MAX13253

PRODUCTION

1A Spread-Spectrum Push-Pull Transformer Driver for Isolated Power Supplies

Simplifies Isolated Power Designs

Data Sheet (Rev. 2) Product Selection Table

Part Models: 2
1ku List Price: Starting From $4.22

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Overview

Simple, Flexible Design
- +3.0V to +5.5V Supply Range
- Low R_ON 300mΩ (max) at 4.5V
- Up to 90% Efficiency
- Provides Up to 1A to the Transformer
- Internal or External Clock Source
- Internal Oscillator Frequency: 250kHz or 600kHz
- Optional Spread-Spectrum Oscillation
- -40°C to +125°C Temperature Range
Integrated System Protection
- Fault Detection and Indication
- Overcurrent Limiting
- Undervoltage Lockout
- Thermal Shutdown
Saves Space on Board
- Small 10-Pin TDFN Package (3mm x 3mm)

The MAX13253 is a 1A push-pull transformer driver designed to provide a simple solution for low-EMI isolated power supplies. The MAX13253 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 MAX13253 features an integrated oscillator driving a pair of N-channel power switches. The driver includes pin-selectable spread-spectrum oscillation and a well-controlled slew rate to reduce EMI. The MAX13253 can optionally be driven by an external clock to further manage EMI. Internal circuitry guarantees a fixed 50% duty cycle to prevent DC current flow through the transformer, regardless of which clock source is used.

The MAX13253 operates with up to 1A of continuous current and features integrated protection including fault detection, overcurrent protection, and thermal shutdown.

The MAX13253 includes a low-current shutdown mode to reduce the overall supply current to less than 5µA (max) when the driver is disabled.

The MAX13253 is available in a small, 10-pin, (3mm x 3mm) TDFN package and is specified over the -40°C to +125°C temperature range.

Applications

Isolated Analog Front Ends
Isolated Fieldbus Interfaces
Isolated USB Power
Medical Equipment
Power Meter Data Interfaces

Part Models: 2
1ku List Price: Starting From $4.22

Documentation

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
MAX13253ATB+	10-LFCSP-3X3X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX13253ATB+T	10-LFCSP-3X3X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 2, 2025 - 2505 PIN/ERRATA
		pcn_2505
MAX13253ATB+	PRODUCTION	pcn_2505
Feb 6, 2025 - 2455N ASSEMBLY
		pcn_2455n
MAX13253ATB+	PRODUCTION
MAX13253ATB+T	PRODUCTION
Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX13253ATB+	PRODUCTION
MAX13253ATB+T	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
MOSFET & Gate Drivers 4
MAX13256	PRODUCTION	36V H-Bridge Transformer Driver for Isolated Supplies
MAX845	PRODUCTION	Isolated Transformer Driver for PCMCIA Applications
MAX256	PRODUCTION	3W Primary-Side Transformer H-Bridge Driver for Isolated Supplies
MAX253	PRODUCTION	1W Primary-Side Transformer H-Bridge Driver for Isolated Supplies

Tools & Simulations

IBIS Model 1

MAX13253 IBIS Model

Evaluation Kits

Evaluation Kit for the MAX13253

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Features and Benefits

3.0V to 5.5V Operating Voltage Range
Up to 90% Efficiency
Push-Pull Rectified Output
Configurable Bipolar Outputs or Full-Wave Rectifier
Internal or External Clock Operation
Selectable Spread-Spectrum Option for Controlled EMI
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX13253 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the MAX13253 low-EMI push-pull transformer driver. The EV kit operates from a single 3.0V to 5.5V supply and the on-board 1CT:1.3CT turns-ratio transformer sets the output voltage.

The EV kit provides up to 90% overall efficiency at 5V with up to 4.5W output power using a push-pull isolated DC-DC converter. Undervoltage lockout, current limiting, and thermal shutdown provide for a robust isolated supply. The surface-mount transformer provides galvanic isolation with the output powered from a push-pull rectifier circuit, reducing the output-voltage ripple.

The EV kit circuit is configured as a push-pull rectifier, with an output voltage that follows the input voltage. The EV kit is also configurable for other topologies including bipolar outputs and full-wave rectification.

Applications