MIC2810
Digital Power Management IC
2MHz, 600mA DC/DC w/Dual
300mA/300mA Low V
IN
LDOs
General Description
The MIC2810 is a high performance power management
IC, integrating a 2MHz DC/DC switcher with two 300mA
LDOs. The MIC2810 features a
LOWQ
®
mode, reducing
the total current draw while in this mode to less than 30µA.
In
LOWQ
®
mode, the output noise of the DC/DC converter
is 53µV
RMS
, significantly lower than other converters that
use a PFM light load mode that can interfere with sensitive
RF circuitry.
The MIC2810 is a µCap design, operating with very small
ceramic output capacitors and inductors for stability,
therefore, reducing required board space and component
cost. It is available with fixed output voltages in a 16-pin
3mm x 3mm MLF
®
leadless package.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
DC/DC Converter
•
2.7V to 5.5V input voltage range
•
Output current to 600mA in PWM mode
•
LOWQ
®
Mode: NO NOISE light load mode
– 53µV
RMS
Output noise in
LOWQ
®
mode
•
2MHz PWM operation in normal mode
LDOs
•
LDO1
– 1.65V to 5.5V input voltage range
– 300mA Output current
– Output voltage down to 0.8V
•
LDO2
– 2.7V to 5.5V input voltage range
– 300mA Output current
– Output voltage down to 0.8V
Applications
•
•
•
•
•
Mobile phones
PDAs
GPS receivers
Digital still cameras
Portable media players
Features
•
2MHz DC/DC converter and two LDOs
•
Integrated power-on reset (OR function for all outputs)
– Adjustable delay time
•
LOWQ
®
mode
– 30µA Total I
Q
when in
LOWQ
®
mode
•
Tiny 16-pin 3mm x 3mm MLF
®
package
•
Thermal shutdown protection
•
Current limit protection
Typical Application
1.2V
OUT
Efficiency
MIC2810-xxxYML
V
IN
2.7V to 5.5V
4.7µF
90
V
OUT
2.2µH
2.2µF
VIN
VIN1
VIN2
EN
EN1
LOWQ
EN2
BIAS
PGND
0.1µF
LDO
SW
80
Memory/DSP
70
60
V
IN
=3V
V
IN
=3.6V
V
IN
=4.2V
LDO1
LDO2
POR
CSET
SGND
0.01µF
50
Baseband
2.2µF
ceramic
2.2µF
ceramic
40
30
20
GND
GND
10
0
100 200 300 400 500 600
OUTPUT CURRENT (mA)
LOWQ
is a registered 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 2007
1
M9999-041107-B
MICREL [ MICREL SEMICONDUCTOR ]
