MAX1886EZK+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX1886EZK+T ,High-Current VCOM Drive BufferApplications Ordering InformationNotebook LCD Panels TOPPART TEMP. RANGE PI N-P ACKAGEM ARKMonitor ..
MAX1887 ,Quick-PWM Slave Controllers for Multiphase, Step-Down Suppliesfeatures.200kHz/300kHz/550kHz (MAX1897) SwitchingSynchronized to the master’s low-side gate driver, ..
MAX1887EEE ,4.0-28 V, quick-PWM slave controller for multiphase, step-down supplieMAX1887/MAX189719-2188; Rev 1; 9/02Quick-PWM Slave Controllers for Multiphase, Step-Down Supplies
MAX1889ETE ,Triple-Output TFT LCD Power Supply with Fault ProtectionFeaturesThe MAX1889 provides the three regulated output volt- High-Performance Step-Up Regulatora ..
MAX1889ETE+ ,Triple-Output TFT LCD Power Supply with Fault ProtectionApplicationsNotebook Computer DisplaysTOP VIEWLCD Monitors 16 15 14 13Car Navigation DisplaysSHDN 1 ..
MAX1889ETE+T ,Triple-Output TFT LCD Power Supply with Fault ProtectionFeaturesThe MAX1889 provides the three regulated output volt- ♦ High-Performance Step-Up Regulatora ..
MAX4837ETT25BD3+ ,500mA LDO Linear Regulators with Current-Limiting SwitchApplicationsMAX4836ETTxy_-T -40°C to +85°C 6 TDFN-6SDIO Ports and Devices Notebook ComputersMAX4837 ..
MAX4838EXT+T ,Overvoltage Protection Controllers with Status FLAGELECTRICAL CHARACTERISTICS(V = +5V (MAX4838–MAX4841), V = +4V (MAX4842), T = -40°C to +85°C, unless ..
MAX4838EXT-T ,Overvoltage Protection Controllers with Status FLAGApplicationsTypical Operating CircuitCell PhonesDigital Still CamerasPDAs and Palmtop DevicesINPUTO ..
MAX483CPA ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversFeaturesThe MAX481, MAX483, MAX485, MAX487–MAX491, and' In µMAX Package: Smallest 8-Pin SOMAX1487 a ..
MAX483CPA+ ,Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversELECTRICAL CHARACTERISTICS(V = 5V ±5%, T = T to T , unless otherwise noted.) (Notes 1, 2)CC A MIN M ..
MAX483CSA ,Low-Power / Slew-Rate-Limited RS-485/RS-422 TransceiversApplicationsMAX481C/D 0°C to +70°C Dice*Industrial-Control Local Area NetworksOrdering Information ..

MAX1886EZK+T
High-Current VCOM Drive Buffer
General Description
The MAX1886 is a high-current operational transcon-
ductance amplifier. The MAX1886 is ideal for driving
the backplane of an active matrix, dot inversion thin film
transistor (TFT) liquid crystal display (LCD). The
MAX1886’s high >500mA peak-current drive capability
provides fast response to pulsed load conditions. The
MAX1886 is stable from 0.47µF to an unlimited amount
of output capacitance.
The MAX1886 is available in the low-profile (1.1mm
max) 5-pin Thin SOT23 package and fully specified
over the -40°C to +85°C extended temperature range.
Applications
Notebook LCD Panels
Monitor LCD Panels
FeaturesStable with 0.47µF to Unlimited Amount of Output
CapacitanceOver 500mA Peak Drive CurrentExcellent Settling Characteristics with Capacitive
Load+4.5V to +13V Input Supply0.45mA Quiescent CurrentThermal Fault ProtectionThin SOT23-5 Package (1.1mm max)
MAX1886
High-Current VCOMDrive Buffer
GND
FB+VCCFB-OUT
MAX1886
THIN SOT23-5
TOP VIEW
Pin Configuration
VREF
FB+
FB-
VCC
OUT
GND
MAX1886
Typical Operating Circuit
19-2095; Rev 0; 8/01
*Requires a special solder temperature profile described in the
Absolute Maximum Ratings section.
