LT3582/LT3582-5/LT3582-12 Boost and Single Inductor Inverting DC/DC Converters with Optional I2C Programing and OTP FEATURESDESCRIPTION n Output Voltages: The LT®3582/LT3582-5/LT3582-12 are dual DC/DC converters 3.2V to 12.775V and –1.2V to –13.95V (LT3582) featuring positive and negative outputs and integrated feedback 5V and –5V (LT3582-5) resistors. The LT3582, with its built-in One Time Programming 12V and –12V (LT3582-12) (OTP), has confi gurable output settings via the I2C interface, n Digitally Re-Programmable (LT3582) via I2C for: including output voltage settings, power-up sequencing, OutputVoltages power-down discharge, and output voltage ramp rates. LT3582 PowerSequencing settings can be changed adaptively in the fi nal product, or set Output Voltage Ramp Rates during manufacturing and made permanent using the built in n Power-Up Defaults Settable with Non-Volatile OTP non-volatile OTP memory. The positive output voltage can be (LT3582) set between 3.2V and 12.775V in 25mV steps. The negative n I2C Compatible Interface (Standard Mode*) output voltage can be set between –1.2V and –13.95V in n All Power Switches Integrated –50mV steps. The LT3582-5 and LT3582-12 are pre-confi gured 350mA Current Limit (Boost) at the factory for ±5V and ±12V outputs respectively, and as 600mA Current Limit (Inverting) such, don’t require the use of the I2C interface. n All Feedback Resistors Integrated The LT3582 series includes two monolithic converters, n Input Voltage Range: 2.55V to 5.5V one Boost and one Inverting. The Boost converter has an n Low Quiescent Current integrated power switch and output disconnect switch. 325μA in Active Mode The Inverting converter uses a single inductor topology 0.01μA in Shutdown Mode and includes an integrated power switch. Both Boost n Integrated Output Disconnect and Inverting converters use a novel** control scheme n Tiny 16-Pin 3mm × 3mm QFN Package resulting in low output voltage ripple while allowing for high APPLICATIONS conversion effi ciency over a wide load current range. The LT3582 series is available in a 16-pin 3mm × 3mm QFN. n AMOLED Power L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n CCD Power Technology Corporation. All other trademarks are the property of their respective owners. * Input thresholds are reduced to allow communication with low voltage digital ICs. n General Purpose DC/DC Conversion (See Electrical Characteristics). ** Patent Pending TYPICAL APPLICATION±12V Supplies from a Single 5V InputEffi ciency and Power Loss 95 350 SWN SHDN VOUTP INPUT VOUTN SWN VIN 300 4.5V TO 5.5V 6.8μH 6.8μH 85 SWP POWER LOSS (mW) 250 GND 75 LT3582 4.7μF 200 1μF 65 10μF V 150 NEG CAPP –12V VOUTN EFFICIENCY (%) CAPP 55 85mA VPOS 100 I2C SDA VOUTP 12V INTERFACE 80mA 45 SCL V OPTIONAL ON PP 50 4.7μF LT3582-5/LT3582-12 CA RAMPP RAMPN 35 0 3582512 TA01a 0.1 1 10 100 10nF 10nF LOAD CURRENT (mA) 3582512 TA01b 3582512fb 1
