MIC22405YML EV: 1.8V @ 4A, 2.9 ~ 5.5V in, Buck

Summary

The Micrel MIC22405 is a high-efficiency, 4A, integrated switch, synchronous buck (Step-down) regulator. The MIC22405 achieves more than 95% efficiency and switches at 1 MHz. The ultra-high speed control loop keeps the output voltage within regulation even under extreme transient load swings commonly found in FPGAs and low-voltage ASICs. The output voltage is pre-bias safe and is adjustable down to 0.7 V.

The MIC22405 offers a full range of sequencing and tracking options. The Enable/Delay (EN/DLY) and Power Good (PG) inputs allow versatile turn-on and turn-off sequencing across multiple devices. The Ramp Control™ (RC) input allows start-up voltage tracking, either directly or ratio-metrically.

The MIC22405 is available in a 20-pin 3mm x 4mm MLF® with a junction operating range of -40°C to +125°C.

Specifications

Manufacturer	Microchip Technology
Category	AC/DC and DC/DC Conversion
Sub-Category	DC/DC SMPS - Single Output
Eval Board Part Number	576-4020-ND
Eval Board Supplier	Microchip Technology
Eval Board	Board not Stocked
Topology	Step Down
Outputs and Type	1 Non-Isolated
Voltage Out: Factory Set	1.8 V
Current Out	4 A
Voltage In	2.9 ~ 5.5 V
Efficiency @ Conditions	>90%, 3.3V in, 2.5V @ 0.1 ~ 3.1 A >90%, 3.3V in, 1.8V @ 0.1 ~ 2.2 A >85%, 3.3V in, 1.5V @ 0.1 ~ 3.2 A >85%, 3.3V in, 1.2V @ 0.1 ~ 2.5 A >85%, 3.3V in, 1.0V @ 0.1 ~ 2.1 A >80%, 3.3V in, 0.9V @ 0.1 ~ 2.8 A >80%, 3.3V in, 0.8V @ 0.1 ~ 2.5 A >80%, 3.3V in, 0.7V @ 0.1 ~ 2.2 A
Voltage Out Range	0.7 ~ Vin
Features	Current Limit (Adj. or Fixed) Over Current Protection Power Good Output Pre-Biased Startup Shutdown, Enable, Standby Synchronizable Thermal Protection
Switching Frequency	300 kHz ~ 4 MHz
Standby Current [Typical]	5 µA
Quiescent Current [Typical]	1.3 mA
Component Count + Extras	22 + 16
Internal Switch	Yes
Design Author	Microchip Technology
Application / Target Market	Computers DVD/Blu-ray Players FPGA / DSP / Processors Point of Load (PoL) Portable Devices Servers
Standby Current [Maximum]	10 µA
Quiescent Current [Maximum]	2 mA
Main I.C. Base Part	MIC22405
Date Created By Author	2011-07
Date Added To Library	2022-08