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MAX9550, MAX9551, MAX9552
High-Current VCOM Drive Buffers for TFT LCDs
High Current and Fast Settling Time to Quickly Restore VCOM Voltage for TFT LCDs
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Status
Active: In Production.
Description
The MAX9550/MAX9551/MAX9552 provide a VCOM
source for TFT LCDs. The MAX9550/MAX9551/MAX9552 source and sink a large current to quickly restore the VCOM voltage, making it ideal for TFT LCDs.
The output settles to within 0.1% in less than 2µs. In
addition, the MAX9550/MAX9551/MAX9552 directly drive
the capacitive load in the VCOM layer of the TFT LCDs
without the need for a series resistor.
The MAX9550/MAX9551/MAX9552 feature single, dual,
and quad channel VCOM amplifiers, respectively. The
MAX9550/MAX9551/MAX9552 can drive up to 800mA of
peak current per channel and operate up to 20V. The
devices feature soft-start to reduce inrush current, output
short-circuit protection, and thermal shutdown.
The MAX9550 is available in a space-saving 5-pin thin
SOT23 package, and an 8-pin µMAX® package with an
exposed paddle. The MAX9551 is available in an 8-pin
µMAX package with an exposed paddle. The MAX9552
is available in a 14-pin TSSOP package. All devices are
specified over the -40°C to +85°C temperature range.
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Data Sheet
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An evaluation kit is available: MAX9552EVKIT
Key Features
- Operates Up to 20V
- 800mA Peak Output Current
- Settles to Within 0.1% of VOUT in Less than 2µs
- Excellent Load Regulation
- Thermal-Shutdown Protection
- Short-Circuit Protection to Both Rails
- Soft-Start to Reduce Inrush Current
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Applications/Uses
- Displays: LCD
- Flat-Panel and Plasma TVs
- Instrument Control Voltage Sources
- TFT LCD Panels
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Key Specifications:
| Operational Amplifiers |
| Part Number |
Amps. |
Rail to Rail |
AVCL |
VSUPPLY (Total)
(V) |
VSUPPLY (Total)
(V) |
ICC per Amp.
(µA) |
ICC per Amp.
(µA) |
VOS
(µV) |
CMRR @DC
(dB) |
PSRR @DC
(dB) |
Input IBIAS
(nA) |
Low Pwr. Shutdn |
Package/Pins |
Budgetary Price |
| min |
min |
max |
typ |
max |
max |
typ |
typ |
max |
See Notes |
| MAX9550 |
1 |
Output Only |
1 |
7 |
20 |
2000 |
4000 |
10000 |
96 |
96 |
1000 |
No |
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$0.53 @1k |
| MAX9551 |
2 |
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$0.43 @1k |
| MAX9552 |
4 |
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$0.72 @1k |
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See All Operational Amplifiers (160)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| VCOM Amplifiers and Panel Repair |
| Part Number |
Channels |
Peak Current
(mA) |
Rail to Rail |
Features |
Programmable |
VSUPPLY
(V) |
Oper. Temp.
(°C) |
Package/Pins |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| MAX9550 |
1 |
800 |
Output Only |
Thermal Shutdown |
No |
7 to 20 |
-40 to +85 |
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8.3 |
$0.53 @1k |
| MAX9551 |
2 |
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15.3 |
$0.43 @1k |
| MAX9552 |
4 |
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33.2 |
$0.72 @1k |
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See All VCOM Amplifiers and Panel Repair (7)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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| Video/Wideband Amplifiers |
| Part Number |
Amps. |
Single Supply |
ISUPPLY
(mA) |
IOUT
(mA) |
VSUPPLY
(V) |
VSUPPLY
(V) |
Oper. Temp.
(°C) |
Package/Pins |
Budgetary Price |
| typ |
min |
min |
max |
See Notes |
| MAX9550 |
1 |
Yes |
2 |
55 |
7 |
20 |
-40 to +85 |
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$0.53 @1k |
| MAX9551 |
2 |
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$0.43 @1k |
| MAX9552 |
4 |
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$0.72 @1k |
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See All Video/Wideband Amplifiers (78)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
 Typical Operating Circuit
More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3858
Rev 3;
2007-10-10
This page last modified: 2009-07-16
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