Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX8740
Edited by the Electronicstalk Editorial Team on 06 June 2005
Convertor provides efficient display
power
The MAX8740 is a high-performance, step-up DC/DC convertor that provides a regulated supply voltage for active-matrix thin-film transistor liquid-crystal displays.
The MAX8740 is a high-performance, step-up DC/DC convertor that provides a regulated supply voltage for active-matrix thin-film transistor (TFT) liquid-crystal displays (LCDs) The MAX8740 incorporates current-mode, fixed-frequency, pulse-width modulation (PWM) circuitry with a built-in N-channel power MOSFET to achieve high efficiency and fast transient response
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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Users can select 640kHz or 1.2MHz operation using a logic input pin.
The high switching frequency allows use of ultrasmall inductors and low-ESR ceramic capacitors.
The current-mode architecture provides fast transient response to pulse loads.
A compensation pin gives users flexibility in adjusting loop dynamics.
The 30V internal MOSFET can generate output voltages up to 28V from an input voltage between 2.6 and 5.5V.
Soft-start slowly ramps the input current and is programmed with an external capacitor.
The MAX8740 is available in a space-saving 10-pin TDFN package.
Prices start at $ 3.14 (1000-up, FOB USA).
A pre-assembled evaluation kit is available with recommended external components to reduce design time.
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