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LT3990EMSE-3.3#PBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, MSOP-16-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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LT3990EMSE-3.3#PBF
Analog Devices · DC-DC Converters · MSOP-16-EP
LT3990EMSE-3.3#PBF from Analog Devices, in a MSOP-16-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 | VOUT | input | Regulated to 3.3V for the LT3990-3.3, connects to the internal feedback divider, and is tied internally to pin 2 for a redundant output path, so tie the output to both pins. |
| 2 | VOUT | input | Second VOUT pin, connected internally to pin 1 to give a redundant path to the output; tie the output to both pins. |
| 3 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 4 | EN/UVLO | input | Part is in shutdown when low and active when high, with a 1.19V rising threshold and 35mV hysteresis; tie to VIN if unused, and ground it if VIN is below 4.2V. |
| 5 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 6 | VIN | power_in | Supplies current to the internal circuitry and the internal power switch (4.2V to 62V operating) and must be locally bypassed. |
| 7 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 8 | GND | power_in | Ground pin. |
| 9 | SW | output | Output of the internal power switch; connect this pin to the inductor. |
| 10 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 11 | BOOST | passive | Provides a drive voltage higher than the input voltage to the internal bipolar NPN power switch (boost capacitor connects to SW). |
| 12 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 13 | BD | input | Anode of the boost diode, which also supplies current to the internal regulator when BD is above 3.2V. |
| 14 | PG | output | Open-drain output of an internal comparator that stays low until the output is within 10% of final regulation; valid when VIN is above 4.2V and EN/UVLO is high. |
| 15 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 16 | RT | passive | A resistor from RT to ground sets the switching frequency (200kHz to 2.2MHz). |
| 17 | GND | power_in | Exposed pad is ground and must be soldered to the PCB. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-16-EP |
| Category | Power Management ICs |
| Pins | 17 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage (LT3990-3.3) | VOUT | 3.26 | 3.3 | 3.34 | V | TA = 25°C | 3 |
| Output Voltage (LT3990-3.3) over temperature | VOUT | 3.234 | 3.3 | 3.366 | V | full operating temperature range | 3 |
| Minimum Input Voltage | VIN | 4 | 4.2 | V | over full operating temperature range | 3 | |
| Quiescent Current from VIN, VEN/UVLO Low | IQ | 0.7 | µA | VEN/UVLO Low | 3 | ||
| Quiescent Current from VIN, VEN/UVLO High | IQ | 1.9 | 2.8 | µA | VEN/UVLO High | 3 | |
| Quiescent Current from VIN, VEN/UVLO High, full temp | IQ | 1.2 | 4 | µA | VEN/UVLO High, full temperature range | 3 | |
| FB/Output Voltage Line Regulation | 0.0002 | 0.01 | %/V | 4.2V < VIN < 40V | 3 | ||
| Switching Frequency | fSW | 1.84 | 2.3 | 2.76 | MHz | RT = 41.2k, VIN = 6V | 3 |
| Switching Frequency | fSW | 672 | 840 | 1008 | kHz | RT = 158k, VIN = 6V | 3 |
| Switching Frequency | fSW | 168 | 210 | 252 | kHz | RT = 768k, VIN = 6V | 3 |
| Switch Current Limit | 535 | 700 | 865 | mA | VIN = 5V, VFB = 0V | 3 | |
| Catch Schottky Current Limit | 360 | 450 | 540 | mA | VIN = 5V | 3 | |
| Switch VCESAT | VCESAT | 210 | mV | ISW = 200mA | 3 | ||
| Switch Leakage Current | 0.05 | 2 | µA | 3 | |||
| Catch Schottky Forward Voltage | 725 | mV | ISCH = 100mA, VIN = VBD = NC | 3 | |||
| Catch Schottky Reverse Leakage | 0.05 | 2 | µA | VSW = 12V | 3 | ||
