component
UCC28950PW
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TSSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ucc28950pw: specified limits as data (metadata.characteristics, 50 rows from the datasheet)
2 files changed
+665−1
README.md+57@@ -42,6 +42,63 @@ UCC28950PW from Texas Instruments, in a TSSOP-24. Pinout and pin descriptions ex | Category | Power Management (PMIC) | | Pins | 24 | +## 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 supply voltage, VDD | VDD | -0.4 | | 20 | V | | 4 |+| Output voltage on OUTA, OUTB, OUTC, OUTD, OUTE, OUTF (max printed as VDD + 0.4 V) | | -0.4 | | | V | | 4 |+| Input voltage on DELAB, DELCD, DELEF, SS/EN, DCM, TMIN, RT, SYNC, RSUM, EA+, EA-, COMP, CS, ADEL, ADELEF (max printed as VREF + 0.4 V) | | -0.4 | | | V | | 4 |+| Output voltage on VREF | VREF | -0.4 | | 5.6 | V | | 4 |+| Operating virtual junction temperature | TJ | -40 | | 150 | °C | | 4 |+| Operating ambient temperature | TA | -40 | | 125 | °C | | 4 |+| Lead temperature (soldering, 10 s) | | | | 300 | °C | soldering, 10 s | 4 |+| Storage temperature | Tstg | -65 | | 150 | °C | | 4 |+| Electrostatic discharge, human body model (HBM) | V(ESD) | -2000 | | 2000 | V | per ANSI/ESDA/JEDEC JS-001 | 4 |+| Electrostatic discharge, charged device model (CDM) | V(ESD) | -500 | | 500 | V | per JEDEC JESD22-C101 | 4 |+| Supply voltage, VDD | VDD | 8 | 12 | 17 | V | | 4 |+| Operating junction temperature | TJ | -40 | | 125 | °C | | 4 |+| Converter switching frequency setting | FSW(nom) | 50 | | 1000 | kHz | | 4 |+| Programmable delay between OUTA, OUTB and OUTC, OUTD set by resistors DELAB and DELCD and parameter KA | | 30 | | 1000 | ns | | 4 |+| Maximum duty cycle, UCC28950 (DMAX) | DMAX | | | 90 | % | | 4 |+| Programmable delay between OUTA, OUTF and OUTB, OUTE set by resistor DELEF and parameter KEF | | 30 | | 1400 | ns | | 4 |+| Programmable DCM as percentage of voltage at CS | | 5 | | 30 | % | | 4 |+| Programmable TMIN | | 100 | | 800 | ns | | 4 |+| UVLO start threshold | UVLO_RTH | 6.75 | | 7.9 | V | | 6 |+| UVLO minimum operating voltage after start | UVLO_FTH | 6.15 | | 7.2 | V | | 6 |+| UVLO hysteresis | UVLO_HYST | 0.53 | | 0.75 | V | | 6 |+| Startup current | IDD(off) | | | 270 | µA | VDD = 5.2V | 6 |+| Operating supply current | IDD | | | 10 | mA | | 6 |+| VREF total output range | VREF | 4.925 | | 5.075 | V | 0 ≤ IR ≤ 20mA, 8V ≤ VDD ≤ 17V | 6 |+| Short circuit current | ISCC | -53 | | -23 | mA | VREF = 0V | 6 |+| Switching frequency FSW(nom), total range | FSW(nom) | 92 | | 108 | kHz | | 6 |+| Maximum duty cycle | DMAX | | | 97 | % | | 6 |+| Synchronization phase, total range | PHSYNC | 85 | | 95 | °PH | RT = 59kΩ between RT and GND, Input pulses 200kHz, D = 0.5 at SYNC | 6 |+| Synchronization frequency, total range | FSYNC | 180 | | 220 | kHz | RT = 59kΩ between RT and 5V; –40 °C ≤ TJ ≤ 125°C | 6 |+| Synchronization pulse width | TPW | 2.2 | | 2.8 | µs | | 6 |+| Error amplifier common-mode input voltage range | VICM | 0.5 | | 3.6 | V | VICM range ensures parameters; functionality ensured for 3.6V < VICM < VREF + 0.4V, and –0.4V < VICM < 0.5V | 7 |+| Error amplifier offset voltage | VIO | -7 | | 7 | mV | | 7 |+| Error amplifier input bias current | IBIAS | -1 | | 1 | µA | | 7 |+| Error amplifier high-level output voltage | EAHIGH | 3.9 | | | V | V(EA+) – V(EA–) = 500mV, IEAOUT = –0.5mA | 7 |+| Error amplifier low-level output voltage | EALOW | | | 0.35 | V | V(EA+) – V(EA–) = –500mV, IEAOUT = 0.5mA | 7 |+| Error amplifier source current | ISOURCE | -8 | | -0.5 | mA | | 7 |+| Error amplifier sink current | ISINK | 2.7 | | 5.75 | mA | | 7 |+| CS pin cycle-by-cycle threshold | VCS_LIM | 1.94 | | 2.06 | V | | 7 |+| Discharge current to set cycle-by-cycle current limit duration | IDS | 15 | | 25 | µA | VCS = 2.5V, VVSS = 4V | 7 |+| Hiccup OFF time