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AP2005SPER
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Wuxi Chipown Micro electronics DC-DC Converters, ESOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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AP2005SPER
Wuxi Chipown Micro electronics · DC-DC Converters · ESOP-8
AP2005SPER from Wuxi Chipown Micro electronics, in a ESOP-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 | PGND | power_in | Chip (power) ground pin, listed as 芯片地 in the datasheet; the layout guidance requires GND and the exposed pad to be tied to a large ground area. |
| 2 | OC | passive | Adjustable current-limit pin that may be left floating; a resistor between OC and GND sets the peak switch current from 0.7A to 4.5A using a 33k to 475k resistor, and no capacitor should be placed on this pin. |
| 3 | VCC | power_in | Chip supply input with an operating range of 2.5V to 5.5V, and an undervoltage lockout threshold of 2.2V with 0.1V hysteresis. |
| 4 | EN | input | Enable control, active high, with an enable threshold of 0.96V and a shutdown threshold of 0.6V; the absolute maximum rating for this pin is -0.3V to +6V. |
| 5 | GND | power_in | Chip ground pin (芯片地); the layout guidance requires GND and the exposed pad to be connected to a large ground area for heat dissipation and noise protection. |
| 6 | FB | input | Error amplifier inverting input tied to the 0.6V (±2%) reference; the output voltage is set by a divider between VOUT and FB, and the absolute maximum rating is -0.3V to +6V. |
| 7 | NC | unconnected | No connection. |
| 8 | LX | output | Power switch output (internal 0.05Ω, 4.5A, 12V MOSFET drain node); the absolute maximum SW voltage is -0.3V to +12V. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Wuxi Chipown Micro electronics |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |
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 voltage range | VCC | 2.5 | 5.5 | V | 3 | ||
| Reference voltage | VREF | 0.588 | 0.6 | 0.612 | V | 3 | |
| Adjustable overcurrent protection current | IOCP | 0.7 | 4.5 | A | With External Resistor: 33k~475k | 3 | |
| Maximum duty cycle | TDUTY | 90 | % | 3 | |||
| Frequency variation with voltage | Δf/V | 5 | % | VCC=2.5V ~5.5V | 3 | ||
| Line regulation | 0.2 | % / V | VCC=2.5V~5.5V | 3 | |||
| Undervoltage lockout threshold | VUVLO | 2.2 | V | 3 | |||
| Undervoltage lockout hysteresis | 0.1 | V | 3 | ||||
| Static current | ICC | 0.2 | mA | VFB=0.66V, No switching | 3 | ||
| Average input current | ICC | 6.5 | mA | VFB=0.55V, Switching | 3 | ||
| Shutdown input current | ICC | 0.1 | μA | VEN=GND | 3 | ||
| Operating frequency | FOSC | 1 | MHz | 3 | |||
| Enable voltage | VEN | 0.96 | V | 3 | |||
| Shutdown voltage | VEN | 0.6 | V | 3 | |||
| On-resistance | RDS(ON) | 0.05 | Ω | ILX=2A | 3 | ||
| Overcurrent protection current | IOCP | 6 | A | 3 | |||
| Overtemperature protection threshold | TOTP | 150 | °C | 3 | |||
| Input voltage | VIN | -0.3 | 6 | V | 2 | ||
| SW voltage | VSW | -0.3 | 12 | V | 2 | ||
| FB, EN voltage | VFB, VEN | -0.3 | 6 | V | 2 | ||
| Operating temperature range | TA | -40 | 85 | °C | 2 | ||
| Storage temperature range | TSTG | -65 | 150 | °C | 2 | ||
| Lead temperature (soldering, 10 s) | 260 | °C | 10 s soldering | 2 |
CAD (KiCad official)
- Symbol:
AP2005SPER - Footprint:
Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm - 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files:
ap2005sper-etched.step/ap2005sper-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ap2005sper.step/ap2005sper.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Wuxi Chipown Micro electronics datasheet (7 pp, sha256
f2fbb9cd6ab2343b, retrieved 2026-10-18, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).
