component
TD1501SADJ
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Techcode Semicon DC-DC Converters, TO-263-5. 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
markdownTD1501SADJ
Techcode Semicon · DC-DC Converters · TO-263-5
TD1501SADJ from Techcode Semicon, in a TO-263-5. 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; a suitable input bypass capacitor must be present at this pin to minimize voltage transients and supply the regulator's switching currents, with input voltage specified at 3.6 V to 45 V. |
| 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 its PCB copper area should be kept to a minimum to limit coupling to sensitive circuitry. |
| 3 | GND | power_in | Circuit ground, which should be connected to a ground plane together with the input and output capacitors. |
| 4 | FB | input | Senses the regulated output voltage to close the feedback loop; on the ADJ version it is fed from a resistive divider so that VOUT = 1.235 × (R1 + R2) / R1. |
| 5 | ON/OFF | input | Logic-level shutdown input in which pulling the pin 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; leaving it open or tying it to ground keeps the regulator on. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Techcode Semicon |
| Package | TO-263-5 |
| Category | Power Management ICs |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage | VIN | -0.3 | 45 | V | 4 | ||
| Feedback Pin Voltage | VFB | -0.3 | V | Max printed as Vin+0.3 V | 4 | ||
| ON/OFF Pin Voltage | VEN | -0.3 | V | Max printed as Vin+0.3 V | 4 | ||
| Output Pin Voltage | VSW | -0.3 | V | Max printed as Vin+0.3 V | 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 | |||
| Input Voltage | VIN | 3.6 | 45 | V | 4 | ||
| Operating Junction Temperature | TJ | -40 | 125 | ºC | 4 | ||
| Operating Ambient Temperature | TA | -40 | 85 | ºC | 4 | ||
| Output Voltage (ADJ), pair value 1 | VOUT | 1.193 | 1.23 | 1.267 | V | 11V≤VIN ≤ 45V, 0.2A ≤ ILOAD≤3A, VOUT for 9V | 6 |
| Output Voltage (ADJ), pair value 2 | VOUT | 1.18 | 1.23 | 1.28 | V | 11V≤VIN ≤ 45V, 0.2A ≤ ILOAD≤3A, VOUT for 9V | 6 |
| Feedback bias current, value 1 | Ib | 10 | 50 | nA | Adjustable only, VFB=1.3V | 5 | |
| Feedback bias current, value 2 | 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, value 1 | ISTBY | 80 | 200 | uA | ON/OFF=5V, VIN=36V | 5 | |
| Standby quiescent current, value 2 | ISTBY | 80 | 250 | uA | ON/OFF=5V, VIN=36V | 5 | |
| Oscillator frequency | FOSC | 127 | 150 | 173 | KHz | 5 | |
| Saturation voltage, value 1 | VSAT | 1.2 | 1.4 | V | IOUT=3A | 5 | |
| Saturation voltage, value 2 | VSAT | 1.2 | 1.5 | V | IOUT=3A | 5 | |
| Current Limit, value 1 | ICL | 4.5 | 5.5 | A | Peak Current (VFB=0V) | 5 | |
| Current Limit, value 2 | ICL | 4.5 | 6.5 | 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 logic input threshold voltage, low | VIL | 0.6 | V | Low (Regulator ON) | 5 | ||
| ON/OFF pin logic input threshold voltage, high | VIH | 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 | |
| Thermal Resistance Junction to Case | θJC | 3.5 | OC/W | TO263-5L | 5 | ||
| Thermal Resistance Junction to Ambient | θJA | 23 | OC/W | TO263-5L; Note1: copper area approximately 3 in2 | 5 | ||
| Thermal Resistance-Junction to Ambient | RθJA | 23 | ºC / W | 4 | |||
| Thermal Resistance-Junction to Case | RθJC | 3.5 | ºC / W | 4 | |||
| Efficiency | η | 88 | % | VIN=12V, VOUT=9V, ILOAD=3A | 6 |
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:
TD1501SADJ - Footprint:
Package_TO_SOT_SMD:TO-263-5_TabPin6 - 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files:
td1501sadj-etched.step/td1501sadj-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);td1501sadj.step/td1501sadj.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Techcode Semicon datasheet (18 pp, sha256
c0e40074baddb703, retrieved 2026-11-05, 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).