LT1761 - 100mA, Low Noise, LDO Micropower Regulators in TSOT-23

Features

  • Low Noise: 20μVRMS (10Hz to 100kHz)
  • Low Quiescent Current: 20μA
  • Wide Input Voltage Range: 1.8V to 20V
  • Output Current: 100mA
  • Very Low Shutdown Current: <0.1μA
  • Low Dropout Voltage: 300mV at 100mA
  • Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V, 5V
  • Adjustable Output from 1.22V to 20V
  • Stable with 1μF Output Capacitor
  • Stable with Aluminum, Tantalum or Ceramic Capacitors
  • Reverse-Battery Protected
  • No Reverse Current
  • No Protection Diodes Needed
  • Overcurrent and Overtemperature Protected
  • Available in Tiny 5-Lead TSOT-23 Package

Typical Application

LT1761 Typical Application
LT1761 Typical Application

Description

The LT®1761 series are micropower, low noise, low dropout regulators. With an external 0.01μF bypass capacitor, output noise drops to 20μVRMS over a 10Hz to 100kHz bandwidth. Designed for use in battery-powered systems, the low 20μA quiescent current makes them an ideal choice. In shutdown, quiescent current drops to less than 0.1μA. The devices are capable of operating over an input voltage from 1.8V to 20V, and can supply 100mA of output current with a dropout voltage of 300mV. Quiescent current is well controlled, not rising in dropout as it does with many other regulators.

The LT1761 regulators are stable with output capacitors as low as 1μF. Small ceramic capacitors can be used without the series resistance required by other regulators.

Internal protection circuitry includes reverse battery protection, current limiting, thermal limiting and reverse current protection. The device is available in fixed output voltages of 1.2V, 1.5V, 1.8V, 2V, 2.5V, 2.8V, 3V, 3.3V and 5V, and as an adjustable device with a 1.22V reference voltage. The LT1761 regulators are available in the 5-lead TSOT-23 package.

