component
UCC38C42DGKR
Public Made by Adomby adom
Texas Instruments DC-DC Controllers, VSSOP-8-0.65mm. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ucc38c42dgkr: specified limits as data (metadata.characteristics, 55 rows from the datasheet)
2 files changed
+730−1
README.md+62@@ -26,6 +26,68 @@ UCC38C42DGKR from Texas Instruments, in a VSSOP-8-0.65mm. Pinout and pin descrip | Category | Power Supply Chip | | 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 |+|---|---|---|---|---|---|---|---|+| VREF voltage, initial accuracy | VVREF | 4.9 | 5 | 5.1 | V | TJ = 25°C, IOUT = 1mA | 7 |+| VREF line regulation | | | 0.2 | 20 | mV | VVDD = 12V to 18V | 7 |+| VREF load regulation | | | 3 | 25 | mV | 1mA to 20mA | 7 |+| VREF temperature stability | | | 0.2 | 0.4 | mV/°C | See (2) | 7 |+| VREF total output variation | | 4.82 | | 5.18 | V | See (2) | 7 |+| VREF long term stability | | | 5 | 25 | mV | 1000 hours, TJ = 125°C, see (2) | 7 |+| VREF output short circuit (source current) | IVREF | 30 | 45 | 55 | mA | | 7 |+| Oscillator initial accuracy | fOSC | 50.5 | 53 | 55 | kHz | TJ = 25°C, see (3) | 7 |+| Oscillator voltage stability | | | 0.2 | 1 | % | 12V ≤ VVDD ≤ 18V | 7 |+| Oscillator temperature stability | | | 1 | 2.5 | % | TJ(MIN) to TJ(MAX), see (2) | 7 |+| Oscillator discharge current | | 7.7 | 8.4 | 9 | mA | TJ = 25°C, VRT/CT = 2V, see (4) | 7 |+| Oscillator discharge current | | 7.2 | 8.4 | 9.5 | mA | VRT/CT = 2V, see (4) | 7 |+| Feedback input voltage, initial accuracy | VFB | 2.475 | 2.5 | 2.525 | V | VCOMP = 2.5V, TJ = 25°C | 7 |+| Feedback input voltage, total variation | VFB | 2.45 | 2.5 | 2.55 | V | VCOMP = 2.5V | 7 |+| Input bias current (source current) | IFB | | 0.1 | 2 | µA | VFB = 5V | 7 |+| Open-loop voltage gain | AVOL | 65 | 90 | | dB | 2V ≤ VOUT ≤ 4V | 7 |+| Unity gain bandwidth | | | 1 | 1.5 | MHz | See (2) | 7 |+| Output sink current | | | 2 | 14 | mA | VFB = 2.7V, VCOMP = 1.1V | 7 |+| Output source current | | | 0.5 | 1 | mA | VFB = 2.3V, VCOMP = 5V | 7 |+| Low-level COMP voltage | VOL | | 0.1 | 1.1 | V | VFB = 2.7V, RCOMP = 15kΩ COMP to VREF | 7 |+| Current sense gain | ACS | 2.85 | 3 | 3.15 | V/V | See (5) (6) | 8 |+| Maximum input signal (current sense) | VCS | 0.9 | 1 | 1.1 | V | VFB < 2.4V | 8 |+| Current sense input bias current (source current) | ICS | | 0.1 | 2 | µA | | 8 |+| CS to output delay | tD | | 35 | 70 | ns | | 8 |+| RDS(on) pulldown | VOUT(low) | | 5.5 | 15 | Ω | ISINK = 200mA | 8 |+| RDS(on) pullup | VOUT(high) | | 10 | 25 | Ω | ISOURCE = 200mA | 8 |+| Output rise time | tRISE | | 25 | 50 | ns | TJ = 25°C, COUT = 1nF | 8 |+| Output fall time | tFALL | | 20 | 40 | ns | TJ = 25°C, COUT = 1nF | 8 |+| UVLO start threshold | VDDON | 13.5 | 14.5 | 15.5 | V | UCCx8C42, UCCx8C44 | 8 |+| UVLO minimum operating voltage | VDDOFF | 8 | 9 | 10 | V | UCCx8C42, UCCx8C44 | 8 |+| Maximum duty cycle | DMAX | | 94 | 96 | % | UCCx8C42, UCCx8C43, UCCx8C40, VFB < 2.4 V | 8 |+| Start-up current | ISTART-UP | | 50 | 100 | µA | VVDD = VDDON – 0.5V | 8 |+| Operating supply current | IVDD | | 2.3 | 3 | mA | VFB = VCS = 0V | 8 |+| Input voltage VDD | VVDD | | | 20 | V | | 5 |+| Input current | IVDD | | | 30 | mA | | 5 |+| Output drive current (peak) | | -1 | | 1 | A | | 5 |+| Output energy (capacitive load) | EOUT | | | 5 | µJ | | 5 |+| Analog input voltage COMP, CS, FB, RT/CT | | -0.3 | | 6.3 | V | | 5 |+| Output driver voltage OUT | | -0.3 | | 20 | V | | 5 |+| Reference voltage VREF | VREF | | | 7 | V | | 5 |+| Error amplifier output sink current | | | | 10 | mA | COMP | 5 |+| Lead temperature (soldering, 10 s) | TLEAD | | | 300 | °C | 10 s | 5 |+| Operating junction temperature | TJ | -55 | | 150 | °C | | 5 |+| Storage temperature | Tstg | -65 | | 150 | °C | | 5 |+| Input voltage VDD | VVDD | | | 18 | V | | 6 |+| Output driver voltage | VOUT | | | 18 | V | | 6 |+| Maximum continuous voltage from external circuitry (VREF) | VREF | | | 5.5 | V | | 6 |+| Average output driver current (source