MIC22405 Series

4MHz 4A Synchronous Buck Regulator w/Programmable Freq. & POR

Catalog

4MHz 4A Synchronous Buck Regulator w/Programmable Freq. & POR

Part	Output Configuration	Number of Outputs	Voltage - Output (Max) [Max]	Current - Output	Voltage - Input (Max) [Max]	Synchronous Rectifier	Package / Case	Function	Mounting Type	Operating Temperature [Min]	Operating Temperature [Max]	Topology	Output Type	Voltage - Input (Min) [Min]	Supplier Device Package	Voltage - Output (Min/Fixed)	Frequency - Switching	Regulator Topology	Outputs and Type	Outputs and Type	Voltage - Output	Main Purpose	Board Type	Supplied Contents	Utilized IC / Part
Microchip Technology MIC22405YML-TR	Positive	1	5.5 V	4 A	5.5 V		20-MLF® 20-VFQFN Exposed Pad	Step-Down	Surface Mount	-40 °C	125 ¯C	Buck	Adjustable	2.9 V	20-MLF® (3x4)	0.7 V	1 MHz
Microchip Technology MIC22405YML-EV				4 A													1 MHz	Buck	Non-Isolated	1	1.8 V	DC/DC Step Down	Fully Populated	Board(s)	MIC22405

Catalog

4MHz 4A Synchronous Buck Regulator w/Programmable Freq. & POR

Key Features

• * Input voltage range: 2.9V to 5.5V

• * Output voltage adjustable down to 0.7V

• * Output load current up to 4A

• * Safe start-up into a pre-biased output

• * Full sequencing and tracking capability

• * Power Good output

• * Efficiency > 95% across a broad load range

• * Programmable frequency 300kHz to 4MHz

• * Ultra-fast transient response

• * Easy RC compensation

• * 100% maximum duty cycle

• * Fully-integrated MOSFET switches

• * Thermal shutdown and current-limit protection

• * -40°C to +125°C junction temperature range

Description

The MIC22405 is a high efficiency, 4A integrated switch synchronous buck (step-down) regulator. The MIC22405 is optimized for highest efficiency, achieving more than 95% efficiency while still switching at 1MHz. The ultra-high speed control loop keeps the output voltage within regulation even under the extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and can be adjusted down to 0.7V to address all low-voltage power needs. The MIC22405 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) pin, combined with the Power Good (PG) pin, allows multiple outputs to be sequenced in any way during turn-on and turn-off. The Ramp Control™ (RC) pin allows the device to be connected to another product in the MIC22xxx and/or MIC68xxx family, to keep the output voltages within a certain ∆V on start-up.