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参数资料
| 型号： | MP1531DQ-LF-Z |
| 厂商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分类： | 稳压器 |
| 英文描述： | 0.65 A SWITCHING REGULATOR, 300 kHz SWITCHING FREQ-MAX, QCC16 |
| 封装： | 3 X 3 MM, ROHS COMPLIANT, MO-220VEED-4, QFN-16 |
| 文件页数： | 10/12页 |
| 文件大小： | 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
7
12/4/2009
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2009 MPS. All Rights Reserved.
OUTPUT
VOLTAGES
VIN
VGL
0V
VIN
0V
IN
VEN-HIGH
0V
1.25V
POWER ON RESET
START 1
START 2
TIME
START 3
CT
EN
VIN
0V
RDY
VMAIN
VGH
Figure 2—Start-Up Timing Diagram
APPLICATION INFORMATION
Setting the Output Voltages
Set the output voltage on each output by
selecting the resistive voltage divider ratio. The
voltage divider drops the output voltage to the
feedback threshold voltage. Use 10k to 50k
for the low-side resistor of the voltage divider.
For the step-up converter, determine the
high-side resistor R1 by the equation:
=
2
R
V
1
R
1
FB
1
FB
MAIN
Where VMAIN is the output voltage of the step-up
converter.
For the positive charge-pump, determine the
high-side resistor R9 by the equation:
=
8
R
V
9
R
3
FB
3
FB
GH
For the negative charge-pump, determine the
high-side resistor R7 by the equation:
=
5
R
V
7
R
REF
GL
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