MIC47100: 1A High Speed Low VIN LDO0 pages

MIC47100
1A High Speed Low VIN LDO
MicroLead Frame and MLF are registered trademark of Amkor Technology
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2008 M9999-092908-B
General Description
The MIC47100 is a high speed, Low VIN LDO capable of
delivering up to 1A and designed to take advantage of
point of load applications that use multiple supply rails to
generate a low voltage, high current power supply. The
MIC47100 is stable with only a 1ìF ceramic output
capacitor and is available in a thermally enhanced
2mm × 2mm MLF® package thus making it an optimal
solution for board-constrained applications.
The MIC47100 has an NMOS output stage offering very
low output impedance. The NMOS output stage offers a
unique ability to respond very quickly to sudden load
changes such as that required by a microprocessor, DSP
or FPGA. The MIC47100 consumes little quiescent
current and therefore can be used for driving the core
voltages of mobile processors, post regulating a core
DC/DC converter in any portable device.
The MIC47100 is available in fixed and adjustable output
voltages in the exposed pad MSOP-8 package and the tiny
2mm × 2mm MLF® package with an operating junction
temperature range of -40°C to +125°C.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Operating voltage range:
- Input Supply: 1.0V to 3.6V
- Bias Supply: 2.3V to 5.5V
• 0.8V to 2.0V output voltage range
• High bandwidth – very fast transient response
• PSRR >50dB at 100kHz
• Stable with a 1ìF ceramic output capacitor
• Low dropout voltage of 80mV at 1A
• High output voltage accuracy:
- +/- 1.5% initial accuracy
- +/- 2% over temperature
• Logic level enable input
• UVLO on both supply voltages for easy turn-on
• ePad MSOP-8 – small form factor power package
• Thermally enhanced 2mm × 2mm MLF® – smallest
solution
Applications:
• Point of Load
• PDAs
• DSP, PLD and FPGA Power Supply
• Low Voltage Post Regulation
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Typical Application