component
LT3502AIDC#TRPBF
Public Made by Adomby adom
Analog Devices DC-DC Converters, DFN-8-EP(2x2). 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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README
markdownLT3502AIDC#TRPBF
Analog Devices · DC-DC Converters · DFN-8-EP(2x2)
LT3502AIDC#TRPBF from Analog Devices, in a DFN-8-EP(2x2). 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 | The VIN pin supplies current to the internal regulator and internal power switch and must be locally bypassed. |
| 2 | BD | power_in | The BD pin provides current to the internal boost Schottky diode. |
| 3 | FB | input | The feedback pin regulates to 0.8V; connect the feedback divider tap here, with VOUT = 0.8 (1 + R1/R2) and a good value for R2 of 10k. |
| 4 | SHDN | input | Tie to ground to shut down the device and to 2V or more for normal operation; SHDN voltage should not be higher than VIN, and it also provides soft-start and frequency foldback when R3 and C4 are connected. |
| 5 | GND | power_in | Ground pin. |
| 6 | DA | input | Connect the catch diode (D1) anode to this pin; it is used to provide frequency foldback in extreme situations. |
| 7 | BOOST | power_out | The BOOST pin provides a drive voltage higher than the input voltage to the internal NPN power switch and requires a boost capacitor connected from this pin to SW. |
| 8 | SW | output | The SW pin is the output of the internal power switch and connects to the inductor, catch diode and boost capacitor. |
| 9 | GND | power_in | The exposed pad is GND and must be soldered to the PCB. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | DFN-8-EP(2x2) |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Undervoltage Lockout | 2.6 | 2.8 | 3 | V | 3 | ||
| Quiescent Current at Shutdown | 0.5 | 2 | µA | VSHDN = 0V | 3 | ||
| Quiescent Current Not Switching | 1.5 | 2 | mA | 3 | |||
| Feedback Voltage (2mm × 2mm DFN, first row) | 0.785 | 0.8 | 0.813 | V | 2mm × 2mm DFN; l = full operating temperature range | 3 | |
| Feedback Voltage (2mm × 2mm DFN, second row) | 0.79 | 0.8 | 0.81 | V | 2mm × 2mm DFN; l = full operating temperature range | 3 | |
| FB Pin Bias Current | 15 | 50 | nA | Note 5 (current flows out of pin); l = full operating temperature range | 3 | ||
| Switching Frequency (LT3502A, first row) | 1.9 | 2.25 | 2.7 | MHz | IDA < 500mA (LT3502A); l = full operating temperature range | 3 | |
| Switching Frequency (LT3502A, second row) | 1.8 | 2.25 | 2.8 | MHz | IDA < 500mA (LT3502A); l = full operating temperature range | 3 | |
| Maximum Duty Cycle (100mA Load, LT3502A) | 70 | 80 | % | 100mA Load (LT3502A) | 3 | ||
| Switch VCESAT | VCESAT | 450 | mV | ISW = 500mA | 3 | ||
| Switch Current Limit | 0.75 | 0.9 | 1.1 | A | Note 3 | 3 | |
| Switch Active Current | 95 | 130 | µA | SW = 10V (Note 4) | 3 | ||
| Switch Active Current | 8 | 30 | µA | SW = 0V (Note 5) | 3 | ||
| BOOST Pin Current | 10 | 13 | mA | ISW = 500mA | 3 | ||
| Minimum BOOST Voltage Above Switch | 1.9 | 2.2 | V | ISW = 500mA | 3 | ||
| BOOST Schottky Forward Drop | 0.8 | 1 | V | IOUT = 100mA | 3 | ||
| DA Pin Current to Stop OSC | 500 | 650 | mA | 3 | |||
| SHDN Bias Current | 55 | 80 | µA | VSHDN = 5V | 3 | ||
| SHDN Bias Current | 1 | µA | VSHDN = 0V | 3 | |||
| SHDN Input Voltage High | 2 | V | 3 | ||||
| SHDN Input Voltage Low | 0.3 | V | 3 | ||||
| Input Voltage (VIN) | VIN | 40 | V | Absolute Maximum Ratings | 2 | ||
| BOOST Voltage | BOOST | 50 | V | Absolute Maximum Ratings | 2 | ||
| BOOST Pin Above SW Pin | 7 | V | Absolute Maximum Ratings | 2 | |||
| FB Voltage | FB | 6 | V | Absolute Maximum Ratings | 2 | ||
| SHDN Voltage | SHDN | 40 | V | Absolute Maximum Ratings | 2 | ||
| BD Voltage | BD | 7 | V | Absolute Maximum Ratings | 2 | ||
| Storage Temperature Range | -65 | 150 | °C | Absolute Maximum Ratings | 2 | ||
| Operating Junction Temperature Range (LT3502AI) | -40 | 125 | °C | LT3502AI; Note 2 | 2 | ||
| Minimum Operating Input Voltage | VIN | 3 | V | Minimum operating voltage (Input Voltage Range section) | 10 | ||
| Thermal Resistance Junction-to-Ambient (DC package) | θJA | 102 | °C/W | 8-lead 2mm × 2mm plastic DFN (DC package) | 2 |
CAD (KiCad official)
- Symbol:
LT3502AIDC#TRPBF - Footprint:
Package_DFN_QFN:DFN-8-1EP_2x2mm_P0.5mm_EP0.6x1.2mm - 3D model: DFN-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files:
lt3502aidc-trpbf-etched.step/lt3502aidc-trpbf-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lt3502aidc-trpbf.step/lt3502aidc-trpbf.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Analog Devices datasheet (24 pp, sha256
ee1026fdeba3ecdd, retrieved 2026-10-19, 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).