# LD59030DTPU18R

**STMicroelectronics** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · DFN-4(1x1)

LD59030DTPU18R from STMicroelectronics, in a DFN-4(1x1). 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 | OUT | power_out | Regulated output voltage pin for the 1.8 V variant, which needs a ceramic output capacitor of at least 0.47 µF; the DT version adds an output discharge MOSFET (RON 120 Ω) that is active when EN is low. |
| 2 | GND | power_in | Common ground pin, to which all voltages are referenced; the thermal pad must also be connected to GND. |
| 3 | EN | input | Enable logic input where Low means shutdown and High means active, with logic low at most 0.4 V and logic high at least 1 V. |
| 4 | IN | power_in | Input voltage pin with an operating range of 1.5 V to 5.5 V, which needs an input capacitor of at least 1 µF placed close to the pin. |
| 5 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DFN-4(1x1) |
| Category | Power Management (PMIC) |
| Pins | 5 |

## 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 | VIN | -0.3 |  | 7 | V | Referred to GND | 5 |
| Output voltage | VOUT | -0.3 |  |  | V | Max VIN + 0.3 V | 5 |
| Enable input voltage | VEN | -0.3 |  | 7 | V | Referred to GND | 5 |
| Storage temperature range | TSTG | -40 |  | 150 | °C |  | 5 |
| Operating junction temperature range | TOP | -40 |  | 125 | °C |  | 5 |
| Thermal resistance junction-ambient | RthJA |  | 140 |  | °C/W |  | 5 |
| Operating input voltage | VIN | 1.5 |  | 5.5 | V |  | 6 |
| VOUT accuracy | VOUT | -1 |  | 1 | % | IOUT = 1 mA, TJ = 25 °C | 6 |
| VOUT accuracy | VOUT | -2 |  | 2 | % | IOUT = 1 mA, -40 °C < TJ < 85 °C | 6 |
| Static line regulation | ΔVOUT |  |  | 0.05 | %/V | -40 °C < TJ < 85 °C | 6 |
| Static load regulation | ΔVOUT | -0.004 |  | -0.01 | %/mA | IOUT = 0 mA to 300 mA, -40 °C < TJ < 85 °C | 6 |
| Dropout voltage | VDROP |  | 180 | 210 | mV | IOUT = 300 mA, VOUT = 1.8 V; typ at TJ = 25 °C, max at -40 °C < TJ < 85 °C (Table 6) | 8 |
| Quiescent current | IQ |  | 28 | 40 | µA | IOUT = 0 mA | 6 |
| Standby current | IStandby |  | 0.03 | 1 | µA | VEN = GND | 6 |
| Short circuit current | ISC |  | 120 | 170 | mA | VOUT = 0 (foldback protection) | 6 |
| Enable input logic low | VEN |  |  | 0.4 | V | VIN = 1.5 V to 5.5 V, -40 °C < TJ < 85 °C | 6 |
| Enable input logic high | VEN | 1 |  |  | V | VIN = 1.5 V to 5.5 V, -40 °C < TJ < 85 °C | 6 |
| Output capacitor | COUT | 0.47 |  | 22 | µF | Capacitance (see Figure 15. Stability area vs. (COUT, ESR)) | 7 |

## CAD (KiCad official)

- Symbol: `LD59030DTPU18R`
- Footprint: `Package_DFN_QFN:UDFN-4-1EP_1x1mm_P0.65mm_EP0.48x0.48mm`
- 3D model: DFN-4(1x1) (KiCad packages3D, STEP)
- 3D model files: `ld59030dtpu18r-etched.step` / `ld59030dtpu18r-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ld59030dtpu18r.step` / `ld59030dtpu18r.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [STMicroelectronics datasheet](https://www.st.com/resource/en/datasheet/ld59030dtpu18r.pdf) (24 pp, sha256 `9d6692cfdb529f7b`, 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/ld59030dtpu18r-datasheet.pdf)