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LT1308BIS8#TRPBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, SOIC-8. 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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Contents
README
markdownLT1308BIS8#TRPBF
Analog Devices · DC-DC Converters · SOIC-8
LT1308BIS8#TRPBF from Analog Devices, in a SOIC-8. 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 | VC | passive | Compensation pin for the error amplifier; connect a series RC from this pin to ground (typically 47kΩ and 100pF) and minimize trace area at VC. |
| 2 | FB | input | Feedback pin with a 1.22V reference; connect the resistive divider tap here with VOUT = 1.22V(1 + R1/R2), and keep FB trace area small; FB voltage is limited to VIN + 1V and current into FB to ±1mA. |
| 3 | SHDN | input | Shutdown pin: ground to turn the switcher off, tie to 1V or more to enable; it does not need to be tied to VIN, and absolute maximum voltage is 10V. |
| 4 | GND | power_in | Ground pin to be connected directly to the local ground plane, which also serves as the heat sink for the package. |
| 5 | SW | output | Switch pin that connects to the inductor and diode; minimize its trace area to reduce EMI, with the SW voltage rated from -0.4V to 36V. |
| 6 | VIN | power_in | Supply pin with an operating input range of 1V to 10V that must have a local bypass capacitor connected right at the pin to ground. |
| 7 | LBI | input | Low-battery detector input with a 200mV threshold; the voltage on LBI must stay between -100mV and 1V, and the pin should float if the detector is unused. |
| 8 | LBO | output | Open-collector low-battery detector output that can sink 50μA, with a 220kΩ pull-up recommended; it is high impedance when SHDN is grounded and absolute maximum voltage is 10V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Switching quiescent current (LT1308B) | IQ | 2.5 | 4 | mA | Switching, LT1308B; l; VIN = 1.2V, VSHDN = VIN | 3 | |
| Quiescent current in shutdown | IQ | 0.01 | 1 | μA | VSHDN = 0V (LT1308A/LT1308B); l; VIN = 1.2V | 3 | |
| Feedback voltage | VFB | 1.19 | 1.22 | 1.25 | V | l; VIN = 1.2V, VSHDN = VIN | 3 |
| FB pin bias current | IB | 27 | 80 | nA | l; VIN = 1.2V, VSHDN = VIN | 3 | |
| Reference line regulation | 0.05 | 0.4 | %/V | 1.1V ≤ VIN ≤ 2V; l; VIN = 1.2V, VSHDN = VIN | 3 | ||
| Reference line regulation | 0.01 | 0.2 | %/V | 2V ≤ VIN ≤ 10V; l; VIN = 1.2V, VSHDN = VIN | 3 | ||
| Minimum input voltage | 0.92 | 1 | V | 3 | |||
| Switching frequency | fOSC | 500 | 600 | 750 | kHz | l; VIN = 1.2V, VSHDN = VIN | 4 |
| Maximum duty cycle | 82 | 90 | % | l; VIN = 1.2V, VSHDN = VIN | 4 | ||
| Switch current limit | 2 | 3 | 4.5 | A | Duty Cycle = 30% (Note 4) | 4 | |
| Switch VCESAT | VCESAT | 290 | 350 | mV | ISW = 2A (25°C, -40°C), VIN = 1.5V | 4 | |
| Switch VCESAT | VCESAT | 330 | 400 | mV | ISW = 2A (85°C), VIN = 1.5V | 4 | |
| Shutdown pin current | 2 | 5 | μA | VSHDN = 1.1V; l | 4 | ||
| Shutdown pin current | 20 | 35 | μA | VSHDN = 6V; l | 4 | ||
| Shutdown pin current | 0.01 | 0.1 | μA | VSHDN = 0V; l | 4 | ||
| LBI threshold voltage | 196 | 200 | 204 | mV | l | 4 | |
| LBI threshold voltage | 193 | 200 | 207 | mV | l | 4 | |
| LBO output low | 0.1 | 0.25 | V | ISINK = 50μA; l | 4 | ||
| LBO leakage current | 0.01 | 0.1 | μA | VLBI = 250mV, VLBO = 5V; l | 4 | ||
| LBI input bias current | 33 | 100 | nA | VLBI = 150mV | 4 | ||
| Switch leakage current | 0.01 | 10 | μA | VSW = 5V; l | 4 | ||
| VIN, SHDN, LBO voltage | 10 | V | 2 | ||||
| SW voltage | -0.4 | 36 | V | 2 | |||
| VC voltage | 2 | V | 2 | ||||
| LBI voltage | -0.1 | 1 | V | 2 | |||
| Current into FB pin | -1 | 1 | mA | 2 | |||
| Storage temperature range | -65 | 150 | °C | 2 | |||
| Lead temperature (soldering) | 300 | °C | 10 sec | 2 | |||
| Operating temperature range (Industrial grade) | -40 | 85 | °C | Industrial grade (LT1308BIS8, -40°C to 85°C) | 2 | ||
| Input voltage range | VIN | 1 | 10 | V | Operating input voltage range stated in datasheet description | 1 | |
| Thermal resistance, junction-to-ambient (S8 package) | θJA | 190 | °C/W | 8-lead plastic SO (S8 package) | 2 | ||
| Maximum junction temperature | TJMAX | 125 | °C | 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 | connected to these pins also functions as a heat sink. For the TSSOP package, connect all pins to ground copper | 6 |
CAD (KiCad official)
- Symbol:
LT1308BIS8#TRPBF - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
lt1308bis8-trpbf-etched.step/lt1308bis8-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt1308bis8-trpbf.step/lt1308bis8-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (20 pp, sha256
11d1f4d87cd83de1, retrieved 2026-10-21, 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).