Power Management LDO Linear Regulators Positive Linear Regulators (LDO)
Power Management LDO Linear Regulators Extended Temperature (H & MP) Linear Regulators

LT1762 - 150mA, Low Noise, LDO Micropower Regulators

LTC4365 - Overvoltage, Undervoltage and Reverse Supply Protection Controller

LTC4417 - Prioritized PowerPath Controller

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
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages

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

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
LT1761ES5-1.2#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.2#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.2#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.5#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.5#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.5#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.8#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.8#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-1.8#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2.5#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2.5#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2.5#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2.8#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2.8#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2.8#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-2#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-3.3#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-3.3#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-3.3#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-3#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-3#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-3#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-5#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-5#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-5#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-BYP#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-BYP#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-BYP#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-SD#PBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-SD#TRMPBF SOT-23 S5 E 05-08-1635 Yes
LT1761ES5-SD#TRPBF SOT-23 S5 E 05-08-1635 Yes
LT1761IS5-1.2#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.2#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.2#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.5#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.5#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.5#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.8#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.8#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-1.8#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2.5#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2.5#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2.5#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2.8#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2.8#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2.8#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-2#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-3.3#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-3.3#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-3.3#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-3#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-3#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-3#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-5#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-5#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-5#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-BYP#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-BYP#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-BYP#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-SD#PBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-SD#TRMPBF SOT-23 S5 I 05-08-1635 Yes
LT1761IS5-SD#TRPBF SOT-23 S5 I 05-08-1635 Yes
LT1761MPS5-1.8#TRMPBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-1.8#TRPBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-3.3 SOT-23 S5 MP 05-08-1635 No
LT1761MPS5-3.3#PBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-3.3#TR SOT-23 S5 MP 05-08-1635 No
LT1761MPS5-3.3#TRM SOT-23 S5 MP 05-08-1635 No
LT1761MPS5-3.3#TRMPBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-3.3#TRPBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-5#PBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-5#TR SOT-23 S5 MP 05-08-1635 No
LT1761MPS5-5#TRM SOT-23 S5 MP 05-08-1635 No
LT1761MPS5-5#TRMPBF SOT-23 S5 MP 05-08-1635 Yes
LT1761MPS5-5#TRPBF SOT-23 S5 MP 05-08-1635 Yes


