MIC26603YJL EV: 0.8 ~ 5V @ 6A, 4.5 ~ 28V in

Summary

The MIC26603 DC-DC regulator operates over an input supply range of 4.5V to 28V and provides a regulated output at up to 6A of output current. The output voltage is adjustable to 0.8V 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 Light Load™ architecture provides the same high-efficiency and ultra-fast transient response as the Hyper Speed Control™ architecture under medium to heavy loads, but also maintains high efficiency under light load conditions by transitioning to variable frequency, discontinuous mode operation.

The MIC26603 utilizes an adaptive TON ripple current 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 6A applications.

Specifications

Manufacturer	Microchip Technology
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	576-4016-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	6 A
Voltage In	4.5 ~ 28 V
Efficiency @ Conditions	>93%, 12V in, 5V @ 1 ~ 6 A >90%, 24V in, 5V @ 1.7 ~ 6 A >90%, 12V in, 3.3V @ 0.9 ~ 6 A >89%, 5V in, 3.3V @ 0.1 ~ 6 A >85%, 5V in, 1.8V @ 0.1 ~ 5.5 A >85%, 5V in, 1.2V @ 0.1 ~ 4 A >85%, 24V in, 3.3V @ 1.1 ~ 6 A >80%, 12V in, 1.2V @ 0.6 ~ 6 A >76%, 24V in, 1.2V @ 1 ~ 6 A
Voltage Out Range	0.8 ~ 5 V
Features	Current Limit (Adj. or Fixed) Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out
Switching Frequency	600 kHz
Standby Current [Typical]	5 µA
Quiescent Current [Typical]	450 µA
Component Count + Extras	34 + 4
Internal Switch	Yes
Design Author	Microchip Technology
Application / Target Market	Computers Power: Auxiliary Power Supply Printer, Plotter Telecom
Standby Current [Maximum]	10 µA
Quiescent Current [Maximum]	750 µA
Main I.C. Base Part	MIC26603YJL
Date Created By Author	2011-07
Date Added To Library	2013-05