component
TD1509PR
Public Made by Adomby adom
Techcode Semicon DC-DC Converters, SOP-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
markdownTD1509PR
Techcode Semicon · DC-DC Converters · SOP-8
TD1509PR from Techcode Semicon, in a SOP-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 | Vin | power_in | Positive input supply for the switching regulator, specified at 3.6 V to 45 V, and a suitable input bypass capacitor must be present at this pin to minimize voltage transients. |
| 2 | Output | output | Internal switch output that swings between (+VIN - VSAT) and approximately -0.5 V at a duty cycle of about VOUT/VIN, so the PC board copper area connected to it should be kept minimal. |
| 3 | FB | input | Senses the regulated output voltage to complete the feedback loop; the adjustable version uses a 1.23 V reference, with FB rated from -0.3 V to Vin+0.3 V. |
| 4 | ON/OFF | input | Logic-level shutdown input: pulling it below about 1.3 V turns the regulator on and pulling it above 1.3 V (up to a maximum of 25 V) shuts it down, and leaving it open or tying it to ground keeps the regulator always on. |
| 5 | GND | power_in | Circuit ground, to be connected to a ground plane together with the input and output capacitors, with a maximized copper area recommended for heat dissipation. |
| 6 | GND | power_in | Circuit ground, to be connected to a ground plane together with the input and output capacitors, with a maximized copper area recommended for heat dissipation. |
| 7 | GND | power_in | Circuit ground, to be connected to a ground plane together with the input and output capacitors, with a maximized copper area recommended for heat dissipation. |
| 8 | GND | power_in | Circuit ground, to be connected to a ground plane together with the input and output capacitors, with a maximized copper area recommended for heat dissipation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Techcode Semicon |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| Output Voltage (ADJ) | Vout | 1.18 | 1.23 | 1.28 | V | 11V≤VIN≤45V, 0.2A≤ILOAD≤3A, VOUT for 9V | 6 |
| Feedback bias current | Ib | 10 | 100 | nA | Adjustable only, VFB=1.3V | 5 | |
| Quiescent current | IQ | 5 | 10 | mA | VFB=12V force driver off | 5 | |
| Standby quiescent current | ISTBY | 80 | 250 | uA | ON/OFF=5V, VIN=36V | 5 | |
| Oscillator frequency | FOSC | 127 | 150 | 173 | KHz | 5 | |
| Saturation voltage | VSAT | 1.2 | 1.5 | V | IOUT=3A | 5 | |
| Current limit (peak current) | ICL | 3.8 | 4.2 | A | Peak Current (VFB=0V) | 5 | |
| Output leakage current | IL | 50 | uA | Output=0V (VFB=12V) | 5 | ||
| Output leakage current | IL | 2 | 30 | mA | Output=-1V (VIN=36V) | 5 | |
| ON/OFF pin threshold voltage, low (regulator ON) | VIL | 0.6 | 1.3 | V | Low (Regulator ON) | 5 | |
| ON/OFF pin threshold voltage, high (regulator OFF) | VIH | 1.3 | 2 | V | High (Regulator OFF) | 5 | |
| ON/OFF pin input current, high | IH | 5 | 15 | uA | VLOGIC=2.5V (Regulator OFF) | 5 | |
| ON/OFF pin input current, low | IL | 0.02 | 5 | uA | VLOGIC=0.5V (Regulator ON) | 5 | |
| Input voltage | VIN | 3.6 | 45 | V | 4 | ||
| Operating junction temperature | TJ | -40 | 125 | ºC | 4 | ||
| Operating ambient temperature | TA | -40 | 85 | ºC | 4 | ||
| Input voltage | VIN | -0.3 | 45 | V | 4 | ||
| Feedback pin voltage | VFB | -0.3 | V | Upper limit printed as Vin+0.3 V (not numeric) | 4 | ||
| ON/OFF pin voltage | VEN | -0.3 | V | Upper limit printed as Vin+0.3 V (not numeric) | 4 | ||
| Output pin voltage | VSW | -0.3 | V | Upper limit printed as Vin+0.3 V (not numeric) | 4 | ||
| Operating junction temperature | TJ | 150 | ºC | 4 | |||
| Storage temperature | TSTG | -65 | 150 | ºC | 4 | ||
| Lead temperature (soldering, 10 sec) | TLEAD | 260 | ºC | Soldering, 10 sec | 4 | ||
| ESD (HBM) | 2000 | V | HBM | 4 | |||
| Thermal resistance junction to ambient | RθJA | 85 | ºC/W | Note1: thermal resistance with copper area of approximately 3 in2 | 5 | ||
| Thermal resistance junction to case | RθJC | 45 | ºC/W | 5 |
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 | this is the output (switch) pin, which should not have large areas of copper.) Large areas of copper provide the | 12 |
CAD (KiCad official)
- Symbol:
TD1509PR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
td1509pr-etched.step/td1509pr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);td1509pr.step/td1509pr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Techcode Semicon datasheet (17 pp, sha256
8d1cdb542e62ec93, 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).