component
AP3843CMTR-E1
Public Made by Adomby adom
Diodes Incorporated DC-DC Converters, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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AP3843CMTR-E1
Diodes Incorporated · DC-DC Converters · SOIC-8
AP3843CMTR-E1 from Diodes Incorporated, 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 | This pin is the Error Amplifier output and is made available for loop compensation. |
| 2 | VFB | input | The inverting input of the Error Amplifier, normally connected to the switching power supply output through a resistor divider. |
| 3 | ISENSE | input | A voltage proportional to inductor current is connected to this input, and the PWM uses it to terminate the output switch conduction. |
| 4 | RT/CT | passive | The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to VREF and capacitor CT to ground, with operation to 500 kHz possible. |
| 5 | GND | power_in | The combined control circuitry and power ground, to which all voltages are referenced. |
| 6 | OUTPUT | output | This output directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1.0 A. |
| 7 | VCC | power_in | The positive supply of the control IC. |
| 8 | VREF | power_out | This is the reference output, providing charging current for capacitor CT through resistor RT. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 30 | V | 5 | |||
| Output Current | IO | -1 | 1 | A | 5 | ||
| Analog Inputs | V(ANA) | -0.3 | 6.3 | V | 5 | ||
| Error Amp Output Sink Current | ISINK(E.A) | 10 | mA | 5 | |||
| Power Dissipation (SOIC-8) | PD | 460 | mW | TA<25 oC | 5 | ||
| Junction Operating Temperature | TJ | -40 | 150 | °C | 5 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 5 | ||
| Lead Temperature (Soldering, 10sec) | TLEAD | 300 | °C | 10 sec | 5 | ||
| ESD (Machine Model) | ESD | 250 | V | 5 | |||
| Thermal Resistance (Junction to Ambient) SOIC-8 | θJA | 160 | °C/W | 5 | |||
| Oscillation Frequency (recommended) | f | 500 | KHz | 5 | |||
| Ambient Temperature | TA | -40 | 85 | °C | 5 | ||
| Reference Output Voltage | VREF | 4.9 | 5 | 5.1 | V | TA=25oC, IREF=1mA | 6 |
| Total Output Variation (Line, Load, Temp.) | 4.82 | 5.18 | V | 6 | |||
| Line Regulation | ΔVREF | 4 | 15 | mV | 12V ≤ VCC ≤25V | 6 | |
| Load Regulation | ΔVREF | 4 | 15 | mV | 1mA ≤ IREF ≤20mA | 6 | |
| Short Circuit Output Current | ISC | -100 | -180 | mA | TA=25oC | 6 | |
| Temperature Stability (Reference) | 0.3 | mV/oC | 6 | ||||
| Oscillation Frequency | f | 47 | 52 | 57 | KHz | TA=25oC | 6 |
| Oscillator Amplitude | VOSC | 1.7 | V | Pin 4, peak to peak | 6 | ||
| Temperature Stability (Oscillator) | 2.5 | % | 6 | ||||
| Voltage Stability | 0.2 | 1 | % | 12V ≤ VCC ≤ 25V | 6 | ||
| Discharge Current | 8.5 | 9.5 | 10.5 | mA | Vpin 4 =2V (Note 7) | 6 | |
| Error Amp Input Voltage | VI | 2.45 | 2.5 | 2.55 | V | Vpin 1=2.5V | 6 |
| Error Amp Output Sink Current | ISINK | 5 | 8 | mA | Vpin1=1.1V | 6 | |
| Error Amp Output Source Current | ISOURCE | -0.5 | -0.8 | mA | Vpin1=5V | 6 | |
| Error Amp High Output Voltage | VOH | 5 | 7 | V | RL=15kΩ to GND | 6 | |
| Error Amp Low Output Voltage | VOL | 0.7 | 1.1 | V | RL=15kΩ to pin 8 | 6 | |
| Error Amp Voltage Gain | 65 | 90 | dB | 2V ≤ VO ≤ 4V | 6 | ||
| Error Amp Power Supply Rejection Ratio | PSRR | 60 | 70 | dB | 12V ≤ VCC ≤ 25V | 6 | |
| Maximum Input Signal | VI(MAX) | 0.9 | 1 | 1.1 | V | Vpin1=5V (Note 4) | 6 |
| Current Sense Gain | GV | 2.85 | 3 | 3.15 | V/V | (Note 4, 5) | 6 |
