MIC2619 Datasheet, PDF (1/15 Pages) Micrel Semiconductor – 1.2MHz PWM Boost Converter with OVP

MIC2619
1.2MHz PWM Boost Converter
with OVP
General Description
Features
The MIC2619 is a 1.2MHz pulse width modulated (PWM)
step-up switching regulator that is optimized for low power,
high output voltage applications. With a maximum output
voltage of 35V, and a switch current of over 350mA, the
MIC2619 can easily supply most high voltage bias
applications, such as TV tuners.
The MIC2619 implements a constant frequency 1.2MHz
PWM current-mode control scheme. The high frequency
PWM operation saves board space by reducing external
component sizes. The additional benefit of the constant
frequency PWM control scheme as opposed to variable
frequency control schemes is lower output noise and
smaller input ripple injected back to the battery source.
The MIC2619 has programmable overvoltage protection to
ensure output protection in case of fault condition.
The MIC2619 is available in a low profile Thin SOT-23 6-
pin package. The MIC2619 has a junction temperature
range of –40°C to +125°C.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
• 2.8V to 6.5V Input Voltage
• 350mA Switch Current
• Output Voltage up to 35V
• 1.2MHz PWM Operation
• 1.265V Feedback Voltage
• Programmable Over-Voltage Protection (OVP)
• <1% Line Regulation
• <1µA Shutdown Current
• Over-Temperature Protection
• Under-Voltage Lock Out (UVLO)
• Low Profile Thin SOT-23-6 Package
• –40°C to +125°C Junction Temperature Range
Applications
• Bias Supply Applications:
- Tuner Varactor Bias
- High Voltage Bias Supplies
- Avalanche Photo Diode
- High Voltage Display Bias
• DSL/Broadband applications
• Constant Current Power Supplies
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Typical Application
1.2MHz Boost Converter with OVP in Thin SOT-23-6
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
March 2010
M9999-030410-A