdown Current
- Digital Soft-Start
- Independent Shutdown Inputs
The MAX1775 dual, step-down DC-DC converter generates both the main (+3.3V at over 2A) and core (+1.8V at up to 1.5A) supplies for a complete power solution for PDAs, subnotebooks, and other hand-held devices. The main output is adjustable from +1.25V to +5.5V. The core output is adjustable from 1V to 5V. Both switching converters operate at up to 1.25MHz for small external components and use synchronous rectifiers to achieve efficiencies up to 95%. Operation with up to 100% duty cycle provides the lowest possible dropout voltage to extend useful battery life.
The MAX1775 accepts inputs from +2.7V up to +28V, allowing use with many popular battery configurations as well as AC-DC wall adapters. Digital soft-start reduces battery current surges at power-up. Both the main and core converters have separate shutdown inputs. The MAX1775 comes in a small 16-pin QSOP package.
The MAX1775 evaluation kit is available to help reduce design time.
Applications
- Handheld Computers
- Internet Access Tablets
- PDAs
- POS Terminals
- Subnotebooks
Documentation
Data Sheet 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1775EEE+ | QSOP | ||
| MAX1775EEE+T | QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX1775EEE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Can't find the software or driver you need?
Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Battery Charger ICs 1 | ||
| MAX1774 | PRODUCTION | Dual, High-Efficiency, Step-Down Converter with Backup Battery Switchover |
Evaluation Kits
Evaluation Kit for the MAX1775
Reference Designs
MAXREFDES38#: ECT/EPT Current Fault Sensor