| Current Sense Power Supply Rejection Ratio | PSRR | 70 | dB | 12V≤ VCC≤ 25V (Note 4, 6) | 6 | ||
| Delay to Output | 150 | 300 | ns | Vpin3 = 0 to 2V (Note 6) | 6 | ||
| Input Bias Current | IBIAS | -3 | -10 | μA | 6 | ||
| Low Output Voltage (ISINK=20mA) | VOL | 0.1 | 0.4 | V | ISINK = 20mA | 6 | |
| Low Output Voltage (ISINK=200mA) | VOL | 1.4 | 2.2 | V | ISINK = 200mA | 6 | |
| High Output Voltage (ISOURCE=20mA) | VOH | 13 | 14 | V | ISOURCE = 20mA | 6 | |
| High Output Voltage (ISOURCE=200mA) | VOH | 12 | 13 | V | ISOURCE = 200mA | 6 | |
| Rise Time | tR | 50 | 150 | ns | TA=25oC, CL=1nF (Note 6) | 6 | |
| Fall Time | tF | 50 | 150 | ns | TA=25oC, CL=1nF (Note 6) | 6 | |
| UVLO Start Threshold (AP3843C/AP3845C) | VTH(ST) | 7.8 | 8.4 | 9 | V | AP3843C/AP3845C | 7 |
| UVLO Min. Operation Voltage after Turn On (AP3843C/AP3845C) | VOPR(Min.) | 7 | 7.6 | 8.2 | V | AP3843C/AP3845C | 7 |
| Max. Duty Cycle (AP3843C) | D(Max.) | 95 | 97 | 100 | % | AP3842C/AP3843C | 7 |
| Min. Duty Cycle | D(Min.) | 0 | % | 7 | |||
| Start-up Current (AP3843C) | IST | 50 | 80 | μA | AP3843C/AP3845C, VCC=6.5V | 7 | |
| Operating Supply Current | ICC(OPR) | 8 | 12 | mA | Vpin3=Vpin2=0V | 7 | |
| Zener Voltage | VZ | 30 | 34 | V | ICC=25mA | 7 | |
| Shutdown Temperature | TSHUT | 155 | °C | (Note 6) | 7 | ||
| Temperature Hysteresis | THYS | 25 | °C | (Note 6) | 7 |
CAD (KiCad official)
- Symbol:
AP3843CMTR-E1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ap3843cmtr-e1-etched.step/ap3843cmtr-e1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ap3843cmtr-e1.step/ap3843cmtr-e1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Diodes Incorporated datasheet (14 pp, sha256
becb61c7269e054e, retrieved 2026-10-18, 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).
# AP3843CMTR-E1
**Diodes Incorporated** · DC-DC Converters · SOIC-8
AP3843CMTR-E1 from Diodes Incorporated, 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 | This pin is the Error Amplifier output and is made available for loop compensation. |
| 2 | VFB | input | The inverting input of the Error Amplifier, normally connected to the switching power supply output through a resistor divider. |
| 3 | ISENSE | input | A voltage proportional to inductor current is connected to this input, and the PWM uses it to terminate the output switch conduction. |
| 4 | RT/CT | passive | The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to VREF and capacitor CT to ground, with operation to 500 kHz possible. |
| 5 | GND | power_in | The combined control circuitry and power ground, to which all voltages are referenced. |
| 6 | OUTPUT | output | This output directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1.0 A. |
| 7 | VCC | power_in | The positive supply of the control IC. |
| 8 | VREF | power_out | This is the reference output, providing charging current for capacitor CT through resistor RT. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | | | 30 | V | | 5 |
| Output Current | IO | -1 | | 1 | A | | 5 |
| Analog Inputs | V(ANA) | -0.3 | | 6.3 | V | | 5 |
| Error Amp Output Sink Current | ISINK(E.A) | | | 10 | mA | | 5 |
| Power Dissipation (SOIC-8) | PD | | | 460 | mW | TA<25 oC | 5 |
| Junction Operating Temperature | TJ | -40 | | 150 | °C | | 5 |
| Storage Temperature Range | TSTG | -65 | | 150 | °C | | 5 |
| Lead Temperature (Soldering, 10sec) | TLEAD | | | 300 | °C | 10 sec | 5 |
| ESD (Machine Model) | ESD | | | 250 | V | | 5 |
| Thermal Resistance (Junction to Ambient) SOIC-8 | θJA | | 160 | | °C/W | | 5 |