threshold | VHCC | 3.2 | | 4.2 | V | | 7 |+| Discharge current to set hiccup mode OFF time | IHCC | 1.9 | | 3.2 | µA | | 7 |+| Soft-start charge current | ISS | 20 | | 30 | µA | VSS = 0V | 7 |+| Shutdown, restart threshold | VSS_STD | 0.25 | | 0.7 | V | | 7 |+| Pullup threshold | VSS_PU | 3.3 | | 4.3 | V | | 7 |+| Clamp voltage | VSS_CL | 4.2 | | 4.95 | V | | 7 |+| Junction-to-ambient thermal resistance (PW, 24 pins) | RθJA | | 93.3 | | °C/W | | 5 |+| Junction-to-case (top) thermal resistance (PW, 24 pins) | RθJC(top) | | 24.2 | | °C/W | | 5 |+| Junction-to-board thermal resistance (PW, 24 pins) | RθJB | | 47.9 | | °C/W | | 5 |+| Junction-to-top characterization parameter (PW, 24 pins) | ψJT | | 0.7 | | °C/W | | 5 |+| Junction-to-board characterization parameter (PW, 24 pins) | ψJB | | 47.4 | | °C/W | | 5 |+ ## CAD (KiCad official) - Symbol: `UCC28950PW`
page.json+608−1@@ -275,6 +275,613 @@ "Package": "TSSOP-24", "Category": "Power Management (PMIC)", "Pins": "24"+ },+ "characteristics": {+ "version": 1,+ "source": "datasheet",+ "datasheet_sha256": "a765d09f25ef27f8",+ "rows": [+ {+ "name": "Input supply voltage, VDD",+ "symbol": "VDD",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -0.4,+ "typ": null,+ "max": 20,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Output voltage on OUTA, OUTB, OUTC, OUTD, OUTE, OUTF (max printed as VDD + 0.4 V)",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -0.4,+ "typ": null,+ "max": null,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Input voltage on DELAB, DELCD, DELEF, SS/EN, DCM, TMIN, RT, SYNC, RSUM, EA+, EA-, COMP, CS, ADEL, ADELEF (max printed as VREF + 0.4 V)",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -0.4,+ "typ": null,+ "max": null,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Output voltage on VREF",+ "symbol": "VREF",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -0.4,+ "typ": null,+ "max": 5.6,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Operating virtual junction temperature",+ "symbol": "TJ",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -40,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Operating ambient temperature",+ "symbol": "TA",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -40,+ "typ": null,+ "max": 125,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Lead temperature (soldering, 10 s)",+ "symbol": "",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": null,+ "typ": null,+ "max": 300,+ "conditions": "soldering, 10 s",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Storage temperature",+ "symbol": "Tstg",+ "kind": "absolute_maximum",+ "unit": "°C",+ "min": -65,+ "typ": null,+ "max": 150,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Electrostatic discharge, human body model (HBM)",+ "symbol": "V(ESD)",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -2000,+ "typ": null,+ "max": 2000,+ "conditions": "per ANSI/ESDA/JEDEC JS-001",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Electrostatic discharge, charged device model (CDM)",+ "symbol": "V(ESD)",+ "kind": "absolute_maximum",+ "unit": "V",+ "min": -500,+ "typ": null,+ "max": 500,+ "conditions": "per JEDEC JESD22-C101",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Supply voltage, VDD",+ "symbol": "VDD",+ "kind": "recommended_operating",+ "unit": "V",+ "min": 8,+ "typ": 12,+ "max": 17,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Operating junction temperature",+ "symbol": "TJ",+ "kind": "recommended_operating",+ "unit": "°C",+ "min": -40,+ "typ": null,+ "max": 125,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Converter switching frequency setting",+ "symbol": "FSW(nom)",+ "kind": "recommended_operating",+ "unit": "kHz",+ "min": 50,+ "typ": null,+ "max": 1000,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Programmable delay between OUTA, OUTB