MIC4782: 1.8 MHz Dual 2A Integrated Switch

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Functional Diagram

Features

3.0 to 6.0V supply voltage
1.8MHz PWM mode
2A dual output
Greater than 92% efficiency
100% maximum duty cycle
Adjustable output voltage option down to 0.6V
Ultra-fast transient response
Ultra-small external components
Stable with a 1µH inductor and a 4.7µF output capacitor
Fully integrated 2A MOSFET switches
Micro-power shutdown
Thermal shutdown and current limit protection
Available in a 3mm × 3mm 16-pin MLF®
–20°C to +125°C junction temperature range

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MIC4782: 1.8 MHz Dual 2A Integrated Switch

Ordering Information

Standard Part Number	Junction Temp. Range	Package
MIC4782YML	–20°C to +125°C	16-Pin 3mm x 3mm MLF®

MLF® is a GREEN RoHS-compliant package.
Lead finish is NiPdAu.
Mold compound is Halogen Free.

General Description

The Micrel MIC4782 is a high efficiency dual PWM buck (step-down) regulator that provides dual 2A output current. The MIC4782 operates at 1.8MHz. A proprietary internal compensation technique allows a closed loop bandwidth of over 200kHz.

The low on-resistance internal P-Channel MOSFET of the MIC4782 allows efficiencies over 92%, reduces external components count and eliminates the need for an expensive current sense resistor.

The MIC4782 operates from 3.0V to 6.0V input and the output can be adjusted down to 0.6V. The device can operate with a maximum duty cycle of 100% for use in low-dropout conditions.

The MIC4782 is available in the exposed pad 16-pin 3mm x 3mm MLF® with a junction operating range from –20°C to +125°C

Data sheets and support documentation can be found on Micrel’s web site at www.micrel.com.

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