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LT1931ES5#TRPBF

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Analog Devices DC-DC Converters, TSOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Contents

README

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LT1931ES5#TRPBF

Analog Devices · DC-DC Converters · TSOT-23-5

LT1931ES5#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 SW output Switch pin: connect the inductor and Schottky diode here, and minimize the trace area at this pin to keep EMI down.
2 GND power_in Ground: tie directly to the local ground plane.
3 NFB input Feedback pin with a reference voltage of -1.255V: connect the resistive divider tap here and minimize trace area; the NFB bias current flows out of the pin.
4 SHDN input Shutdown pin: tie to 2.4V or more to enable the device and ground to shut it down; SHDN voltage is rated to 16V maximum.
5 VIN power_in Input supply pin that must be locally bypassed; the minimum operating voltage is 2.6V and the maximum operating voltage is 16V.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package TSOT-23-5
Category Power Management (PMIC)
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
Feedback Voltage -1.275 -1.255 -1.235 V 2
Feedback Voltage (full operating temperature range) -1.28 -1.23 V Over full operating temperature range (●) 2
Maximum Operating Voltage 16 V 2
Switching Frequency 1 1.2 1.4 MHz 2
Switching Frequency (full operating temperature range) 0.85 1.6 MHz Over full operating temperature range (●) 2
Maximum Duty Cycle 84 90 % Over full operating temperature range (●) 2
Switch Current Limit 1 1.2 2 A Note 3 2
Switch VCESAT 400 600 mV ISW = 1A 2
SHDN Input Voltage, High 2.4 V 2
SHDN Input Voltage, Low 0.5 V 2
Minimum Operating Voltage 2.45 2.6 V 2
NFB Pin Bias Current 4 8 µA VNFB = –1.255V; full operating temperature range (●) 2
Quiescent Current 4.2 6 mA VSHDN = 2.4V, Not Switching 2
Quiescent Current in Shutdown 0.01 1 µA VSHDN = 0V, VIN = 3V 2
Reference Line Regulation 0.01 0.05 %/V 2.6V ≤ VIN ≤ 16V 2
Switch Leakage Current 0.01 1 µA VSW = 5V 2
SHDN Pin Bias Current 16 32 µA VSHDN = 3V 2
SHDN Pin Bias Current 0 0.1 µA VSHDN = 0V 2
VIN Voltage VIN 16 V 2
SW Voltage SW -0.4 36 V 2
NFB Voltage NFB -2 V 2
Current Into NFB Pin -1 1 mA 2
SHDN Voltage SHDN 16 V 2
Maximum Junction Temperature TJ 125 °C 2
Operating Temperature Range TA -40 85 °C Note 2 2
Storage Temperature Range TSTG -65 150 °C 2
Lead Temperature (Soldering) 300 °C Soldering, 10 sec 2
Thermal Resistance, Junction to Ambient θJA 150 °C/W TJMAX = 125°C 2

CAD (KiCad official)

  • Symbol: LT1931ES5#TRPBF
  • Footprint: Package_TO_SOT_SMD:TSOT-23-5
  • 3D model: TSOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lt1931es5-trpbf-etched.step / lt1931es5-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt1931es5-trpbf.step / lt1931es5-trpbf.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (12 pp, sha256 86f1f10ba5e475b2, retrieved 2026-10-13, tier: lcsc)
  • 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