MAX8740

NOT RECOMMENDED FOR NEW DESIGNS

TFT-LCD Step-Up DC-DC Converter

Analog Devices MAX8740 Product Info

10 February 2026 6

Features

90% Efficiency

Adjustable Output from V_IN to 28V

2.6V to 5.5V Input Supply Range

Input Supply Undervoltage Lockout

Pin-Programmable 640kHz/1.2MHz Switching Frequency

Programmable Soft-Start

0.1µA Shutdown Current

Small, 10-Pin Thin DFN Package

Part details & applications

The MAX8740 is a high-performance, step-up DC-DC converter that provides a regulated supply voltage for active-matrix, thin-film transistor (TFT), liquid-crystal displays (LCDs). The MAX8740 incorporates currentmode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in n-channel power MOSFET to achieve high efficiency and fast transient response.

Users can select 640kHz or 1.2MHz operation using a logic input pin (FREQ). The high switching frequencies allow the use of ultra-small inductors and low-ESR ceramic capacitors. The current-mode architecture provides fast transient response to pulsed loads. A compensation pin (COMP) gives users flexibility in adjusting loop dynamics. The 30V internal MOSFET can generate output voltages up to 28V from a 2.6V and 5.5V input voltage range. Soft-start slowly ramps the input current and is programmed with an external capacitor.

The MAX8740 is available in a 10-pin thin DFN package.

Applications

LCD Monitor Panels
Notebook Computer Displays

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