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LT1761IS5-3.3#TRPBF

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Analog Devices Linear Voltage Regulators (LDO), TSOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LT1761IS5-3.3#TRPBF

Analog Devices · Linear Voltage Regulators (LDO) · TSOT-23-5

LT1761IS5-3.3#TRPBF from Analog Devices, in a TSOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 IN power_in Input supply pin; the device withstands reverse voltage on IN relative to GND and OUT, with an absolute maximum IN pin voltage of ±20V and a minimum input voltage of 1.8V at 100mA load, and a bypass capacitor of 1µF to 10µF is sufficient if the device is far from the input filter capacitor.
2 GND power_in Ground reference pin for the regulator.
3 SHDN input Shutdown input that turns the output off when pulled low, can be driven by 5V logic or an open-collector gate with a pull-up resistor, must be connected to VIN if unused, and has an absolute maximum voltage of ±20V.
4 BYP passive Bypass pin clamped internally to ±0.6V from ground that accepts a capacitor from OUT of up to 0.01µF to lower output noise to a typical 20µVRMS, and must be left unconnected if not used.
5 OUT power_out Regulated output that supplies the load and requires a minimum 1µF output capacitor to prevent oscillations, with larger capacitors needed for large transient loads.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package TSOT-23-5
Category Power Management ICs
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Minimum Input Voltage 1.8 2.3 V ILOAD = 100mA; l = full operating temperature range 4
Regulated Output Voltage (LT1761-3.3) 3.25 3.3 3.35 V VIN = 3.8V, ILOAD = 1mA 4
Regulated Output Voltage (LT1761-3.3) 3.23 3.3 3.37 V 4.3V < VIN < 20V, 1mA < ILOAD < 50mA; l = full operating temperature range 4
Regulated Output Voltage (LT1761-3.3) 3.19 3.3 3.4 V 4.3V < VIN < 20V, 1mA < ILOAD < 100mA; l = full operating temperature range 4
Line Regulation (LT1761-3.3) 1 10 mV ΔVIN = 3.8V to 20V, ILOAD = 1mA; l = full operating temperature range 4
Load Regulation (LT1761-3.3) 10 20 mV VIN = 4.3V, ΔILOAD = 1mA to 50mA 5
Load Regulation (LT1761-3.3) 40 mV VIN = 4.3V, ΔILOAD = 1mA to 50mA; l = full operating temperature range 5
Load Regulation (LT1761-3.3) 20 40 mV VIN = 4.3V, ΔILOAD = 1mA to 100mA 5
Load Regulation (LT1761-3.3) 100 mV VIN = 4.3V, ΔILOAD = 1mA to 100mA; l = full operating temperature range 5
Dropout Voltage 0.1 0.15 V VIN = VOUT(NOMINAL), ILOAD = 1mA 5
Dropout Voltage 0.19 V VIN = VOUT(NOMINAL), ILOAD = 1mA; l = full operating temperature range 5
Dropout Voltage 0.17 0.22 V VIN = VOUT(NOMINAL), ILOAD = 10mA 5
Dropout Voltage 0.29 V VIN = VOUT(NOMINAL), ILOAD = 10mA; l = full operating temperature range 5
Dropout Voltage 0.24 0.28 V VIN = VOUT(NOMINAL), ILOAD = 50mA 5
Dropout Voltage 0.38 V VIN = VOUT(NOMINAL), ILOAD = 50mA; l = full operating temperature range 5
Dropout Voltage 0.3 0.35 V VIN = VOUT(NOMINAL), ILOAD = 100mA 5
Dropout Voltage 0.45 V VIN = VOUT(NOMINAL), ILOAD = 100mA 5
GND Pin Current 20 45 μA VIN = VOUT(NOMINAL), ILOAD = 0mA; l = full operating temperature range 6
GND Pin Current 55 100 μA VIN = VOUT(NOMINAL), ILOAD = 1mA; l = full operating temperature range 6
GND Pin Current 230 400 μA VIN = VOUT(NOMINAL), ILOAD = 10mA; l = full operating temperature range 6
GND Pin Current 1 2 mA VIN = VOUT(NOMINAL), ILOAD = 50mA; l = full operating temperature range 6
GND Pin Current 2.2 4 mA VIN = VOUT(NOMINAL), ILOAD = 100mA; l = full operating temperature range 6
Quiescent Current in Shutdown 0.01 0.1 μA VIN = 6V, VSHDN = 0V 6
SHDN Pin Current 0 1 μA VSHDN = 0V; l = full operating temperature range 6
SHDN Pin Current 0.5 3 μA VSHDN = 20V; l = full operating temperature range 6
Shutdown Threshold 0.8 2 V VOUT = Off to On 6
Shutdown Threshold 0.25 0.65 V VOUT = On to Off 6
Ripple Rejection 55 65 dB VIN, VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 50mA 6
Current Limit 200 mA VIN = 7V, VOUT = 0V 6
Current Limit 110 mA VIN = VOUT(NOMINAL) + 1V or 2.3V (Note 12), ΔVOUT = -5%; l = full operating temperature range 6
Input Reverse Leakage Current 1 mA VIN = -20V, VOUT = 0V; l = full operating temperature range 6
Reverse Output Current (LT1761-3.3) 10 20 μA VOUT = 3.3V, VIN < 3.3V 6
IN Pin Voltage -20 20 V 2
OUT Pin Voltage -20 20 V 2
Input to Output Differential Voltage -20 20 V 2
SHDN Pin Voltage -20 20 V 2
Operating Junction Temperature Range (I grade) -40 125 °C I grade (LT1761IS5), Note 2 2
Storage Temperature Range -65 150 °C 2
Lead Temperature (Soldering, 10 sec) 300 °C Soldering, 10 sec 2
Maximum Junction Temperature (TJMAX) TJMAX 150 °C S5 package pinout note; the thermal section gives 125°C max rated junction temperature 2
Thermal Resistance, Junction-to-Ambient (S5 package) θJA 250 °C/W S5 (5-lead plastic TSOT-23) package, as stated in pinout note 2
Measured Thermal Resistance, Junction-to-Ambient θJA 125 °C/W Topside copper 2500mm², backside copper 2500mm², board area 2500mm²; 3/32in FR-4, 1oz copper, still air 17
Measured Thermal Resistance, Junction-to-Ambient θJA 130 °C/W Topside copper 225mm², backside copper 2500mm², board area 2500mm²; 3/32in FR-4, 1oz copper, still air 17
Measured Thermal Resistance, Junction-to-Ambient θJA 135 °C/W Topside copper 100mm², backside copper 2500mm², board area 2500mm²; 3/32in FR-4, 1oz copper, still air 17
Measured Thermal Resistance, Junction-to-Ambient θJA 150 °C/W Topside copper 50mm², backside copper 2500mm², board area 2500mm²; 3/32in FR-4, 1oz copper, still air 17

CAD (KiCad official)

  • Symbol: LT1761IS5-3.3#TRPBF
  • Footprint: Package_TO_SOT_SMD:TSOT-23-5
  • 3D model: TSOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lt1761is5-3-3-trpbf-etched.step / lt1761is5-3-3-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt1761is5-3-3-trpbf.step / lt1761is5-3-3-trpbf.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Analog Devices datasheet (22 pp, sha256 5e4fc36c022415d2, retrieved 2026-10-29, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF