LT1117 - 800mA Low Dropout Positive Regulators Adjustable and Fixed 2.85V,3.3V, 5V

Features

  • Space Saving SOT-223 Surface Mount Package
  • Three-Terminal Adjustable or Fixed 2.85V, 3.3V, 5V
  • Output Current of 800mA
  • Operates Down to 1V Dropout
  • Guaranteed Dropout Voltage at Multiple Current Levels
  • 0.2% Line Regulation Max
  • 0.4% Load Regulation Max

Typical Application

LT1117
LT1117
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Description

The LT1117 is a positive low dropout regulator designed to provide up to 800mA of output current. The device is available in an adjustable version and fixed output voltages of 2.85V, 3.3V and 5V. The 2.85V version is designed specifically to be used in Active Terminators for the SCSI bus. All internal circuitry is designed to operate down to 1V input to output differential. Dropout voltage is guaranteed at a maximum of 1.2V at 800mA, decreasing at lower load currents. On chip trimming adjusts the reference/output voltage to within 1%. Current limit is also trimmed in order to minimize the stress on both the regulator and the power source circuitry under overload conditions.The low profile surface mount SOT-223 package allows the device to be used in applications where space is limited. The LT1117 requires a minimum of 10mF of output capacitance for stability. Output capacitors of this size or larger are normally included in most regulator designs. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the LT1117 flows into the load, increasing efficiency.
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Packaging

DDPAK, SOT-223

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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1117CM DD PAK 3 C $2.58 $2.10 View
LT1117CM#PBF DD PAK 3 C $2.58 $2.10 View
LT1117CM#TR DD PAK 3 C   $2.23 View
LT1117CM#TRPBF DD PAK 2 C   $2.23 View
LT1117CM-2.85 DD PAK 3 C $2.58 $2.10 View
LT1117CM-2.85#PBF DD PAK 3 C $2.58 $2.10 View
LT1117CM-2.85#TR DD PAK 3 C   $2.22 View
LT1117CM-2.85#TRPBF DD PAK 3 C   $2.22 View
LT1117CM-3.3 DD PAK 3 C $2.58 $2.10 View
LT1117CM-3.3#PBF DD PAK 3 C $2.58 $2.10 View
LT1117CM-3.3#TR DD PAK 3 C   $2.23 View
LT1117CM-3.3#TRPBF DD PAK 3 C   $2.23 View
LT1117CM-5 DD PAK 3 C $2.58 $2.10 View
LT1117CM-5#PBF DD PAK 3 C $2.58 $2.10 View
LT1117CM-5#TR DD PAK 3 C   $2.23 View
LT1117CM-5#TRPBF DD PAK 3 C   $2.23 View
LT1117CST SOT 3 C $2.42 $1.90 View
LT1117CST#PBF SOT 4 C $2.42 $1.90 View
LT1117CST#TR SOT 4 C   $1.96 View
LT1117CST#TRPBF SOT 3 C   $1.96 View
LT1117CST-2.85 SOT 3 C $2.42 $1.90 View
LT1117CST-2.85#PBF SOT 3 C $2.42 $1.90 View
LT1117CST-2.85#TR SOT 3 C   $1.96 View
LT1117CST-2.85#TRPBF SOT 3 C   $1.96 View
LT1117CST-3.3 SOT 3 C $2.42 $1.90 View
LT1117CST-3.3#PBF SOT 3 C $2.42 $1.90 View
LT1117CST-3.3#TR SOT 3 C   $1.96 View
LT1117CST-3.3#TRPBF SOT 3 C   $1.96 View
LT1117CST-5 SOT 3 C $2.42 $1.90 View
LT1117CST-5#PBF SOT 3 C $2.42 $1.90 View
LT1117CST-5#TR SOT 3 C   $1.96 View
LT1117CST-5#TRPBF SOT 3 C   $1.96 View
LT1117IST SOT 3 I $2.52 $2.20 View
LT1117IST#PBF SOT 3 I $2.52 $2.20 View
LT1117IST#TR SOT 3 I   $2.26 View
LT1117IST#TRPBF SOT 3 I   $2.26 View
LT1117IST-2.85 SOT 3 I $2.52 $2.20 View
LT1117IST-2.85#PBF SOT 3 I $2.52 $2.20 View
LT1117IST-2.85#TR SOT 3 I   $2.26 View
LT1117IST-2.85#TRPBF SOT 3 I   $2.26 View
LT1117IST-3.3 SOT 3 I $2.52 $2.20 View
LT1117IST-3.3#PBF SOT 3 I $2.52 $2.20 View
LT1117IST-3.3#TR SOT 3 I   $2.26 View
LT1117IST-3.3#TRPBF SOT 3 I   $2.26 View
LT1117IST-5 SOT 3 I $2.52 $2.20 View
LT1117IST-5#PBF SOT 3 I $2.52 $2.20 View
LT1117IST-5#TR SOT 3 I   $2.26 View
LT1117IST-5#TRPBF SOT 3 I   $2.26 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

  • Active SCSI Terminators
  • High Efficiency Linear Regulators
  • Post Regulators for Switching Supplies
  • Battery Chargers
  • 5V to 3.3V Linear Regulators
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To simulate selected Linear Technology products, please download LTSpice / SwitcherCAD III. This powerful schematic capture and simulation tool includes macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

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