MAX17761ATC 데이터 시트보기 (PDF) - Maxim Integrated

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MAX17761ATC

4.5V to 76V, 1A, High-Efficiency, Synchronous Step-Down DC-DC Converter

Maxim Integrated 

MAX17761

4.5V to 76V, 1A, High-Efficiency,

Synchronous Step-Down DC-DC Converter

General Description

The MAX17761, high-efficiency, high-voltage, synchronous

step-down DC-DC converter with integrated MOSFETs

operates over a 4.5V to 76V input. The converter can

deliver up to 1A current. Output voltage is programmable

from 0.8V up to 90% of VIN. The feedback voltage regula-

tion accuracy over -40°C to +125°C is ±1.5%.

The device features a peak-current-mode control architecture

and can be operated in either the pulse-width modulation

(PWM) or pulse-frequency modulation (PFM) control

schemes.

The MAX17761 is available in a 12-pin (3mm x 3mm)

TDFN package. Simulation models are available.

Applications

●● Industrial Control Power Supplies

●● General-Purpose Point-of-Load

●● Distributed Supply Regulation

●● Basestation Power Supplies

●● Wall Transformer Regulation

●● High-Voltage, Single-Board Systems

Ordering Information appears at end of data sheet.

Benefits and Features

●● Reduces External Components and Total Cost

• No Schottky—Synchronous Operation

• Internal Compensation Components

• All-Ceramic Capacitors, Compact Layout

●● Reduces Number of DC-DC Regulators to Stock

• Wide 4.5V to 76V Input

• Output Adjustable from 0.8V up to 90% of VIN

• Delivers up to 1A Over Temperature

• 200kHz to 600kHz Adjustable Frequency with

External Clock Synchronization

• Programmable Current Limit

●● Reduces Power Dissipation

• Peak Efficiency > 90%

• PFM Mode Enables Enhanced Light-Load Efficiency

• Auxiliary Bootstrap LDO for Improved Efficiency

• 5μA Shutdown Current

●● Operates Reliably in Adverse Industrial Environments

• Adjustable Soft-Start and Prebiased Power-Up

• Built-in Output-Voltage Monitoring with RESET

• Programmable EN/UVLO Threshold

• Monotonic Startup into Prebiased Load

• Overtemperature Protection

• High Industrial -40°C to +125°C Ambient Operat-

ing Temperature Range/-40°C to +150°C Junction

Temperature Range

19-8608; Rev 1; 2/18

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