MAX749ESA+ by Analog Devices

Digitally Adjustable LCD Bias Supply


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.

Where to Buy

Prices starting from US$1.78

Distributor Stock
Logo for Farnell
Farnell
from US$6.29
No stock
Buy Now
Logo for Newark Electronics
Newark Electronics
from US$1.78
5
in stock
Buy Now
Logo for element14
element14
from US$6.65
-
Buy Now

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


MAX749ESA+ Special Function by Analog Devices

LCD BIAS SUPPLY NSOIC-8

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

Specifications

IC Function LCD Bias Supply
Supply Voltage Min 2V
Supply Voltage Max 6V
IC Package Type NSOIC
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Lcd Bias Supply, Nsoic-8 | Newark Electronics
LCD BIAS SUPPLY, NSOIC-8 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX749ESA+ ?

Additional datasheets, footprints and schematics for MAX749ESA+ are listed on our Part Details page. You can also find images and similar parts to MAX749ESA+ on this page.

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Is the MAX749ESA+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX749ESA+ have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX749ESA+ .

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