MIC2810 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – Digital Power Management IC 2MHz, 600mA DC/DC w/Dual 300mA/300mA Low VIN LDOs

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.
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
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
Typical Application
V_IN
2.7V to 5.5V
4.7µF
MIC2810-xxxYML
VIN
VIN1
VIN2
EN
EN1
LOWQ
EN2
BIAS
PGND
0.1µF
LDO
SW
2.2µH
LDO1
LDO2
POR
CSET
SGND
2.2µF
ceramic
0.01µF
V_OUT
2.2µF
2.2µF
ceramic
Memory/DSP
Baseband
GND
GND
1.2V_OUT Efficiency
90
80
70
V_IN=3V
60
V_IN=3.6V
V_IN=4.2V
50
40
30
20
100 _{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 [phone] • fax + 1 [phone] • http://www.micrel.com
April 2007
1
M9999-041107-B