MP1530
Triple Output Step-Up
Plus Linear Regulators for TFT Bias
MP1530 Rev. 1.4 www.MonolithicPower.com 1
5/19/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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.
EVALUATION BOARD REFERENCE
Board Number Dimensions
EV0055 2.4”X x 2.3”Y x 0.4”Z
FEATURES
• 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
APPLICATIONS
• TFT LCD Displays
• Portable DVD Players
• Tablet PCs
• Car Navigation Displays
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
MP1530
SW
CT IN
PGNDGND
REF
FB3
FB1
FB2
GL
IN2
GH
IN3
COMP
EN
RDY
TO
SW
V
GL
V
GH
V
MAIN
V
IN
3.3V/5V
OFF ON
100
90
80
70
60
50
40
30
20
EFFICIENCY (%)
1 10 100 1000
LOAD CURRENT (mA)
Efficiency vs
Load Current
(Step-Up Converter Only)
V
MAIN
= 13V
V
IN
= 3.3V
V
IN
= 5.0V
