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Micrel Semiconductor
Micrel Semiconductor

MIC2290YML Datasheet Preview

MIC2290YML Datasheet

2mm 2mm PWM Boost Regulator with Internal Schotty Diode

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MIC2290YML pdf
MIC2290
Micrel
MIC2290
2mm × 2mm PWM Boost Regulator with
Internal Schotty Diode
General Description
The MIC2290 is a 1.2MHz , PWM, boost-switching regulator
housed in the small size 2mm × 2mm MLF™-8 package. The
MIC2290 features an internal Schottky diode that reduces
circuit board area and total solution cost. High power density
is achieved with the MIC2290’s internal 34V/0.5A switch,
allowing it to power large loads in a tiny footprint.
The MIC2290 implements a constant frequency 1.2MHz
PWM control scheme. The high frequency operation saves
board space by reducing external component sizes. The
fixed frequency PWM topology also reduces switching noise
and ripple to the input power source.
The MIC2290’s wide 2.5V to 10V input voltage allows direct
operation from 3- to 4-cell NiCad/NiMH/Alkaline batteries, 1-
and 2-cell Li Ion batteries, as well as fixed 3.3V and 5V
systems.
The MIC2290 is available in a low-profile 2mm × 2mm
8-pin MLF™ leadless package and operates from 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.
Features
Internal Schottky diode
2.5V to 10V input voltage
Output voltage adjustable to 34V
Over 500mA switch current
1.2MHz PWM operation
Stable with ceramic capacitors
<1% line and load regulation
Low input and output ripple
<1µA shutdown current
UVLO
Output overvoltage protection
Over temperature protection
2mm × 2mm 8-pin MLFpackage
• –40°C to +125°C junction temperature range
Applications
Organic EL power supply
TFT LCD bias supply
12V DSL power supply
CCD bias supply
SEPIC converters
Typical Application
L1
VIN 10µH
Li Ion
Battery
MIC2290BML
27
VIN SW
31
EN OUT
C1 6
1µF
FB
GND
4, 8
VOUT
12V
R1
C2
10µF
R2
Simple 12V Boost Regulator
12VOUT Efficiency
85
VIN = 4.2V
80
75 VIN = 3.2V
70 VIN = 3.6V
65
600 0.02 0.04 0.06 0.08 0.1
LOAD CURRENT (A)
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
August 2004
1
M9999-081104



Micrel Semiconductor
Micrel Semiconductor

MIC2290YML Datasheet Preview

MIC2290YML Datasheet

2mm 2mm PWM Boost Regulator with Internal Schotty Diode

No Preview Available !

MIC2290YML pdf
MIC2290
Ordering Information
Part Number
MIC2290BML
MIC2290YML
Marking
Code
SRC
SRC
Output
Voltage
Adjustable
Adjustable
Overvoltage
Protection
34V
34V
Micrel
Junction
Temp. Range
40°C to 125°C
40°C to 125°C
Package
2×2 8-pin MLF
2×2 8-pin MLF
Lead Finish
Standard
Lead Free
Pin Configuration
OUT 1
VIN 2
EN 3
AGND 4
8 PGND
7 SW
6 FB
5 NC
8-Pin MLF(ML)
(Top View)
Fused Lead Frame
Pin Description
Pin Number
1
2
3
4
5
6
7
8
EP
Pin Name
OUT
VIN
EN
AGND
NC
FB
SW
PGND
GND
Pin Function
Output pin (Output): Output voltage. Connect to FB resistor divider. This pin
has an internal 34V output overvoltage clamp. See Block Diagramand
Applicationssection for more information.
Supply (Input): 2.5V to 10V input voltage.
Enable (Input): Logic high enables regulator. Logic low shuts down regula-
tor.
Analog ground.
No connect (no internal connection to die).
Feedback (Input): Output voltage sense node. Connect feedback resistor
network to this pin. VOUT = 1.24V 1+ RR21
Switch node (Input): Internal power Bipolar collector.
Power ground.
Ground (Return): Exposed backside pad.
M9999-081104
2 August 2004


Part Number MIC2290YML
Description 2mm 2mm PWM Boost Regulator with Internal Schotty Diode
Maker Micrel Semiconductor
Total Page 12 Pages
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