MAX749CSA+ by Analog Devices

Digitally Adjustable LCD Bias Supply

Status: Active
Series: MAX749
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The MAX749 generates negative LCD-bias contrast voltages from 2V to 6V inputs. Full-scale output voltage can be scaled to -100V or greater, and is digitally adjustable in 64 equal steps by an internal digital-to-analog converter (DAC). Only seven small surface-mount components are required to build a complete supply. The output voltage can also be adjusted using a PWM signal or a potentiometer. A unique current-limited control scheme reduces supply current and maximizes efficiency, while a high switching frequency (up to 500kHz) minimizes the size of external components. Quiescent current is only 60µA max and is reduced to under 15µA in shutdown mode. While shut down, the MAX749 retains the voltage set point, simplifying software control. The MAX749 drives either an external P-channel MOSFET or a PNP transistor.

Prices starting from US$3.42


Distributor Starting From Stock
Logo for Schukat Electronic Schukat Electronic US$4.39
160
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Logo for Chip One Stop Chip One Stop US$3.42
60
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Logo for Newark Electronics Newark Electronics US$5.08
13
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Logo for element14 element14 US$5.15
13
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Features

+2.0V to +6.0V Input Voltage Range
Flexible Control of Output Voltage: Digital Control Potentiometer Adjustment PWM Control
Digital Control
Potentiometer Adjustment
PWM Control
Output Voltage Range Set by One Resistor
Low, 60µA Max Quiescent Current
15µA Max Shutdown Mode
Small Size - 8-Pin SO and Plastic DIP Packages

Specifications

VIN (V) (min) 2
VIN (V) (max) 6
VOUT1 (V) (min) -2
VOUT1 (V) (max) -100
IOUT1 (A) (max) 0.1
Switch Type External
Output Adjust. Method Resistor
# DC-DC Outputs 1
Switching Frequency (kHz) 500
Package/Pins PDIP/8SOIC (N)/8
BudgetaryPrice (See Notes) 3.11


MAX749CSA+ Semiconductors - ICs by Analog Devices

LCD BIAS SUPPLY SMD SOIC8 749

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Topology Flyback
Input Voltage Min 2V
Input Voltage Max 6V
No. of Outputs 1Outputs
DC / DC Converter IC Case SOIC
No. of Pins 8Pins
Output Current -
Output Voltage Min -
Output Voltage Max -100V
Switching Frequency 500kHz
Operating Temperature Max 70°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)
Base Number 749
Brief Features Digital Control Potentiometer Adjustment PWM Control
Device Type LCD
Frequency 500kHz
IC Function Notebook/Laptop/Palmtop Personal Digital Assistants Portable Data Collection Terminals
IC Package Type SOIC
IC Temperature Range Commercial
Logic Function Number 749
Operating Temperature Min 0°C
Operating Temperature Range 0°C to +70°C
Output Current Max 0.1A
Output Voltage -100V
Power Supply Type PWM Controller
Primary Input Voltage 6V
Supply Voltage Max 6V
Supply Voltage Min 2V

Alternative Descriptions

LCD Bias Supply Dig Adj SO8 | Schukat Electronic
Dc/Dc Conv, Flyback, 500Khz, 70Deg C | Newark Electronics
LCD BIAS SUPPLY, SMD, SOIC8, 749 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX749CSA+ ?

Additional datasheets, footprints and schematics for MAX749CSA+ are listed on our Part Details page. You can also find images and similar parts to MAX749CSA+ on this page.

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Is the MAX749CSA+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX749CSA+ have stock available?

Authorised distributors including Schukat Electronic, Chip One Stop, Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX749CSA+ .

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