# CBM2596DT-ADJ

**Corebai Microelectronics** · DC-DC Converters · TO-263-5

CBM2596DT-ADJ from Corebai Microelectronics, in a TO-263-5. 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 | VIN | power_in | Supply input pin with operating range 4.5V to 40V (absolute maximum 45V), bypassed with an input capacitor CIN. |
| 2 | OUTPUT | output | Switching output of the internal power transistor that drives the inductor and catch diode; output-to-ground voltage must not go below -1V. |
| 3 | GND | power_in | Ground pin of the regulator. |
| 4 | FEEDBACK | input | Feedback sense input (1.23V reference in the adjustable version, set by the R1/R2 divider), rated -0.3V to +25V. |
| 5 | ON/OFF | input | Shutdown control, active-low enable: below 1.3V typ turns the regulator on and above it turns it off, with input range -0.3V to +25V. |
| 6 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Corebai Microelectronics |
| Package | TO-263-5 |
| Category | Power Management ICs |
| Pins | 6 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Feedback Voltage (adjustable version) | VFB | 1.193 | 1.23 | 1.267 | V | 4.5V≤VIN≤40V, 0.2A≤ILOAD≤3A, VOUT programmed for 3V | 3 |
| Feedback Bias Current (adjustable version) | ID |  | 15 | 50 | nA | VFB = 1.3V | 3 |
| Oscillator Frequency | fO | 110 | 150 | 173 | kHz |  | 3 |
| Saturation Voltage | VSAT |  | 1.16 | 1.4 | V | IOUT = 3A (Note 1,2) | 3 |
| Max Duty Cycle (ON) | DC |  |  | 100 | % | (Note 2) | 3 |
| Max Duty Cycle (OFF) |  |  |  | 0 | % | (Note 3) | 3 |
| Current Limit | ICL | 3.4 | 4.5 | 6 | A | Peak Current (Note 1,2) | 3 |
| Output Leakage Current | IL |  |  | 50 | μA | Output = 0V (Note 1,3) | 3 |
| Output Leakage Current | IL |  | 2 | 30 | mA | Output = -1V, VIN = 40V | 3 |
| Quiescent Current | IQ |  | 5 | 10 | mA | (Note 3) | 3 |
| Standby Quiescent Current | ISTBY |  | 100 | 200 | μA | ON/OFF pin = 5V (OFF), VIN = 40V | 3 |
| ON/OFF Pin Input Threshold Voltage (VIH row) | VIH | 2 |  |  | V |  | 3 |
| ON/OFF Pin Input Threshold Voltage (VIL row) | VIL |  |  | 0.6 | V |  | 3 |
| ON/OFF Pin Input Current (IH) | IH |  | 5 | 15 | μA | VLOGIC = 2.5V (regulator OFF) | 3 |
| ON/OFF Pin Input Current (IL) | IL |  | 0.02 | 5 | μA | VLOGIC = 0.5V (regulator ON) | 3 |
| Operating Supply Voltage | VIN | 4.5 |  | 40 | V |  | 2 |
| Adjustable Output Voltage Range | VOUT | 1.2 |  | 37 | V | Adjustable version (Features list) | 1 |
| Maximum Input Supply Voltage | VI |  |  | 45 | V |  | 2 |
| ON/OFF Pin Input Voltage | VIN | -0.3 |  | 25 | V |  | 2 |
| Feedback Pin Voltage |  | -0.3 |  | 25 | V |  | 2 |
| Output Voltage to Ground | VO | -1 |  |  | V |  | 2 |
| Storage Temperature Range | Tstg | -65 |  | 150 | ℃ |  | 2 |
| Operating Temperature Range | TJ | -40 |  | 125 | ℃ |  | 2 |

## CAD (KiCad official)

- Symbol: `CBM2596DT-ADJ`
- Footprint: `Package_TO_SOT_SMD:TO-263-5_TabPin6`
- 3D model: TO-263-5 (KiCad packages3D, STEP)
- 3D model files: `cbm2596dt-adj-etched.step` / `cbm2596dt-adj-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cbm2596dt-adj.step` / `cbm2596dt-adj.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Corebai Microelectronics datasheet](docs/cbm2596dt-adj-datasheet.pdf) (15 pp, sha256 `2fcff6f8c7808777`, retrieved 2026-11-05, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/cbm2596dt-adj-datasheet.pdf)