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參數(shù)資料
| 型號： | MP1531DQ-LF-Z |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 0.65 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, QCC16 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, MO-220VEED-4, QFN-16 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 287K |
| 代理商： | MP1531DQ-LF-Z |
MP1531
Low Power, Triple Output Step-Up
Plus Charge Pump for TFT Bias
MP1531 Rev. 1.3
www.MonolithicPower.com
1
12/4/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP1531 is a triple output step-up converter
with charge-pumps to make a complete DC/DC
converter to power a TFT LCD panel from a
2.7V to 5.5V supply.
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.
The MP1531 is available in both a tiny 16-pin
QFN package (3mm x 3mm) and a 16-pin
TSSOP package.
EVALUATION BOARD REFERENCE
Board Number
Dimensions
EV1531DQ-002A
2.3”X x 2.3”Y x 0.5”Z
FEATURES
2.7V to 5.5V Operating Input Range
500mA Switch Current Limit
3 Outputs in a Single Package
Step-Up Converter up to 22V
Positive 10mA Linear Regulator
Negative 10mA Linear Regulator
250m Internal Power MOSFET Switch
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
16-Pin TSSOP and QFN (3mm x 3mm) Packages
APPLICATIONS
TFT LCD Displays
Portable DVD Players
Tablet PCs
Car Navigation Displays
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of
Monolithic Power Systems, Inc.
TYPICAL APPLICATION
MP1531
SW
FB1
FB3
IN3
GH
CT
IN
PGND
GND
REF
FB2
GL
EN
COMP
IN2
RDY
OFF ON
TO
SW
VGL
-4V
VIN
2.7V-4.2V
VMAIN
5V
VGH
12V
100
90
80
70
60
50
40
30
20
EFFICIENCY
(%)
0
100 200 300 400 500 600
LOAD CURRENT (mA)
Efficiency vs
Load Current
VIN = 3.3V
VMAIN = 5V
VIN = 4.2V
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