MAX686EEE+ by Analog Devices

DAC-Controlled Boost Inverter LCD Bias Supply with Internal Switch


The MAX686 DAC-controlled boost/inverter IC converts a positive input voltage to a positive or negative LCD bias voltage up to +27.5V or -27.5V. The device features an internal N-channel MOSFET switch, programmable current limiting, and an internal 6-bit digital-to-analog converter (DAC) for digital adjustment of the output voltage. It comes in a small 16-pin QSOP package (same size as an 8-pin SO). The MAX686 uses a current-limited, pulse-frequency-modulation (PFM) control scheme to provide high efficiency over a wide range of load conditions. Its high switching frequency (up to 300kHz) allows the use of small external components. An LCDON output allows the LCD bias voltage to be automatically disabled when the display logic voltage is removed, protecting the display. The MAX686 has a +2.7V to +5.5V input voltage range for the IC, and a +0.8V to +27.5V input voltage range for the inductor. Typical quiescent supply current is 65µA. Shutdown current is 1.5µA. The MAX686 offers high-level integration to save space, reduce power consumption, and increase battery life, making it an excellent choice for battery-powered portable equipment. The MAX629 is similar to the MAX686, except that it does not contain a built-in DAC. Both devices have evaluation kits to facilitate designs.

Where to Buy

Prices starting from US$4.40

Distributor Stock
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RS
from US$6.45
38
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Analog Devices
from US$5.96
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CoreStaff
from US$4.40
39
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Newark Electronics
from US$6.19
23
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element14
from US$6.35
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Farnell
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Features

Internal 500mA, 28V N-Channel Switch (no external FET required)
Adjustable Output Voltage to +27.5V or -27.5V
6-Bit DAC-Controlled Output Voltage
Up to 90% Efficiency
Small 16-Pin QSOP Package (Same size as 8-pin SO)
Power-OK Indicator
65µA Quiescent Current
1.5µA Shutdown Current
Up to 300kHz Switching Frequency

Specifications

VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) -27.5
VOUT1 (V) (max) 27.5
IOUT1 (A) (max) 0.1
Switch Type Internal
Output Adjust. Method DigitalResistor
# DC-DC Outputs 1
Alternate Topology Step-Up
Switching Frequency (kHz) 300
Package/Pins QSOP/16
BudgetaryPrice (See Notes) 4.15


MAX686EEE+ Data & Signal Conversion by Analog Devices

DAC BOOST/INVERTER QSOP16 686

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

Specifications

Resolution (Bits) 6bit
Sampling Rate -
Input Channel Type -
Supply Voltage Range 2.7V to 5.5V
ADC / DAC Case Style QSOP
No. of Pins 16Pins
Data Interface -
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)
Base Number 686
IC Temperature Range Industrial
Linearity Error ADC / DAC + 1LSB
Linearity Error ADC / DAC - 1LSB
No. of Bits 6bit
No. of Channels 1Channels
Operating Temperature Range -40°C to +85°C
Output Type Voltage
Supply Current 65µA
Supply Voltage Max 5.5V
Supply Voltage Min 2.7V
Termination Type Surface Mount Device

Alternative Descriptions

DAC-Controlled Boost Inverter | Analog Devices
DAC CONTROLLED BOOST INVERTER LCD SUPPLY | RS
Dac, Boost/Inverter, Qsop16, 686 | Newark Electronics
DAC, BOOST/INVERTER, QSOP16, 686 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a MAX686EEE+ ?

Additional datasheets, footprints and schematics for MAX686EEE+ are listed on our Part Details page. You can also find images and similar parts to MAX686EEE+ on this page.

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Is the MAX686EEE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for MAX686EEE+ have stock available?

Authorised distributors including Analog Devices, CoreStaff, RS, Newark Electronics and element14 have stock available or on a lead time for MAX686EEE+ .

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