MIC26901YJL EV: 0.9 ~ 5V @ 9A, 4.5 ~ 28V in

Summary

The MIC26901 DC-DC regulator operates over an input supply range of 4.5 V to 28 V, and provides a regulated output at up to 9 A of output current. The output voltage is adjustable to 0.8 V with a typical accuracy of ±1% and the device operates at a switching frequency of 600 kHz. The switching frequency remains fairly constant with changes in input voltage and output load.

Micrel’s Hyper Speed Control™ architecture allows for ultra-fast transient response, while reducing the output capacitance. It also makes (High VIN)/(Low VOUT) operation possible. The MIC26901 utilizes an adaptive TON ripple control architecture. An undervoltage lockout feature is provided to ensure proper operation under power-sag conditions.

An internal soft-start feature is provided to reduce the inrush current. Foldback current limit and “hiccup” mode short-circuit protection and thermal shutdown ensures protection of the IC during fault conditions.

This evaluation board is for 9 A applications.

Specifications

Manufacturer	Microchip Technology
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	576-4017-ND
Eval Board Supplier	Microchip Technology
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	0.9 V 1 V 1.2 V 1.5 V 1.8 V 2.5 V 3.3 V 5 V
Current Out	9 A
Voltage In	4.5 ~ 28 V
Efficiency @ Conditions	>91%, 5V in, 3.3V @ 0.1 ~ 9 A >91%, 24V in, 5V @ 1 ~ 9 A >90%, 12V in, 5V @ 1 ~ 7.6 A >87%, 12V in, 1.8V @ 0.5 ~ 9 A >85%, 5V in, 1.5V @ 0.1 ~ 9 A >85%, 5V in, 1.2V @ 0.1 ~ 7.6 A >85%, 24V in, 1.8V @ 1.8 ~ 8.5 A >85%, 12V in, 1.2V @ 0.5 ~ 8 A >80%, 24V in, 1.2V @ 0.9 ~ 9 A
Voltage Out Range	0.9 ~ 5 V
Features	Current Limit (Adj. or Fixed) Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection
Switching Frequency	600 kHz
Standby Current [Typical]	5 µA
Quiescent Current [Typical]	730 µA
Component Count + Extras	33 + 6
Internal Switch	Yes
Design Author	Microchip Technology
Application / Target Market	Computers Memory Back-up Power: Auxiliary Power Supply Printer, Plotter Servers Set-Top Boxes Telecom
Standby Current [Maximum]	10 µA
Quiescent Current [Maximum]	1.5 mA
Main I.C. Base Part	MIC26901YJL
Date Created By Author	2011-07
Date Added To Library	2013-05