LT1615 - Micropower Step-Up DC/DC Converters in ThinSOT

Features

  • Low Quiescent Current:
    20µA in Active Mode
    <1µA in Shutdown Mode
  • Operates with VIN as Low as 1V
  • Low VCESAT Switch: 250mV at 300mA
  • Uses Small Surface Mount Components
  • High Output Voltage: Up to 34V
  • Low Profile (1mm) ThinSOT™ Package

Typical Application

LT1615
LT1615
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Description

The LT1615/LT1615-1 are micropower step-up DC/DC converters in a 5-lead low profile (1mm) ThinSOT package. The LT1615 is designed for higher power systems with a 350mA current limit and an input voltage range of 1.2V to 15V, whereas the LT1615-1 is intended for lower power and single-cell applications with a 100mA current limit and an extended input voltage range of 1V to 15V. Otherwise, the two devices are functionally equivalent. Both devices 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 in a simple boost topology without the use of costly transformers. The LT1615’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.

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Packaging

ThinSOT

LT1615
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1615ES5 SOT 5 E $2.01   View
LT1615ES5#PBF SOT 5 E $2.01   View
LT1615ES5#TR SOT 5 E $2.01 $1.70 View
LT1615ES5#TRM SOT 5 E $2.01 $1.72 View
LT1615ES5#TRMPBF SOT 5 E $2.01 $1.72 View
LT1615ES5#TRPBF SOT 5 E $2.01 $1.70 View
LT1615ES5-1 SOT 5 E $2.01   View
LT1615ES5-1#PBF SOT 5 E $2.01   View
LT1615ES5-1#TR SOT 5 E $2.01 $1.70 View
LT1615ES5-1#TRM SOT 5 E $2.01 $1.72 View
LT1615ES5-1#TRMPBF SOT 5 E $2.01 $1.72 View
LT1615ES5-1#TRPBF SOT 5 E $2.01 $1.70 View
LT1615IS5 SOT 5 I $2.31   View
LT1615IS5#PBF SOT 5 I $2.31   View
LT1615IS5#TR SOT 5 I $2.31 $1.96 View
LT1615IS5#TRM SOT 5 I $2.31 $1.98 View
LT1615IS5#TRMPBF SOT 5 I $2.31 $1.98 View
LT1615IS5#TRPBF SOT 5 I $2.31 $1.96 View
LT1615IS5-1 SOT 5 I $2.93   View
LT1615IS5-1#PBF SOT 5 I $2.93   View
LT1615IS5-1#TR SOT 5 I $2.93 $1.96 View
LT1615IS5-1#TRM SOT 5 I $2.93 $1.98 View
LT1615IS5-1#TRMPBF SOT 5 I $2.93 $1.98 View
LT1615IS5-1#TRPBF SOT 5 I $2.93 $1.96 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.

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Applications

  • LCD Bias
  • Handheld Computers
  • Battery Backup
  • Digital Cameras
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Simulate

LTSpice / SwitcherCAD III is a powerful FREE circuit simulator and schematic capture program, providing macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

  • Step 1. If you do not already have a copy of LTSpice, click here to download and install LTSpice / SwitcherCAD III

  • Step 2. Once LTSpice is installed, click here for a ready to run  demonstration circuit of the LT1615 in a boost configuration.

  • Step 3. If LTspice / SwitcherCAD III does not automatically open after clicking the above link, 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 demonstartion circuit by selecting "Open" from the "File" menu.
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