This datasheet introduces the features and characteristics of Micrel MIC4720 3mm x 3mm 2.0MHz 2A integrated switch buck regulator. This regulator has high efficiency, 2.0MHz PWM mode, maximum 2A output current, up to 94% efficiency, 100% maximum duty cycle, adjustable output voltage option down to 1V, ultra-fast transient response, ultra-small external components, stable with a 1µH inductor and a 4.7µF output capacitor, fully integrated 2A MOSFET switch, micropower shutdown, thermal shutdown and current limit protection.
The MIC4720 is a high‑efficiency PWM buck (step‑down) regulator that operates from 2.7 V to 5.5 V input and delivers up to 2 A of output current. It runs at a 2.0 MHz switching frequency, offers efficiencies up to 94 %, and supports a 100 % maximum duty cycle for low‑dropout operation. The device includes an internal p‑channel MOSFET, eliminating the need for an external current‑sense resistor.
The regulator is offered in a 12‑pin 3 mm × 3 mm MLF package and a 10‑pin ePad MSOP package. The datasheet details pin functions, absolute maximum ratings, electrical characteristics, typical performance curves, functional block diagram, and a reference schematic with a bill‑of‑materials. Typical applications include FPGA/DSP/ASIC point‑of‑load, broadband communications, DVD/TV recorders, and set‑top boxes.
| Input Voltage Range | 2.7 V to 5.5 V |
|---|---|
| Maximum Output Current | 2 A |
| Switching Frequency | 2.0 MHz |
| Efficiency | up to 94 % |
| Maximum Duty Cycle | 100 % |
The device operates from 2.7 V to 5.5 V input.
It can provide up to 2 A of output current.
The regulator switches at 2.0 MHz.