EV0055 (MP1530)
Triple Output Step-Up
Plus Charge Pump for TFT Bias
EVALUATION BOARD
EV0055 Rev. 1.3 www.MonolithicPower.com 1
8/22/2005 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
DESCRIPTION
The EV0055 evaluation board is designed to
demonstrate the capabilities of MPS’ MP1530
triple output step-up converter which is capable of
powering a TFT panel from a regulated 3.3V or 5V.
The MP1530 includes a 1.4MHz fixed-frequency
step-up converter and a positive and negative
linear regulator. The linear regulators are powered
from a charge-pump driven by the step-up
converter switch node (SW).
A single on/off control enables all 3 outputs. The
outputs are internally sequenced at power on and
power off for ease of use. An internal soft-start
prevents overloading the input source at startup.
Cycle-by-cycle over current protection limits
component overstress.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage V
IN
2.7 – 5.5 V
Output Voltage 1 V
MAIN
+13 V
Output Current 1 I
MAIN
350 mA
Output Voltage 2 V
GH
+27 V
Output Current 2 I
GH
20 mA
Output Voltage 3 V
GL
–8.5 V
Output Current 3 I
GL
20 mA
FEATURES
• 2.7 to 5.5V Operating Input Range
• 2.8A Switch Current Limit
• 3 Outputs In 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
• 1µA Shutdown Mode
• Fixed 1.4MHz Frequency
• Positive Regulator up to 38V
• Negative Regulator down to –20V
• Internal Power-On Sequencing
• Adjustable Soft-Start/Fault Timer
• Thermal Shutdown
• Cycle-by-Cycle Over Current Protection
• Under Voltage Lockout
• Ready Flag
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.
EV0055 EVALUATION BOARD
Dimensions (2.4”X x 2.3”Y x 0.4”Z)
Board Number MPS IC Number
EV0055 MP1530DQ
100
90
80
70
60
50
40
30
EFFICIENCY (%)
1 10 100 1000
LOAD CURRENT (mA)
MP1530_EC01
Efficiency vs
Load Current
(Step-Up Converter Only)
V
IN
=3.3V
V
IN
=5V
