component
MCP1640BT-I
Public Made by Adomby adom
Microchip Tech DC-DC Converters, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownMCP1640BT-I
Microchip Tech · DC-DC Converters · SOT-23-6
MCP1640BT-I from Microchip Tech, in a SOT-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 | SW | output | Switch node and boost inductor input pin; connect the inductor from VIN to SW, and SW carries inductor current up to 800 mA peak. |
| 2 | GND | power_in | Ground or return pin for the circuit; keep the trace from the input cap return, output cap return and GND pin as short as possible to minimize noise, and the SOT-23-6 package uses this single ground pin. |
| 3 | EN | input | Logic-level enable input: a logic high above 90% of VIN enables the regulator output, and a logic low below 20% of VIN ensures the regulator is disabled. |
| 4 | VFB | input | Feedback voltage pin used with an external resistor divider to set output regulation, with feedback voltage of 1.21V typical in regulation. |
| 5 | VOUT | power_out | Output voltage pin that connects the integrated P-Channel MOSFET to the output capacitor, and the feedback divider is also connected to this pin for voltage regulation. |
| 6 | VIN | power_in | Power supply input voltage pin; the input source should be decoupled to GND with a 4.7 µF minimum capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Tech |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| 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 |
|---|---|---|---|---|---|---|---|
| Minimum Start-Up Voltage | VIN | 0.65 | 0.8 | V | Note 1: 3.3 k resistive load, 3.3V VOUT (1 mA) | 3 | |
| Output Voltage Adjust Range | VOUT | 2 | 5.5 | V | VOUT VIN; Note 2 | 3 | |
| Feedback Voltage | VFB | 1.175 | 1.21 | 1.245 | V | 3 | |
| Quiescent Current, PFM Mode | IQPFM | 19 | 30 | µA | Measured at VOUT = 4.0V; EN = VIN, IOUT = 0 mA; Note 3 | 3 | |
| Quiescent Current, Shutdown | IQSHDN | 0.7 | 2.3 | µA | VOUT = EN = GND; Includes N-Channel and P-Channel Switch Leakage | 3 | |
| NMOS Peak Switch Current Limit | IN(MAX) | 600 | 850 | mA | Note 4 | 4 | |
| VOUT Accuracy | VOUT% | -3 | 3 | % | Includes Line and Load Regulation; VIN = 1.5V | 4 | |
| Line Regulation | -1 | 0.01 | 1 | %/V | VIN = 1.5V to 3V; IOUT = 25 mA | 4 | |
| Load Regulation | -1 | 0.01 | 1 | % | IOUT = 25 mA to 100 mA; VIN = 1.5V | 4 | |
| Maximum Duty Cycle | DCMAX | 88 | 90 | % | 4 | ||
| Switching Frequency | fSW | 425 | 500 | 575 | kHz | 4 | |
| EN Input Logic High | VIH | 90 | %of VIN | IOUT = 1 mA | 4 | ||
| EN Input Logic Low | VIL | 20 | %of VIN | IOUT = 1 mA | 4 | ||
| Operating Junction Temperature Range | TJ | -40 | 125 | °C | Steady State | 4 | |
| Storage Temperature Range | TA | -65 | 150 | °C | 4 | ||
| Maximum Junction Temperature | TJ | 150 | °C | Transient | 4 | ||
| Input/Output Voltage to GND (EN, VFB, VIN, VSW, VOUT) | 6.5 | V | 3 | ||||
| Ambient Temperature with Power Applied | -40 | 85 | °C | 3 | |||
| Input Capacitor Value (CIN) | CIN | 4.7 | µF | 16 | |||
| Output Capacitor Value (COUT) | COUT | 10 | 100 | µF | 16 | ||
| Inductor Value | L | 2.2 | 4.7 | 10 | µH | 16 | |
| Thermal Resistance, 6LD-SOT-23 | JA | 190.5 | °C/W | 4 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | gold | MC = Plastic Dual Flat, No Lead (2x3 DFN), 8-lead *Y = Nickel palladium gold manufacturing designator. | 29 |
CAD (KiCad official)
- Symbol:
MCP1640BT-I - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
mcp1640bt-i-etched.step/mcp1640bt-i-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);mcp1640bt-i.step/mcp1640bt-i.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Microchip Tech datasheet (32 pp, sha256
15fab187ccc7397e, retrieved 2026-10-17, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).