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PDF EV1531DQ-002A Data sheet ( Hoja de datos )

Número de pieza EV1531DQ-002A
Descripción Triple Output Step-Up Plus Charge Pump
Fabricantes MPS 
Logotipo MPS Logotipo



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Monolithic Power Systems
GENERAL DESCRIPTION
The EV1531DQ-002A 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
Main Output Voltage
VIN
VMAIN
2.7-5.5
5
V
V
Main Output Current
IMAIN
100 mA
(+) Charge Pump Voltage VGH 15 V
(+) Charge Pump Current
(–) Charge Pump Voltage
(–) Charge Pump Current
IGH
VGL
IGL
5 mA
–10 V
5 mA
EV1531DQ-002A
Low Power, Triple Output Step-Up
Plus Charge Pump for TFT Bias
EVALUATION BOARD – 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
250mInternal 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
, “MPS”, “Monolithic Power Systems”, and “The Future of Analog IC
Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
EV1531DQ-002A EVALUATION BOARD
Dimensions (2.34”X x 2.25”Y x 0.50”Z)
Board Number
EV1531DQ-002A
MPS IC Number
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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EV1531DQ-002A pdf
EV1531DQ-002A LOW PWR, TRI-OUTPUT STEP-UP + CHARGE PUMP FOR TFT BIAS
EVALUATION BOARD – INITIAL RELEASE
TEST RESULTS
Power-Up Sequencing
Load Transient
VIN = 3.3V, VMAIN = 5V, IMAIN = 100mA,
Efficiency vs Load Current
VIN = 3.3V, VMAIN = 5V, 5mA-50mA STEP
VGH = 15V, IGH = 5mA, VGL = -10V, IGL = 5mA,
Delivered by Step-Up Converter VGH = 15V, IGH = 5mA, VGL = -10V, IGL = 5mA CCT=10nF
100 VIN = 4.2V
90
80 VIN = 3.3V
70
VMAIN
50mV/div
VEN
5V/div
60
50
40
30
20
0
VMAIN = 5V
IMAIN
50mA/div
100 200 300 400 500 600
LOAD CURRENT (mA)
MP1531-TPC01
VMAIN
5V/div
VGH
10V/div
VGL
10V/div
MP1531_WF01
10ms/div
MP1531_WF02
QUICK START GUIDE
The three output voltages of this board are set to +5V, +15V, and -10V. The board layout
accommodates most commonly used inductors and output capacitors.
1. Make sure Jumper JP1 is connected between 2 and 3.
2. Attach positive end of loads to VMAIN, VGH,and VGL pins respectively. Attach negative end of
loads to GND pins.
3. Attach input voltage 2.7V VIN 5.5V and input ground to VIN and GND pins respectively.
4. During startup RDY will be left HIGH. Once the turn-on sequence is complete, this pin will be
pulled low if all regulators exceed 80% of their specified voltages. After all regulators are turned
on, a fault in any regulator will cause RDY to go LOW after approximately 15µs. If the fault
persists for more than approximately 6ms (for CCT = 10nF), the entire chip will shut down.
NOTICE: MPS believes the information in this document to be accurate and reliable. However, it is subject to change without
notice. Contact MPS for current specifications. MPS encourages users of its products to ensure that third party Intellectual
Property rights are not infringed upon when integrating MPS products into any application. MPS cannot assume any legal
responsibility for any said applications.
EV1531DQ-002A Rev. 1.1
Monolithic Power Systems, Inc.
10/13/04
983 University Avenue, Building A, Los Gatos, CA 95032 USA
© 2004 MPS, Inc.
Tel: 408-357-6600 Fax: 408-357-6601 www.MonolithicPower.com
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