MIC47150

1.5A, Low Voltage, Adjustable, High-

Bandwidth LDO Regulator with Dual Input

Supplies

*See Thermal Design Section

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

October 2009

M9999-102309-A

General Description

The MIC47150 is a high-bandwidth, low-dropout, 1.5A volt-

age regulator ideal for powering core voltages of low-

power microprocessors. The MIC47150 implements a dual

supply configuration allowing for very low output

impedance and very fast transient response.

The MIC47150 requires a bias input supply between 3V

and 6.5V for proper operation. The main input supply rail

operates from 1.4V to 6.5V that allows for adjustable

output voltages down to 0.9V.

The MIC47150 requires a minimum of 1µF output

capacitance for stability, and optimal operation is achieved

with small ceramic capacitors.

The MIC47150 is available in a 5-pin power D-Pak

package (TO-252) with an operating temperature range of

–40°C to +125°C.

Datasheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Features

• Input Voltage Range:

–

–

• Stable with 1µF ceramic capacitor

• ±1% initial tolerance

over temperature

• Adjustable output voltage down to 0.9V

• Ultra fast transient response (Up to 10MHz bandwidth)

• Excellent line and load regulation specifications

• Power D-Pak package (TO-252)

• Thermal shutdown and current-limit protection

• Junction temperature range: –40°C to +125°C

Applications

• Graphics processors

• PC add-in cards

• Microprocessor core voltage supply

• Low voltage digital ICs

• High efficiency linear power supplies

• SMPS post regulators

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Typical Application*

Figure 1. Typical Application Circuit