| Boost Schottky Forward Voltage | 900 | mV | ISCH = 50mA, VIN = NC, VBOOST = 0V | 3 | |||
| Boost Schottky Reverse Leakage | 0.02 | 2 | µA | VREVERSE = 12V | 3 | ||
| Minimum Boost Voltage | 1.4 | 1.8 | V | VIN = 5V, full temperature range | 3 | ||
| BOOST Pin Current | 8.5 | 12 | mA | ISW = 200mA, VBOOST = 15V | 3 | ||
| EN/UVLO Pin Current | 1 | 30 | nA | VEN/UVLO = 12V | 3 | ||
| EN/UVLO Voltage Threshold | 1.14 | 1.19 | 1.28 | V | EN/UVLO Rising, VIN ≥ 4.2V | 3 | |
| EN/UVLO Voltage Hysteresis | 35 | mV | 3 | ||||
| PG Threshold Offset from Feedback Voltage | 6.5 | 10 | 13.5 | % | VFB Rising | 3 | |
| PG Hysteresis as % of Output Voltage | 1 | % | 3 | ||||
| PG Leakage | 0.01 | 1 | µA | VPG = 3V | 3 | ||
| PG Sink Current | 30 | 80 | µA | VPG = 0.4V | 3 | ||
| Minimum Switch On-Time | tON(MIN) | 115 | ns | 3 | |||
| Minimum Switch Off-Time | tOFF(MIN) | 100 | 160 | ns | VIN = 10V | 3 | |
| BOOST Pin Above SW Pin | 30 | V | 2 | ||||
| FB/VOUT, RT Voltage | 6 | V | 2 | ||||
| PG, BD Voltage | 30 | V | 2 | ||||
| Operating Junction Temperature Range (E-grade) | TJ | -40 | 125 | °C | LT3990E-X | 2 | |
| Storage Temperature Range | Tstg | -65 | 150 | °C | 2 | ||
| Lead Temperature (Soldering, 10 sec) | 300 | °C | MS only | 2 | |||
| Thermal Resistance Junction-to-Ambient | θJA | 40 | °C/W | MSE package | 2 | ||
| Thermal Resistance Junction-to-Case | θJC | 10 | °C/W | MSE package | 2 |
CAD (KiCad official)
- Symbol:
LT3990EMSE-3.3#PBF - Footprint:
Package_SO:MSOP-16-1EP_3x4.039mm_P0.5mm_EP1.651x2.845mm - 3D model: MSOP-16-EP (KiCad packages3D, STEP)
- 3D model files:
lt3990emse-3-3-pbf-etched.step/lt3990emse-3-3-pbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt3990emse-3-3-pbf.step/lt3990emse-3-3-pbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (22 pp, sha256
9b5280ede098d3fb, retrieved 2026-10-30, 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).
# LT3990EMSE-3.3#PBF
**Analog Devices** · DC-DC Converters · MSOP-16-EP
LT3990EMSE-3.3#PBF from Analog Devices, in a MSOP-16-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 | VOUT | input | Regulated to 3.3V for the LT3990-3.3, connects to the internal feedback divider, and is tied internally to pin 2 for a redundant output path, so tie the output to both pins. |
| 2 | VOUT | input | Second VOUT pin, connected internally to pin 1 to give a redundant path to the output; tie the output to both pins. |
| 3 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 4 | EN/UVLO | input | Part is in shutdown when low and active when high, with a 1.19V rising threshold and 35mV hysteresis; tie to VIN if unused, and ground it if VIN is below 4.2V. |
| 5 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 6 | VIN | power_in | Supplies current to the internal circuitry and the internal power switch (4.2V to 62V operating) and must be locally bypassed. |
| 7 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 8 | GND | power_in | Ground pin. |
| 9 | SW | output | Output of the internal power switch; connect this pin to the inductor. |
| 10 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 11 | BOOST | passive | Provides a drive voltage higher than the input voltage to the internal bipolar NPN power switch (boost capacitor connects to SW). |
| 12 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 13 | BD | input | Anode of the boost diode, which also supplies current to the internal regulator when BD is above 3.2V. |
| 14 | PG | output | Open-drain output of an internal comparator that stays low until the output is within 10% of final regulation; valid when VIN is above 4.2V and EN/UVLO is high. |
| 15 | NC | unconnected | No connect, not connected to internal circuitry and must be left floating to ensure fault tolerance. |
