LTC1515 Series

Step-Up/Step-Down Switched Capacitor DC/DC Converters with RESET

Catalog

Step-Up/Step-Down Switched Capacitor DC/DC Converters with RESET

Part	Output Type	Package / Case	Package / Case [y]	Package / Case [x]	Operating Temperature [Max]	Operating Temperature [Min]	Frequency - Switching	Number of Outputs	Current - Output	Voltage - Input (Max) [Max]	Voltage - Output (Max) [Max]	Output Configuration	Voltage - Input (Min) [Min]	Voltage - Output (Min/Fixed) [Min]	Function	Mounting Type	Supplier Device Package	Voltage - Output (Min/Fixed)
Analog Devices LTC1515CS8#TRPBF	Adjustable	8-SOIC	3.9 mm	0.154 in	70 °C	0 °C	650 kHz	1	50 mA	10 V	20 V	Positive	2 V	1.232 V	Step-Up/Step-Down	Surface Mount	8-SO
Analog Devices LTC1515IS8-3/5#TRPBF	Programmable	8-SOIC	3.9 mm	0.154 in	85 °C	-40 °C	650 kHz	1	50 mA	10 V		Positive	2 V		Step-Up/Step-Down	Surface Mount	8-SO	3 V 5 V
Analog Devices LTC1515IS8-3/5#PBF	Programmable	8-SOIC	3.9 mm	0.154 in	85 °C	-40 °C	650 kHz	1	50 mA	10 V		Positive	2 V		Step-Up/Step-Down	Surface Mount	8-SO	3 V 5 V

Catalog

Step-Up/Step-Down Switched Capacitor DC/DC Converters with RESET

Key Features

• Adjustable/Selectable 3V, 3.3V or 5V Output Voltages

• 2V to 10V Input Voltage Range

• Up to 50mA Output Current

• Only Three External Capacitors Required

• Soft Start Limits Inrush Current at Turn-On

• Low Operating Current: 60µA

• Very Low Shutdown Current: < 1µA

• Shutdown Disconnects Load from VIN

• VOUTProgrammable to 3V/5V or 3.3V/5V

• Short-Circuit and Overtemperature Protected

• 650kHz Switching Frequency

• Open-Drain Power-On Reset Output

• Available in SO-8 Package

Description

The LTC1515, LTC1515-3/5 and LTC1515-3.3/5 are micropower switched capacitor DC/DC converters that produce a regulated output voltage by either stepping up or stepping down the input voltage. Output voltage is adjustable using an external resistor divider (LTC1515) or programmable to either 3V/5V (LTC1515-3/5) or 3.3V/5V (LTC1515-3.3/5) using a logic pin.A unique architecture allows the parts to accommodate a wide input voltage range (2V to 10V) while maintaining ±4% regulation. Additional circuitry prevents excessive inrush current and output voltage ripple when large VINto VOUTdifferentials are present.An internal power-on reset circuit forces the POR pin low on initial power-up. The POR output remains low until 200ms (typ) after VOUTis in regulation.The parts are short-circuit and over-temperature protected. Battery life is maximized by very low operating currents (ICC= 60µA typ, ICC<1µA in shutdown). All three parts are available in an SO-8 package.ApplicationsSIM Interface in GSM Cellular TelephonesSmart Card ReadersLocal Power SuppliesPortable Equipment