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MIC26400

Part Number	MIC26400
Manufacturer	Micrel Semiconductor
Description	5A Hyper Speed Control Synchronous DC/DC Buck Regulator
Published	Feb 16, 2011
Detailed Description	MIC26400 5A Hyper Speed ControlTM Synchronous DC/DC Buck Regulator SuperSwitcher IITM General Description The Micrel MI...
Datasheet	MIC26400 PDF File

Overview

MIC26400 5A Hyper Speed ControlTM Synchronous DC/DC Buck Regulator SuperSwitcher IITM General Description The Micrel MIC26400 is a constant-frequency, synchronous buck regulator featuring a unique digitally modified adaptive ON-time control architecture.
The MIC26400 operates over an input supply range of 4.
5V to 26V and provides a regulated output at up to 5A of output current.
The output voltage is adjustable down to 0.
8V with a typical accuracy of ±1%, and the device operates at a switching frequency of 300kHz.
Micrel’s Hyper Speed ControlTM architecture allows for ultrafast transient response while reducing the output capacitance and also makes (High VIN)/(Low VOUT) operation possible.
This digitally modified adaptive tON ripple control architecture combines the advantages of fixed frequency operation and fast transient response in a single device.
The MIC26400 offers a full suite of protection features to ensure protection of the IC during fault conditions.
These include undervoltage lockout to ensure proper operation under power-sag conditions, internal soft-start to reduce inrush current, foldback current limit, “hiccup” mode shortcircuit protection and thermal shutdown.
All support documentation can be found on Micrel’s web site at: www.
micrel.
com.
Features • Hyper Speed ControlTM architecture enables - High delta V operation (VIN = 26V and VOUT = 0.
8V) - Small output capacitance • 4.
5V to 26V input voltage • Adjustable output from 0.
8V to 5.
5V (±1% accuracy) • Any CapacitorTM Stable - Zero ESR to high-ESR output capacitance • 5A output current capability • 300kHz switching frequency • Internal compensation • Up to 95% efficiency • 6ms Internal soft-start • Foldback current limit and “hiccup” mode short-circuit protection • Thermal shutdown • Supports safe start-up into a pre-biased load • –40°C to +125°C junction temperature range • 28-pin 5mm × 6mm MLF® package Applications • Distributed power systems • Communications/networking infrastructure • Set-top...

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MIC26400 5A Hyper Speed Control Synchronous DC/DC Buck Regulator - Micrel Semiconductor

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