MAX1733
PRODUCTIONLow-Voltage, Step-Down DC-DC Converters in SOT23
High-Efficiency DC-DC Solution for Low-Voltage Logic Supplies
- Part Models
- 2
- 1ku List Price
- Starting From $2.86
Overview
- 250mA Guaranteed Output Current
- Synchronous Rectifier for Over 90% Efficiency
- Tiny 5-Pin SOT23 Package
- 40µA Quiescent Supply Current
- 0.01µA Logic-Controlled Shutdown
- Up to 1.2MHz Switching Frequency
- Fixed 1.8V or 1.5V Outputs (MAX1734)
- Adjustable Output Voltage (MAX1733)
- ±1.5% Initial Accuracy
- 2.7V to 5.5V Input Range
- Soft-Start Limits Startup Current
The MAX1733/MAX1734 step-down DC-DC converters deliver over 250mA to outputs as low as 1.25V. These converters use a unique proprietary current-limited control scheme that achieves over 90% efficiency. These devices maintain extremely low quiescent supply current (40µA), and their high 1.2MHz (max) operating frequency permits small, low-cost external components. This combination of features makes the MAX1733/ MAX1734 excellent high-efficiency alternatives to linear regulators in space-constrained applications.
Internal synchronous rectification greatly improves efficiency and eliminates the external Schottky diode required in conventional step-down converters. Both devices also include internal digital soft-start to limit input current upon startup and reduce input capacitor requirements.
The MAX1733 provides an adjustable output voltage (1.25V to 2.0V). The MAX1734 provides factory-preset output voltages (see Selector Guide). Both are available in space-saving 5-pin SOT23 packages.
Applications
- Cell Phones
- Computers: Desktop, Workstation, Server
- Consumer Audio
- Digital Still Cameras
- Global Positioning Systems (GPS)
- Palmtop Computers
- POS Terminals
- Wireless Data
- Wireless Local Area Networks (WLANs)
Documentation
Data Sheet 1
Design Note 2
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 |
|---|---|---|---|
| MAX1733EUK+ | SOT_23 | ||
| MAX1733EUK+T | SOT_23 |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 11, 2021 - 1703RN ASSEMBLY |
||
| MAX1733EUK+ | PRODUCTION | |
|
Feb 4, 2015 - 1341_CANCELLATION ASSEMBLY |
||
| MAX1733EUK+ | PRODUCTION | |
| MAX1733EUK+T | PRODUCTION | |
|
Apr 20, 2026 - 2571C PIN/ERRATA |
||
| MAX1733EUK+T | PRODUCTION | |
|
Jun 29, 2018 - 1703N ASSEMBLY |
||
| MAX1733EUK+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 |
|---|---|---|
| Switching Regulators & Controllers 1 | ||
| MAX1692 | PRODUCTION | Low-Noise, 5.5V Input, PWM Step-Down Regulator |
Evaluation Kits
Evaluation Kit for the MAX1733, MAX1734