EV0055 Datasheet, PDF (1/5 Pages) Monolithic Power Systems – Triple Output Step-Up Plus Charge Pump for TFT Bias

TM
The Future of Analog IC Technology ^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
Input Voltage
Output Voltage 1
Output Current 1
Output Voltage 2
Output Current 2
Output Voltage 3
Output Current 3
Symbol
V_IN
V_MAIN
I_MAIN
V_GH
I_GH
V_GL
I_GL
Value
2.7 – 5.5
+13
350
+27
20
–8.5
20
Units
V
V
mA
V
mA
V
mA
EV0055 (MP1530)
Triple Output Step-Up
Plus Charge Pump for TFT Bias
EVALUATION BOARD
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
Efficiency vs
Load Current
(Step-Up Converter Only)
100
V_IN=5V
90
80
V_IN=3.3V
70
60
50
40
30
1
10
100
1000
LOAD CURRENT (mA)
MP1530_EC01
EV0055 Rev. 1.3
www.MonolithicPower.com
1
8/22/2005
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© 2005 MPS. All Rights Reserved.