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LT3971EMSE#TRPBF

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Analog Devices DC-DC Converters, MSOP-10-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LT3971EMSE#TRPBF

Analog Devices · DC-DC Converters · MSOP-10-EP

LT3971EMSE#TRPBF from Analog Devices, in a MSOP-10-EP. 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 BD passive Anode of the boost diode, normally connected to the output, with BD voltage rated to 30V and boost diode current rated to 1A.
2 BOOST power_in Provides a drive voltage higher than VIN to the internal NPN power switch, with BOOST pin voltage rated to 55V and no more than 30V above the SW pin.
3 SW output Output of the internal power switch, connected to the inductor, catch diode and boost capacitor.
4 VIN power_in Supplies the internal circuitry and power switch over the 4.3V to 38V input range and must be locally bypassed.
5 EN input Enable pin with a 1V threshold (1.005V rising, 0.975V falling) that shuts the part down when low; the threshold is accurate only when VIN is above 4.3V, and it is rated to 38V.
6 FB input Regulates to 1.19V, with the feedback resistor divider tap connected here and a phase-lead capacitor (typically 10pF) connected between FB and VOUT.
7 SS passive Soft-start capacitor pin that slowly ramps the peak current limit at start-up; a 100k series resistor is required for VIN above 25V, and the pin is rated to 6V.
8 RT passive A resistor tied to ground sets the switching frequency over the 200kHz to 2MHz range, and the pin is rated to 6V.
9 PG output Open-drain power good output that stays low until FB is within 9% of the final regulation voltage, with PG voltage rated to 30V.
10 SYNC input External clock synchronization input; grounding it selects low-ripple Burst Mode operation at low loads, and the pin is rated to 6V.
11 GND power_in Ground exposed pad that must be soldered to the PCB.

Key specifications

Parameter Value
Manufacturer Analog Devices
Package MSOP-10-EP
Category Power Management ICs
Pins 11

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 4 4.3 V Note 4 3
Quiescent Current from VIN IQ 0.7 1.2 μA VEN Low 3
Quiescent Current from VIN IQ 1.7 2.7 μA VEN High, VSYNC Low 3
Quiescent Current from VIN IQ 4.5 μA VEN High, VSYNC Low, over full operating temperature range 3
LT3971 FB Pin Current IFB 0.1 12 nA VFB = 1.19V 3
Feedback Voltage VFB 1.175 1.19 1.205 V 3
Feedback Voltage VFB 1.165 1.19 1.215 V over full operating temperature range 3
Switching Frequency fSW 1.6 2 2.4 MHz RT = 11k 3
Switching Frequency fSW 0.8 1 1.2 MHz RT = 35.7k 3
Switching Frequency fSW 160 200 240 kHz RT = 255k 3
Minimum Switch On Time tON(MIN) 80 ns 3
Minimum Switch Off Time tOFF(MIN) 110 150 ns 3
Switch Current Limit ILIM 1.8 2.4 3 A 3
Switch VCESAT VCESAT 330 mV ISW = 1A 3
Switch Leakage Current ISW 0.02 1 μA 3
Boost Schottky Forward Voltage VF 770 mV ISH = 100mA 3
Boost Schottky Reverse Leakage IR 0.02 1 μA VREVERSE = 12V 3
Minimum Boost Voltage 1.4 1.8 V VIN = 5V, over full operating temperature range 3
BOOST Pin Current IBOOST 20 28 mA ISW = 1A, VBOOST = 15V 3
EN Voltage Threshold VEN 0.95 1.01 1.07 V EN Rising, over full operating temperature range 3
EN Voltage Hysteresis 30 mV 3
EN Pin Current IEN 0.2 20 nA 3
LT3971 PG Threshold Offset from VFB 60 100 140 mV VFB Rising 3
LT3971 PG Hysteresis 20 mV 3
PG Leakage IPG 0.02 1 µA VPG = 3V 4
PG Sink Current IPG 300 570 μA VPG = 0.4V, over full operating temperature range 4
SYNC Threshold VSYNC 0.6 0.8 1 V 4
SYNC Pin Current ISYNC 0.1 nA 4
SS Source Current ISS 0.6 1 1.6 μA VSS = 1V 4
VIN and EN Voltage 38 V Absolute Maximum Ratings 2
BOOST Pin Above SW Pin 30 V Absolute Maximum Ratings 2
FB, VOUT, RT, SYNC, SS Voltage 6 V Absolute Maximum Ratings 2
PG, BD Voltage 30 V Absolute Maximum Ratings 2
Boost Diode Current 1 A Absolute Maximum Ratings 2
Operating Junction Temperature Range TJ -40 125 °C LT3971E 2
Storage Temperature Range TSTG -65 150 °C Absolute Maximum Ratings 2
Thermal Resistance Junction to Ambient θJA 45 °C/W MSE 10-lead MSOP 2
Thermal Resistance Junction to Case θJC 10 °C/W MSE 10-lead MSOP 2

CAD (KiCad official)

  • Symbol: LT3971EMSE#TRPBF
  • Footprint: Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm
  • 3D model: MSOP-10-EP (KiCad packages3D, STEP)
  • 3D model files: lt3971emse-trpbf-etched.step / lt3971emse-trpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt3971emse-trpbf.step / lt3971emse-trpbf.glb are the bare package body.

Provenance

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

  • Datasheet: Analog Devices datasheet (28 pp, sha256 cf769206b11377dd, retrieved 2026-10-28, 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