MIC2605_09 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – 0.5A, 1.2MHz / 2MHz Wide Input Range Boost Regulator with Integrated Switch and Schottky Diode

MIC2605/6
0.5A, 1.2MHz / 2MHz Wide Input Range
Boost Regulator with Integrated Switch
and Schottky Diode
General Description
Features
The MIC2605/6 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
MIC2605/6’s internal 40V/0.5A switch and schottky diode,
allowing it to power large loads in a tiny footprint.
The MIC2605/6 implements constant frequency
1.2MHz/2MHz PWM current mode control. The MIC2605/6
offers internal compensation that offers 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.
The MIC2605/6 is available in an 8-pin 2mm x 2mm MLF^®
leadless package. This package has an output over-
voltage protection feature.
• Wide input voltage range: 4.5V to 20V
• Output voltage adjustable to 40V
• 0.5A switch current and schottky diode
• MIC2605 operates at 1.2MHz
• MIC2606 operates at 2MHz
• Programmable soft start
• Stable with small size ceramic capacitors
• High efficiency
• Low input and output ripple
• <10µA shutdown current
• UVLO
• Output over-voltage and over-temperature protection
• 8-pin 2mm x 2mm MLF^® package
• –40^°C to +125^°C junction temperature range
The MIC2605/6 has an operating junction temperature
range of –40^°C to +125^°C.
Applications
Data sheets and support documentation can be found on • TV-tuners
Micrel’s web site at www.micrel.com.
• Broadband communications
• TFT-LCD bias supplies
• Bias supply
• Positive output regulators
• SEPIC converters
• DSL applications
• Local boost regulators
___________________________________________________________________________________________________________
Typical Application
10µH
V_IN = 12V
1µF
0.1µF
MIC2605/6
VIN
SW
OUT
EN
FB
VDD
SS PGND
0.1µF
V_OUT
32V, 30mA
12.4K
1µF
499
32V_OUT Efficiency
90
80
70
60
50
40
30
20
10
V_{IN = 12V}
0
20 40 60 80 100 120
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-B