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MAX744A - Current-Mode PWM DC-DC Converters

Description

The MAX730A/MAX738A/MAX744A are 5V-output CMOS, step-down switching regulators.

The MAX738A/ MAX744A accept inputs from 6V to 16V and deliver 750mA.

The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications.

Features

  • o 750mA Load Currents (MAX738A/MAX744A) o High-Frequency, Current-Mode PWM o 159kHz to 212.5kHz Guaranteed Oscillator Frequency Limits (MAX744A) o 85% to 96% Efficiencies o 1.7mA Quiescent Current o 6µA Shutdown Supply Current o Single Preselected Inductor Value, No Component Design Required o Overcurrent, Soft-Start, and Undervoltage Lockout Protection o Cycle-by-Cycle Current Limiting o 8-Pin DIP/SO Packages (MAX730A) _________________Ordering Information PART TEMP. RANGE PIN-.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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19-0165; Rev 2; 1/96 MAX730A/MAX738A/MAX744A 5V, Step-Down, Current-Mode PWM DC-DC Converters __________________General Description The MAX730A/MAX738A/MAX744A are 5V-output CMOS, step-down switching regulators. The MAX738A/ MAX744A accept inputs from 6V to 16V and deliver 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply current is 1.7mA and only 6µA in shutdown. Pulse-width modulation (PWM) current-mode control provides precise output regulation and excellent transient responses.
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