LTC1261LCS8#TRPBF

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Analog Devices Inc./Maxim Integrated

SWITCHED CAPACITOR REGULATED VOLTAGE INVERTER

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LTC1261LCS8#TRPBF

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Analog Devices Inc./Maxim Integrated

SWITCHED CAPACITOR REGULATED VOLTAGE INVERTER

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC1261L Series

The LTC1261L is a switched-capacitor voltage inverter designed to provide a regulated negative voltage from a single positive supply. The LTC1261L operates from a single 2.7V to 5.25V supply and provides an adjustable output voltage from -1.23V to ±5V. The LTC1261L-4/LTC1261L-4.5 needs a single 4.5V to 5.25V supply and provides a fixed output voltage of -4V to -4.5V respectively. Three external capacitors are required: a 0.1µF flying capacitor and an input and output bypass capacitors. An optional compensation capacitor at ADJ (COMP) can be used to reduce the output voltage ripple.Each version of the LTC1261L will supply up to 20mA output current with guaranteed output regulation of ±3.5%. The LTC1261L includes an open-drain REG output that pulls low when the output is within 5% of the set value. Quiescent current is typically 650µA when operating and 5µA in shutdown.The LTC1261L is available in 8-pin MSOP and SO packages.ApplicationsGaAs FET Bias GeneratorsNegative Supply GeneratorsBattery-Powered SystemsSingle Supply Applications

Technical Specifications

Parameters and characteristics for this part

Specification	LTC1261LCS8#TRPBF

Current - Output	20 mA
Frequency - Switching	650 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	0 °C
Output Configuration	Negative
Output Type	Adjustable
Package Length	0.154 in
Package Name	8-SOIC, 8-SO
Package Width	3.9 mm
Synchronous Rectifier	No
Topology	Charge Pump
Voltage - Input (Max)	5.25 V
Voltage - Input (Min)	2.7 V
Voltage - Output (Max)	-5 V
Voltage - Output (Min/Fixed)	-1.23 V

LTC1261L Series

Switched Capacitor Regulated Voltage Inverter

Part	Synchronous Rectifier	Package Name	Voltage - Input (Min)	Package Length	Package Width	Frequency - Switching	Voltage - Output (Min/Fixed)	Number of Outputs	Voltage - Input (Max)	Output Type	Current - Output	Operating Temperature (Max)	Operating Temperature (Min)	Mounting Type	Function	Output Configuration	Topology	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated LTC1261LIS8-4#TRPBF	No	8-SO 8-SOIC	4.5 V	0.154 in	3.9 mm	650 kHz	-4 V	1	5.25 V	Fixed	20 mA	85 °C	-40 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump
Analog Devices Inc./Maxim Integrated LTC1261LIMS8-4.5#TRPBF	No	8-MSOP 8-TSSOP 8-MSOP	4.5 V	0.118 in	3 mm	650 kHz	-4.5 V	1	5.25 V	Fixed	20 mA	85 °C	-40 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump
Analog Devices Inc./Maxim Integrated LTC1261LCMS8-4#TRPBF	No	8-MSOP 8-TSSOP 8-MSOP	4.5 V	0.118 in	3 mm	650 kHz	-4 V	1	5.25 V	Fixed	20 mA	70 °C	0 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump
Analog Devices Inc./Maxim Integrated LTC1261LIS8#TRPBF	No	8-SO 8-SOIC	2.7 V	0.154 in	3.9 mm	650 kHz	-1.23 V	1	5.25 V	Adjustable	20 mA	85 °C	-40 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump	-5 V
Analog Devices Inc./Maxim Integrated LTC1261LCS8#PBF	No	8-SO 8-SOIC	2.7 V	0.154 in	3.9 mm	650 kHz	-1.23 V	1	5.25 V	Adjustable	20 mA	70 °C	0 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump	-5 V
Analog Devices Inc./Maxim Integrated LTC1261LCS8-4#TRPBF	No	8-SO 8-SOIC	4.5 V	0.154 in	3.9 mm	650 kHz	-4 V	1	5.25 V	Fixed	20 mA	70 °C	0 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump
Analog Devices Inc./Maxim Integrated LTC1261LIS8#PBF	No	8-SO 8-SOIC	2.7 V	0.154 in	3.9 mm	650 kHz	-1.23 V	1	5.25 V	Adjustable	20 mA	85 °C	-40 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump	-5 V
Analog Devices Inc./Maxim Integrated LTC1261LCS8-4#PBF	No	8-SO 8-SOIC	4.5 V	0.154 in	3.9 mm	650 kHz	-4 V	1	5.25 V	Fixed	20 mA	70 °C	0 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump
Analog Devices Inc./Maxim Integrated LTC1261LCS8-4.5#TRPBF	No	8-SO 8-SOIC	4.5 V	0.154 in	3.9 mm	650 kHz	-4.5 V	1	5.25 V	Fixed	20 mA	70 °C	0 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump
Analog Devices Inc./Maxim Integrated LTC1261LCS8-4.5#PBF	No	8-SO 8-SOIC	4.5 V	0.154 in	3.9 mm	650 kHz	-4.5 V	1	5.25 V	Fixed	20 mA	70 °C	0 °C	Surface Mount	Step-Down Step-Up	Negative	Charge Pump

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

LTC1261LCS8#TRPBF | Datasheet

R320 Reliability Data