MIC2810
Digital Power Management IC
2MHz, 600mA DC/DC w/Dual
300mA/300mA Low V
IN
LDOs
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
February 2008
M9999-022008-C
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
?/DIV>
mode, reducing
the total current draw while in this mode to less than 30礎.
In LOWQ
?/DIV>
mode, the output noise of the DC/DC converter
is 53礦
RMS
, significantly lower than other converters that
use a PFM light load mode that can interfere with sensitive
RF circuitry.
The MIC2810 is a 礐ap 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
?/DIV>
leadless package.
Data sheets and support documentation can be found on
Micrels web site at: www.micrel.com.
Features
" 2MHz DC/DC converter and two LDOs
" Integrated power-on reset (OR function for all outputs)
Adjustable delay time
" LOWQ
?/DIV>
mode
30礎 Total I
Q
when in LOWQ
?/DIV>
mode
" Tiny 16-pin 3mm x 3mm MLF
?/DIV>
package
" Thermal shutdown protection
" Current limit protection
DC/DC Converter
" 2.7V to 5.5V input voltage range
" Output current to 600mA in PWM mode
" LOWQ
?/DIV>
Mode: NO NOISE light load mode
53礦
RMS
Output noise in LOWQ
?/DIV>
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
Typical Application
LDO
VIN
VIN1
SW
LDO1
LDO2
POR
CSET
LOWQ
EN2
BIAS
EN1
MIC2810-xxxYML
Baseband
Memory/DSP
PGND SGND
V
IN
2.7V to 5.5V
4.7礔
2.2礔
ceramic
2.2礔
ceramic
0.01礔
0.1礔
2.2礔
V
OUT
2.2礖
GND
GND
EN
VIN2
10
20
30
40
50
60
70
80
90
0 100 200 300 400 500 600
OUTPUT CURRENT (mA)
1.2V
OUT
Efficiency
V
IN
=3.6V
V
IN
=3V
V
IN
=4.2V
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