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參數(shù)資料
| 型號： | MAX1889EGE |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Triple-Output TFT LCD Power Supply with Fault Protection |
| 中文描述： | 2.8 A SWITCHING REGULATOR, 1250 kHz SWITCHING FREQ-MAX, QCC16 |
| 封裝： | 5 X 5 MM, 0.90 MM HEIGHT, THIN, QFN-16 |
| 文件頁數(shù)： | 10/32頁 |
| 文件大?。?/td> | 796K |
| 代理商： | MAX1889EGE |
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M
Triple-Output TFT LCD Power Supply
with Fault Protection
10
______________________________________________________________________________________
Pin Description
PIN
NAME
FUNCTION
1
SHDN
Active-Low Shutdown Control Input. Pull
SHDN
below the 0.4V logic-low level to turn off all sections
of the device and pull the GATE pin high. Pull
SHDN
above the 1.6V logic-high level to enable the
device. Do not leave
SHDN
floating.
Power Ground. PGND is the source of the N-channel power MOSFET. Connect PGND to the analog
ground (GND) at the device
’
s pins.
Analog Ground. Connect GND to the power ground (PGND) at the device
’
s pins.
Internal Reference Bypass Terminal. Connect a 0.22μF ceramic capacitor from REF to the analog
ground (GND). External load capability is at least 50μA.
Main Step-Up Regulator Feedback Input. FB regulates to 1.25V nominal. Connect FB to the center of
a resistive voltage-divider between the main output (V
MAIN
) and the analog ground (GND) to set the
main step-up regulator output voltage. Place the resistive voltage-divider close to the pin.
2
PGND
3
GND
4
REF
5
FB
6
FBN
Negative Linear-Regulator Feedback Input. FBN regulates to 125mV nominal. Connect FBN to the
center of a resistive voltage-divider between the negative output (V
NEG
) and the REF to set the
negative linear-regulator output voltage. Place the resistive voltage-divider close to the pin.
7
DRVN
Negative Linear-Regulator Base Drive. Open drain of an internal P-channel MOSFET. Connect DRVN
to the base of the external linear-regulator NPN pass transistor (see
Pass Transistor Selection
section).
8
DRVP
Positive Linear-Regulator Base Drive. Open drain of an internal N-channel MOSFET. Connect DRVP
to the base of the external linear-regulator PNP pass transistor (see
Pass Transistor Selection
section).
9
FBP
Positive Linear-Regulator Feedback Input. FBP regulates to 1.25V nominal. Connect FBP to the
center of a resistive voltage-divider between the positive output (V
POS
) and the analog ground (GND)
to set the positive linear-regulator output voltage. Place the resistive voltage-divider close to the pin.
10
FREQ
Frequency Select Input. Pull FREQ above logic-high level (0.7
×
V
IN
) to set the frequency to 1MHz
and pull FREQ below logic-low level (0.3
×
V
IN
) to set the frequency to 500kHz. Do not leave FREQ
floating.
Switching Node. Drain of the internal N-channel power MOSFET for the main step-up regulator.
Internal connection. Connect this pin to ground.
11
12
LX
TGND
13
OCN
Overcurrent Comparator Inverting Input. OCN connects to the center tap of a resistive voltage-
divider connected to the drain of the input protection P-channel MOSFET (see the
Input Overcurrent
Protection
section). If unused, connect OCN to REF.
14
OCP
Overcurrent Comparator Noninverting Input. OCP is connected to the center tap of a resistive
voltage-divider that sets the input overcurrent threshold (see the
Input Overcurrent Protection
section). If unused, connect OCP to GND.
Gate Driver Output to the External P-Channel MOSFET (see the
Input Overcurrent Protection
section).
If unused, leave GATE open.
Supply Input. The supply voltage powers all the control circuitry. The input voltage range is from 2.7V
to 5.5V. Bypass with a 0.1μF ceramic capacitor between IN and GND, as close to the pins as
possible.
15
GATE
16
IN
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1889EGE+ | 制造商:Maxim Integrated Products 功能描述:TRIPLE-OUTPUT TFT LCD POWER SUPPLY WITH FAULT PROTECTION - Rail/Tube |
| MAX1889ETE | 功能描述:LCD 驅(qū)動器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX1889ETE+ | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 Quad-Output TFT LCD Power Supply RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| MAX1889ETE+T | 功能描述:LCD 驅(qū)動器 Quad-Output TFT LCD Power Supply RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
| MAX1889ETE-T | 功能描述:LCD 驅(qū)動器 RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube |
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