EVQ1531-M-00A
Low Power, Triple Output Step-Up
Plus Charge Pump for TFT Bias
EVQ1531-M-00A Rev.1.0 www.MonolithicPower.com 1
5/10/2017 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.
Monolithic Power Systems
GENERAL DESCRIPTION
The EVQ1531-M-00A Evaluation Board is
designed to demonstrate the capabilities of
MPS’ 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 V
IN
2.7-5.0 V
Main Output Voltage V
MAIN
5
V
Main Output Current I
MAIN
100
mA
(+) Charge Pump Voltage V
GH
15
V
(+) Charge Pump Current I
GH
5 mA
(–) Charge Pump Voltage V
GL
–10 V
(–) Charge Pump Current I
GL
5 mA
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
250mΩ 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
ll MPS parts are lead-free, halogen free, and adhere to the RoHS
directive. For MPS green status, please visit MPS website under Quality
ssurance.
“MPS” and “The Future of Analog IC Technology” are Registered
Trademarks of Monolithic Power Systems, Inc.
EVQ1531-M-00A EVALUATION BOARD
Dimensions (2.34”X x 2.25”Y x 0.50”Z)
Board Number MPS IC Number
EVQ1531-M-00A MPQ1531DM
LoadEfficiency
V
MAIN
=5V,V
GH
=15V/5mA,V
GL
=‐10V/5mA
60
68
76
84
92
100
0.00 0.03 0.06 0.09 0.12 0.15
LOAD EFFI CIENCY ( % )
LOAD MAIN OUTPUT ( A )
V
IN
=2.7VV
IN
=3.3V
V
IN
=3.8VV
IN
=4.2V
V
IN
=4.7VV
IN
=4.8V
