Power Management Inductorless (Charge Pump) DC/DC Converters Regulated Step-Up Charge Pumps

LTC1682 - Doubler Charge Pumps with Low Noise Linear Regulator

Features

  • Low Output Noise: 60µVRMS (100kHz BW)
  • Adjustable or Fixed Boosted Output
  • Adjustable Output Voltage Range: 2.5V to 5.5V
  • Fixed Output Voltages: 3.3V, 5V
  • Wide Input Voltage Range: 1.8V to 4.4V
  • Uses Small Ceramic Capacitors
  • No Inductors Required
  • Output Current up to 50mA
  • 550kHz Switching Frequency
  • Low Operating Current: 150µA
  • Low Shutdown Current: 1µA
  • Internal Thermal Shutdown and Current Limiting
  • Available in 8-Pin MSOP and SO Packages
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages

Typical Application

LTC1682 Typical Application
LTC1682 Typical Application

Description

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 Vout via 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 VIN by disabling the regulator and discharges Vout to ground through a 100Ohms 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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LTC1682CMS8-3.3#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1682CMS8-3.3#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1682CMS8-5#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1682CMS8-5#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1682CMS8#PBF MS-8 MS8 C 05-08-1660 Yes
LTC1682CMS8#TRPBF MS-8 MS8 C 05-08-1660 Yes
LTC1682CS8-3.3#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1682CS8-3.3#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1682CS8-5#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1682CS8-5#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1682CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1682CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LTC1682IMS8-3.3#PBF MS-8 MS8 I 05-08-1660 Yes
LTC1682IMS8-3.3#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC1682IMS8-5#PBF MS-8 MS8 I 05-08-1660 Yes
LTC1682IMS8-5#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC1682IMS8#PBF MS-8 MS8 I 05-08-1660 Yes
LTC1682IMS8#TRPBF MS-8 MS8 I 05-08-1660 Yes
LTC1682IS8-3.3#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1682IS8-3.3#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1682IS8-5#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1682IS8-5#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1682IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LTC1682IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LTC1682 Package Drawing
LTC1682 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC1682CMS8-3.3#PBF MS-8 C $2.30 $1.90 Yes
LTC1682CMS8-3.3#TRPBF MS-8 C $1.96 Yes
LTC1682CMS8-5#PBF MS-8 C $2.30 $1.90 Yes
LTC1682CMS8-5#TRPBF MS-8 C $1.96 Yes
LTC1682CMS8#PBF MS-8 C $2.30 $1.90 Yes
LTC1682CMS8#TRPBF MS-8 C $1.96 Yes
LTC1682CS8-3.3#PBF SO-8 C $2.00 $1.70 Yes
LTC1682CS8-3.3#TRPBF SO-8 C $1.76 Yes
LTC1682CS8-5#PBF SO-8 C $2.00 $1.70 Yes
LTC1682CS8-5#TRPBF SO-8 C $1.76 Yes
LTC1682CS8#PBF SO-8 C $2.00 $1.70 Yes
LTC1682CS8#TRPBF SO-8 C $1.76 Yes
LTC1682IMS8-3.3#PBF MS-8 I $2.65 $2.25 Yes
LTC1682IMS8-3.3#TRPBF MS-8 I $2.31 Yes
LTC1682IMS8-5#PBF MS-8 I $2.65 $2.25 Yes
LTC1682IMS8-5#TRPBF MS-8 I $2.31 Yes
LTC1682IMS8#PBF MS-8 I $2.65 $2.25 Yes
LTC1682IMS8#TRPBF MS-8 I $2.31 Yes
LTC1682IS8-3.3#PBF SO-8 I $2.35 $2.00 Yes
LTC1682IS8-3.3#TRPBF SO-8 I $2.06 Yes
LTC1682IS8-5#PBF SO-8 I $2.35 $2.00 Yes
LTC1682IS8-5#TRPBF SO-8 I $2.06 Yes
LTC1682IS8#PBF SO-8 I $2.35 $2.00 Yes
LTC1682IS8#TRPBF SO-8 I $2.06 Yes
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC249A-A LTC1682CMS8 | Doubler Charge Pump with Linear Regulator, Adjustable, 1.8 to 4.4Vin, 2.5 to 5.5Vout @ 50mA Contact Factory
DC249A-B LTC1682CMS8-5 | Doubler Charge Pump with Linear Regulator, Fixed, 2.7 to 4.4Vin, 5.0Vout @ 50mA Contact Factory
DC249A-C LTC1682CMS8-3.3 | Doubler Charge Pump with Linear Regulator, Fixed, 2.0 to 4.4Vin, 3.3Vout @ 50mA Contact Factory
DC332A LTC1682CMS8 | White LED Driver, 3.0V to 4.2V Input, 75mA Output (5 White LEDs) Contact Factory
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LTC1682IMS8-3.3#PBF MS-8 I $2.65 $2.25 Yes
LTC1682IMS8-3.3#TRPBF MS-8 I $2.31 Yes
LTC1682IMS8-5#PBF MS-8 I $2.65 $2.25 Yes
LTC1682IMS8-5#TRPBF MS-8 I $2.31 Yes
LTC1682IMS8#PBF MS-8 I $2.65 $2.25 Yes
Buy Now • Request Samples
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Applications

  • VCO Power Supplies in Cellular Phones
  • 2-Way Pagers
  • Wireless PCMCIA Cards
  • Portable Medical Instruments
  • Low Power Data Acquisition
  • Remote Transmitters

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Design Tools

LTspice

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Models for the following parts are available in LTspice:
LTC1682
LTC1682-3.3
LTC1682-5

Technical Support