Power Management Inductorless (Charge Pump) DC/DC Converters Regulated Inverting Charge Pumps

LTC3261 - High Voltage, Low Quiescent Current Inverting Charge Pump

LTC3265 - Low Noise Dual Supply with Boost and Inverting Charge Pumps

LTC1983 - 100mA Regulated Charge-Pump Inverters in ThinSOT

Features

  • Fixed Output Voltages: -3V, -5V or Low Noise VIN to -VIN Inverted Output
  • ±4% Output Voltage Accuracy
  • Low Quiesient Current: 25µA
  • 100mA Output Current Capability
  • 2.3V to 5.5V Operating Voltage Range
  • Internal 900kHz Oscillator
  • "Zero Current" Shutdown
  • Short-Circuit and Over-Temperature Protected
  • Low Profile (1mm) ThinSOT™ Package

Typical Application

LTC1983 Typical Application
LTC1983 Typical Application

Description

The LTC1983-3 and LTC1983-5 are inverting charge pump DC/DC converters that produce negative regulated outputs. The parts require only three tiny external capacitors and can provide up to 100mA of output current. The devices can operate in open loop mode (creating a -VIN supply) or regulated output mode depending on the input supply voltage and the output current.

The LTC1983-3/LTC1983-5 have many useful features for portable applications including very low quiescent current (25µA typical) and a zero current shutdown mode programmed through the SHDN pin.

The LTC1983-3/LTC1983-5 are over-temperature and short-circuit protected. The parts are available in a 6-pin low profile (1mm) ThinSOT package.

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
LTC1983ES6-3#PBF SOT-23 S6 E 05-08-1636 Yes
LTC1983ES6-3#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LTC1983ES6-3#TRPBF SOT-23 S6 E 05-08-1636 Yes
LTC1983ES6-5#PBF SOT-23 S6 E 05-08-1636 Yes
LTC1983ES6-5#TRMPBF SOT-23 S6 E 05-08-1636 Yes
LTC1983ES6-5#TRPBF SOT-23 S6 E 05-08-1636 Yes


LTC1983 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
LTC1983ES6-3#PBF SOT-23 E $2.13 Yes
LTC1983ES6-3#TRMPBF SOT-23 E $2.17 $1.83 Yes
LTC1983ES6-3#TRPBF SOT-23 E $2.17 $1.81 Yes
LTC1983ES6-5#PBF SOT-23 E $2.13 Yes
LTC1983ES6-5#TRMPBF SOT-23 E $2.17 $1.83 Yes
LTC1983ES6-5#TRPBF SOT-23 E $2.17 $1.81 Yes
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* 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
DC482A LTC1983ES6-5 | 100mA Regulated Charge-Pump Inverter, 3V-5.5V Input, -5Vout, Iout up to 100mA Max. $75.00
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Click here to view our complete list of demo boards

Applications

  • –3V Generation in Single-Supply Systems
  • Portable Equipment
  • LCD Bias Supplies
  • GaAs FET Bias Supplies

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice:
LTC1983-3
LTC1983-5

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