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LT4356IMS-1#TRPBF
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Analog Devices Surge Protection Devices (SPDs), MSOP-10. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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Symbol & Footprint
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Datasheet
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README
markdownLT4356IMS-1#TRPBF
Analog Devices · Surge Protection Devices (SPDs) · MSOP-10
LT4356IMS-1#TRPBF from Analog Devices, in a MSOP-10. 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 | FB | input | Voltage regulator feedback input that connects to the center tap of the output divider, is servoed to a 1.25V threshold during overvoltage, is internally clamped to 7V, and should be tied to GND to disable the OV clamp. |
| 2 | OUT | input | Output voltage sense input that senses the N-channel MOSFET source voltage, sets the fault timer current, and causes EN to go high impedance when OUT reaches 0.7V below VCC. |
| 3 | GATE | output | N-channel MOSFET gate drive output that is pulled up by an internal charge pump current source and clamped to 14V above the OUT pin. |
| 4 | SNS | input | Current sense input connected to the sense resistor output that limits the VCC-to-SNS sense voltage to 50mV, may be pulled below GND by up to 60V, and must keep the VCC-to-SNS difference below 30V. |
| 5 | VCC | power_in | Positive supply input for 4V to 80V normal operation that can be pulled below ground by up to 60V during reverse battery without damage, and whose supply current drops to 7μA with all functional blocks off. |
| 6 | SHDN | input | Shutdown control input that puts the part in low-current mode when pulled below 0.4V, turns it on when pulled above 2.1V or left floating, and withstands up to 100V or 60V below GND without damage. |
| 7 | FLT | output | Open-collector fault output that pulls low once TMR reaches the 1.25V fault threshold and can sink up to 3mA from 80V to drive an LED or opto-coupler. |
| 8 | EN | output | Open-collector enable output that goes high impedance when OUT is above VCC-0.7V, latches until OUT falls below 0.5V and rises above 2V, and can sink up to 3mA from 80V. |
| 9 | GND | power_in | Device ground reference for all pins. |
| 10 | TMR | input | Fault timer input where a capacitor to ground sets the early warning, fault and cool-down periods, with FLT pulling low at 1.25V, the pass transistor turning off at 1.35V, and GATE restarting at the 0.5V retry threshold. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-10 |
| Category | Circuit Protection |
| Pins | 10 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VCC, SHDN pin voltage | VCC, SHDN | -60 | 100 | V | 2 | ||
| SNS pin voltage | SNS | -60 | V | VCC, 30V or -60V to VCC + 0.3V | 2 | ||
| OUT, AOUT, FLT, EN pin voltage | OUT, AOUT, FLT, EN | -0.3 | 80 | V | 2 | ||
| GATE pin voltage | GATE | -0.3 | V | to VOUT + 10V (Note 3) | 2 | ||
| FB, TMR, IN+ pin voltage | FB, TMR, IN+ | -0.3 | 6 | V | 2 | ||
| AOUT, EN, FLT, IN+ pin current | AOUT, EN, FLT, IN+ | -3 | mA | as printed: -3mA | 2 | ||
| Operating temperature range (LT4356I) | TA | -40 | 85 | °C | LT4356I grade | 2 | |
| Storage temperature range (MS) | TSTG | -65 | 150 | °C | MS package | 2 | |
| Lead temperature (soldering, 10 sec) | TLEAD | 300 | °C | MS package, 10 sec | 2 | ||
| Maximum junction temperature | TJMAX | 125 | °C | MS package | 2 | ||
| Thermal resistance, junction to ambient | θJA | 120 | °C/W | MS package | 2 | ||
| VCC operating voltage range | VCC | 4 | 80 | V | Over full operating temperature range | 4 | |
