component
LT3971EMSE-5#PBF
Public Made by Adomby adom
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-5#PBF
Analog Devices · DC-DC Converters · MSOP-10-EP
LT3971EMSE-5#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 | input | Anode of the internal boost diode, normally connected to the output; boost diode current is limited to 1A and BD voltage to 30V. |
| 2 | BOOST | passive | Provides a drive voltage higher than the input voltage to the internal bipolar NPN power switch; absolute maximum 55V, and no more than 30V above SW. |
| 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 power switch, must be locally bypassed; input range 4.3V to 38V. |
| 5 | EN | input | Part is in shutdown when low and active when high, with a 1.005V rising and 0.975V falling threshold accurate only when VIN is above 4.3V; tie to VIN if shutdown is not used. |
| 6 | VOUT | input | The LT3971-5 regulates this pin to 5V; it connects to the internal 10MΩ feedback divider that programs the fixed output voltage. |
| 7 | SS | passive | Soft-start capacitor to ground ramps up the peak current limit on start-up; it is discharged only when EN is low, float to disable soft-start, and add a 100k series resistor for VIN above 25V. |
| 8 | RT | passive | A resistor from RT to ground sets the switching frequency (200kHz to 2MHz). |
| 9 | PG | output | Open-drain power good output from an internal comparator that stays low until the output is within 9% of final regulation, valid when enabled and VIN is above 4.3V. |
| 10 | SYNC | input | External clock synchronization input from 250kHz to 2MHz; ground for low ripple Burst Mode operation, while a clock source causes pulse-skipping with quiescent current rising to 1.5mA. |
| 11 | GND | power_in | Ground via the exposed pad (pin 11), which 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 |
|---|---|---|---|---|---|---|---|
| LT3971-5 Output Voltage (25°C) | VOUT | 4.93 | 5 | 5.07 | V | TA = 25°C | 3 |
| LT3971-5 Output Voltage (full temp range) | VOUT | 4.89 | 5 | 5.11 | V | over full operating temperature range | 3 |
| Minimum Input Voltage | VIN(MIN) | 4 | 4.3 | V | Note 4; full temp range | 3 | |
| Quiescent Current from VIN, VEN Low | IQ | 0.7 | µA | VEN Low | 3 | ||
| Quiescent Current from VIN, VEN High, VSYNC Low | IQ | 1.7 | µA | VEN High, VSYNC Low | 3 | ||
| Quiescent Current from VIN, VEN High, VSYNC Low (full temp) | IQ | 1.2 | 4.5 | µA | VEN High, VSYNC Low, full temp range | 3 | |
| Internal Feedback Resistor Divider | 10 | MΩ | LT3971-X | 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 | 0.02 | 1 | µA | 3 | |||
| Boost Schottky Forward Voltage | 770 | mV | ISH = 100mA | 3 | |||
| Boost Schottky Reverse Leakage | 0.02 | 1 | µA | VREVERSE = 12V | 3 | ||
| Minimum Boost Voltage | 1.4 | 1.8 | V | VIN = 5V (Note 3) | 3 | ||
| BOOST Pin Current | 20 | 28 | mA | ISW = 1A, VBOOST = 15V | 3 | ||
| EN Voltage Threshold | 0.95 | 1.01 | 1.07 | V | EN Rising | 3 | |
| EN Voltage Hysteresis | 30 | mV | 3 | ||||
| EN Pin Current | 0.2 | 20 | nA | 3 | |||
| LT3971-X PG Threshold Offset from VOUT | 5.5 | 9 | 12.5 | % | VOUT Rising | 3 | |
| LT3971-X PG Hysteresis | 1.3 | % | 3 | ||||
| PG Leakage | 0.02 | 1 | µA | VPG = 3V | 4 | ||
| PG Sink Current | 300 | 570 | µA | VPG = 0.4V | 4 | ||
| SYNC Threshold | 0.6 | 0.8 | 1 | V | 4 | ||
| SYNC Pin Current | 0.1 | nA | 4 | ||||
| SS Source Current | 0.6 | 1 | 1.6 | µA | VSS = 1V | 4 | |
| VIN, EN Voltage | 38 | V | 2 | ||||
| BOOST Pin Above SW Pin | 30 | V | 2 | ||||
| FB, VOUT, RT, SYNC, SS Voltage | 6 | V | 2 | ||||
| PG, BD Voltage | 30 | V | 2 | ||||
| Boost Diode Current | 1 | A | 2 | ||||
| Operating Junction Temperature Range (LT3971E) | -40 | 125 | °C | Note 2 | 2 | ||
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Thermal Resistance Junction to Ambient | θJA | 45 | °C | 10-lead MSE package | 2 | ||
| Thermal Resistance Junction to Case | θJC | 10 | °C/W | 10-lead MSE package | 2 |
CAD (KiCad official)
- Symbol:
LT3971EMSE-5#PBF - Footprint:
Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm - 3D model: MSOP-10-EP (KiCad packages3D, STEP)
- 3D model files:
lt3971emse-5-pbf-etched.step/lt3971emse-5-pbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt3971emse-5-pbf.step/lt3971emse-5-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 2026-10-31, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).
