MAX258
MAX258
PRODUCTION500mA Push-Pull Transformer Driver for Isolated Power Supplies
Simplifies Isolated Power Designs
- Part Models
- 2
- 1ku List Price
- Starting From $4.71
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Overview
- Simple, Flexible Design
- +3.0V to +5.5V Supply Range
- Low RON 300mΩ (max) at 4.5V
- Up to 90% Efficiency
- Provides Up to 500mA to the Transformer
- 250kHz or 600kHz Internal Oscillator Frequency
- -40°C to +125°C Temperature Range
- Integrated System Protection
- Undervoltage Lockout
- Thermal Shutdown
- Saves Space on Board
- Small 8-Pin TDFN Package (2mm x 3mm)
The MAX258 is a 500mA, push-pull transformer driver designed to provide a simple solution for isolated power supplies. The IC has an internal oscillator and operates from a single +3.0V to +5.5V supply. The transformer’s secondary-to-primary winding ratio defines the output voltage, allowing selection of virtually any isolated output voltage with galvanic isolation.
The device features an integrated oscillator driving a pair of n-channel power switches. Internal circuitry guarantees a fixed 50% duty cycle to prevent DC current flow through the transformer.
The IC operates with up to 500mA of continuous current and features undervoltage lockout and thermal shutdown.
The IC includes a low-current shutdown mode to reduce the overall supply current to less than 5µA (max) when the driver is disabled.
The MAX258 is available in a small 8-pin (2mm x 3mm) TDFN package and is specified over the -40°C to +125°C temperature range.
Applications
- Isolated Analog Front-End
- Isolated Fieldbus Interface
- Medical Equipment
- Power Meter Data Interface
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 |
|---|---|---|---|
| MAX258ATA+ | LFCSP | ||
| MAX258ATA+T | LFCSP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571D PIN/ERRATA |
||
| MAX258ATA+ | PRODUCTION | |
| MAX258ATA+T | PRODUCTION | |
|
Oct 23, 2013 - 1345_AMENDED ASSEMBLY |
||
| MAX258ATA+ | PRODUCTION | |
| MAX258ATA+T | PRODUCTION | |
|
Oct 11, 2013 - 1345 ASSEMBLY |
||
| MAX258ATA+ | PRODUCTION | |
| MAX258ATA+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareHardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| MOSFET & Gate Drivers 5 | ||
| MAX845 | PRODUCTION | Isolated Transformer Driver for PCMCIA Applications |
| MAX13256 | PRODUCTION | 36V H-Bridge Transformer Driver for Isolated Supplies |
| MAX256 | PRODUCTION | 3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies |
| MAX253 | PRODUCTION | 1W Primary-Side Transformer H-Bridge Driver for Isolated Supplies |
| MAX13253 | PRODUCTION | 1A Spread-Spectrum Push-Pull Transformer Driver for Isolated Power Supplies |
Tools & Simulations
IBIS Model 1
Evaluation Kits
Evaluation Kit for the MAX258