LT1761 Package Drawing
LT1761 Package Drawing
LT1761 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
LT1761ES5-1.2#PBF SOT-23 E $1.21 Yes
LT1761ES5-1.2#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-1.2#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-1.5#PBF SOT-23 E $1.21 Yes
LT1761ES5-1.5#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-1.5#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-1.8#PBF SOT-23 E $1.21 Yes
LT1761ES5-1.8#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-1.8#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-2.5#PBF SOT-23 E $1.21 Yes
LT1761ES5-2.5#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-2.5#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-2.8#PBF SOT-23 E $1.21 Yes
LT1761ES5-2.8#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-2.8#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-2#PBF SOT-23 E $1.21 Yes
LT1761ES5-2#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-2#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-3.3#PBF SOT-23 E $1.21 Yes
LT1761ES5-3.3#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-3.3#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-3#PBF SOT-23 E $1.21 Yes
LT1761ES5-3#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-3#TRPBF SOT-23 E $1.21 $0.95 Yes
LT1761ES5-5#PBF SOT-23 E $1.10 Yes
LT1761ES5-5#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-5#TRPBF SOT-23 E $1.10 $0.95 Yes
LT1761ES5-BYP#PBF SOT-23 E $1.10 Yes
LT1761ES5-BYP#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-BYP#TRPBF SOT-23 E $1.10 $0.95 Yes
LT1761ES5-SD#PBF SOT-23 E $1.10 Yes
LT1761ES5-SD#TRMPBF SOT-23 E $1.21 $0.97 Yes
LT1761ES5-SD#TRPBF SOT-23 E $1.10 $0.95 Yes
LT1761IS5-1.2#PBF SOT-23 I $1.50 Yes
LT1761IS5-1.2#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-1.2#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-1.5#PBF SOT-23 I $1.50 Yes
LT1761IS5-1.5#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-1.5#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-1.8#PBF SOT-23 I $1.50 Yes
LT1761IS5-1.8#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-1.8#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-2.5#PBF SOT-23 I $1.50 Yes
LT1761IS5-2.5#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-2.5#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-2.8#PBF SOT-23 I $1.50 Yes
LT1761IS5-2.8#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-2.8#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-2#PBF SOT-23 I $1.50 Yes
LT1761IS5-2#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-2#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-3.3#PBF SOT-23 I $1.50 Yes
LT1761IS5-3.3#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-3.3#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-3#PBF SOT-23 I $1.50 Yes
LT1761IS5-3#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-3#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-5#PBF SOT-23 I $1.50 Yes
LT1761IS5-5#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-5#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-BYP#PBF SOT-23 I $1.50 Yes
LT1761IS5-BYP#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-BYP#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-SD#PBF SOT-23 I $1.50 Yes
LT1761IS5-SD#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-SD#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761MPS5-1.8#TRMPBF SOT-23 MP $2.51 $1.81 Yes
LT1761MPS5-1.8#TRPBF SOT-23 MP $2.51 $1.76 Yes
LT1761MPS5-3.3 SOT-23 MP $2.51 No
LT1761MPS5-3.3#PBF SOT-23 MP $2.51 Yes
LT1761MPS5-3.3#TR SOT-23 MP $2.51 $1.76 No
LT1761MPS5-3.3#TRM SOT-23 MP $2.51 $1.81 No
LT1761MPS5-3.3#TRMPBF SOT-23 MP $2.51 $1.81 Yes
LT1761MPS5-3.3#TRPBF SOT-23 MP $2.51 $1.76 Yes
LT1761MPS5-5#PBF SOT-23 MP $2.51 Yes
LT1761MPS5-5#TR SOT-23 MP $2.51 $1.76 No
LT1761MPS5-5#TRM SOT-23 MP $2.51 $1.81 No
LT1761MPS5-5#TRMPBF SOT-23 MP $2.51 $1.81 Yes
LT1761MPS5-5#TRPBF SOT-23 MP $2.51 $1.76 Yes
Buy Now • Request Samples
* 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
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LT1761IS5-1.2#PBF SOT-23 I $1.50 Yes
LT1761IS5-1.2#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-1.2#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-1.5#PBF SOT-23 I $1.50 Yes
LT1761IS5-1.5#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-1.5#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-1.8#PBF SOT-23 I $1.50 Yes
LT1761IS5-1.8#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-1.8#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-2.5#PBF SOT-23 I $1.50 Yes
LT1761IS5-2.5#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-2.5#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-2.8#PBF SOT-23 I $1.50 Yes
LT1761IS5-2.8#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-2.8#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-2#PBF SOT-23 I $1.50 Yes
LT1761IS5-2#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-2#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-3.3#PBF SOT-23 I $1.50 Yes
LT1761IS5-3.3#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-3.3#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-3#PBF SOT-23 I $1.50 Yes
LT1761IS5-3#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-3#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-5#PBF SOT-23 I $1.50 Yes
LT1761IS5-5#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-5#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-BYP#PBF SOT-23 I $1.50 Yes
LT1761IS5-BYP#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-BYP#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761IS5-SD#PBF SOT-23 I $1.50 Yes
LT1761IS5-SD#TRMPBF SOT-23 I $1.50 $1.10 Yes
LT1761IS5-SD#TRPBF SOT-23 I $1.50 $1.05 Yes
LT1761MPS5-1.8#TRMPBF SOT-23 MP $2.51 $1.81 Yes
LT1761MPS5-1.8#TRPBF SOT-23 MP $2.51 $1.76 Yes
LT1761MPS5-3.3#PBF SOT-23 MP $2.51 Yes
LT1761MPS5-3.3#TRMPBF SOT-23 MP $2.51 $1.81 Yes
LT1761MPS5-3.3#TRPBF SOT-23 MP $2.51 $1.76 Yes
LT1761MPS5-5#PBF SOT-23 MP $2.51 Yes
LT1761MPS5-5#TRMPBF SOT-23 MP $2.51 $1.81 Yes
LT1761MPS5-5#TRPBF SOT-23 MP $2.51 $1.76 Yes
Buy Now • Request Samples
* 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.

Applications

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

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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:

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  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
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Models for the following parts are available in LTspice:
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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