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LTC3100EUD-TRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC3100EUD-TRPBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 24 page LTC3100 1 3100fa SWBST VINBK VBST LTC3100 FBBST 3.3μH 1.87M 1.07M 3.3V AT 100mA 10μF 2 2.2μF VLDO VINBST FBLDO SWBK PGBK PGBST 102k 25.5k BOOST LDO BUCK VBATT 1.6V TO 3.2V 2.2μF FBBK 2M 1M 10μF 3100 TA01a MODE RUNBST RUNLDO RUNBK GND FF EN_BURST OFF ON OFF ON OFF ON 4.7μH VBOOST 3V AT 50mA VLDO 1.8V AT 200mA VBUCK BOOST_GOOD BUCK_GOOD 1M 1M The LTC®3100 combines a high efficiency 700mA syn- chronous step-up converter, a 250mA synchronous step-down converter and a 100mA LDO regulator. The LTC3100 features a wide input voltage range of 0.65V to 5V. The step-down converter can be powered by the output of the step-up converter or from a separate power source between 1.8V and 5.5V. The LDO can also be used as a sequencing switch on the output of the boost. A switching frequency of 1.5MHz minimizes solution foot- print by allowing the use of tiny, low profile inductors and ceramic capacitors. The switching regulators use current mode control and are internally compensated, reducing external parts count. Each converter automatically transi- tions to Burst Mode operation to maintain high efficiency over the full load range. Burst Mode operation can be disabled for low noise applications. The integrated LDO provides a third low noise, low dropout supply. Anti-ringing circuitry reduces EMI by damping the boost inductor in discontinuous mode. Additional features include shutdown current of under 1μA and overtem- perature shutdown. The LTC3100 is housed in a 16-lead 3mm × 3mm 0.75mm QFN package. TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION 1.5MHz Synchronous Dual Channel DC/DC Converter and 100mA LDO Two-Cell, Triple Output Converter n Extremely Compact Triple-Rail Solution n Burst Mode® Operation, IQ = 15μA n 1.5MHz Fixed Frequency Operation n Power Good Indicators n 700mA Synchronous Step-Up DC/DC 0.65V to 5V VIN Range 1.5V to 5.25V VOUT Range 94% Peak Efficiency VIN > VOUT Operation Output Disconnect n 250mA Synchronous Step-Down DC/DC 1.8V to 5.5V VIN Range 0.6V to 5.5V VOUT Range n LDO (VIN Internally Tied to VBST) 0.6V to 5.25V VOUT Range 200mV Dropout Voltage at 100mA n Available in a 16-Lead 3mm × 3mm QFN Package n Bar Code Readers n Medical Instruments n Low Power Portable Electronic Devices , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Efficiency and Power Loss vs Load Current, VIN = 2.4V LOAD CURRENT (mA) 30 50 80 0.01 10 100 1000 0 10 0.1 1 100 70 90 40 60 20 100 0.01 1000 1 10 0.1 3100 TA01b BOOST BUCK PL, BOOST PL, BUCK |
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