EV0055 (MP1530)

Triple Output Step-Up

Plus Charge Pump for TFT Bias

EVALUATION BOARD

EV0055 Rev. 1.3

www.MonolithicPower.com

1

8/22/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

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

Symbol

Value

Units

Input Voltage

2.7 – 5.5

V

Output Voltage 1

+13

V

Output Current 1

350

mA

Output Voltage 2

+27

V

Output Current 2

20

mA

Output Voltage 3

–8.5

V

Output Current 3

20

mA

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

100

90

80

70

60

50

40

30

1

10

100

1000

LOAD CURRENT (mA)

MP1530_EC01

Efficiency vs

Load Current

(Step-Up Converter Only)