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EV1531DQ-002A Datasheet, PDF (1/5 Pages) Monolithic Power Systems – Low Power, Triple Output Step-Up Plus Charge Pump for TFT Bias | |||
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Monolithic Power Systems
GENERAL DESCRIPTION
The EV1531DQ-002A Evaluation Board is
designed to demonstrate the capabilities of
MPSâ MP1531 triple output step-up converter
with charge-pumps.
The MP1531 includes a 250KHz fixed-frequency
step-up converter and a positive and negative
linear regulator. The linear regulators are
powered via charge-pumps driven by the step-up
converter switch node.
A single on/off control enables all 3 outputs.
The outputs are internally sequenced at power-
on for ease of use. An internal soft-start
prevents overloading the input source at
startup. Cycle-by-cycle current limit reduces
component stress.
ELECTRICAL SPECIFICATION
Parameter
Symbol Value Units
Input Voltage
Main Output Voltage
VIN 2.7-5.5 V
VMAIN
5
V
Main Output Current
IMAIN
100 mA
(+) Charge Pump Voltage VGH
15
V
(+) Charge Pump Current IGH
(â) Charge Pump Voltage VGL
(â) Charge Pump Current IGL
5 mA
â10 V
5 mA
EV1531DQ-002A
Low Power, Triple Output Step-Up
Plus Charge Pump for TFT Bias
EVALUATION BOARD â INITIAL RELEASE
FEATURES
⢠2.7V to 5.5V Operating Input Range
⢠500mA Switch Current Limit
⢠3 Outputs in Single Package
⢠Step-Up Converter up to 22V
⢠Positive 10mA Linear Regulator
⢠Negative 10mA Linear Regulator
⢠250m⦠Internal Power MOSFET Switch
⢠Up to 95% Efficiency
⢠1µA Shutdown Mode
⢠Fixed 250KHz 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
, âMPSâ, âMonolithic Power Systemsâ, and âThe Future of Analog IC
Technologyâ are Registered Trademarks of Monolithic Power Systems, Inc.
EV1531DQ-002A EVALUATION BOARD
Dimensions (2.34âX x 2.25âY x 0.50âZ)
Board Number
MPS IC Number
EV1531DQ-002A
MP1531
Efficiency vs Load Current
Delivered by Step-Up Converter
100
VIN = 4.2V
90
80
VIN = 3.3V
70
60
50
40
30
VMAIN = 5V
20
0
100 200 300 400 500 600
LOAD CURRENT (mA)
MP1531-EC01
10/04, Rev. 1.1
www.MonolithicPower.com
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