MAX9550 Datasheet, PDF (1/12 Pages) Maxim Integrated Products – High-Current VCOM Drive Buffers for TFT LCDs

19-3858; Rev 1; 2/06
High-Current VCOM Drive Buffers
for TFT LCDs
General 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.
Applications
TFT-LCD Panels
Instrument Control Voltage Sources
Pin Configuration appears at end of data sheet.
Features
♦ Operates Up To 20V
♦ 800mA Peak Output Current
♦ Settles to Within 0.1% of V_OUT in Less than 2µs
♦ Excellent Load Regulation
♦ Thermal-Shutdown Protection
♦ Short-Circuit Protection to Both Rails
♦ Soft-Start to Reduce Inrush Current
Ordering Information
PART
AMPS PIN-PACKAGE ^{PKG TOP}
CODE MARK
MAX9550EZK+T 1 5 Thin SOT23-5 Z5-1 ADSG
MAX9550EUA+* 1 8 µMAX-EP**
U8E-2 AABA
MAX9551EUA+* 2 8 µMAX-EP**
U8E-2 —
MAX9552EUD+* 4 14 TSSOP-EP** U14E-3 —
Note: All devices specified over the -40°C to +85°C operating
temperature range.
+Denotes lead-free package.
*Future product—contact factory for availability.
**EP = Exposed paddle.
Typical Operating Circuit
16V
SUPPLY
V_DD
MAX9550
V_REF
IN+
OUT VOUT
IN-
GND
TFT LCD
TFT-LCD
CAPACITANCE
µMAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.