LT1761ES5-SD#TRMPBF Analog Devices Integrated Circuit (SOT23 (5-Pin)) In Stock
The LT1761ES5-SD#TRMPBF is a low-noise micropower adjustable LDO regulator delivering 100mA with only 0.3V typical dropout. Input-output differential spans 1.08V to 18.78V for versatile supply configurations. Available in SOT-23-5 package with worldwide stock and shipping.
- Manufacturer
- Analog Devices
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- LT1761ES5-SD#TRMPBF Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Ultra-low noise output ideal for sensitive analog and RF supply rails
- 100mA adjustable output with 0.3V typical dropout for near-rail-to-rail efficiency
- Wide input-output differential up to 18.78V supports a broad range of input supplies
- Micropower quiescent current extends battery life in portable instruments
Applications
The LT1761ES5-SD#TRMPBF is designed for portable test instruments, precision analog circuits, and RF front-end supply rails that require a clean, low-noise regulated voltage adjustable from 1.22V upward. Its micropower quiescent current and 0.3V dropout make it an excellent choice for lithium-ion battery-powered devices where efficiency and noise performance are equally critical. Medical monitoring equipment, audio ADC references, and cellular handset subsystems also benefit from this regulator's low spectral noise density.
Specifications
| Pbfree Code | No |
| Manufacturer Package Code | 05-08-1635 |
| YTEOL | 10 |
| Adjustability | ADJUSTABLE |
| Dropout Voltage1-Max | 0.45V |
| Dropout Voltage1-Nom | 0.3V |
| Input-Output Voltage Differential-Max | 18.78V |
| Input-Output Voltage Differential-Min | 1.08V |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e3 |
| Line Regulation-Max (%/V) | 0.046 |
| Load Regulation-Max(%) | 4.27% |
| Number of Functions | 1 |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.1A |
| Output Voltage1-Max | 20V |
| Output Voltage1-Min | 1.22V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, VERY THIN PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Regulator Type | ADJUSTABLE POSITIVE SINGLE OUTPUT LDO REGULATOR |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Matte Tin (Sn) - annealed |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How low is the output noise of the LT1761ES5-SD#TRMPBF, and why does that matter for precision ADC supply rails?
The LT1761ES5-SD#TRMPBF achieves a typical output noise spectral density of approximately 20 µV RMS over 10 Hz to 100 kHz, far below the noise floor of most 16-bit or 18-bit SAR ADCs. Feeding an ADC reference or analog supply with this LDO prevents noise from degrading effective number of bits (ENOB), maintaining full 16-bit resolution at 100 mA load current while operating from input rails up to 20 V.
What output voltage range can the LT1761ES5-SD#TRMPBF be configured for using external resistors?
As an adjustable LDO, the LT1761ES5-SD#TRMPBF regulates output voltage from its 1.22 V internal reference upward, set by a resistor divider from VOUT to ADJ and ADJ to GND. The maximum input-output differential of 18.78 V allows outputs up to approximately 19 V from a 20 V input, while the 1.08 V minimum differential ensures it regulates tightly at 100 mA with a dropout of only 0.3 V typical.
For a portable RF signal generator requiring a quiet 3.3V at 100mA, how does the LT1761ES5-SD#TRMPBF compare to a standard LDO?
Standard LDOs such as the LP2985 have output noise of 50 µV to 100 µV RMS, while the LT1761ES5-SD#TRMPBF achieves approximately 20 µV RMS—2x to 5x quieter. At 100 mA and 3.3 V output from a 3.6 V Li-ion cell, it maintains regulation with only 0.3 V dropout versus 0.5 V to 0.7 V for many competing parts, recovering roughly 20 mW of efficiency in handheld RF equipment.
How does the SOT-23-5 package of the LT1761ES5-SD#TRMPBF limit the number of external components needed?
The SOT-23-5 package integrates the reference, error amplifier, and pass transistor into a 2.9 mm × 1.6 mm body, requiring only 2 resistors for output voltage setting and 1 µF input and output capacitors—4 to 5 passive components total. This minimal external count and compact 5-pin SOT-23 footprint suit space-critical PCB areas in smartphones, wearables, and portable instruments where board area costs are high.
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