MIC37110 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – High-Performance, Low-Noise, 1A LDOs

MIC37110/MIC37112
MIC37120/MIC37122
High-Performance, Low-Noise,
1A LDOs
General Description
The MIC37110/MIC37112 and MIC37120/MIC37122 are
high-performance, low-noise, low dropout regulators. Each
of these LDOs is capable of sourcing 1A output current,
offers high power supply rejection, and low output noise.
These general purpose LDOs are most suitable for
consumer applications such as multimedia devices, set-top
boxes, Blu-ray players, handheld devices, and gaming
consoles.
The MIC37112 and MIC37122 feature adjustable output
voltages while the MIC37110 and MIC37120 come in fixed
1.8V output voltage options. All devices feature 2% initial
output voltage accuracy, typical dropout of 230mV at 1A,
and low ground current.
This family of low-noise regulators is available in 2mm x
2mm Thin MLF^®, SOIC-8 and SOT-223 packages and they
all have 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
• Input voltage range: 2.375V to 5.5V
• Output voltage adjustable down to 1.0V
(MIC37112/MIC37122)
• Stable with small, 2.2µF ceramic output capacitor
• 230mV typical dropout at 1A
• 1A minimum guaranteed output current
• ±2.0% initial accuracy
• Low ground current
• High PSRR: >60dB, up to 1kHz
• Output auto-discharge circuit (MIC37120/MIC37122)
• Thermal-shutdown and current-limit protection
Applications
• Mobile phones and consumer multimedia devices
• Set-top boxes and Blu-ray players
• Gaming consoles
• Tablets and handheld devices
• GPS receivers
___________________________________________________________________________________________________________
Typical Application
Dropout Voltage
vs. Output Current
400
VIN = 2.5V
VADJ = 0.95 * 1.0V
300
ADJUSTABLE OPTION
TA = 25ºC
200
100
0
0.0
0.2
0.4
0.6
0.8
1.0
OUTPUT CURRENT (A)
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
December 2012
M9999-121312-A