# RT9026GFP

**Richtek Tech** · Linear Voltage Regulators (LDO) · MSOP-10-EP

RT9026GFP from Richtek Tech, in a MSOP-10-EP. 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 | VDDQSNS | input | VDDQSNS sense input pin; the internal divider tracks 1/2 VDDQSNS for both VTT and VTTREF, with VDDQSNS input current specified at 50 µA max (VIN = 5V, S5 = S3 = 5V). |
| 2 | VLDOIN | power_in | Power supply of the VTT and VTTREF output stage (powers the MOS), with a recommended supply range of 1.2V to 3.3V. |
| 3 | VTT | power_out | Termination output voltage for connection to termination resistors, equal to VDDQSNS/2, with source/sink current limits of 3A min and 4A typ. |
| 4 | PGND | power_in | Power ground of the VTT output stage. |
| 5 | VTTSNS | input | VTT voltage sense input; connect to the plus terminal of the output capacitor. |
| 6 | VTTREF | power_out | Buffered reference output equal to VDDQSNS/2, supporting up to 10mA sourcing and sinking. |
| 7 | S3 | input | Active-low suspend-to-RAM mode control pin: when low, VTT is turned off and left High-Z while VTTREF remains active; logic-high input minimum is 1.6V and logic-low maximum is 0.4V. |
| 8 | GND | power_in | Ground pin; it must be connected to the exposed pad and the PCB ground plane. |
| 9 | S5 | input | Active-low shutdown control pin: when low, both VTT and VTTREF are turned off and discharged to ground. |
| 10 | VIN | power_in | Analog input pin (to control loop), with a supply range of 3.15V to 5.5V. |
| 11 | GND | power_in | Exposed thermal pad ground; it must be soldered to a large PCB and connected to GND for maximum power dissipation. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Richtek Tech |
| Package | MSOP-10-EP |
| Category | Power Management ICs |
| Pins | 11 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VIN (to control loop) Supply Current | IVIN |  |  | 2 | mA | VIN = 5V, No Load, S5 = S3 = 5V | 4 |
| VIN Standby Current | IVINSTB |  |  | 300 | μA | VIN = 5V, No Load, S5 = 5V, S3 = 0V | 4 |
| VLDOIN (to power MOS) Supply Current | IVLDOIN |  |  | 2 | mA | VIN = 5V, No Load, S5 = S3 = 5V | 4 |
| VLDOIN Standby Current | IVLDOINSTB |  |  | 10 | μA | VIN = 5V, No Load, S5 = 5V, S3 = 0V | 4 |
| VLDOIN Shutdown Current | IVLDOINSHDN |  |  | 1 | μA | VIN = 5V, No Load, S5 = S3 = 0V | 4 |
| VDDQSNS Input Current | IVDDQSNS |  |  | 50 | μA | VIN = 5V, S5 = S3 = 5V | 4 |
| VTTSNS Input Current | IVTTSNS |  |  | 1 | μA | VIN = 5V, S5 = S3 = 5V | 4 |
| VTTREF, VTT Output Tolerance | VVTTTOL | -20 |  | 20 | mV | VDDQSNS = VLDOIN = 2.5V/1.8V/1.5V/1.35V/1.2V, /IVTT/= 0A | 5 |
| VTTREF, VTT Output Tolerance | VVTTTOL | -40 |  | 40 | mV | VDDQSNS = VLDOIN = 1.2V, /IVTT/= 1.2A | 5 |
| VTT Source Current Limit | IVTTOCLsr | 3 | 4 |  | A | VTT = 0V | 5 |
| VTT Sink Current Limit | IVTTOCLsk | 3 | 4 |  | A | VTT = VDDQSNS | 5 |
| VTT Discharge Current | IDSCHRG | 10 | 17 |  | mA | VDDQSNS = 0V, VTT = 1.25V, S5 = S3 = 0V | 5 |
| VDDQSNS/2, VTTREF Output Voltage Tolerance | VVTTREFTOL | -20 |  | 20 | mV | VLDOIN = VDDQSNS = 2.5V/1.8V/1.5V/1.35V/1.2V, IVTTREF < 10mA | 5 |
| VTTREF Source Current Limit | IVTTREFOCL | 20 | 40 | 60 | mA | VVTTREF = 0V | 5 |
| UVLO Threshold Voltage (Rising) | VUVLO |  |  | 2.7 | V | Rising | 5 |
| Logic-High Input Voltage | VIH | 1.6 |  |  | V | S5, S3 pin | 5 |
| Logic-Low Input Voltage | VIL |  |  | 0.4 | V | S5, S3 pin | 5 |
| Logic Input Leakage Current | IILK |  |  | 1 | μA | S5, S3 pin | 5 |
| Supply Input Voltage, VIN (absolute maximum) |  |  |  | 6 | V |  | 4 |
| Supply Input Voltage, VLDOIN, VDDQSNS (absolute maximum) |  |  |  | 3.6 | V |  | 4 |
| Power Dissipation, MSOP-10 (Exposed Pad) | PD |  |  | 1.163 | W | TA = 25°C | 4 |
| Package Thermal Resistance, MSOP-10 (Exposed Pad), junction to ambient | θJA |  |  | 86 | °C/W |  | 4 |
| Package Thermal Resistance, MSOP-10 (Exposed Pad), junction to case | θJC |  |  | 30 | °C/W |  | 4 |
| Lead Temperature (Soldering) |  |  |  | 260 | °C | Soldering, 10 sec. | 4 |
| Junction Temperature |  |  |  | 150 | °C |  | 4 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 4 |
| ESD Susceptibility, HBM (Human Body Model) |  |  |  | 2 | kV |  | 4 |
| ESD Susceptibility, MM (Machine Model) |  |  |  | 200 | V |  | 4 |
| Supply Input Voltage, VIN (recommended) |  | 3.15 |  | 5.5 | V |  | 4 |
| Supply Input Voltage, VLDOIN, VDDQSNS (recommended) |  | 1.2 |  | 3.3 | V |  | 4 |
| Junction Temperature Range |  | -40 |  | 125 | °C |  | 4 |
| Ambient Temperature Range |  | -40 |  | 85 | °C |  | 4 |

## CAD (KiCad official)

- Symbol: `RT9026GFP`
- Footprint: `Package_SO:MSOP-10-1EP_3x3mm_P0.5mm_EP1.68x1.88mm`
- 3D model: MSOP-10-EP (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Richtek Tech datasheet](docs/rt9026gfp-datasheet.pdf) (14 pp, sha256 `c00b245be9492010`, retrieved 2026-11-05, tier: manufacturer)
- **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/rt9026gfp-datasheet.pdf)