Power Management Switching Regulator Inverting Regulators
Power Management Switching Regulator LCD/CCD/OLED Bias
 Power Management Switching Regulator Step-Up (Boost) Regulators Micropower Boost
 Power Management Switching Regulator Step-Up (Boost) Regulators Internal Power Switch Boost
 Power Management Switching Regulator Step-Up (Boost) Regulators Multiple Output Boost
 Power Management PMIC & Multifunction Multi-Topology DC/DC

LT1945 - Dual Micropower DC/DC Converter with Positive and Negative Outputs

Features

  • Generates Well-Regulated Positive and Negative Outputs
  • Low Quiescent Current:
    20µA in Active Mode (per Converter)
    <1µA in Shutdown Mode
  • Operates with VIN as Low as 1.2V
  • Low VCESAT Switch: 250mV at 300mA
  • Uses Small Surface Mount Components
  • High Output Voltage: Up to ±34V
  • Tiny 10-Pin MSOP Package

Typical Application

LT1945 Typical Application
LT1945 Typical Application

Description

The LT1945 is a dual micropower DC/DC converter in a 10-pin MSOP package. Each converter is designed with a 350mA current limit and an input voltage range of 1.2V to 15V, making the LT1945 ideal for a wide variety of applications. Both converters feature a quiescent current of only 20µA at no load, which further reduces to 0.5µA in shutdown. A current limited, fixed off-time control scheme conserves operating current, resulting in high efficiency over a broad range of load current. The 36V switch allows high voltage outputs up to ±34V to be easily generated without the use of costly transformers. The LT1945’s low off-time of 400ns permits the use of tiny, low profile inductors and capacitors to minimize footprint and cost in space-conscious portable applications.

Packaging

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

MS-10

LT1945 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1945EMS MSOP 10 E $2.44 $2.06 View
LT1945EMS#PBF MSOP 10 E $2.44 $2.06 View
LT1945EMS#TR MSOP 10 E $2.12 View
LT1945EMS#TRPBF MSOP 10 E $2.12 View
LT1945IMS#PBF MSOP 10 I $3.39 $2.37 View
LT1945IMS#TRPBF MSOP 10 I $2.43 View
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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.

Click here to view our complete list of demo boards

Applications

  • Small TFT LCD Panels
  • Handheld Computers
  • Battery Backup
  • Digital Cameras

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Related models available in LTspice IV
LT1945

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