component
LT1961EMS8E#TRPBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, MSOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
LT1961EMS8E#TRPBF
Analog Devices · DC-DC Converters · MSOP-8-EP
LT1961EMS8E#TRPBF from Analog Devices, in a MSOP-8-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 | VIN | power_in | This pin powers the internal circuitry and internal regulator, and the external bypass capacitor should be kept close to it. |
| 2 | SW | output | The switch pin is the collector of the on-chip 1.5A power NPN switch, which carries large currents, so its traces to the switching components should be kept as short as possible. |
| 3 | GND | power_in | This pin is the reference for the regulated output and should be shorted to GND pin 4 and the exposed pad on the PCB. |
| 4 | GND | power_in | This pin is the reference for the regulated output and should be shorted to GND pin 3 and the exposed pad on the PCB. |
| 5 | SHDN | input | The shutdown pin turns the regulator off using a 1.35V threshold, reducing input drain current to a few microamperes, and must be floated or pulled high to operate. |
| 6 | FB | input | The feedback pin sets the output voltage through an external divider that generates 1.2V at the pin, and an impedance below 5kΩ is needed for current-limit foldback during startup when FB is below 0.5V. |
| 7 | VC | passive | The VC pin is the error amplifier output used for frequency compensation, sitting at about 0.3V for very light loads and 0.9V at maximum load. |
| 8 | SYNC | input | The sync pin synchronizes the internal oscillator to an external logic signal with a 20% to 80% duty cycle over a range up to 2MHz, and should be grounded when not in use. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8-EP |
| Category | Power Management ICs |
| Pins | 9 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Recommended Operating Voltage | 3 | 25 | V | 2 | |||
| Maximum Switch Current Limit | 1.5 | 2 | 3 | A | 2 | ||
| Oscillator Frequency | 1 | 1.5 | MHz | 3.3V < VIN < 25V | 2 | ||
| Switch On Voltage Drop | 310 | 500 | mV | ISW = 1.5A | 2 | ||
| VIN Undervoltage Lockout | 2.47 | 2.6 | 2.73 | V | (Note 3) | 2 | |
| VIN Supply Current | 0.9 | 1.3 | mA | ISW = 0A | 2 | ||
| VIN Supply Current/ISW | 27 | mA/A | ISW = 1.5A | 2 | |||
| Shutdown Supply Current | 6 | 20 | μA | VSHDN = 0V, VIN = 25V, VSW = 25V | 2 | ||
| Shutdown Supply Current (full temperature range) | 45 | μA | 2 | ||||
| Feedback Voltage | 1.182 | 1.2 | 1.218 | V | 3V < VIN < 25V, 0.4V < VC < 0.9V | 2 | |
| Feedback Voltage (full temperature range) | 1.176 | 1.224 | V | 2 | |||
| FB Input Current | 0 | -0.2 | -0.4 | μA | 3 | ||
| FB to VC Voltage Gain | 150 | 350 | 0.4V < VC < 0.9V | 3 | |||
| FB to VC Transconductance | 500 | 850 | 1300 | μMho | ΔIVC = ±10μA | 3 | |
| VC Pin Source Current | -165 | -120 | -85 | μA | VFB = 1V | 3 | |
| VC Pin Sink Current | 70 | 110 | 165 | μA | VFB = 1.4V | 3 | |
| VC Pin to Switch Current Transconductance | 2.4 | A/V | 3 | ||||
| VC Pin Minimum Switching Threshold | 0.3 | V | Duty Cycle = 0% | 3 | |||
| VC Pin 1.5A ISW Threshold | 0.9 | V | 3 | ||||
| Maximum Switch Duty Cycle | 80 | 90 | % | VC = 1.2V, ISW = 100mA | 3 | ||
| Maximum Switch Duty Cycle | 75 | 80 | % | VC = 1.2V, ISW = 1A, 25°C ≤ TA ≤ 125°C | 3 | ||
