LT3487 - Boost and Inverting Switching Regulator for CCD Bias

Intelligent soft-start allows sequential soft-start of the two channels with a single capacitor. The soft-start is sequenced such that the output ramp of the negative channel begins after the ramp of the positive channel. Internal sequencing circuitry also disables the negative channel until the positive channel has reached 87% of its final value, ensuring that the sum of the two outputs is always positive.

The LT3487 is available in a 10-pin 3mm × 3mm DFN package.

Features
  • Generates 15V at 45mA, –8V at 90mA from a Li-Ion Cell
  • Output Disconnect
  • Sequencing: Positive Output Reaches Regulation Before Negative Channel Begins Switching
  • Internal Schottky Diodes
  • 2MHz Constant Switching Frequency
  • Requires Only One Resistor per Channel to Set Output Voltages
  • VIN Range: 2.3V to 16V
  • Output Voltage Up to 28V
  • Short-Circuit Robust
  • Capacitor Programmable Soft-Start
  • Separate VBAT Pin Allows Separate Sources for Power and Control Circuitry
  • Available in 10-Lead (3mm × 3mm) DFN Package
Typical Application

Applications
  • CCD Bias
  • TFT LCD Bias
  • OLED Bias
  • ±Rail Generation for Op Amps
Packaging
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT3487EDD#PBF3x3 DFN-10E$3.29$2.30
LT3487EDD#TRPBF3x3 DFN-10E$2.36
Demo Boards
Part NumberDescriptionPrice
DC912ALT3487EDD Demo Board$100.00
Datasheet
Reliability Data
LT Journal
Press Release
LTspice
Related Product
LT3487 - Boost and Inverting Switching Regulator for CCD Bias
LT3487 - 用于 CCD 偏置的升压和负输出转换开关稳压器
R530 - Reliability Data
Sep 2006 CCD Bias Supply Integrates “Output Disconnect,” Schottkys and Feedback Resistors
Sep 2006 J-FET-Based DC/DC Converter Starts and Runs from 300mV Supply
用于 CCD 偏置的升压和负输出型 DC/DC 转换器从锂离子电池提供 45mA/15V 和 90mA/-8V电流
LT3487 Footprints and Symbols
LT3487 Demo Circuit - Boost and Inverting Regulator for CCD Bias (3.3V to 15V@45mA and -8V@90mA)