MAX258ATA+T by Analog Devices

500mA Push-Pull Transformer Driver for Isolated Power Supplies


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.

Where to Buy

Prices starting from US$4.21

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Features

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
+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
Undervoltage Lockout
Thermal Shutdown
Saves Space on Board Small 8-Pin TDFN Package (2mm x 3mm)
Small 8-Pin TDFN Package (2mm x 3mm)

Specifications

VIN (V) (min) 3
VIN (V) (max) 5.5
Driver Output Resistance (Ω) (max) 0.3
Max. IOUT (A) 0.5
Topology Push-Pull
IQ (mA) (max) 3.5
Package/Pins TDFN-CU/8
Oper. Temp. (°C) -40 to +125
BudgetaryPrice (See Notes) 3.48


MAX258ATA+T Special Function by Analog Devices

TRANSFORMER DRIVER TDFN-8

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

IC Function Transformer Driver
Supply Voltage Min 3V
Supply Voltage Max 5.5V
IC Package Type TDFN
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

500mA Push-Pull Transformer Dr | Analog Devices
TRANSFORMER DRIVER, TDFN-8 | Farnell

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX258ATA+T ?

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Is the MAX258ATA+T RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX258ATA+T have stock available?

Authorised distributors including Analog Devices and Farnell have stock available or on a lead time for MAX258ATA+T .

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