MIC2601/2
1.2A, 1.2MHz/2MHz Wide Input Range
Integrated Switch Boost Regulator
General Description
Features
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.
• 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
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.
• Output over-voltage protection
• Over temperature shutdown
• 8-pin 2mm x 2mm MLF® package
• –40°C to +125°C junction temperature range
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.
Applications
The MIC2601/2 has an operating junction temperature
range of –40°C to +125°C.
• Multimedia STB/Antenna
• Broadband communications
• TFT-LCD bias supplies
• Bias supply
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
• Positive output regulators
• SEPIC converters
• DSL applications
• Local boost regulators
___________________________________________________________________________________________________________
Typical Application
10µH
18V
Efficiency
OUT
VOUT
18V, 500mA
100
90
80
70
60
50
40
30
20
10
0
MIC2601/2
12V
8V
IN
IN
6.65K
VIN
SW
VIN = 12V
EN
FB
SS
2.2µF
0.1µF
10µF
VDD
0.1µF
AGND PGND
0
100 200 300 400 500 600 700800
LOAD CURRENT (mA)
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
M9999-090909-A
September 2009