and sink) | IOUT | | | 200 | mA | | 6 |+| Reference output current (source) | IOUT(VREF) | | | 20 | mA | | 6 |+| Operating junction temperature (UCC38C4x) | TJ | 0 | | 85 | °C | UCC38C4x | 6 |+| Junction-to-ambient thermal resistance (DGK) | RθJA | | 176.4 | | °C/W | | 7 |+| Junction-to-case (top) thermal resistance (DGK) | RθJC(top) | | 67.3 | | °C/W | | 7 |+| Junction-to-board thermal resistance (DGK) | RθJB | | 98.1 | | °C/W | | 7 |+| Junction-to-top characterization parameter (DGK) | ψJT | | 11.1 | | °C/W | | 7 |+| Junction-to-board characterization parameter (DGK) | ψJB | | 91.5 | | °C/W | | 7 |+ ## CAD (KiCad official) - Symbol: `UCC38C42DGKR`
page.json+668−1@@ -180,6 +180,673 @@ "Package": "VSSOP-8-0.65mm", "Category": "Power Supply Chip", "Pins": "8"+ },+ "characteristics": {+ "version": 1,+ "source": "datasheet",+ "datasheet_sha256": "9fa55f996731c56b",+ "rows": [+ {+ "name": "VREF voltage, initial accuracy",+ "symbol": "VVREF",+ "kind": "electrical",+ "unit": "V",+ "min": 4.9,+ "typ": 5,+ "max": 5.1,+ "conditions": "TJ = 25°C, IOUT = 1mA",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "VREF line regulation",+ "symbol": "",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": 0.2,+ "max": 20,+ "conditions": "VVDD = 12V to 18V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "VREF load regulation",+ "symbol": "",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": 3,+ "max": 25,+ "conditions": "1mA to 20mA",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "VREF temperature stability",+ "symbol": "",+ "kind": "temperature_coefficient",+ "unit": "mV/°C",+ "min": null,+ "typ": 0.2,+ "max": 0.4,+ "conditions": "See (2)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "VREF total output variation",+ "symbol": "",+ "kind": "electrical",+ "unit": "V",+ "min": 4.82,+ "typ": null,+ "max": 5.18,+ "conditions": "See (2)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "VREF long term stability",+ "symbol": "",+ "kind": "electrical",+ "unit": "mV",+ "min": null,+ "typ": 5,+ "max": 25,+ "conditions": "1000 hours, TJ = 125°C, see (2)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "VREF output short circuit (source current)",+ "symbol": "IVREF",+ "kind": "electrical",+ "unit": "mA",+ "min": 30,+ "typ": 45,+ "max": 55,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Oscillator initial accuracy",+ "symbol": "fOSC",+ "kind": "electrical",+ "unit": "kHz",+ "min": 50.5,+ "typ": 53,+ "max": 55,+ "conditions": "TJ = 25°C, see (3)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Oscillator voltage stability",+ "symbol": "",+ "kind": "voltage_coefficient",+ "unit": "%",+ "min": null,+ "typ": 0.2,+ "max": 1,+ "conditions": "12V ≤ VVDD ≤ 18V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Oscillator temperature stability",+ "symbol": "",+ "kind": "temperature_coefficient",+ "unit": "%",+ "min": null,+ "typ": 1,+ "max": 2.5,+ "conditions": "TJ(MIN) to TJ(MAX), see (2)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Oscillator discharge current",+ "symbol": "",+ "kind": "electrical",+ "unit": "mA",+ "min": 7.7,+ "typ": 8.4,+ "max": 9,+ "conditions": "TJ = 25°C, VRT/CT = 2V, see (4)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Oscillator discharge current",+ "symbol": "",+ "kind": "electrical",+ "unit": "mA",+ "min": 7.2,+ "typ": 8.4,+ "max": 9.5,+ "conditions": "VRT/CT = 2V, see (4)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Feedback input voltage, initial accuracy",+ "symbol": "VFB",+ "kind": "electrical",+ "unit": "V",+ "min": 2.475,+ "typ": 2.5,+ "max": 2.525,+ "conditions": "VCOMP = 2.5V, TJ = 25°C",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Feedback input voltage, total variation",+ "symbol": "VFB",+ "kind": "electrical",+ "unit": "V",+ "min": 2.45,+ "typ": 2.5,+ "max": 2.55,+ "conditions": "VCOMP = 2.5V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Input bias current (source current)",+ "symbol": "IFB",+ "kind": "electrical",+ "unit": "µA",+ "min": null,+ "typ": 0.1,+ "max": 2,+ "conditions": "VFB = 5V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Open-loop voltage gain",+ "symbol": "AVOL",+ "kind": "electrical",+ "unit": "dB",+ "min": 65,+ "typ": 90,+ "max": null,+ "conditions": "2V ≤ VOUT ≤ 4V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Unity gain bandwidth",+ "symbol": "",+ "kind": "electrical",+ "unit": "MHz",+ "min": null,+ "typ": 1,+ "max": 1.5,+ "conditions": "See (2)",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Output sink current",+ "symbol": "",+ "kind": "electrical",+ "unit": "mA",+ "min": null,+ "typ": 2,+ "max": 14,+ "conditions": "VFB = 2.7V, VCOMP = 1.1V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Output source current",+ "symbol": "",+ "kind": "electrical",+ "unit": "mA",+ "min": null,+ "typ": 0.5,+ "max": 1,+ "conditions": "VFB = 2.3V, VCOMP = 5V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Low-level COMP voltage",+ "symbol": "VOL",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": 0.1,+ "max": 1.1,+ "conditions": "VFB = 2.7V, RCOMP = 15kΩ COMP to VREF",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Current sense gain",+ "symbol": "ACS",+ "kind": "electrical",+ "unit": "V/V",+ "min": 2.85,+ "typ": 3,+ "max": 3.15,+ "conditions": "See (5) (6)",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Maximum input signal (current sense)",+ "symbol": "VCS",+ "kind": "electrical",+ "unit": "V",+ "min": 0.9,+ "typ": 1,+ "max": 1.1,+ "conditions": "VFB < 2.4V",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Current sense input bias current (source current)",+ "symbol": "ICS",+ "kind": "electrical",+ "unit": "µA",+ "min": null,+ "typ": 0.1,+ "max": 2,+ "conditions": "",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "CS to output delay",+ "symbol": "tD",+ "kind": "timing",+ "unit": "ns",+ "min": null,+ "typ": 35,+ "max": 70,+ "conditions": "",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "RDS(on) pulldown",+ "symbol": "VOUT(low)",+ "kind": "electrical",+ "unit": "Ω",+ "min": null,+ "typ": 5.5,+ "max": 15,+ "conditions": "ISINK = 200mA",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "RDS(on) pullup",+ "symbol": "VOUT(high)",+ "kind": "electrical",+ "unit": "Ω",+ "min": null,+ "typ": 10,+ "max": 25,+ "conditions": "ISOURCE = 200mA",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Output rise time",+ "symbol": "tRISE",+ "kind": "timing",+ "unit": "ns",+ "min": null,+ "typ": 25,+ "max": 50,+ "conditions": "TJ = 25°C, COUT = 1nF",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Output fall time",+ "symbol": "tFALL",+ "kind": "timing",+ "unit": "ns",+ "min": null,+ "typ": 20,+ "max": 40,+ "conditions": "TJ = 25°C, COUT = 1nF",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "UVLO start threshold",+ "symbol": "VDDON",+ "kind": "electrical",+ "unit": "V",+ "min": 13.5,+ "typ": 14.5,+ "max": 15.5,+ "conditions": "UCCx8C42, UCCx8C44",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "UVLO minimum operating voltage",+ "symbol": "VDDOFF",+ "kind": "electrical",+ "unit": "V",+ "min": 8,+ "typ": 9,+ "max": 10,+ "conditions": "UCCx8C42, UCCx8C44",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Maximum duty cycle",+ "symbol": "DMAX",+ "kind": "electrical",+ "unit": "%",+ "min": null,+ "typ": 94,+ "max": 96,+ "conditions": "UCCx8C42, UCCx8C43, UCCx8C40, VFB < 2.4 V",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Start-up current",+ "symbol": "ISTART-UP",+ "kind": "electrical",+ "unit": "µA",+ "min": null,+ "typ": 50,+ "max": 100,+ "conditions": "VVDD = VDDON – 0.5V",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Operating supply current",+ "symbol": "IVDD",+ "kind": "electrical",+ "unit": "mA",+ "min": null,+ "typ": 2.3,+ "max": 3,+ "conditions": "VFB = VCS = 0V",+ "source_page": 8,+ "source": "datasheet"+ },+ {+ "name": "Input voltage VDD",+ "symbol": "VVDD",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": 20,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Input