MAX685EEE+ by Analog Devices

Dual-Output (Positive and Negative), DC-DC Converter for CCD and LCD


The MAX685 DC-DC converter provides low-noise dual outputs for powering CCD imaging devices and LCDs. This device uses a single inductor to provide independently regulated positive and negative outputs. Integrated power switches are included in a small 24-Pin 4mm x 4mm Thin QFN package to save space and reduce cost. A 16-pin QSOP package is also available. Each output delivers up to 10mA from a +2.7V to +5.5V input voltage range. Output voltages are set independently up to 24V and down to -9V. With a few additional low-cost components, the output voltages can be set at up to 45V and down to -16V. Output ripple magnitude is 30mVp-p. The MAX685 uses a fixed-frequency, pulse-width-modulated (PWM) control scheme at 220kHz or 400kHz to permit output noise filtering and to reduce the size of external components. The frequency can also be synchronized to an external clock signal between 200kHz and 480kHz. The MAX685 has a power-OK indicator output (POK) that signals when both outputs are within regulation. A logic-controlled shutdown completely turns off both outputs and reduces supply current to 0.1µA. The user can also set which output turns on first. The preassembled MAX685 evaluation kit is available to reduce design time.

Where to Buy

Prices starting from US$3.71

Distributor Stock
Logo for Farnell
Farnell
from US$6.09
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Analog Devices
from US$6.27
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CoreStaff
from US$3.71
97
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Newark Electronics
from US$6.51
31
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element14
from US$6.68
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Features

Dual Output Using a Single Inductor
Low-Noise Output, 30mVp-p Ripple
Output Voltages up to 24V and down to -9V (up to 45V and down to -16V with added components)
Internal Switches in a Small 24-Pin 4mm x 4mm Thin QFN Package
220kHz/400kHz Fixed-Frequency PWM Operation
Frequency Can Be Synchronized to External Clock
Power-OK Indicator
Selectable Power-On Sequencing
0.1µA Logic-Controlled Shutdown

Specifications

VIN (V) (min) 2.7
VIN (V) (max) 5.5
VOUT1 (V) (min) 2.7
VOUT1 (V) (max) 24
IOUT1 (A) (max) 0.01
Switch Type Internal
Output Adjust. Method Resistor
# DC-DC Outputs 2
Alternate Topology Step-Up
Switching Frequency (kHz) 480
Package/Pins QSOP/16TQFN/24


MAX685EEE+ Semiconductors - ICs by Analog Devices

DC/DC CONV BOOST/INVERT 480KHZ QSOP16

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

Specifications

Input Voltage Min 2.7V
Input Voltage Max 5.5V
No. of Outputs 2 Output, 2Outputs
DC / DC Converter IC Case QSOP
No. of Pins 16Pins
Output Current - Output 1 10mA
Output Current - Output 2 10mA
Output Voltage - Output 1 24V
Output Voltage - Output 2 24V
Regulator Output Type Adjustable
Switching Frequency 480kHz
Topology Boost Inverting
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Dual-Output (Positive and Nega | Analog Devices
Dc/Dc Conv, Boost/Invert, 480Khz, Qsop16 | Newark Electronics
DC/DC CONV, BOOST/INVERT, 480KHZ, QSOP16 | element14

Frequently Asked Questions

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Is the MAX685EEE+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Analog Devices, CoreStaff, Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX685EEE+ .

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