# LT3971EMSE-5#PBF
**Analog Devices** · DC-DC Converters · MSOP-10-EP
LT3971EMSE-5#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 | input | Anode of the internal boost diode, normally connected to the output; boost diode current is limited to 1A and BD voltage to 30V. |
| 2 | BOOST | passive | Provides a drive voltage higher than the input voltage to the internal bipolar NPN power switch; absolute maximum 55V, and no more than 30V above SW. |
| 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 power switch, must be locally bypassed; input range 4.3V to 38V. |
| 5 | EN | input | Part is in shutdown when low and active when high, with a 1.005V rising and 0.975V falling threshold accurate only when VIN is above 4.3V; tie to VIN if shutdown is not used. |
| 6 | VOUT | input | The LT3971-5 regulates this pin to 5V; it connects to the internal 10MΩ feedback divider that programs the fixed output voltage. |
| 7 | SS | passive | Soft-start capacitor to ground ramps up the peak current limit on start-up; it is discharged only when EN is low, float to disable soft-start, and add a 100k series resistor for VIN above 25V. |
| 8 | RT | passive | A resistor from RT to ground sets the switching frequency (200kHz to 2MHz). |
| 9 | PG | output | Open-drain power good output from an internal comparator that stays low until the output is within 9% of final regulation, valid when enabled and VIN is above 4.3V. |
| 10 | SYNC | input | External clock synchronization input from 250kHz to 2MHz; ground for low ripple Burst Mode operation, while a clock source causes pulse-skipping with quiescent current rising to 1.5mA. |
| 11 | GND | power_in | Ground via the exposed pad (pin 11), which 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 |
|---|---|---|---|---|---|---|---|
| LT3971-5 Output Voltage (25°C) | VOUT | 4.93 | 5 | 5.07 | V | TA = 25°C | 3 |
| LT3971-5 Output Voltage (full temp range) | VOUT | 4.89 | 5 | 5.11 | V | over full operating temperature range | 3 |
| Minimum Input Voltage | VIN(MIN) | | 4 | 4.3 | V | Note 4; full temp range | 3 |
| Quiescent Current from VIN, VEN Low | IQ | | 0.7 | | µA | VEN Low | 3 |
| Quiescent Current from VIN, VEN High, VSYNC Low | IQ | | 1.7 | | µA | VEN High, VSYNC Low | 3 |
| Quiescent Current from VIN, VEN High, VSYNC Low (full temp) | IQ | | 1.2 | 4.5 | µA | VEN High, VSYNC Low, full temp range | 3 |
| Internal Feedback Resistor Divider | | | 10 | | MΩ | LT3971-X | 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 | | | 0.02 | 1 | µA | | 3 |
| Boost Schottky Forward Voltage | | | 770 | | mV | ISH = 100mA | 3 |
| Boost Schottky Reverse Leakage | | | 0.02 | 1 | µA | VREVERSE = 12V | 3 |
| Minimum Boost Voltage | | | 1.4 | 1.8 | V | VIN = 5V (Note 3) | 3 |
| BOOST Pin Current | | | 20 | 28 | mA | ISW = 1A, VBOOST = 15V | 3 |
| EN Voltage Threshold | | 0.95 | 1.01 | 1.07 | V | EN Rising | 3 |
| EN Voltage Hysteresis | | | 30 | | mV | | 3 |
| EN Pin Current | | | 0.2 | 20 | nA | | 3 |
| LT3971-X PG Threshold Offset from VOUT | | 5.5 | 9 | 12.5 | % | VOUT Rising | 3 |
| LT3971-X PG Hysteresis | | | 1.3 | | % | | 3 |
| PG Leakage | | | 0.02 | 1 | µA | VPG = 3V | 4 |
| PG Sink Current | | 300 | 570 | | µA | VPG = 0.4V | 4 |
| SYNC Threshold | | 0.6 | 0.8 | 1 | V | | 4 |
| SYNC Pin Current | | | 0.1 | | nA | | 4 |
| SS Source Current | | 0.6 | 1 | 1.6 | µA | VSS = 1V | 4 |
| VIN, EN Voltage | | | | 38 | V | | 2 |
| BOOST Pin Above SW Pin | | | | 30 | V | | 2 |
| FB, VOUT, RT, SYNC, SS Voltage | | | | 6 | V | | 2 |
| PG, BD Voltage | | | | 30 | V | | 2 |
| Boost Diode Current | | | | 1 | A | | 2 |
| Operating Junction Temperature Range (LT3971E) | | -40 | | 125 | °C | Note 2 | 2 |
| Storage Temperature Range | | -65 | | 150 | °C | | 2 |
| Thermal Resistance Junction to Ambient | θJA | | 45 | | °C | 10-lead MSE package | 2 |
| Thermal Resistance Junction to Case | θJC | | 10 | | °C/W | 10-lead MSE package | 2 |
## CAD (KiCad official)
- Symbol: `LT3971EMSE-5#PBF`
- Footprint: `Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm`
- 3D model: MSOP-10-EP (KiCad packages3D, STEP)
- 3D model files: `lt3971emse-5-pbf-etched.step` / `lt3971emse-5-pbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt3971emse-5-pbf.step` / `lt3971emse-5-pbf.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/3971fd.pdf) (28 pp, sha256 `cf769206b11377dd`, retrieved 2026-10-31, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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](docs/lt3971emse-5-pbf-datasheet.pdf)