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| 型號： | MP1530DM |
| 廠商： | MONOLITHIC POWER SYSTEMS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Triple Output Step-Up Plus Linear Regulators for TFT Bias |
| 中文描述： | 3.6 A SWITCHING REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | MO-153AB, TSSOP-16 |
| 文件頁數(shù)： | 10/15頁 |
| 文件大?。?/td> | 365K |
| 代理商： | MP1530DM |
MP1530 – TRIPLE OUTPUT STEP-UP PLUS LINEAR REGULATORS FOR TFT BIAS
MP1530 Rev. 1.4
5/19/2006
www.MonolithicPower.com
10
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
APPLICATION INFORMATION
COMPONENT SELECTION
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 R
L
of the voltage
divider.
For the step-up converter, determine the high-
side resistor R
H
by the equation:
=
L
1
FB
R
1
FB
MAIN
V
H
V
V
R
Where V
MAIN
is the output voltage of the step-up
converter.
For the positive charge-pump, determine the
high-side resistor R
H
by the equation:
=
L
3
FB
R
3
FB
GH
H
V
V
V
R
For the negative charge-pump, determine the
high-side resistor R
H
by the equation:
V
=
L
REF
R
GL
H
V
R
Selecting the Inductor
The inductor is required to force the higher
output voltage while being driven by the input
voltage. A larger value inductor results in less
ripple current that results in lower peak inductor
current, reducing stress on the internal
N-Channel
.
switch. However, the larger value
inductor has a larger physical size, higher
series resistance, and/or lower saturation
current.
A 4.7
μ
H inductor is recommended for most
applications. A good rule of thumb is to allow
the
peak-to-peak
ripple
approximately 30-50% of the maximum input
current. Make sure that the peak inductor
current is below 75% of the current limit to
prevent loss of regulation due to the current
limit. Also make sure that the inductor does not
current
to
be
saturate under the worst-case load transient
and startup conditions.
Calculate the required inductance value by the
equation:
I
f
×
V
)
V
-
×
(V
×
V
L
SW
OUT
IN
OUT
IN
=
η
×
)
I
×
=
IN
)
MAX
(
LOAD
I
OUT
V
)
MAX
(
IN
I
V
(
)
MAX
(
IN
%
50
%
30
I
=
Where I
LOAD(MAX)
is the maximum load current,
I
is the peak-to-peak inductor ripple current, and
η
is efficiency.
Selecting the Input Capacitor
An input capacitor is required to supply the AC
ripple current to the inductor, while limiting
noise at the input source. A low ESR capacitor
is required to keep the noise at the IC to a
minimum. Since it absorbs the input switching
current it requires an adequate ripple current
rating. Use a capacitor with RMS current rating
greater than the inductor ripple current (see
Selecting The Inductor
to determine the
inductor ripple current). One 10μF ceramic
capacitor is used in the application circuit of
Figure 3 because of the high source impedance
seen in typical lab setups. Actual applications
usually have much lower source impedance
since the step-up converter typically runs
directly from the output of another regulated
supply. Typically, the input capacitance can be
reduced below the value used in the typical
application circuit.
To insure stable operation place the input
capacitor as close to the IC as possible.
Alternately a smaller high quality 0.1μF ceramic
capacitor may be placed closer to the IC if the
larger capacitor is placed further away.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MP1530DM-LF | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1530DM-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1530DQ | 制造商:MPS 制造商全稱:Monolithic Power Systems 功能描述:Triple Output Step-Up Plus Linear Regulators for TFT Bias |
| MP1530DQ-LF-P | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| MP1530DQ-LF-Z | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 1.4MHz Triple Output Step-Up for TFT Bias RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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