Ordering InformationPART TEMP. RANGE PIN- PACKAGE TOPM ARK
MAX1886EZK-40°C to +85°C5 Thin SOT23-5*ADQL
MAX1886
High-Current VCOMDrive Buffer
ABSOLUTE MAXIMUM RATINGS
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.
Note 1:The MAX1886 is 100% production tested at TA= +25°C. Specifications over temperature are guaranteed by design.
VCCto GND............................................................-0.3V to +14V
FB-, FB+, OUT to GND...............................-0.3V to (VCC+ 0.3V)
Continuous Power Dissipation (TA= +70°C)
5-Pin Thin SOT23 (derate 7.1mW°C above +70°C).....727mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
ELECTRICAL CHARACTERISTICS
(VCC= 10V, FB- = OUT, VFB+= 5V, COUT= 0.47µF, TA= -40°C to +85°C, unless otherwise noted. Typical values are at TA= +25°C.)
(Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VCC Input Supply RangeVCC4.513V
VCC Supply CurrentICC450900µA
Input Offset VoltageVOSVFB+ = +5V, no load-55mV
Input Bias CurrentIBIAS-100100nA
Input Offset CurrentIOS+1.2V < VCM < +8.8V-100100nA
Common-Mode Input RangeVCM|VOS| < 10mV over CMR1.2VCC -
1.2VV
Power-Supply Rejection RatioPSRR+4.5V < VCC < +13V, VFB+ = +2.25V70
Common-Mode Rejection RatioCMRR+1.2V < VCM < +8.8V70dB
Gain-Bandwidth ProductGBWSmall signal1/6πCLHz
Small signal (±1mV overdrive)0.3TransconductancegmLarge signal (±30mV overdrive)10S
TA = -40°C to +85°C±175±550Output Current DriveIOUT±100mV overdrive,
VOUT = 3V or 7VTA = 0°C to +85°C±250mA
Thermal Shutdown170°C
Thermal Shutdown Hysteresis15°C
SUPPLY
VOLTAGE
REFERENCE
VOLTAGE0.47
0.47CL1
MAX1886
Figure 1. Load Transient Test Circuit
This device is constructed using a unique set of packaging techniques that impose a limit on the thermal profile the device can be exposed to during
board level solder attach and rework. Maxim recommends the use of the solder profiles recommended in the industry-standard specification, JEDEC
020A, paragraph 7.6, Table 3 for IR/VPR and convection reflow processes. Preheating, per this standard, is required. Hand or wave soldering is not
recommended.
MAX1886
High-Current VCOMDrive Buffer
INPUT OFFSET VOLTAGE DEVIATION
vs. SUPPLY VOLTAGE
MAX1886 toc01
VCC (V)
(mV)
VCM = VCC/2
INPUT OFFSET VOLTAGE DEVIATION
vs. TEMPERATURE
MAX1886 toc02
TEMPERATURE (°C)
(mV)
VCC = 10V
VCM = VCC/2
TRANSCONDUCTANCE
vs. OUTPUT CURRENT
MAX1886 toc03
OUTPUT CURRENT (mA)
TRANSCONDUCTANCE (S)
TA = -40°C
TA = +25°C
TA = +85°C
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1886 toc04
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
+85°C+25°C
-40°C
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
MAX1886 toc05
TEMPERATURE (°C)
SUPPLY CURRENT (mA)
SHORT-CIRCUIT WAVEFORMS
MAX1886 toc07
ICC
500mA/div
IOUT
500mA/div
VCC
5V/div
VOUT
5V/div
20ms/div
LOAD TRANSIENT ±10V
MAX1886 toc06
IOUT
500mA/div
10V/div
VOUT
200mV/div
AC-COUPLED
4μs/div
RL = 2.5Ω, CL = 100nF, FIGURE 1ypical Operating Characteristics
(VCC= 10V, COUT= 1µF, VCM= 5V, TA= +25°C, unless otherwise noted.)