| VCC supply current | ICC | 1 | 1.5 | mA | VSHDN = Float, over full temperature range | 4 | |
| Shutdown supply current (LT4356I-1) | ICC | 7 | 30 | μA | VSHDN = 0V, IN+ = 1.3V, LT4356I-1 | 4 | |
| Reverse input current | IR | 0.3 | 1 | mA | VSNS = VCC = -30V, SHDN open | 4 | |
| Reverse input current | IR | 0.8 | 2 | mA | VSNS = VCC = VSHDN = -30V | 4 | |
| GATE pin output high voltage (ΔVGATE) | ΔVGATE | 4.5 | 8 | V | VCC = 4V; (VGATE, VOUT) | 4 | |
| GATE pin output high voltage (ΔVGATE) | ΔVGATE | 10 | 16 | V | 80V ≥ VCC ≥ 8V; (VGATE, VOUT) | 4 | |
| GATE pin pull-up current | IGATE(UP) | -4 | -23 | -36 | μA | VGATE = 12V; VCC = 12V | 4 |
| GATE pin pull-up current | IGATE(UP) | -4.5 | -30 | -50 | μA | VGATE = 48V; VCC = 48V | 4 |
| GATE pin pull-down current, overvoltage | IGATE(DN) | 75 | 150 | mA | Overvoltage, VFB = 1.4V, VGATE = 12V | 4 | |
| GATE pin pull-down current, overcurrent | IGATE(DN) | 5 | 10 | mA | Overcurrent, VCC, VSNS = 120mV, VGATE = 12V | 4 | |
| GATE pin pull-down current, shutdown | IGATE(DN) | 1.5 | 5 | mA | Shutdown Mode, VSHDN = 0V, VGATE = 12V | 4 | |
| FB pin servo voltage (LT4356I, LT4356C) | VFB | 1.225 | 1.25 | 1.275 | V | VGATE = 12V; VOUT = 12V, LT4356I, LT4356C | 4 |
| FB pin input current | IFB | 0.3 | 1 | μA | VFB = 1.25V | 4 | |
| Overcurrent fault threshold (LT4356I) | ΔVSNS | 45 | 50 | 55 | mV | ΔVSNS = (VCC, VSNS), VCC = 12V, LT4356I, LT4356C | 4 |
| Overcurrent fault threshold (LT4356I) | ΔVSNS | 46 | 51 | 56 | mV | ΔVSNS = (VCC, VSNS), VCC = 48V, LT4356I, LT4356C | 4 |
| SNS pin input current | ISNS | 5 | 10 | 22 | μA | VSNS = VCC = 12V to 48V | 4 |
| FLT, EN pins leakage current | ILEAK | 2.5 | μA | FLT, EN = 80V | 4 | ||
| AOUT pin leakage current | ILEAK | 4.5 | μA | AOUT = 80V | 4 | ||
| TMR pin pull-up current, overvoltage | ITMR | -44 | -50 | -56 | μA | VTMR = 1V, VFB = 1.5V, (VCC, VOUT) = 75V | 4 |
| TMR pin pull-up current, overcurrent | ITMR | -195 | -260 | -315 | μA | VTMR = 1V, ΔVSNS = 60mV, (VCC, VOUT) = 80V | 4 |
| TMR pin pull-down current | ITMR | 1.5 | 2.2 | 2.7 | μA | VTMR = 1V, VFB = 1V, ΔVSNS = 0V | 4 |
| TMR threshold, FLT high to low | VTMR | 1.22 | 1.25 | 1.28 | V | FLT From High to Low, VCC = 5V to 80V | 4 |
| TMR threshold, VGATE low to high | VTMR | 0.48 | 0.5 | 0.52 | V | VGATE From Low to High, VCC = 5V to 80V | 4 |
| Early warning period (ΔVTMR) | ΔVTMR | 80 | 100 | 120 | mV | From FLT going Low to GATE going Low, VCC = 5V to 80V | 4 |
| IN+ pin threshold | VIN+ | 1.22 | 1.25 | 1.28 | V | 4 | |
| IN+ pin input current | IIN+ | 0.3 | 1 | μA | VIN+ = 1.25V | 4 | |
| OUT pin input current | IOUT | 200 | 300 | μA | VOUT = VCC = 12V | 4 | |
| OUT pin input current | IOUT | 6 | 14 | mA | VOUT = VCC = 12V, VSHDN = 0V | 4 | |
| OUT pin high threshold | ΔVOUT | 0.25 | 0.5 | 0.7 | V | ΔVOUT = VCC, VOUT; EN From Low to High | 4 |
| SHDN pin float voltage | VSHDN(FLT) | 0.6 | 1.2 | 2.1 | V | VCC = 12V to 48V | 5 |
| SHDN pin current | ISHDN | -1 | -4 | -8 | μA | VSHDN = 0V | 5 |
| Overcurrent turn-off delay time | tOFF(OC) | 2 | 4 | μs | GATE From High to Low, ΔVSNS = 0 → 120mV | 5 | |
| Overvoltage turn-off delay time | tOFF(OV) | 0.25 | 1 | μs | GATE From High to Low, VFB = 0 → 1.5V | 5 |
CAD (KiCad official)
- Symbol:
LT4356IMS-1#TRPBF - Footprint:
Package_SO:MSOP-10_3x3mm_P0.5mm - 3D model: MSOP-10 (KiCad packages3D, STEP)
- 3D model files:
lt4356ims-1-trpbf-etched.step/lt4356ims-1-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt4356ims-1-trpbf.step/lt4356ims-1-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (26 pp, sha256
d6be158f5fd8cad8, retrieved 2026-10-18, tier: lcsc) - 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).