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ZXCT1110QW5-7
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Diodes Incorporated Current Source/Constant Current Source, SOT-25. 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
markdownZXCT1110QW5-7
Diodes Incorporated · Current Source/Constant Current Source · SOT-25
ZXCT1110QW5-7 from Diodes Incorporated, in a SOT-25. 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 | NC | unconnected | No connection. |
| 2 | GND | power_in | Ground pin and substrate connection. |
| 3 | OUT | output | Current output pin; output voltage range is 0 to VS- - 1V for the ZXCT1110Q and the output is limited to -0.3V to VS+ relative to GND. |
| 4 | S+ | power_in | Positive input of the current monitor with 2.5V to 36V common-mode range that also supplies the internal circuitry (absolute maximum 40V relative to GND). |
| 5 | S- | input | Negative input of the current monitor with 2.5V to 36V common-mode input range (absolute maximum 40V relative to GND). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-25 |
| Category | Power Supply Chip |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| S- Input Current | IS- | 19 | 100 | nA | TA=+25°C, VS+=20V, VSENSE=0V | 4 | |
| GND Pin Current | IQ | 3 | 5 | µA | VSENSE=0V, TA=+25°C | 4 | |
| Common-Mode Sense Rejection | CMSR | 0.1 | 0.4 | µA/V | VS+=2.5V to 36V, TA=+25°C | 4 | |
| Output Offset Current | IOO | -4 | 0 | 4 | µA | VSENSE=10mV, TA=+25°C | 4 |
| Transconductance | GT | 3.928 | 4 | 4.072 | mA/V | VSENSE=10mV to 150mV, TA=+25°C | 4 |
| Transconductance Error | GE | -1.8 | 1.8 | % | VSENSE=10mV to 150mV, TA=+25°C | 4 | |
| Output Relative to VS- | VOUTH | -1 | -0.78 | V | TA=+25°C | 4 | |
| Transconductance Temp. Co. | GT-TC | 265 | ppm/°C | TA=+25°C | 4 | ||
| Small Signal Bandwidth -3dB | BW | 0.65 | MHz | VSENSE(AC)=10mVPP, RGAIN=2.5kΩ, TA=+25°C | 4 | ||
| GND Pin Current | IQ | 2.2 | µA | VSENSE=0V, TA=-40°C | 4 | ||
| GND Pin Current | IQ | 5.8 | µA | VSENSE=0V, TA=+125°C | 4 | ||
| Common-Mode Input Range | VS+ | 2.5 | 36 | V | ZXCT1110Q | 3 | |
| Differential Sense Input Voltage Range | VSENSE | 0 | 0.5 | V | VS+ - VS- | 3 | |
| Output Voltage Range | VOUT | 0 | V | ZXCT1110Q, 0 ≤ VSENSE ≤ 100mV, max = VS- - 1 | 3 | ||
| Ambient Temperature Range | TA | -40 | 125 | °C | 3 | ||
| Voltage on S- and S+ relative to GND | -0.3 | 40 | V | ZXCT1110Q | 2 | ||
| Voltage on OUT to GND | -0.3 | V | ZXCT1110Q, max = VS+ | 2 | |||
| Differential Sense Voltage | VSENSE | -0.3 | 0.8 | V | VSENSE = VS+ - VS- | 2 | |
| Maximum Current into S+ and S- | -8.5 | 8.5 | mA | 2 | |||
| Storage Temperature | -55 | 150 | °C | 2 | |||
| Maximum Junction Temperature | 150 | °C | 2 | ||||
| Package Power Dissipation SOT25 | 300 | mW | TA=+25°C, derate to zero at +150°C | 2 | |||
| ESD HBM | 1000 | V | ZXCT1110Q | 2 | |||
| ESD MM | 150 | V | ZXCT1110Q | 2 | |||
| ESD CDM | 1000 | V | ZXCT1110Q | 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 | and the traces from the S+ and S- pins must be connected only to the resistor pads. In this way, the effect of the copper is minimized. | 13 |
CAD (KiCad official)
- Symbol:
ZXCT1110QW5-7 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-25 (KiCad packages3D, STEP)
- 3D model files:
zxct1110qw5-7-etched.step/zxct1110qw5-7-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);zxct1110qw5-7.step/zxct1110qw5-7.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (17 pp, sha256
2cb7ab2b620ef322, retrieved 2026-10-22, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).