MIC2601/2
1.2A, 1.2MHz/2MHz Wide Input Range
Integrated Switch Boost Regulator
General Description
The MIC2601/2 is a 1.2MHz/2MHz, PWM DC/DC boost
switching regulator available in a 2mm x 2mm MLF
®
package. High power density is achieved with the
MIC2601/2’s internal 40V/1.2A switch, allowing it to power
large loads in a tiny footprint.
The
MIC2601/2
implements
constant
frequency
1.2MHz/2MHz PWM current mode control. The MIC2601/2
offers internal compensation that provides excellent
transient response and output regulation performance. The
high frequency operation saves board space by allowing
small, low-profile external components. The fixed
frequency PWM scheme also reduces spurious switching
noise and ripple to the input power source.
Soft start reduces in rush current and is programmable via
external capacitor.
The MIC2601/2 is available in a 2mm x 2mm 8-pin MLF
®
leadless package. Both devices have an output over-
voltage protection feature.
The MIC2601/2 has 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
•
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Wide input voltage range: 4.5V to 20V
Output voltage adjustable to 40V
1.2A switch current
MIC2601 operates at 1.2MHz
MIC2602 operates at 2MHz
Stable with small size ceramic capacitors
High efficiency
Programmable soft start
<10µA shutdown current
UVLO
Output over-voltage protection
Over temperature shutdown
8-pin 2mm x 2mm MLF
®
package
–40
°
C to +125
°
C junction temperature range
Applications
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Multimedia STB/Antenna
Broadband communications
TFT-LCD bias supplies
Bias supply
Positive output regulators
SEPIC converters
DSL applications
Local boost regulators
___________________________________________________________________________________________________________
Typical Application
10µH
V
OUT
18V, 500mA
MIC2601/2
VIN
V
IN
= 12V
2.2µF
0.1µF
EN
SW
FB
0.1µF
10µF
6.65K
100
90
80
70
60
50
40
30
20
10
0
0 100 200 300 400 500 600 700 800
LOAD CURRENT (mA)
18V
OUT
Efficiency
8V
IN
12V
IN
VDD
SS
AGND PGND
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
September 2009
M9999-090909-A