Packaging

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

SOT-23

LT1761 Package Drawing
LT1761 Package Drawing
LT1761 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT1761ES5-1.2 SOT 5 E $1.21 View
LT1761ES5-1.2#PBF SOT 5 E $1.21 View
LT1761ES5-1.2#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-1.2#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-1.2#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-1.5 SOT 5 E $1.21 View
LT1761ES5-1.5#PBF SOT 5 E $1.21 View
LT1761ES5-1.5#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-1.5#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-1.5#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-1.5#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-1.8#PBF SOT 5 E $1.21 View
LT1761ES5-1.8#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-1.8#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-1.8#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-1.8#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-2 SOT 5 E $1.21 View
LT1761ES5-2#PBF SOT 5 E $1.21 View
LT1761ES5-2#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-2#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-2#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-2#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-2.5 SOT 5 E $1.21 View
LT1761ES5-2.5#PBF SOT 5 E $1.21 View
LT1761ES5-2.5#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-2.5#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-2.5#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-2.5#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-2.8 SOT 5 E $1.21 View
LT1761ES5-2.8#PBF SOT 5 E $1.21 View
LT1761ES5-2.8#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-2.8#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-2.8#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-2.8#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-3 SOT 5 E $1.21 View
LT1761ES5-3#PBF SOT 5 E $1.21 View
LT1761ES5-3#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-3#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-3#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-3#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-3.3 SOT 5 E $1.21 View
LT1761ES5-3.3#PBF SOT 5 E $1.21 View
LT1761ES5-3.3#TR SOT 5 E $1.21 $0.95 View
LT1761ES5-3.3#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-3.3#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-3.3#TRPBF SOT 5 E $1.21 $0.95 View
LT1761ES5-5 SOT 5 E $1.10 View
LT1761ES5-5#PBF SOT 5 E $1.10 View
LT1761ES5-5#TR SOT 5 E $1.10 $0.95 View
LT1761ES5-5#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-5#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-5#TRPBF SOT 5 E $1.10 $0.95 View
LT1761ES5-BYP SOT 5 E $1.10 View
LT1761ES5-BYP#PBF SOT 5 E $1.10 View
LT1761ES5-BYP#TR SOT 5 E $1.10 $0.95 View
LT1761ES5-BYP#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-BYP#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-BYP#TRPBF SOT 5 E $1.10 $0.95 View
LT1761ES5-SD SOT 5 E $1.10 View
LT1761ES5-SD#PBF SOT 5 E $1.10 View
LT1761ES5-SD#TR SOT 5 E $1.10 $0.95 View
LT1761ES5-SD#TRM SOT 5 E $1.21 $0.97 View
LT1761ES5-SD#TRMPBF SOT 5 E $1.21 $0.97 View
LT1761ES5-SD#TRPBF SOT 5 E $1.10 $0.95 View
LT1761IS5-1.2#PBF SOT 5 I $1.50 View
LT1761IS5-1.2#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-1.2#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-1.5#PBF SOT 5 I $1.50 View
LT1761IS5-1.5#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-1.5#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-1.8#PBF SOT 5 I $1.50 View
LT1761IS5-1.8#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-1.8#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-2.0#PBF SOT 5 I $1.50 View
LT1761IS5-2.0#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-2.0#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-2.5#PBF SOT 5 I $1.50 View
LT1761IS5-2.5#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-2.5#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-2.8#PBF SOT 5 I $1.50 View
LT1761IS5-2.8#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-2.8#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-3#PBF SOT 5 I $1.50 View
LT1761IS5-3#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-3#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-3.3#PBF SOT 5 I $1.50 View
LT1761IS5-3.3#TRM SOT 5 I View
LT1761IS5-3.3#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-3.3#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-5#PBF SOT 5 I $1.50 View
LT1761IS5-5#TRM SOT 5 I View
LT1761IS5-5#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-5#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-BYP#PBF SOT 5 I $1.50 View
LT1761IS5-BYP#TRM SOT 5 I View
LT1761IS5-BYP#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-BYP#TRPBF SOT 5 I $1.50 $1.05 View
LT1761IS5-SD#PBF SOT 5 I $1.50 View
LT1761IS5-SD#TRMPBF SOT 5 I $1.50 $1.10 View
LT1761IS5-SD#TRPBF SOT 5 I $1.50 $1.05 View
LT1761MPS5-1.8#TRMPBF SOT 5 MP $2.51 $1.81 View
LT1761MPS5-1.8#TRPBF SOT 5 MP $2.51 $1.76 View
LT1761MPS5-3#TRMPBF SOT 5 MP $2.51 $1.81 View
LT1761MPS5-3.3#PBF SOT 5 MP $2.51 View
LT1761MPS5-3.3#TRMPBF SOT 5 MP $2.51 $1.81 View
LT1761MPS5-3.3#TRPBF SOT 5 MP $2.51 $1.76 View
LT1761MPS5-5#PBF SOT 5 MP $2.51 View
LT1761MPS5-5#TR SOT 5 MP $2.51 $1.76 View
LT1761MPS5-5#TRMPBF SOT 5 MP $2.51 $1.81 View
LT1761MPS5-5#TRPBF SOT 5 MP $2.51 $1.76 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.

Part Number Description Price Documentation
DC330A LT1761ES5-BYP/SD Demo Board | 2 Circuits: Low Output Noise and Low Current Shutdown, 2.3V ≤ VIN ≤ 20V, Vout = 1.22/1.8/2.0/2.5/2.8/3.0/3.3/5.0V @ 100mA. $75.00
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Applications

  • Cellular Phones
  • Pagers
  • Battery-Powered Systems
  • Frequency Synthesizers
  • Wireless Modems

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Design Tools

LTspiceIV

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Models for the following parts are available in LTspice IV:
LT1761-1.2
LT1761-1.5
LT1761-1.8
LT1761-2
LT1761-2.5
LT1761-2.8
LT1761-3
LT1761-3.3
LT1761-5
LT1761-BYP
LT1761-SD

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