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MAX17503

Maxim
Part Number MAX17503
Manufacturer Maxim
Description Synchronous Step-Down DC-DC Converter
Published Oct 10, 2013
Detailed Description EVALUATION KIT AVAILABLE MAX17503 4.5V-60V, 2.5A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal...
Datasheet PDF File MAX17503 PDF File

MAX17503
MAX17503

Overview
EVALUATION KIT AVAILABLE MAX17503 4.
5V-60V, 2.
5A, High-Efficiency, Synchronous Step-Down DC-DC Converter With Internal Compensation Benefits and Features General Description The MAX17503 high-efficiency, high-voltage, synchro­ nously rectified step-down converter with dual integrated MOSFETs operates over a 4.
5V to 60V input.
It delivers up to 2.
5A and 0.
9V to 90%VIN output voltage.
Built-in compensation across the output voltage range eliminates the need for external components.
The feedback (FB) regulation accuracy over -40NC to +125NC is ±1.
1%.
The device is available in a compact (4mm x 4mm) TQFN lead(Pb)-free package with an exposed pad.
Simulation models are available.
The device features a peak-current-mode control architecture with a MODE feature that can be used to operate the device in pulse-width modulation (PWM), pulse-frequency modulation (PFM), or discontinuousconduction mode (DCM) control schemes.
PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to switching frequency.
PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency.
DCM features constant frequency operation down to lighter loads than PFM mode, by not skipping pulses but only disabling negative inductor current at light loads.
DCM operation offers efficiency performance that lies between PWM and PFM modes.
The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.
A programmable soft-start feature allows users to reduce input inrush current.
The device also incorporates an output enable/undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired inputvoltage level.
An open-drain RESET pin provides a delayed power-good signal to the sys­ tem upon achieving successful regulation of the output voltage.
● Eliminates External Components and Reduces Total Cost • No Schottky-Synchronous Operation for High Effic...


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