MP1531 Ver la hoja de datos (PDF) - Monolithic Power Systems

Número de pieza

componentes Descripción

Lista de partido

MP1531

Low Power, Triple Output Step-Up Plus Charge Pump for TFT Bias

Monolithic Power Systems 

MP1531 – LOW POWER, TRIPLE OUTPUT STEP-UP PLUS CHARGE PUMP FOR TFT BIAS

ELECTRICAL CHARACTERISTICS (4) (continued)

VIN = 5.0V, TA = +25°C, unless otherwise noted.

Parameter

Oscillator

Switching Frequency

Maximum Duty Cycle

Soft-Start Period

Turn-Off Delay

Error Amplifier

Error Amplifier Voltage Gain

Error Amplifier Transconductance

COMP Maximum Output Current

FB1, FB3 Regulation Voltage

FB2 Regulation Voltage

FB1, FB3 Input Bias Current

FB2 Input Bias Current

Reference (REF)

REF Regulation Voltage

REF Load Regulation

Output Switch (SW)

SW On Resistance

SW Current Limit

SW Leakage Current

GL Dropout Voltage (5)

GH Dropout Voltage (5)

GL Leakage Current

GH Leakage Current

Thermal Shutdown

Symbol Condition

fSW

DM

C4 = 10nF

AvEA

GmEA

VFB1 = VFB3 = 1.25V

VFB2 = 0V

IREF = 50µA

0µA < IREF < 200µA

VIN = 5V

VIN = 3V

ILIM

VSW = 22V

VGL = –10V, IGL = 10mA

VGH = 20V, IGH = 10mA

VIN2 = –15V, VGL = GND

VIN3 = 25V, VGH = GND

Min Typ Max

200 250

300

85

90

6

3

400

1000

±100

1.22 1.25 1.28

–25

0

+25

±100

±100

1.22 1.25 1.28

1

1.2

250

400

0.5 0.65

0.5

1

0.15

0.5

1

1

160

Notes:

4) Typical values are guaranteed by design, not production tested.

5) Dropout voltage is the input to output differential at which the circuit ceases to regulate against further reduction in input voltage.

Units

KHz

%

ms

µs

V/V

µA/V

µA

V

mV

nA

nA

V

%

mΩ

mΩ

A

µA

V

V

µA

µA

°C

TYPICAL PERFORMANCE CHARACTERISTICS

Circuit of Figure 3, unless otherwise noted.

Load Transient

VIN = 3.3V, VMAIN = 5V,

Efficiency vs Load Current

5mA-50mA Step, VGH = 15V,

Delivered by Step-Up Converter IGH = 5mA, VGL = -10V, IGL = 5mA

100

VIN = 4.2V

90

80

VIN = 3.3V

70

VMAIN

50mV/div

60

50

40

IMAIN

50mA/div

30

VMAIN = 5V

20

0 100 200 300 400 500 600

LOAD CURRENT (mA)

Power-Up Sequencing

VIN = 3.3V, VMAIN = 5V, IMAIN = 100mA,

VGH = 15V, IGH = 5mA, VGL = -10V,

IGL = 5mA

VEN

5V/div

VMAIN

5V/div

VGH

10V/div

VGL

10V/div

10ms/div

MP1531 Rev. 1.2

www.MonolithicPower.com

3

5/22/2006

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2006 MPS. All Rights Reserved.

Share Link: