LT3472 Series

Boost and Inverting DC/DC Converter for CCD Bias

Catalog

Boost and Inverting DC/DC Converter for CCD Bias

Part	Voltage - Input (Min) [Min]	Voltage - Output (Max)	Current - Output	Output Configuration	Voltage - Output (Min/Fixed)	Number of Outputs	Mounting Type	Supplier Device Package	Voltage - Input (Max) [Max]	Output Type	Topology	Frequency - Switching	Operating Temperature [Max]	Operating Temperature [Min]	Function	Synchronous Rectifier	Package / Case
Analog Devices LT3472EDD#TRPBF	2.2 V	34 V	50 mA	Positive and Negative (Dual Rail)	2.2 V	2	Surface Mount	10-DFN (3x3)	16 V	Adjustable	Boost Cuk	1.1 MHz	70 °C	0 °C	Step-Up Step-Up/Step-Down		10-WFDFN Exposed Pad
Analog Devices LT3472EDD#PBF	2.2 V	34 V	50 mA	Positive and Negative (Dual Rail)	2.2 V	2	Surface Mount	10-DFN (3x3)	16 V	Adjustable	Boost Cuk	1.1 MHz	70 °C	0 °C	Step-Up Step-Up/Step-Down		10-WFDFN Exposed Pad

Catalog

Boost and Inverting DC/DC Converter for CCD Bias

Key Features

• Generates 15V at 20mA, –8V at 50mA from a Li-Ion Cell

• Internal Schottky Diodes

• VINRange: 2.2V to 16V

• Output Voltages Up to ±34V

• Capacitor-Programmable Soft-Start

• Sequencing: Positive Output Reaches 88% of Final Value Before Negative Output Begins

• Requires Only One Resistor to Set Output Voltage

• Constant Switching Frequency Ensures Low Noise Outputs

• Available in a 10-Lead (3mm × 3mm) DFN Package

Description

The LT3472 dual channel switching regulator generates positive and negative outputs for biasing CCD imagers. The device delivers up to –8V at 50mA and 15V at 20mA from a lithium-ion cell, providing bias for many popular CCD imagers. Switching at 1.1MHz, the LT3472 uses tiny, low profile capacitors and inductors and generates low noise outputs that are easy to filter. Schottky diodes are internal and the output voltages are set with one resistor per channel, reducing external component count. The entire solution is less than 1mm profile and occupies just 50mm2.Internal sequencing circuitry disables the negative channel until the positive channel has reached 88% of its final value, ensuring that the sum of the two outputs is always positive. Separate soft-start capacitors for each output allow the ramp of each output to be independently controlled.The LT3472 is available in a low profile (0.75mm) 10-pin 3mm × 3mm DFN package.ApplicationsCCD BiasTFT LCD BiasOLED Bias± Rail Generation for Op Amps