| 16 | RT | passive | A resistor from RT to ground sets the switching frequency (200kHz to 2.2MHz). |
| 17 | GND | power_in | Exposed pad is ground and must be soldered to the PCB. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-16-EP |
| Category | Power Management ICs |
| Pins | 17 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output Voltage (LT3990-3.3) | VOUT | 3.26 | 3.3 | 3.34 | V | TA = 25°C | 3 |
| Output Voltage (LT3990-3.3) over temperature | VOUT | 3.234 | 3.3 | 3.366 | V | full operating temperature range | 3 |
| Minimum Input Voltage | VIN | | 4 | 4.2 | V | over full operating temperature range | 3 |
| Quiescent Current from VIN, VEN/UVLO Low | IQ | | 0.7 | | µA | VEN/UVLO Low | 3 |
| Quiescent Current from VIN, VEN/UVLO High | IQ | | 1.9 | 2.8 | µA | VEN/UVLO High | 3 |
| Quiescent Current from VIN, VEN/UVLO High, full temp | IQ | | 1.2 | 4 | µA | VEN/UVLO High, full temperature range | 3 |
| FB/Output Voltage Line Regulation | | | 0.0002 | 0.01 | %/V | 4.2V < VIN < 40V | 3 |
| Switching Frequency | fSW | 1.84 | 2.3 | 2.76 | MHz | RT = 41.2k, VIN = 6V | 3 |
| Switching Frequency | fSW | 672 | 840 | 1008 | kHz | RT = 158k, VIN = 6V | 3 |
| Switching Frequency | fSW | 168 | 210 | 252 | kHz | RT = 768k, VIN = 6V | 3 |
| Switch Current Limit | | 535 | 700 | 865 | mA | VIN = 5V, VFB = 0V | 3 |
| Catch Schottky Current Limit | | 360 | 450 | 540 | mA | VIN = 5V | 3 |
| Switch VCESAT | VCESAT | | 210 | | mV | ISW = 200mA | 3 |
| Switch Leakage Current | | | 0.05 | 2 | µA | | 3 |
| Catch Schottky Forward Voltage | | | 725 | | mV | ISCH = 100mA, VIN = VBD = NC | 3 |
| Catch Schottky Reverse Leakage | | | 0.05 | 2 | µA | VSW = 12V | 3 |
| Boost Schottky Forward Voltage | | | 900 | | mV | ISCH = 50mA, VIN = NC, VBOOST = 0V | 3 |
| Boost Schottky Reverse Leakage | | | 0.02 | 2 | µA | VREVERSE = 12V | 3 |
| Minimum Boost Voltage | | | 1.4 | 1.8 | V | VIN = 5V, full temperature range | 3 |
| BOOST Pin Current | | | 8.5 | 12 | mA | ISW = 200mA, VBOOST = 15V | 3 |
| EN/UVLO Pin Current | | | 1 | 30 | nA | VEN/UVLO = 12V | 3 |
| EN/UVLO Voltage Threshold | | 1.14 | 1.19 | 1.28 | V | EN/UVLO Rising, VIN ≥ 4.2V | 3 |
| EN/UVLO Voltage Hysteresis | | | 35 | | mV | | 3 |
| PG Threshold Offset from Feedback Voltage | | 6.5 | 10 | 13.5 | % | VFB Rising | 3 |
| PG Hysteresis as % of Output Voltage | | | 1 | | % | | 3 |
| PG Leakage | | | 0.01 | 1 | µA | VPG = 3V | 3 |
| PG Sink Current | | 30 | 80 | | µA | VPG = 0.4V | 3 |
| Minimum Switch On-Time | tON(MIN) | | 115 | | ns | | 3 |
| Minimum Switch Off-Time | tOFF(MIN) | | 100 | 160 | ns | VIN = 10V | 3 |
| BOOST Pin Above SW Pin | | | | 30 | V | | 2 |
| FB/VOUT, RT Voltage | | | | 6 | V | | 2 |
| PG, BD Voltage | | | | 30 | V | | 2 |
| Operating Junction Temperature Range (E-grade) | TJ | -40 | | 125 | °C | LT3990E-X | 2 |
| Storage Temperature Range | Tstg | -65 | | 150 | °C | | 2 |
| Lead Temperature (Soldering, 10 sec) | | | | 300 | °C | MS only | 2 |
| Thermal Resistance Junction-to-Ambient | θJA | | 40 | | °C/W | MSE package | 2 |
| Thermal Resistance Junction-to-Case | θJC | | 10 | | °C/W | MSE package | 2 |
## CAD (KiCad official)
- Symbol: `LT3990EMSE-3.3#PBF`
- Footprint: `Package_SO:MSOP-16-1EP_3x4.039mm_P0.5mm_EP1.651x2.845mm`
- 3D model: MSOP-16-EP (KiCad packages3D, STEP)
- 3D model files: `lt3990emse-3-3-pbf-etched.step` / `lt3990emse-3-3-pbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt3990emse-3-3-pbf.step` / `lt3990emse-3-3-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/lt3990.pdf) (22 pp, sha256 `9b5280ede098d3fb`, retrieved 2026-10-30, 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/lt3990emse-3-3-pbf-datasheet.pdf)