and OUTC, OUTD set by resistors DELAB and DELCD and parameter KA",+ "symbol": "",+ "kind": "recommended_operating",+ "unit": "ns",+ "min": 30,+ "typ": null,+ "max": 1000,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Maximum duty cycle, UCC28950 (DMAX)",+ "symbol": "DMAX",+ "kind": "recommended_operating",+ "unit": "%",+ "min": null,+ "typ": null,+ "max": 90,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Programmable delay between OUTA, OUTF and OUTB, OUTE set by resistor DELEF and parameter KEF",+ "symbol": "",+ "kind": "recommended_operating",+ "unit": "ns",+ "min": 30,+ "typ": null,+ "max": 1400,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Programmable DCM as percentage of voltage at CS",+ "symbol": "",+ "kind": "recommended_operating",+ "unit": "%",+ "min": 5,+ "typ": null,+ "max": 30,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "Programmable TMIN",+ "symbol": "",+ "kind": "recommended_operating",+ "unit": "ns",+ "min": 100,+ "typ": null,+ "max": 800,+ "conditions": "",+ "source_page": 4,+ "source": "datasheet"+ },+ {+ "name": "UVLO start threshold",+ "symbol": "UVLO_RTH",+ "kind": "electrical",+ "unit": "V",+ "min": 6.75,+ "typ": null,+ "max": 7.9,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "UVLO minimum operating voltage after start",+ "symbol": "UVLO_FTH",+ "kind": "electrical",+ "unit": "V",+ "min": 6.15,+ "typ": null,+ "max": 7.2,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "UVLO hysteresis",+ "symbol": "UVLO_HYST",+ "kind": "electrical",+ "unit": "V",+ "min": 0.53,+ "typ": null,+ "max": 0.75,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Startup current",+ "symbol": "IDD(off)",+ "kind": "electrical",+ "unit": "µA",+ "min": null,+ "typ": null,+ "max": 270,+ "conditions": "VDD = 5.2V",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Operating supply current",+ "symbol": "IDD",+ "kind": "electrical",+ "unit": "mA",+ "min": null,+ "typ": null,+ "max": 10,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "VREF total output range",+ "symbol": "VREF",+ "kind": "electrical",+ "unit": "V",+ "min": 4.925,+ "typ": null,+ "max": 5.075,+ "conditions": "0 ≤ IR ≤ 20mA, 8V ≤ VDD ≤ 17V",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Short circuit current",+ "symbol": "ISCC",+ "kind": "electrical",+ "unit": "mA",+ "min": -53,+ "typ": null,+ "max": -23,+ "conditions": "VREF = 0V",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Switching frequency FSW(nom), total range",+ "symbol": "FSW(nom)",+ "kind": "electrical",+ "unit": "kHz",+ "min": 92,+ "typ": null,+ "max": 108,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Maximum duty cycle",+ "symbol": "DMAX",+ "kind": "electrical",+ "unit": "%",+ "min": null,+ "typ": null,+ "max": 97,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Synchronization phase, total range",+ "symbol": "PHSYNC",+ "kind": "electrical",+ "unit": "°PH",+ "min": 85,+ "typ": null,+ "max": 95,+ "conditions": "RT = 59kΩ between RT and GND, Input pulses 200kHz, D = 0.5 at SYNC",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Synchronization frequency, total range",+ "symbol": "FSYNC",+ "kind": "electrical",+ "unit": "kHz",+ "min": 180,+ "typ": null,+ "max": 220,+ "conditions": "RT = 59kΩ between RT and 5V; –40 °C ≤ TJ ≤ 125°C",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Synchronization pulse width",+ "symbol": "TPW",+ "kind": "electrical",+ "unit": "µs",+ "min": 2.2,+ "typ": null,+ "max": 2.8,+ "conditions": "",+ "source_page": 6,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier common-mode input voltage range",+ "symbol": "VICM",+ "kind": "electrical",+ "unit": "V",+ "min": 0.5,+ "typ": null,+ "max": 3.6,+ "conditions": "VICM range ensures parameters; functionality ensured for 3.6V < VICM < VREF + 0.4V, and –0.4V < VICM < 0.5V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier offset voltage",+ "symbol": "VIO",+ "kind": "electrical",+ "unit": "mV",+ "min": -7,+ "typ": null,+ "max": 7,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier input bias current",+ "symbol": "IBIAS",+ "kind": "electrical",+ "unit": "µA",+ "min": -1,+ "typ": null,+ "max": 1,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier high-level output voltage",+ "symbol": "EAHIGH",+ "kind": "electrical",+ "unit": "V",+ "min": 3.9,+ "typ": null,+ "max": null,+ "conditions": "V(EA+) – V(EA–) = 500mV, IEAOUT = –0.5mA",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier low-level output voltage",+ "symbol": "EALOW",+ "kind": "electrical",+ "unit": "V",+ "min": null,+ "typ": null,+ "max": 0.35,+ "conditions": "V(EA+) – V(EA–) = –500mV, IEAOUT = 0.5mA",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier source current",+ "symbol": "ISOURCE",+ "kind": "electrical",+ "unit": "mA",+ "min": -8,+ "typ": null,+ "max": -0.5,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Error amplifier sink current",+ "symbol": "ISINK",+ "kind": "electrical",+ "unit": "mA",+ "min": 2.7,+ "typ": null,+ "max": 5.75,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "CS pin cycle-by-cycle threshold",+ "symbol": "VCS_LIM",+ "kind": "electrical",+ "unit": "V",+ "min": 1.94,+ "typ": null,+ "max": 2.06,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Discharge current to set cycle-by-cycle current limit duration",+ "symbol": "IDS",+ "kind": "electrical",+ "unit": "µA",+ "min": 15,+ "typ": null,+ "max": 25,+ "conditions": "VCS = 2.5V, VVSS = 4V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Hiccup OFF time threshold",+ "symbol": "VHCC",+ "kind": "electrical",+ "unit": "V",+ "min": 3.2,+ "typ": null,+ "max": 4.2,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Discharge current to set hiccup mode OFF time",+ "symbol": "IHCC",+ "kind": "electrical",+ "unit": "µA",+ "min": 1.9,+ "typ": null,+ "max": 3.2,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Soft-start charge current",+ "symbol": "ISS",+ "kind": "electrical",+ "unit": "µA",+ "min": 20,+ "typ": null,+ "max": 30,+ "conditions": "VSS = 0V",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Shutdown, restart threshold",+ "symbol": "VSS_STD",+ "kind": "electrical",+ "unit": "V",+ "min": 0.25,+ "typ": null,+ "max": 0.7,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Pullup threshold",+ "symbol": "VSS_PU",+ "kind": "electrical",+ "unit": "V",+ "min": 3.3,+ "typ": null,+ "max": 4.3,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Clamp voltage",+ "symbol": "VSS_CL",+ "kind": "electrical",+ "unit": "V",+ "min": 4.2,+ "typ": null,+ "max": 4.95,+ "conditions": "",+ "source_page": 7,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-ambient thermal resistance (PW, 24 pins)",+ "symbol": "RθJA",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 93.3,+ "max": null,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-case (top) thermal resistance (PW, 24 pins)",+ "symbol": "RθJC(top)",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 24.2,+ "max": null,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-board thermal resistance (PW, 24 pins)",+ "symbol": "RθJB",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 47.9,+ "max": null,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-top characterization parameter (PW, 24 pins)",+ "symbol": "ψJT",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 0.7,+ "max": null,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ },+ {+ "name": "Junction-to-board characterization parameter (PW, 24 pins)",+ "symbol": "ψJB",+ "kind": "thermal",+ "unit": "°C/W",+ "min": null,+ "typ": 47.4,+ "max": null,+ "conditions": "",+ "source_page": 5,+ "source": "datasheet"+ }+ ] } }, "variants": [],@@ -316,4 +923,4 @@ "visibility": { "public": true }-}+}