MAX1886
Detailed Description
The MAX1886 operational transconductance amplifier
(OTA) provides high-current output that is ideal for dri-
ving capacitive loads such as the backplane of a TFT
LCD panel. The positive feedback input, FB+, allows
common-mode biasing to mid-supply, or other VCOM
voltage.
The MAX1886 unity-gain bandwidth is GBW = gm/COUT
where gmis the amplifier’s transconductance.
Transconductance is the ratio of the output current to
the input voltage. The gain of the amplifier is dependent
upon the load. The MAX1886 requires only a small
0.47µF ceramic output capacitor for stability. The band-
width is inversely proportional to the output capacitor,
so large capacitive loads improve stability; however,
lower bandwidth decreases the buffer’s transient
response time. To improve the transient response
times, the MAX1886’s transconductance increases as
the output current increases (see Typical Operating
Characteristics).
Applications Information
Output Filter Capacitor
The MAX1886 requires a minimum of 0.47µF output
capacitance placed close to OUT. To ensure buffer sta-
bility, the output capacitor ESR must be 50mΩor lower.
Ceramic capacitors are an excellent choice.
Input Bypass Capacitor
The MAX1886 requires a 0.47µF input bypass capacitor
(C2) close to the VCCsupply input (see Figure 2). Place
the MAX1886 close to the preceding voltage regulator
output capacitor so that the MAX1886 shares the same
capacitor (C1). Minimize trace length and use wide
High-Current VCOMDrive Buffer
STARTUP WAVEFORM
WITHOUT SOFT-START
MAX1886 toc08
ICC
500mA/div
VCC
10V/div
VFB+
5V/div
VOUT
5V/div
5μs/div
COUT = 0.47μF
SUPPLY CAPACITOR
CHARGING CURRENT
STARTUP WAVEFORMS
WITH SOFT-START
MAX1886 toc09ICC
500mA/div
VCC
10V/div
VFB+
5V/div
VOUT
5V/div
500μs/div
COUT = 0.47μF
Typical Operating Characteristics (continued)
(VCC= 10V, COUT= 1µF, VCM= 5V, TA= +25°C, unless otherwise noted.)
PINNAMEDESCRIPTIONOUTOutput of Buffer Amplifier. Requires a minimum 0.47µF ceramic filter capacitor to GND. Place the
capacitor close to OUT.GNDGround
3VCCVoltage-Supply Input. Bypass to GND with a 0.47µF capacitor close to the pin. Use the output
capacitor of the preceding voltage regulator as the additional filter capacitor.FB+Noninverting Input to Buffer AmplifierFB-Inverting Input to Buffer Amplifier. Feedback must be taken from the output filter capacitor terminal.
Pin Description
traces between the voltage regulator output and the
MAX1886 VCCinput to reduce PC board parasitics
(inductance, resistance, and capacitance), which can
cause undesired ringing.
Voltage Reference
The reference voltage for the MAX1886 input can be
produced using the output of a linear regulator. The lin-
ear regulator will reject the ripple voltage produced by
the source drivers (see Figure 2). The output of this lin-
ear regulator can also be used for the gamma correc-
tion reference voltage.
Chip Information
TRANSISTOR COUNT: 121
PROCESS: BiCMOS
MAX1886
High-Current VCOMDrive Buffer
Figure 2. Typical TFT LCD Backplane Drive Circuit
PC BOARD PARASITICS
LINEAR
REGULATOR
OPTIONAL REFERENCE
VOLTAGE CIRCUIT
GAMMA CORRECTION
REFERENCE VOLTAGE
TO LCD
BACKPLANE
0.47μF
VIN
0.47μF
SOURCE DRIVER VOLTAGESWITCHING
REGULATOR
MAX1886
MAX1886
High-Current VCOMDrive Buffer
Package Information

Partno	Mfg	Dc	Qty	Available	Descript
MAX1886EZK+T	MAXIM	N/a	27500	avai	High-Current VCOM Drive Buffer