# AP2005SPER
**Wuxi Chipown Micro electronics** · DC-DC Converters · ESOP-8
AP2005SPER from Wuxi Chipown Micro electronics, in a ESOP-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 | PGND | power_in | Chip (power) ground pin, listed as 芯片地 in the datasheet; the layout guidance requires GND and the exposed pad to be tied to a large ground area. |
| 2 | OC | passive | Adjustable current-limit pin that may be left floating; a resistor between OC and GND sets the peak switch current from 0.7A to 4.5A using a 33k to 475k resistor, and no capacitor should be placed on this pin. |
| 3 | VCC | power_in | Chip supply input with an operating range of 2.5V to 5.5V, and an undervoltage lockout threshold of 2.2V with 0.1V hysteresis. |
| 4 | EN | input | Enable control, active high, with an enable threshold of 0.96V and a shutdown threshold of 0.6V; the absolute maximum rating for this pin is -0.3V to +6V. |
| 5 | GND | power_in | Chip ground pin (芯片地); the layout guidance requires GND and the exposed pad to be connected to a large ground area for heat dissipation and noise protection. |
| 6 | FB | input | Error amplifier inverting input tied to the 0.6V (±2%) reference; the output voltage is set by a divider between VOUT and FB, and the absolute maximum rating is -0.3V to +6V. |
| 7 | NC | unconnected | No connection. |
| 8 | LX | output | Power switch output (internal 0.05Ω, 4.5A, 12V MOSFET drain node); the absolute maximum SW voltage is -0.3V to +12V. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Wuxi Chipown Micro electronics |
| Package | ESOP-8 |
| Category | Power Management (PMIC) |
| Pins | 9 |
## 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 voltage range | VCC | 2.5 | | 5.5 | V | | 3 |
| Reference voltage | VREF | 0.588 | 0.6 | 0.612 | V | | 3 |
| Adjustable overcurrent protection current | IOCP | 0.7 | | 4.5 | A | With External Resistor: 33k~475k | 3 |
| Maximum duty cycle | TDUTY | | | 90 | % | | 3 |
| Frequency variation with voltage | Δf/V | | 5 | | % | VCC=2.5V ~5.5V | 3 |
| Line regulation | | | 0.2 | | % / V | VCC=2.5V~5.5V | 3 |
| Undervoltage lockout threshold | VUVLO | | 2.2 | | V | | 3 |
| Undervoltage lockout hysteresis | | | 0.1 | | V | | 3 |
| Static current | ICC | | 0.2 | | mA | VFB=0.66V, No switching | 3 |
| Average input current | ICC | | 6.5 | | mA | VFB=0.55V, Switching | 3 |
| Shutdown input current | ICC | | 0.1 | | μA | VEN=GND | 3 |
| Operating frequency | FOSC | | 1 | | MHz | | 3 |
| Enable voltage | VEN | | 0.96 | | V | | 3 |
| Shutdown voltage | VEN | | 0.6 | | V | | 3 |
| On-resistance | RDS(ON) | | 0.05 | | Ω | ILX=2A | 3 |
| Overcurrent protection current | IOCP | | 6 | | A | | 3 |
| Overtemperature protection threshold | TOTP | | 150 | | °C | | 3 |
| Input voltage | VIN | -0.3 | | 6 | V | | 2 |
| SW voltage | VSW | -0.3 | | 12 | V | | 2 |
| FB, EN voltage | VFB, VEN | -0.3 | | 6 | V | | 2 |
| Operating temperature range | TA | -40 | | 85 | °C | | 2 |
| Storage temperature range | TSTG | -65 | | 150 | °C | | 2 |
| Lead temperature (soldering, 10 s) | | | | 260 | °C | 10 s soldering | 2 |
## CAD (KiCad official)
- Symbol: `AP2005SPER`
- Footprint: `Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm`
- 3D model: ESOP-8 (KiCad packages3D, STEP)
- 3D model files: `ap2005sper-etched.step` / `ap2005sper-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ap2005sper.step` / `ap2005sper.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Wuxi Chipown Micro electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588881122042793984) (7 pp, sha256 `f2fbb9cd6ab2343b`, retrieved 2026-10-18, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/ap2005sper-datasheet.pdf)