# KP523201ALGA

**Kiwi Instruments** · DC-DC Converters · TSOT-23-6

KP523201ALGA from Kiwi Instruments, in a TSOT-23-6. 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 | GND | power_in | Power ground and signal ground. |
| 2 | SW | passive | Switch node; connect to the output inductor with a short, wide trace. |
| 3 | VIN | power_in | Input supply pin (4.5V to 17V operating); place a 100nF ceramic decoupling capacitor as close as possible to VIN and GND. |
| 4 | FB | input | Feedback pin; the output voltage is divided by resistors to this pin for output voltage setting and control (VREF 0.768V). |
| 5 | EN | input | Enable control; pull high or leave floating to enable, and a pull-up resistor of at least 100kΩ is required in series when tied to VIN; also adjusts the VIN UVLO threshold. |
| 6 | BST | passive | Charge-pump supply for the high-side MOSFET driver; connect a 100nF ceramic capacitor between BST and SW. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Kiwi Instruments |
| Package | TSOT-23-6 |
| Category | Power Supply Chip |
| 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 |
|---|---|---|---|---|---|---|---|
| VIN operating input voltage | VIN | 4.5 |  | 17 | V |  | 4 |
| VIN shutdown current | ISHDN(VIN) |  | 2.5 | 6 | µA | VIN = 12 V, VEN = 0 V | 4 |
| VIN UVLO rising threshold | VUVLO(R) | 4 | 4.2 | 4.4 | V | VIN rising | 4 |
| VIN UVLO falling threshold | VUVLO(F) | 3.6 | 3.8 | 4 | V | VIN falling | 4 |
| EN rising threshold | VEN(R) |  | 1.2 | 1.28 | V | EN rising, switching enabled | 4 |
| EN falling threshold | VEN(F) |  | 1.02 | 1.14 | V | EN falling, switching disabled | 4 |
| EN pin sourcing current | IEN(P) | 0.95 | 1.14 | 1.5 | µA | VEN = 1.0 V | 4 |
| EN pin hysteresis current | IEN(H) | 2.3 | 2.73 | 3.81 | µA |  | 4 |
| FB voltage | VFB | 0.76 | 0.768 | 0.776 | V | TJ = 25℃ | 5 |
| FB voltage | VFB | 0.757 | 0.768 | 0.779 | V | TJ = -40℃ to 125℃, VIN = 12 V | 5 |
| FB input leakage current | IFB(LKG) | -100 | 0 | 100 | nA | TJ = 25℃ | 5 |
| Internal soft-start time | TSS | 0.5 | 1 | 1.5 | ms | 10% VOUT to 90% VOUT | 5 |
| Valley current limit | ILS(OC) | 3 | 4 | 5 | A | VIN = 12 V | 5 |
| VIN voltage | VIN | -0.3 |  | 19 | V |  | 3 |
| SW voltage, DC | SW | -0.3 |  | 19 | V | DC | 3 |
| SW voltage, transient | SW | -3 |  | 21 | V | Transient < 10 ns | 3 |
| VIN, SW, DC | VIN-SW | -0.3 |  | 19 | V | DC | 3 |
| VIN, SW, transient | VIN-SW | -3 |  | 21 | V | Transient < 10 ns | 3 |
| BOOT voltage | BOOT | -0.3 |  | 25 | V |  | 3 |
| BOOT, SW | BOOT-SW | -0.3 |  | 6 | V |  | 3 |
| EN, FB voltage | EN, FB | -0.3 |  | 6 | V |  | 3 |
| Operating junction temperature | TJ | -40 |  | 150 | ℃ |  | 3 |
| Storage temperature | TSTG | -65 |  | 150 | ℃ |  | 3 |
| ESD HBM | VESD_HBM | -2000 |  | 2000 | V | HBM | 3 |
| ESD CDM | VESD_CDM | -500 |  | 500 | V | CDM | 3 |
| VIN input voltage range | VIN | 4.5 |  | 17 | V |  | 3 |
| Output voltage range | VOUT | 0.768 |  | 7 | V |  | 3 |
| Output current range | IOUT | 0 |  | 3 | A |  | 3 |
| SW voltage, DC | SW | -0.1 |  | 17 | V | DC | 3 |
| SW voltage, transient | SW | -3 |  | 19 | V | Transient < 10 ns | 3 |
| VIN, SW, DC | VIN-SW | -0.1 |  | 17 | V | DC | 3 |
| VIN, SW, transient | VIN-SW | -3 |  | 19 | V | Transient < 10 ns | 4 |
| BOOT voltage | BOOT | -0.1 |  | 22.5 | V |  | 4 |
| BOOT, SW | BOOT-SW | -0.1 |  | 5.5 | V |  | 4 |
| EN, FB voltage | EN, FB | -0.1 |  | 5.5 | V |  | 4 |
| Junction temperature | TJ | -40 |  | 125 | ℃ |  | 4 |
| VIN quiescent current KP523201A | IQ(VIN) |  | 190 |  | µA | No switching, VEN = 5 V, VFB = VREF*105%, IOUT = 0 A | 4 |
| EN delay time | TDLY |  | 440 |  | µs | From EN high to first switching pulse | 5 |
| Switching frequency | FSW |  | 580 |  | kHz | VIN = 12V, VOUT = 5V, continuous conduction | 5 |
| High-side MOSFET on-resistance | RDSON(HS) |  | 80 |  | mΩ | TJ = 25℃, VIN = 12V, VBOOT-SW = 5V | 5 |
| Low-side MOSFET on-resistance | RDSON(LS) |  | 50 |  | mΩ | TJ = 25℃, VIN = 12V | 5 |
| Minimum on-time | tON(min) |  | 50 |  | ns |  | 5 |
| Minimum off-time | tOFF(min) |  | 180 |  | ns |  | 5 |
| Dead time | tDEAD |  | 10 |  | ns |  | 5 |
| Zero-cross detection point | IZC |  | 70 |  | mA |  | 5 |
| UVP threshold | VUVP |  | 65 |  | % | VFB falling | 5 |
| OVP threshold | VOVP |  | 115 |  | % | VFB rising | 5 |
| Thermal shutdown threshold | TJ(SD) |  | 160 |  | ℃ |  | 5 |
| Thermal shutdown hysteresis | TJ(HYS) |  | 35 |  | ℃ |  | 5 |
| Junction-to-ambient thermal resistance (EVM) | RθJA(EVM) |  | 54 |  | ℃/W | EVM 60mm x 45mm, 2-layer 2Oz; VIN=12V, VOUT=5V, IOUT=3A, TA=25℃ | 4 |

## CAD (KiCad official)

- Symbol: `KP523201ALGA`
- Footprint: `Package_TO_SOT_SMD:TSOT-23-6`
- 3D model: TSOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `kp523201alga-etched.step` / `kp523201alga-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `kp523201alga.step` / `kp523201alga.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Kiwi Instruments datasheet](docs/kp523201alga-datasheet.pdf) (23 pp, sha256 `b5aa4b4b40158fbe`, retrieved 2026-10-22, 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/kp523201alga-datasheet.pdf)