current",+ "symbol": "IVDD",+ "kind": "absolute_maximum",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": 30,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Output drive current (peak)",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "A",+ "min": -1,+ "typ": null,+ "max": 1,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Output energy (capacitive load)",+ "symbol": "EOUT",+ "kind": "absolute_maximum",+ "unit": "µJ",+ "min": null,+ "typ": null,+ "max": 5,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Analog input voltage COMP, CS, FB, RT/CT",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -0.3,+ "typ": null,+ "max": 6.3,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Output driver voltage OUT",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -0.3,+ "typ": null,+ "max": 20,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Reference voltage VREF",+ "symbol": "VREF",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": 7,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier output sink current",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": 10,+ "conditions": "COMP",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Lead temperature (soldering, 10 s)",+ "symbol": "TLEAD",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": null,+ "typ": null,+ "max": 300,+ "conditions": "10 s",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Operating junction temperature",+ "symbol": "TJ",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -55,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Storage temperature",+ "symbol": "Tstg",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -65,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Input voltage VDD",+ "symbol": "VVDD",+ "kind": "recommended_operating",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": 18,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Output driver voltage",+ "symbol": "VOUT",+ "kind": "recommended_operating",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": 18,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Maximum continuous voltage from external circuitry (VREF)",+ "symbol": "VREF",+ "kind": "recommended_operating",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": 5.5,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Average output driver current (source and sink)",+ "symbol": "IOUT",+ "kind": "recommended_operating",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": 200,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Reference output current (source)",+ "symbol": "IOUT(VREF)",+ "kind": "recommended_operating",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": 20,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Operating junction temperature (UCC38C4x)",+ "symbol": "TJ",+ "kind": "recommended_operating",+ "unit": "°C",+ "min": 0,+ "typ": null,+ "max": 85,+ "conditions": "UCC38C4x",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-ambient thermal resistance (DGK)",+ "symbol": "RθJA",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 176.4,+ "max": null,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-case (top) thermal resistance (DGK)",+ "symbol": "RθJC(top)",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 67.3,+ "max": null,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-board thermal resistance (DGK)",+ "symbol": "RθJB",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 98.1,+ "max": null,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-top characterization parameter (DGK)",+ "symbol": "ψJT",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 11.1,+ "max": null,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-board characterization parameter (DGK)",+ "symbol": "ψJB",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 91.5,+ "max": null,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ }+ ] } }, "variants": [],@@ -221,4 +888,4 @@ "visibility": { "public": true }-}+}