MAX17681ATB+ by Analog Devices

4.5V to 42V Input, High-Efficiency, Iso-Buck DC-DC Converter


The MAX17681/MAX17681A is a high-voltage, high-efficiency, iso-buck DC-DC converter designed to provide isolated power up to 5W. The device operates over a wide 4.5V to 42V input and uses primary-side feedback to regulate the output voltage. MAX17681/MAX17681A uses peak-current-mode control. The low-resistance, on-chip MOSFETs ensure high efficiency at full load while simplifying the PCB layout. The MAX17681/MAX17681A devices generate a well regulated primary side voltage which is then scaled by a suitable transformer turns ratio to derive isolated secondary output rails. While both MAX17681 and MAX17681A support primary side overcurrent protection, the MAX17681A is an enhanced design that supports robust secondary-side overcurrent protection as well. The MAX17681/MAX17681A is available in a compact 10-pin (3mm x 2mm) TDFN package. Simulation models are available. How to Shrink Your Isolated Power Design with the MAX17681 Iso Buck Technology

Where to Buy

Prices starting from US$1.37

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Features

Reduces External Components and Total Cost No OptoCoupler Synchronous Primary Operation All-Ceramic Capacitors, Compact Layout
No OptoCoupler
Synchronous Primary Operation
All-Ceramic Capacitors, Compact Layout
Reduces Number of DC-DC Regulators to Stock Wide 4.5V to 42V Input 0.9V to 0.96 x VIN Primary Output Voltage Delivers Up to 5W Output Power
Wide 4.5V to 42V Input
0.9V to 0.96 x VIN Primary Output Voltage
Delivers Up to 5W Output Power
Reduces Power Dissipation Peak Efficiency > 90% 0.9µA (typ) Shutdown Current
Peak Efficiency > 90%
0.9µA (typ) Shutdown Current
Operates Reliably in Adverse Industrial Environments Peak and Sink Current-Limit Protection ±1.7% Feedback Accuracy Programmable EN/UVLO Threshold Adjustable Soft-Start Overtemperature Protection -40°C to +125°C Operation
Peak and Sink Current-Limit Protection
±1.7% Feedback Accuracy
Programmable EN/UVLO Threshold
Adjustable Soft-Start
Overtemperature Protection
-40°C to +125°C Operation
Short-Circuit Protection MAX17681A Supports Robust Secondary-Side Short-Circuit Protection MAX17681A Is Recommended for All New Designs
MAX17681A Supports Robust Secondary-Side Short-Circuit Protection
MAX17681A Is Recommended for All New Designs

Specifications

VIN (V) (min) 4.5
VIN (V) (max) 42
VOUT1 (V) (min) 0.9
VOUT1 (V) (max) 42
Switch Type Internal
VOUT1 Tolerance (±%) 1.7
Output Adjust. Method Resistor
Synchronous Switching? Yes
Power Good Signal Yes
IQ (mA) (max) 1.95
# DC-DC Outputs 1
Alternate Topology Step-DownStep-Up
Switching Frequency (kHz) 200
Design Tools EE-Sim
Package/Pins TDFN/10
Oper. Temp. (°C) -40 to +125


MAX17681ATB+ Power Management ICs - PMIC by Analog Devices

DC/DC CONV ISO-BUCK 200KHZ TDFN-10

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

Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 4.5V
Input Voltage Max 42V
No. of Outputs 1Outputs
DC / DC Converter IC Case TDFN
No. of Pins 10Pins
Output Current -
Output Voltage Min 900mV
Output Voltage Max 40.32V
Switching Frequency 200kHz
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
Operating Temperature Min -40°C

Alternative Descriptions

1A, 42V,Iso-Buck Regulator | Analog Devices
DC/DC CONV, ISO-BUCK, 200KHZ, TDFN-10 | Farnell

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX17681ATB+ ?

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Is the MAX17681ATB+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX17681ATB+ have stock available?

Authorised distributors including Analog Devices, element14 and Farnell have stock available or on a lead time for MAX17681ATB+ .

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