LTC1682IS8#PBF

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Analog Devices Inc./Maxim Integrated

DOUBLER CHARGE PUMPS WITH LOW NOISE LINEAR REGULATOR

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LTC1682IS8#PBF

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Analog Devices Inc./Maxim Integrated

DOUBLER CHARGE PUMPS WITH LOW NOISE LINEAR REGULATOR

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Description Specifications Series Pricing CAD Documents

Description

General part information

LTC1682 Series

The LTC1682/LTC1682-3.3/LTC1682-5 are doubler charge pumps with an internal low noise, low dropout (LDO) linear regulator. These parts are designed to provide a low noise boosted supply voltage for powering noise sensitive devices such as high frequency VCOs in wireless applications.An internal doubler charge pump converts a 1.8V to 4.4V input to a boosted output, while the internal LDO regulator converts the boosted voltage to a low noise regulated output. The adjustable version allows the user to set VOUTvia external resistors connected to FB. The regulator is capable of supplying up to 50mA of output current. Shutdown reduces the supply current to < 5µA, removes the load from VINby disabling the regulator and discharges VOUTto ground through a 100Ω switch.The LTC1682 LDO regulator is stable with only 2µF on the output. Small ceramic capacitors can be used, reducing PC board area.The LTC1682/LTC1682-3.3/LTC1682-5 are short-circuit and over temperature protected. The parts are available in 8-pin MSOP and SO packages.ApplicationsVCO Power Supplies in Cellular Phones2-Way PagersWireless PCMCIA CardsPortable Medical InstrumentsLow Power Data AcquisitionRemote Transmitters

Technical Specifications

Parameters and characteristics for this part

Specification	LTC1682IS8#PBF

Current - Output	50 mA
Frequency - Switching	550 kHz
Function	Step-Up, Step-Down
Mounting Type	Surface Mount
Number of Outputs	1
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Type	Adjustable
Package Length	0.154 in
Package Name	8-SO, 8-SOIC
Package Width	3.9 mm
Synchronous Rectifier	No
Topology	Charge Pump
Voltage - Input (Max)	4.4 V
Voltage - Input (Min)	1.8 V
Voltage - Output (Max)	5.5 V
Voltage - Output (Min/Fixed)	2.5 V

LTC1682 Series

Doubler Charge Pumps with Low Noise Linear Regulator

Part	Package Length	Package Name	Package Width	Number of Outputs	Operating Temperature (Min)	Operating Temperature (Max)	Voltage - Input (Min)	Output Type	Synchronous Rectifier	Function	Voltage - Input (Max)	Output Configuration	Current - Output	Voltage - Output (Min/Fixed)	Mounting Type	Topology	Frequency - Switching	Voltage - Output (Max)
Analog Devices Inc./Maxim Integrated LTC1682CS8-3.3#PBF	0.154 in	8-SO 8-SOIC	3.9 mm	1	0 °C	70 °C	1.8 V	Fixed	No	Step-Down Step-Up	4.4 V	Positive	50 mA	3.3 V	Surface Mount	Charge Pump	550 kHz
Analog Devices Inc./Maxim Integrated LTC1682IMS8#PBF	0.118 in	8-MSOP 8-TSSOP 8-MSOP	3 mm	1	-40 °C	85 °C	1.8 V	Adjustable	No	Step-Down Step-Up	4.4 V	Positive	50 mA	2.5 V	Surface Mount	Charge Pump	550 kHz	5.5 V
Analog Devices Inc./Maxim Integrated LTC1682CS8#TRPBF	0.154 in	8-SO 8-SOIC	3.9 mm	1	0 °C	70 °C	1.8 V	Adjustable	No	Step-Down Step-Up	4.4 V	Positive	50 mA	2.5 V	Surface Mount	Charge Pump	550 kHz	5.5 V
Analog Devices Inc./Maxim Integrated LTC1682IS8-5#PBF	0.154 in	8-SO 8-SOIC	3.9 mm	1	-40 °C	85 °C	1.8 V	Fixed	No	Step-Up	4.4 V	Positive	50 mA	5 V	Surface Mount	Charge Pump	550 kHz
Analog Devices Inc./Maxim Integrated LTC1682IS8-3.3#TRPBF	0.154 in	8-SO 8-SOIC	3.9 mm	1	-40 °C	85 °C	1.8 V	Fixed	No	Step-Down Step-Up	4.4 V	Positive	50 mA	3.3 V	Surface Mount	Charge Pump	550 kHz
Analog Devices Inc./Maxim Integrated LTC1682IMS8-5#TRPBF	0.118 in	8-MSOP 8-TSSOP 8-MSOP	3 mm	1	-40 °C	85 °C	1.8 V	Fixed	No	Step-Up	4.4 V	Positive	50 mA	5 V	Surface Mount	Charge Pump	550 kHz
Analog Devices Inc./Maxim Integrated LTC1682CMS8-5#TRPBF	0.118 in	8-MSOP 8-TSSOP 8-MSOP	3 mm	1	0 °C	70 °C	1.8 V	Fixed	No	Step-Up	4.4 V	Positive	50 mA	5 V	Surface Mount	Charge Pump	550 kHz
Analog Devices Inc./Maxim Integrated LTC1682IS8#PBF	0.154 in	8-SO 8-SOIC	3.9 mm	1	-40 °C	85 °C	1.8 V	Adjustable	No	Step-Down Step-Up	4.4 V	Positive	50 mA	2.5 V	Surface Mount	Charge Pump	550 kHz	5.5 V
Analog Devices Inc./Maxim Integrated LTC1682IS8-3.3#PBF	0.154 in	8-SO 8-SOIC	3.9 mm	1	-40 °C	85 °C	1.8 V	Fixed	No	Step-Down Step-Up	4.4 V	Positive	50 mA	3.3 V	Surface Mount	Charge Pump	550 kHz
Analog Devices Inc./Maxim Integrated LTC1682CMS8-5#PBF	0.118 in	8-MSOP 8-TSSOP 8-MSOP	3 mm	1	0 °C	70 °C	1.8 V	Fixed	No	Step-Up	4.4 V	Positive	50 mA	5 V	Surface Mount	Charge Pump	550 kHz

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

R402 Reliability Data

LTC1682IS8#PBF | Datasheet