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LT3971IMSE#PBF
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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.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLT3971IMSE#PBF
Analog Devices · DC-DC Converters · MSOP-10-EP
LT3971IMSE#PBF 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 | Connects to the anode of the boost diode and is normally connected to the output. |
| 2 | BOOST | passive | Provides a drive voltage, higher than the input voltage, to the internal bipolar NPN power switch. |
| 3 | SW | output | Output of the internal power switch; connect to the inductor, catch diode, and boost capacitor. |
| 4 | VIN | power_in | Supplies current to the internal circuitry and internal power switch, must be locally bypassed, and the input range is 4.3V to 38V. |
| 5 | EN | input | Part is in shutdown when low and active when high; the hysteretic threshold is 1.005V rising and 0.975V falling, and it is accurate only when VIN is above 4.3V. |
| 6 | FB | input | The LT3971 regulates FB to 1.19V; connect the feedback resistor divider tap here and a phase lead capacitor (typically 10pF) between FB and VOUT. |
| 7 | SS | passive | A capacitor tied to ground slowly ramps up the peak current limit at start-up; a 100k resistor in series is required for VIN above 25V. |
| 8 | RT | passive | A resistor tied between RT and ground sets the switching frequency. |
| 9 | PG | output | Open-drain output of an internal comparator that remains low until FB is within 9% of the final regulation voltage. |
| 10 | SYNC | input | External clock synchronization input; ground this pin for low-ripple Burst Mode operation at low output loads. |
| 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 |
|---|---|---|---|---|---|---|---|
| Feedback Voltage | VFB | 1.175 | 1.19 | 1.205 | V | 3 | |
| Feedback Voltage over operating temperature range | VFB | 1.165 | 1.19 | 1.215 | V | l: full operating temperature range | 3 |
| Minimum Input Voltage | VIN(MIN) | 4 | 4.3 | V | Note 4 | 3 | |
| Quiescent Current from VIN, VEN low | IQ | 0.7 | 1.2 | μA | VEN Low | 3 | |
| Quiescent Current from VIN, VEN high, VSYNC low | IQ | 1.7 | 2.7 | μA | VEN High, VSYNC Low | 3 | |
| Quiescent Current from VIN, VEN high, VSYNC low over temperature | IQ | 4.5 | μA | VEN High, VSYNC Low, l: full operating temperature range | 3 | ||
| FB Pin Current | IFB | 0.1 | 12 | nA | VFB = 1.19V, l: full operating temperature range | 3 | |
| FB Voltage Line Regulation | 0.0002 | 0.01 | %/V | 4.3V < VIN < 38V (Note 4) | 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(LEAK) | 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 | VBOOST(MIN) | 1.4 | 1.8 | V | VIN = 5V, l: full operating temperature range (Note 3) | 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, l: full operating temperature range | 3 |
| EN Voltage Hysteresis | 30 | mV | 3 | ||||
| EN Pin Current | IEN | 0.2 | 20 | nA | 3 | ||
| PG Threshold Offset from VFB | VPG | 60 | 100 | 140 | mV | VFB Rising | 3 |
| PG Hysteresis | 20 | mV | 3 | ||||
| PG Leakage | IPG(LEAK) | 0.02 | 1 | μA | VPG = 3V | 4 | |
| PG Sink Current | IPG | 300 | 570 | μA | VPG = 0.4V, l: 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 |
| Absolute maximum VIN and EN voltage | VIN, VEN | 38 | V | 2 | |||
| Absolute maximum BOOST pin above SW pin | VBOOST-SW | 30 | V | 2 | |||
| Absolute maximum FB, VOUT, RT, SYNC, SS voltage | VFB, VOUT, VRT, VSYNC, VSS | 6 | V | 2 | |||
| Absolute maximum PG and BD voltage | VPG, VBD | 30 | V | 2 | |||
| Absolute maximum boost diode current | IBD | 1 | A | 2 | |||
| Operating junction temperature range | TJ | -40 | 125 | °C | LT3971E and LT3971I (Note 2) | 2 | |
| Storage temperature range | TSTG | -65 | 150 | °C | 2 | ||
| Thermal resistance junction to ambient | θJA | 45 | °C/W | MSE 10-lead package | 2 | ||
| Thermal resistance junction to case | θJC | 10 | °C/W | MSE 10-lead package | 2 |
CAD (KiCad official)
- Symbol:
LT3971IMSE#PBF - Footprint:
Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm - 3D model: MSOP-10-EP (KiCad packages3D, STEP)
- 3D model files:
lt3971imse-pbf-etched.step/lt3971imse-pbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt3971imse-pbf.step/lt3971imse-pbf.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).