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MIC38C43YM-TR

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Microchip Tech DC-DC Controllers, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MIC38C43YM-TR

Microchip Tech · DC-DC Controllers · SOIC-8

MIC38C43YM-TR from Microchip Tech, in a SOIC-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 COMP output Compensation: connect external compensation network to modify the error amplifier output.
2 FB input Feedback input to the error amplifier; feedback is 2.5V at the desired output voltage.
3 ISNS input Current sense comparator input; connect to a current sensing resistor or current transformer.
4 RT/CT passive Timing resistor/timing capacitor: connect external RC network to select switching frequency.
5 GND power_in Combined analog and power ground.
6 OUT output Gate driver totem-pole output with rail-to-rail swing, 0.5A maximum output current.
7 VDD power_in Analog supply input for controller circuitry and output stage, 20V maximum.
8 VREF power_out 5V reference output; connect external RC network.

Key specifications

Parameter Value
Manufacturer Microchip Tech
Package SOIC-8
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
Output Voltage VREF 4.9 5 5.1 V TA = +25°C, IVREF = 1 mA 4
Line Regulation ΔVREF(LINE) 2 20 mV 12V ≤ VDD ≤ 18V, IVREF = 5 μA, Note 6 4
Load Regulation ΔVREF(LOAD) 1 25 mV 1 mA ≤ IVREF ≤ 20 mA 4
Total Output Variation ΔVREF(TOT) 4.82 5.18 V Line, Load, Temperature, Note 2 4
Long-Term Stability ΔVREF(LT) 5 25 mV TA = +125°C, 1000 hours, Note 2 4
Output Short-Circuit IVREF(SC) -30 -80 -180 mA 4
Oscillator Initial Accuracy ΔfOSC(INIT) 49 52 55 kHz TA = +25°C, Note 3 4
Oscillator Voltage Stability ΔfOSC(VS) 0.2 1 % 12V ≤ VDD ≤ 18V, Note 6 4
Clock Ramp Reset Current IDISCHG 6 8.4 9 mA TA = +25°C, VRT/CT = 2V 4
Clock Ramp Reset Current IDISCHG 6 8.4 9.5 mA TA = TMIN to TMAX 4
Error Amp Input Voltage VIN(EA) 2.42 2.5 2.58 V VCOMP = 2.5V 4
Error Amp Input Bias Current IBIAS(EA) -0.1 -2 µA VFB = 5.0V 4
Open Loop Voltage Gain AVOL 65 90 dB 2V ≤ VCOMP ≤ 4V 4
Unity Gain Bandwidth GBW 0.7 1 MHz Note 2 4
Error Amp PSRR PSRREA 60 dB 12V ≤ VDD ≤ 18V 4
COMP Output Sink Current ICOMP(SINK) 2 14 mA VFB = 2.7V, VCOMP = 1.1V 4
COMP Output Source Current ICOMP(SRC) -0.5 -1 mA VFB = 2.3V, VCOMP = 5V 4
COMP High Voltage VCOMP_H 5 6.8 V VFB = 2.3V, RLOAD = 15 kΩ to ground 4
COMP Low Voltage VCOMP_L 0.1 1.1 V VFB = 2.7V, RLOAD = 15 kΩ to VREF 4
Current Sense Divider Gain ADIV 2.85 3 3.15 V/V Note 4, Note 5 4
Current Sense Maximum Threshold VTH(MAX) 0.9 1 1.1 V VCOMP = 5V, Note 4 4
Current Sense Input Bias Current IBIAS(CS) -0.1 -2 µA 4
Delay to Output tD 120 250 ns 4
Rise Time tR 40 80 ns TA = +25°C, CLOAD = 1 nF 4
Fall Time tF 30 60 ns TA = +25°C, CLOAD = 1 nF 4
Start Threshold VTH(ST) 7.8 8.4 9 V MIC38C43/45 5
Minimum Operating Voltage VDD(MIN) 7 7.6 8.2 V MIC38C43/45 5
Maximum Duty Cycle DMAX 94 96 % MIC38C42/43 5
Minimum Duty Cycle DMIN 0 % 5
Start-Up Current IDD(START) 50 200 µA VDD = 7.5V for MIC38C43/45 5
Operating Supply Current IDD(Q) 4 6 mA VFB = VISNS = 0V 5
Zener Voltage at VDD Pin VZ 30 37 V IDD = 25 mA, Note 6 5
Zener Current (VDD pin) IZ 30 mA 3
Supply Voltage VDD 20 V Note 1 3
Switch Supply Voltage VD 20 V 3
Current Sense Voltage VISNS -0.3 5.5 V 3
Feedback Voltage VFB -0.3 5.5 V 3
Output Current IOUT 0.5 A 3
Storage Temperature Range TS -65 150 °C 6
Operating Ambient Temperature Range TA -40 85 °C 6
Operating Junction Temperature Range TJ -40 125 °C 6
Maximum Junction Temperature TJ(MAX) 150 °C 6
Thermal Resistance 8-Ld SOIC θJA 170 °C/W 6
Reference Temperature Stability TCVREF 0.2 mV/°C Note 2 4
Oscillator Temperature Stability TCFOSC 0.04 %/°C TMIN ≤ TA ≤ TMAX, Note 2 4
Output Noise Voltage VNOISE 50 µV 10 Hz ≤ f ≤ 10 kHz, TA = +25°C, Note 2 4
RDS(ON) Pull High RDSON_H 20 Ω ISOURCE = 200 mA 4
RDS(ON) Pull Low RDSON_L 11 Ω ISINK = 200 mA 4

CAD (KiCad official)

  • Symbol: MIC38C43YM-TR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: mic38c43ym-tr-etched.step / mic38c43ym-tr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mic38c43ym-tr.step / mic38c43ym-tr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Microchip Tech datasheet (24 pp, sha256 73c8031622326521, retrieved 2026-10-27, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-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).

Datasheet PDF