| Maximum Switch Duty Cycle | 70 | 75 | % | VC = 1.2V, ISW = 1A, TA ≤ 25°C | 3 | ||
| SHDN Threshold Voltage | 1.28 | 1.35 | 1.42 | V | 3 | ||
| SHDN Input Current (Shutting Down) | -7 | -10 | -13 | μA | SHDN = 60mV Above Threshold | 3 | |
| SHDN Threshold Current Hysteresis | 4 | 7 | 10 | μA | SHDN = 100mV Below Threshold | 3 | |
| SYNC Threshold Voltage | 1.5 | 2.2 | V | 3 | |||
| SYNC Input Frequency | 1.5 | 2 | MHz | 3 | |||
| SYNC Pin Resistance | 20 | kΩ | ISYNC = 1mA | 3 | |||
| Input Voltage | 25 | V | 2 | ||||
| Switch Voltage | 35 | V | 2 | ||||
| SHDN Pin | 25 | V | 2 | ||||
| FB Pin Current | 1 | mA | 2 | ||||
| SYNC Pin Current | 1 | mA | 2 | ||||
| Operating Junction Temperature Range (LT1961E, LT1961I) | TJ | -40 | 125 | °C | 2 | ||
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Lead Temperature (Soldering, 10 sec) | 300 | °C | 10 sec soldering | 2 | |||
| Thermal Resistance Junction to Ambient | θJA | 50 | °C/W | Ground pad connected to large copper area | 2 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | the path between the input bypass and the GND pins short. The exposed pad should be attached to a large copper area | 5 |
CAD (KiCad official)
- Symbol:
LT1961EMS8E#TRPBF - Footprint:
Package_SO:MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm - 3D model: MSOP-8-EP (KiCad packages3D, STEP)
- 3D model files:
lt1961ems8e-trpbf-etched.step/lt1961ems8e-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt1961ems8e-trpbf.step/lt1961ems8e-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (16 pp, sha256
81fb93bdc39714ee, retrieved 2026-10-30, 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).
# LT1961EMS8E#TRPBF
**Analog Devices** · DC-DC Converters · MSOP-8-EP
LT1961EMS8E#TRPBF from Analog Devices, in a MSOP-8-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 | VIN | power_in | This pin powers the internal circuitry and internal regulator, and the external bypass capacitor should be kept close to it. |
| 2 | SW | output | The switch pin is the collector of the on-chip 1.5A power NPN switch, which carries large currents, so its traces to the switching components should be kept as short as possible. |
| 3 | GND | power_in | This pin is the reference for the regulated output and should be shorted to GND pin 4 and the exposed pad on the PCB. |
| 4 | GND | power_in | This pin is the reference for the regulated output and should be shorted to GND pin 3 and the exposed pad on the PCB. |
| 5 | SHDN | input | The shutdown pin turns the regulator off using a 1.35V threshold, reducing input drain current to a few microamperes, and must be floated or pulled high to operate. |
| 6 | FB | input | The feedback pin sets the output voltage through an external divider that generates 1.2V at the pin, and an impedance below 5kΩ is needed for current-limit foldback during startup when FB is below 0.5V. |
| 7 | VC | passive | The VC pin is the error amplifier output used for frequency compensation, sitting at about 0.3V for very light loads and 0.9V at maximum load. |
| 8 | SYNC | input | The sync pin synchronizes the internal oscillator to an external logic signal with a 20% to 80% duty cycle over a range up to 2MHz, and should be grounded when not in use. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-8-EP |
