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EV0055

Triple Output Step-Up Plus Charge Pump for TFT Bias

Monolithic Power Systems 

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

VIN

VMAIN

IMAIN

VGH

IGH

VGL

IGL

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

VIN=5V

90

80

VIN=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

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

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