MIC2295A Datasheet, PDF (1/9 Pages) Micrel Semiconductor – High Power Density 1.2A Boost Regulator

MIC2295
High Power Density 1.2A Boost Regulator
General Description
The MIC2295 is a 1.2Mhz, PWM dc/dc boost
switching regulator available in low profile Thin
SOT23 and 2mm x 2mm MLF
package options.
High power density is achieved with the MIC2295’s
internal 34V / 1.2A switch, allowing it to power large
loads in a tiny footprint.
The MIC2295 implements constant frequency
1.2MHz PWM current mode control. The MIC2295
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 MIC2295 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 MIC2295 has an operating junction temperature
range of –40°C to +125°C.
V_IN
V_IN
1-Cell
Li Ion
3V to 4.2V
1-Cell
Li Ion
3V to 4.2V
1µF
C1
2.2µF
1₁0₀µ_µHH
VINMIC2295SW
OVP
EN ^VMINIC229S5WFB
BMLOVP
EN
FB
AGND PGND
PGND
AGND
R2
9.01K
V_OUT
15V
10^V0OmUTA
15V /
200mA
R1
100K
R1
2.2µF
100k
R2
9.01K
2.2µF
2mm x 2mm Boost Regulator
Features
• 2.5V to 10V input voltage range
• Output voltage adjustable to 34V
• 1.2A switch current
• 1.2MHz PWM operation
• Stable with small size ceramic capacitors
• High efficiency
• Low input and output ripple
• <1mA shutdown current
• UVLO
• Output over-voltage protection (MIC2295BML)
• Over temperature shutdown
• Thin SOT23-5 package option
• 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
• Flash LED drivers
• Positive and negative output regulators
• SEPIC converters
• Positive to negative Cuk converters
• 12V supply for DSL applications
• Multi-output dc/dc converters
MLF is a trademark of Amkor Technology.
July 2004
M9999-72104
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