| Category | Power Management ICs |
| Pins | 9 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Recommended Operating Voltage | | 3 | | 25 | V | | 2 |
| Maximum Switch Current Limit | | 1.5 | 2 | 3 | A | | 2 |
| Oscillator Frequency | | 1 | | 1.5 | MHz | 3.3V < VIN < 25V | 2 |
| Switch On Voltage Drop | | | 310 | 500 | mV | ISW = 1.5A | 2 |
| VIN Undervoltage Lockout | | 2.47 | 2.6 | 2.73 | V | (Note 3) | 2 |
| VIN Supply Current | | | 0.9 | 1.3 | mA | ISW = 0A | 2 |
| VIN Supply Current/ISW | | | 27 | | mA/A | ISW = 1.5A | 2 |
| Shutdown Supply Current | | | 6 | 20 | μA | VSHDN = 0V, VIN = 25V, VSW = 25V | 2 |
| Shutdown Supply Current (full temperature range) | | | | 45 | μA | | 2 |
| Feedback Voltage | | 1.182 | 1.2 | 1.218 | V | 3V < VIN < 25V, 0.4V < VC < 0.9V | 2 |
| Feedback Voltage (full temperature range) | | 1.176 | | 1.224 | V | | 2 |
| FB Input Current | | 0 | -0.2 | -0.4 | μA | | 3 |
| FB to VC Voltage Gain | | 150 | | 350 | | 0.4V < VC < 0.9V | 3 |
| FB to VC Transconductance | | 500 | 850 | 1300 | μMho | ΔIVC = ±10μA | 3 |
| VC Pin Source Current | | -165 | -120 | -85 | μA | VFB = 1V | 3 |
| VC Pin Sink Current | | 70 | 110 | 165 | μA | VFB = 1.4V | 3 |
| VC Pin to Switch Current Transconductance | | | 2.4 | | A/V | | 3 |
| VC Pin Minimum Switching Threshold | | | 0.3 | | V | Duty Cycle = 0% | 3 |
| VC Pin 1.5A ISW Threshold | | | 0.9 | | V | | 3 |
| Maximum Switch Duty Cycle | | 80 | 90 | | % | VC = 1.2V, ISW = 100mA | 3 |
| Maximum Switch Duty Cycle | | 75 | 80 | | % | VC = 1.2V, ISW = 1A, 25°C ≤ TA ≤ 125°C | 3 |
| Maximum Switch Duty Cycle | | 70 | 75 | | % | VC = 1.2V, ISW = 1A, TA ≤ 25°C | 3 |
| SHDN Threshold Voltage | | 1.28 | 1.35 | 1.42 | V | | 3 |
| SHDN Input Current (Shutting Down) | | -7 | -10 | -13 | μA | SHDN = 60mV Above Threshold | 3 |
| SHDN Threshold Current Hysteresis | | 4 | 7 | 10 | μA | SHDN = 100mV Below Threshold | 3 |
| SYNC Threshold Voltage | | 1.5 | | 2.2 | V | | 3 |
| SYNC Input Frequency | | 1.5 | | 2 | MHz | | 3 |
| SYNC Pin Resistance | | | 20 | | kΩ | ISYNC = 1mA | 3 |
| Input Voltage | | | | 25 | V | | 2 |
| Switch Voltage | | | | 35 | V | | 2 |
| SHDN Pin | | | | 25 | V | | 2 |
| FB Pin Current | | | | 1 | mA | | 2 |
| SYNC Pin Current | | | | 1 | mA | | 2 |
| Operating Junction Temperature Range (LT1961E, LT1961I) | TJ | -40 | | 125 | °C | | 2 |
| Storage Temperature Range | | -65 | | 150 | °C | | 2 |
| Lead Temperature (Soldering, 10 sec) | | | | 300 | °C | 10 sec soldering | 2 |
| Thermal Resistance Junction to Ambient | θJA | | 50 | | °C/W | Ground pad connected to large copper area | 2 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | | the path between the input bypass and the GND pins short. The exposed pad should be attached to a large copper area | 5 |
## CAD (KiCad official)
- Symbol: `LT1961EMS8E#TRPBF`
- Footprint: `Package_SO:MSOP-8-1EP_3x3mm_P0.65mm_EP1.5x1.8mm`
- 3D model: MSOP-8-EP (KiCad packages3D, STEP)
- 3D model files: `lt1961ems8e-trpbf-etched.step` / `lt1961ems8e-trpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt1961ems8e-trpbf.step` / `lt1961ems8e-trpbf.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/1961fa.pdf) (16 pp, sha256 `81fb93bdc39714ee`, retrieved 2026-10-30, 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](docs/lt1961ems8e-trpbf-datasheet.pdf)