Features and Benefits
- Output Voltages:
- 3.2V to 12.775V and –1.2V to –13.95V (LT3582)
- 5V and –5V (LT3582-5)
- 12V and –12V (LT3582-12)
- Digitally Re-Programmable (LT3582) via I2C for:
- Output Voltages
- Power Sequencing
- Output Voltage Ramp Rates
- Power-Up Defaults Settable with Non-Volatile OTP (LT3582)
- I2C Compatible Interface (Standard Mode*)
- All Power Switches Integrated
- 350mA Current Limit (Boost)
- 600mA Current Limit (Inverting)
- All Feedback Resistors Integrated
- Input Voltage Range: 2.55V to 5.5V
- Low Quiescent Current
- 325μA in Active Mode
- 0.01μA in Shutdown Mode
- Integrated Output Disconnect
- Tiny 16-Pin 3mm × 3mm QFN Package
The LT3582/LT3582-5/LT3582-12 are dual DC/DC converters featuring positive and negative outputs and integrated feedback resistors. The LT3582, with its built-in One Time Programming (OTP), has configurable output settings via the I2C interface, including output voltage settings, power-up sequencing, power-down discharge, and output voltage ramp rates. LT3582 settings can be changed adaptively in the final product, or set during manufacturing and made permanent using the built in non-volatile OTP memory. The positive output voltage can be set between 3.2V and 12.775V in 25mV steps. The negative output voltage can be set between –1.2V and –13.95V in –50mV steps. The LT3582-5 and LT3582-12 are pre-configured at the factory for ±5V and ±12V outputs respectively, and as such, don’t require the use of the I2C interface.
The LT3582 series includes two monolithic converters, one Boost and one Inverting. The Boost converter has an integrated power switch and output disconnect switch. The Inverting converter uses a single inductor topology and includes an integrated power switch. Both Boost and Inverting converters use a novel** control scheme resulting in low output voltage ripple while allowing for high conversion efficiency over a wide load current range. The LT3582 series is available in a 16-pin 3mm × 3mm QFN.
- AMOLED Power
- CCD Power
- General Purpose DC/DC Conversion
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Demonstration circuit 1247A features the LT3582 an I2C Programmable Boost and Single Inductor Inverting DC/DC Converters with OTP. It converts a 2.7V-5.5V source to two outputs, a positive and a negative. The positive output can be programmed from 3.2V to 12.775V at 25mV intervals and the negative from -1.2V to -13.95V at 50mV intervals, all via the QuickEval™ System. A DC590B is needed for evaluation of this demo board. Table 1 below shows the maximum expected load currents for some output/input combinations. Check Maximum Load Current section on datasheet for other combinations. The LT3582 features all integrated switches and feedback resistors, a low noise control scheme, positive output disconnect function, low quiescent current, built in softstart.
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
Sample & Buy
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.