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MIC47050 Datasheet(PDF) 1 Page - Micrel Semiconductor

Part # MIC47050
Description  500mA ULDO??with Low Input and Low Output Voltage
Download  16 Pages
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC47050 Datasheet(HTML) 1 Page - Micrel Semiconductor

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MIC47050
500mA ULDO™ with Low Input
and Low Output Voltage
ULDO is a trademark of Micrel Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 2012
M9999-040312-B
General Description
The MIC47050 is a high-speed, ultra-low dropout, dual-
supply NMOS ULDO™ designed to take advantage of
point-of-load applications that use multiple supply rails to
generate a low-voltage, high-current power supply. The
MIC47050 can source 500mA of output current while only
requiring a 1µF ceramic output capacitor for stability. A
1.5% output voltage accuracy, low dropout voltage (44mV
@ 500mA), and low ground current makes this device
ideally suited for mobile and point-of-load applications.
The MIC47050 has an NMOS output stage offering very
low output impedance. The NMOS output stage makes for
a unique ability to respond very quickly to sudden load
changes such as that required by a microprocessor, DSP
or FPGA. The MIC47050 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 processor.
The MIC47050 is available in fixed and adjustable output
voltages in the tiny 2mm x 2mm MLF
® and Thin MLF®
packages 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
 Voltage range
– Input Voltage: 1.0V to 3.6V
– Bias Voltage: 2.3V to 5.5V
 0.4V to 2.0V output voltage range
 Low dropout voltage of 44mV at 500mA
 ±1.5% initial output voltage accuracy
 High bandwidth – very fast transient response
 Stable with a 1µF ceramic output capacitor
 Logic level enable input
 UVLO on both supply voltages
 Available in thermally-enhanced 2mm x 2mm MLF® and
Thin MLF
® packages
 Junction temperature range of –40C to +125C
Applications
 Point-of-load applications
 PDAs, notebooks, and desktops
 Datacom and telecom systems
 DSP, PLD and FPGA power supply
 Low-voltage post regulation
_________________________________________________________________________________________________________________________
Typical Application


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