| Oscillation Frequency (recommended) | f | | | 500 | KHz | | 5 |
| Ambient Temperature | TA | -40 | | 85 | °C | | 5 |
| Reference Output Voltage | VREF | 4.9 | 5 | 5.1 | V | TA=25oC, IREF=1mA | 6 |
| Total Output Variation (Line, Load, Temp.) | | 4.82 | | 5.18 | V | | 6 |
| Line Regulation | ΔVREF | | 4 | 15 | mV | 12V ≤ VCC ≤25V | 6 |
| Load Regulation | ΔVREF | | 4 | 15 | mV | 1mA ≤ IREF ≤20mA | 6 |
| Short Circuit Output Current | ISC | -100 | | -180 | mA | TA=25oC | 6 |
| Temperature Stability (Reference) | | | 0.3 | | mV/oC | | 6 |
| Oscillation Frequency | f | 47 | 52 | 57 | KHz | TA=25oC | 6 |
| Oscillator Amplitude | VOSC | | 1.7 | | V | Pin 4, peak to peak | 6 |
| Temperature Stability (Oscillator) | | | 2.5 | | % | | 6 |
| Voltage Stability | | 0.2 | | 1 | % | 12V ≤ VCC ≤ 25V | 6 |
| Discharge Current | | 8.5 | 9.5 | 10.5 | mA | Vpin 4 =2V (Note 7) | 6 |
| Error Amp Input Voltage | VI | 2.45 | 2.5 | 2.55 | V | Vpin 1=2.5V | 6 |
| Error Amp Output Sink Current | ISINK | 5 | | 8 | mA | Vpin1=1.1V | 6 |
| Error Amp Output Source Current | ISOURCE | -0.5 | | -0.8 | mA | Vpin1=5V | 6 |
| Error Amp High Output Voltage | VOH | 5 | | 7 | V | RL=15kΩ to GND | 6 |
| Error Amp Low Output Voltage | VOL | 0.7 | | 1.1 | V | RL=15kΩ to pin 8 | 6 |
| Error Amp Voltage Gain | | 65 | | 90 | dB | 2V ≤ VO ≤ 4V | 6 |
| Error Amp Power Supply Rejection Ratio | PSRR | 60 | | 70 | dB | 12V ≤ VCC ≤ 25V | 6 |
| Maximum Input Signal | VI(MAX) | 0.9 | 1 | 1.1 | V | Vpin1=5V (Note 4) | 6 |
| Current Sense Gain | GV | 2.85 | 3 | 3.15 | V/V | (Note 4, 5) | 6 |
| Current Sense Power Supply Rejection Ratio | PSRR | | 70 | | dB | 12V≤ VCC≤ 25V (Note 4, 6) | 6 |
| Delay to Output | | 150 | | 300 | ns | Vpin3 = 0 to 2V (Note 6) | 6 |
| Input Bias Current | IBIAS | -3 | | -10 | μA | | 6 |
| Low Output Voltage (ISINK=20mA) | VOL | 0.1 | | 0.4 | V | ISINK = 20mA | 6 |
| Low Output Voltage (ISINK=200mA) | VOL | 1.4 | | 2.2 | V | ISINK = 200mA | 6 |
| High Output Voltage (ISOURCE=20mA) | VOH | 13 | | 14 | V | ISOURCE = 20mA | 6 |
| High Output Voltage (ISOURCE=200mA) | VOH | 12 | | 13 | V | ISOURCE = 200mA | 6 |
| Rise Time | tR | 50 | | 150 | ns | TA=25oC, CL=1nF (Note 6) | 6 |
| Fall Time | tF | 50 | | 150 | ns | TA=25oC, CL=1nF (Note 6) | 6 |
| UVLO Start Threshold (AP3843C/AP3845C) | VTH(ST) | 7.8 | 8.4 | 9 | V | AP3843C/AP3845C | 7 |
| UVLO Min. Operation Voltage after Turn On (AP3843C/AP3845C) | VOPR(Min.) | 7 | 7.6 | 8.2 | V | AP3843C/AP3845C | 7 |
| Max. Duty Cycle (AP3843C) | D(Max.) | 95 | 97 | 100 | % | AP3842C/AP3843C | 7 |
| Min. Duty Cycle | D(Min.) | 0 | | | % | | 7 |
| Start-up Current (AP3843C) | IST | 50 | | 80 | μA | AP3843C/AP3845C, VCC=6.5V | 7 |
| Operating Supply Current | ICC(OPR) | 8 | | 12 | mA | Vpin3=Vpin2=0V | 7 |
| Zener Voltage | VZ | 30 | | 34 | V | ICC=25mA | 7 |
| Shutdown Temperature | TSHUT | | 155 | | °C | (Note 6) | 7 |
| Temperature Hysteresis | THYS | | 25 | | °C | (Note 6) | 7 |
## CAD (KiCad official)
- Symbol: `AP3843CMTR-E1`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ap3843cmtr-e1-etched.step` / `ap3843cmtr-e1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap3843cmtr-e1.step` / `ap3843cmtr-e1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Diodes Incorporated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590912283516760064) (14 pp, sha256 `becb61c7269e054e`, retrieved 2026-10-18, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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](docs/ap3843cmtr-e1-datasheet.pdf)