MP1530
Triple Output Step-Up
Plus Linear Regulators for TFT Bias
The Future of Analog IC Technology
DESCRIPTION
The MP1530 combines a triple output step-up
converter with linear regulators to provide a
complete DC/DC solution. It is designed to
power TFT LCD panels from a regulated 3.3V
or 5V supply.
This
device
integrates
a
1.4MHz
fixed-frequency step-up converter with positive
and negative linear regulators. The step-up
converter switch node drives two charge
pumps, which supply powers to their respective
linear regulators. The positive and negative
linear regulator inputs can withstand up to 38V
and down to -20V, respectively.
A single on/off control enables all 3 outputs.
The outputs are internally sequenced at startup
for ease of use. An internal soft-start prevents
input overload at startup. Cycle-by-cycle current
limiting reduces component stress.
The MP1530 is available in a tiny 3mm x 3mm,
16-pin QFN package or a 16-pin TSSOP
package.
FEATURES
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2.7 to 5.5V Operating Input Range
2.8A Switch Current Limit
3 Outputs In a Single Package
Step-Up Converter up to 22V
Positive 20mA Linear Regulator
Negative 20mA Linear Regulator
250mΩ Internal Power MOSFET Switch
Up to 95% Efficiency
1.4MHz Fixed Frequency
Internal Power-On Sequencing
Adjustable Soft-Start/Fault Timer
Cycle-by-Cycle Over Current Protection
Under Voltage Lockout
Ready Flag
16-Pin, QFN (3mm x 3mm) or TSSOP
Packages
TFT LCD Displays
Portable DVD Players
Tablet PCs
Car Navigation Displays
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APPLICATIONS
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EVALUATION BOARD REFERENCE
Board Number
EV0055
Dimensions
2.4”X x 2.3”Y x 0.4”Z
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V
IN
3.3V/5V
Efficiency vs
Load Current
100
90
(Step-Up Converter Only)
V
IN
= 5.0V
CT
RDY
IN
EFFICIENCY (%)
OFF ON
TO
SW
EN
COMP
SW
FB1
V
MAIN
80
70
60
50
40
30
20
1
V
IN
= 3.3V
IN2
MP1530
V
GL
GL
FB2
IN3
GH
FB3
V
GH
V
MAIN
= 13V
10
100
LOAD CURRENT (mA)
1000
REF
GND
PGND
MP1530 Rev. 1.4
5/19/2006
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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