MIC2296 Datasheet, PDF (1/10 Pages) Micrel Semiconductor – High Power Density 1.2A Boost Regulator

MIC2296
High Power Density 1.2A
Boost Regulator
General Description
The MIC2296 is a 600kHz, PWM dc/dc boost switching
regulator available in a 2mm x 2mm MLF™ package
option. High power density is achieved with the MIC2296’s
internal 34V / 1.2A switch, allowing it to power large loads
in a tiny footprint. The MIC2296 is a version of the
MIC2295 1.2MHz, PWM dc/dc boost switching regulator,
that offers improved efficiency resulting from 600kHz
operation.
The MIC2296 implements constant frequency 600kHz
PWM current mode control. The MIC2296 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 MIC2296 is available in a low-profile Thin SOT23 5-
lead package and a 2mm x2mm 8-lead MLF™ leadless
package. The 2mm x 2mm MLF™ package option has an
output over-voltage protection feature.
The MIC2296 has an operating junction temperature range
of –40°C to +125°C
Features
• 2.5V to 10V input voltage range
• Output voltage adjustable to 34V
• 1.2A switch current
• 600kHz PWM operation
• Stable with small size ceramic capacitors
• High efficiency
• Low input and output ripple
• <1µA shutdown current
• UVLO
• Output over-voltage protection (MIC2296BML)
• Over temperature shutdown
• 2mm x 2mm leadless 8-lead MLF™ package option
• –40^oC to +125^oC junction temperature range
Applications
• Organic EL power supplies
• 3.3V to 5V/500mA conversion
• TFT-LCD bias supplies
• Positive and negative output regulators
• SEPIC converters
• Positive to negative Cuk converters
• 12V supply for DSL applications
• Multi-output dc/dc converters
V_IN
1-Cell
Li Ion
3V to 4.2V
C1
2.2µF
10µH
V_OUT
15V/100mA
MIC2296BML
VIN
SW
OVP
EN
FB
AGND PGND
R1
10k
2.2µF
R2
901
V_IN
1-Cell
Li Ion
C1
2.2µF
L1
10µH
MIC2296 BD5
VIN SW
EN
FB
GND
V_OUT
5V/400mA
1000 pF
R1
10k
10µF
R2
3.3k
MLF and MicroLeadFrame is a trademark of Amkor Technology
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
April 2005
M9999-042005
[phone]