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| MP1530 Datasheet, PDF (1/15 Pages) Monolithic Power Systems – Triple Output Step-Up Plus Linear Regulators for TFT Bias | |||
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The Future of Analog IC Technology
MP1530
Triple Output Step-Up
Plus Linear Regulators for TFT Bias
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
EV0055
Dimensions
2.4âX x 2.3âY x 0.4âZ
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
⢠250m⦠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
âMPSâ and âThe Future of Analog IC Technologyâ are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
VIN
3.3V/5V
OFF ON
TO
SW
VGL
CT RDY
EN
COMP
IN
SW
FB1
IN2
MP1530
IN3
GL
FB2
GH
FB3
REF
GND
PGND
VMAIN
VGH
Efficiency vs
Load Current
(Step-Up Converter Only)
100
VIN = 5.0V
90
80
VIN = 3.3V
70
60
50
40
30
VMAIN = 13V
20
1
10
100
1000
LOAD CURRENT (mA)
MP1530 Rev. 1.4
www.MonolithicPower.com
1
5/19/2006
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2006 MPS. All Rights Reserved.
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