MIC2601 Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 1.2A, 1.2MHz/2MHz Wide Input Range Integrated Switch Boost Regulator

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
• 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
• 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_IN = 12V
2.2µF
0.1µF
MIC2601/2
VIN
SW
EN
FB
VDD
SS
AGND PGND
V_OUT
18V, 500mA
6.65K
0.1µF
10µF
18V_OUT Efficiency
100
90
80
8V_IN
70
12V_IN
60
50
40
30
20
10
00 _{100 200 300 400 500 600 700 800}
LOAD CURRENT (mA)
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
September 2009
M9999-090909-A