# EG1503

**EG Micro** · AC-DC Controllers & Regulators · SSOP-24-150mil

EG1503 from EG Micro, in a SSOP-24-150mil. 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 | LED2 | output | Battery level indicator LED2 output. |
| 2 | LED1 | output | Battery level indicator LED1 output. |
| 3 | VREF | power_out | 2.5V reference output with an external 1uF capacitor, used as the internal ADC reference (max output current 1mA). |
| 4 | AD0 | input | ADC input. |
| 5 | TFB | input | ADC input connected to internal AD1 and AD5 inputs; can be used as temperature detection input in power bank applications. |
| 6 | OUTP | output | Short-circuit output enable control. |
| 7 | IAPO | output | Current signal amplifier output, with an external 0.1uF capacitor. |
| 8 | IFB1 | input | Current-sense feedback input of constant-current channel 1 in boost mode. |
| 9 | AGND | power_in | Analog ground. |
| 10 | IFB2 | input | Current-sense feedback input of constant-current channel 2 in boost mode. |
| 11 | SCL | bidirectional | I2C clock line, multiplexed with falling-edge wake-up from sleep. |
| 12 | SDA | bidirectional | I2C data line. |
| 13 | Icharge | input | Charge current sense feedback input in buck mode. |
| 14 | VBAT | power_in | Output voltage sense feedback input in buck mode. |
| 15 | COMP | output | Error amplifier output compensation pin. |
| 16 | PGND | power_in | Power ground. |
| 17 | NMOS | output | Gate drive output for the external low-side NMOS, drive current ±100mA. |
| 18 | LX | bidirectional | Switch node. |
| 19 | PMOS | output | Gate drive output for the external high-side PMOS, drive current ±100mA. |
| 20 | VCC | power_in | Chip supply pin, operating range 2.5V to 5.5V (abs max 6V). |
| 21 | BLED | output | High-power lighting LED output, drive capability 100mA. |
| 22 | LED5 | output | Battery level indicator LED5 with adjustable constant current. |
| 23 | LED4 | output | Battery level indicator LED4 output. |
| 24 | LED3 | output | Battery level indicator LED3 output. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | EG Micro |
| Package | SSOP-24-150mil |
| Category | Power Management ICs |
| 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 |
|---|---|---|---|---|---|---|---|
| VCC supply voltage (abs max) | VCC |  |  | 6 | V | TA=25°C | 9 |
| Input/output voltage (abs max) | All |  |  | 6 | V | TA=25°C | 9 |
| Junction temperature | Tj | -55 |  | 150 | °C | TA=25°C | 9 |
| Ambient temperature | TA | -45 |  | 85 | °C |  | 9 |
| Storage temperature | Tstr | -65 |  | 150 | °C |  | 9 |
| Soldering temperature | TL |  |  | 300 | °C | T=10S | 9 |
| Supply voltage | Vcc | 2.5 | 5 | 5.5 | V | TA=25°C, VCC=5V | 9 |
| Sleep mode current | Iccs |  |  | 5 | uA | 关闭内部所有电路模块 | 9 |
| Standby current | Iccq |  | 0.48 | 2 | mA | 关闭功率 MOSFET | 9 |
| Operating quiescent current | Icc |  | 15 | 18 | mA | f=200KHz，PWM 工作同步续流开启 | 9 |
| Reference voltage | VREF | 2.475 | 2.5 | 2.525 | V | VCC=5V | 9 |
| Line regulation | ΔVREF |  | 10 | 20 | mV | VCC=3V to 5.5V | 9 |
| Load regulation | ΔVREF |  | 20 | 50 | mV | IL=0 to 1mA | 9 |
| Max output current | IO |  |  | 1 | mA | VCC=3V to 5.5V | 9 |
| Oscillator frequency range | Δf | 42 |  | 500 | KHz | VCC=3 to 5V | 9 |
| Supply rejection | Δf/ΔVCC |  | 3 | 5 | % | VCC=3 to 5V; printed ± | 9 |
| Temperature drift | Δf/ΔT |  | 5 | 8 | % | printed ± | 9 |
| Minimum frequency | fMIN |  | 42 |  | KHz |  | 9 |
| Maximum frequency | fMAX |  | 500 |  | KHz |  | 9 |
| Input offset voltage | VOS |  | 2 | 10 | mV | VCC=5V | 10 |
| Input bias current | Ib |  | 1 | 10 | uA |  | 10 |
| Input offset current | IOS |  |  | 1 | uA |  | 10 |
| Open-loop gain | AVOL | 60 | 75 |  | dB |  | 10 |
| Output low level | VOL |  | 0.2 | 0.5 | V |  | 10 |
| Output high level | VOH | 3.8 | 4.7 |  | V |  | 10 |
| Common-mode rejection ratio | CMRR | 60 | 75 |  | dB |  | 10 |
| Power supply rejection ratio | PSRR | 50 | 60 |  | dB |  | 10 |
| MOS driver output low I | VOL I |  | 0.1 | 0.4 | V | ISINK=20mA | 10 |
| MOS driver output low II | VOL II |  | 1 | 2 | V | ISINK=100mA | 10 |
| MOS driver output high I | VCH I | 4 | 4.5 |  | V | ISOURCE=20mA | 10 |
| MOS driver output high II | VCH II | 3.5 | 4 |  | V | ISOURCE=100mA | 10 |
| Rise time | tR |  | 100 | 500 | nS | CL=1nF，Tj=25℃ | 10 |
| Fall time | tF |  | 70 | 300 | nS | CL=1nF，Tj=25℃ | 10 |

## CAD (KiCad official)

- Symbol: `EG1503`
- Footprint: `Package_SO:SSOP-24_5.3x8.2mm_P0.65mm`
- 3D model: SSOP-24-150mil (KiCad packages3D, STEP)
- 3D model files: `eg1503-etched.step` / `eg1503-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `eg1503.step` / `eg1503.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [EG Micro datasheet](docs/eg1503-datasheet.pdf) (21 pp, sha256 `14f6fac7774f8e34`, retrieved 2026-10-23, 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-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](docs/eg1503-datasheet.pdf)