MAX9551 Maxim, MAX9551 Datasheet

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MAX9551

Manufacturer Part Number
MAX9551
Description
The MAX9550/MAX9551/MAX9552 provide a VCOM source for TFT LCDs
Manufacturer
Maxim
Datasheet
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
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.
19-3858; Rev 3; 10/07
Pin Configuration appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
TFT-LCD Panels
Instrument Control Voltage Sources
V
REF
________________________________________________________________ Maxim Integrated Products
General Description
IN+
IN-
SUPPLY
16V
Applications
High-Current VCOM Drive Buffers
MAX9550
®
GND
package with an
V
DD
OUT
♦ Operates Up To 20V
♦ 800mA Peak Output Current
♦ Settles to Within 0.1% of V
♦ Excellent Load Regulation
♦ Thermal-Shutdown Protection
♦ Short-Circuit Protection to Both Rails
♦ Soft-Start to Reduce Inrush Current
Note: All devices specified over the -40°C to +85°C operating
temperature range.
+Denotes lead-free package.
*EP = Exposed paddle.
MAX9550EZK+T
MAX9550EUA+
MAX9551EUA+
MAX9552EUD+
PART
1µF
Typical Operating Circuit
AMPS PIN-PACKAGE
1
1
2
4
Ordering Information
TFT LCD
for TFT LCDs
5 Thin SOT23-5
8 µMAX-EP*
8 µMAX-EP*
14 TSSOP-EP*
TFT-LCD
CAPACITANCE
OUT
in Less than 2µs
U14E-3
CODE
U8E-2
U8E-2
Features
PKG
Z5-1
MARK
ADSG
AABA
TOP
1

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MAX9551 Summary of contents

Page 1

... The MAX9550 is available in a space-saving 5-pin thin SOT23 package, and an 8-pin µMAX 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. ...

Page 2

... Thin SOT23 (derate 2.7mW/°C above +70°C) ...219.1mW Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...

Page 3

ELECTRICAL CHARACTERISTICS (continued 16V, GND = 0V OUT T = +25°C.) (Note 1) A PARAMETER SYMBOL AC CHARACTERISTICS Settling Time Input Capacitance Transconductance Transient Output Current I OUTMAX Note 1: All devices are ...

Page 4

High-Current VCOM Drive Buffers for TFT LCDs (V = 16V, GND = 0V OUT SUPPLY CURRENT vs. SUPPLY VOLTAGE 3 +85° +25°C A 2.0 1 ...

Page 5

... PIN MAX9550 MAX9551 MAX9552 THIN µMAX SOT23 1 6 — — — — — 1 — — 3 — — 2 — — — — 5 — — 6 — — 7 — — — — — — — — — 10 — ...

Page 6

... Connect the feed- back at OUT using a Kelvin connection at the low-ESR capacitor. Thermal Shutdown with Temperature The MAX9550/MAX9551/MAX9552 are capable of high output currents and therefore, feature thermal-shutdown protection with temperature hysteresis. When the die tem- perature reaches +160°C, the devices shut down. When the die cools down by 15° ...

Page 7

... OUT pin to ensure buffer stability (see Figure 2). Ceramic capacitors are an excellent choice. Power Supplies and Bypass Capacitors The MAX9550/MAX9551/MAX9552 operate from 20V single supply, or from ±3V to ±10V dual supplies. Proper supply bypassing ensures stability while driving high transient loads. The MAX9550/MAX9551/MAX9552 require minimum 4.7µ ...

Page 8

... High-Current VCOM Drive Buffers for TFT LCDs TOP VIEW MAX9550 OUT 1 2 GND IN+ 3 THIN SOT23 MAX9551 OUTA 1 INA- 2 INA+ 3 GND 4 µMAX-EP 8 _______________________________________________________________________________________ 5 V N.C. DD IN- IN+ GND 4 IN- OUTA INA- INA OUTB INB+ 6 INB- INB- 5 INB+ OUTB PROCESS: BiCMOS ...

Page 9

... For the latest package outline information go to www.maxim-ic.com/packages.) _______________________________________________________________________________________ High-Current VCOM Drive Buffers for TFT LCDs Package Information 9 ...

Page 10

... High-Current VCOM Drive Buffers for TFT LCDs (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 10 ______________________________________________________________________________________ Package Information (continued) ...

Page 11

... For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ High-Current VCOM Drive Buffers Package Information (continued) for TFT LCDs 1 21-0107 ...

Page 12

... Revision History Pages changed at Rev 10, 12 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. ...

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