MCP1642B - Electronic component Microchip - Free user manual and instructions
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| Type of product | DC-DC Boost (Step-Up) Converter |
| Brand | Microchip Technology |
| Model | MCP1642B |
| Input voltage range | 0.65 V to 5.5 V |
| Output voltage range | Adjustable up to 5.5 V |
| Maximum output current | Up to 150 mA (depending on input/output conditions) |
| Switching frequency | 500 kHz typical |
| Efficiency | Up to 96% |
| Quiescent current | 19 µA typical (not switching) |
| Shutdown current | Less than 1 µA |
| Package type | SOT-23-6 |
| Dimensions (approx.) | 2.9 mm x 1.6 mm x 1.1 mm |
| Weight (approx.) | 30 mg |
| Operating temperature range | -40°C to +85°C |
| Main functions | True shutdown, output disconnect, overcurrent protection, thermal shutdown |
| Maintenance | None required; no cleaning recommended |
| Safety features | Thermal shutdown, overcurrent protection, under-voltage lockout |
| Spare parts / Repairability | Not applicable; component is sold as-is, replacement only |
| Compliance | RoHS compliant, lead-free |
Frequently Asked Questions - MCP1642B Microchip
What is the input voltage range for the MCP1642B?
The input voltage range is from 0.65 V to 5.5 V. It can operate from a single cell alkaline or NiMH battery.
What output voltage can the MCP1642B provide?
The output voltage is adjustable up to 5.5 V via an external resistor divider. The feedback voltage is 1.23 V.
How do I enable the MCP1642B?
The device is enabled by applying a logic high (>0.8 V) to the EN pin. Connecting EN to VIN enables the device, while grounding it disables the output.
What is the switching frequency of the MCP1642B?
The switching frequency is typically 500 kHz, allowing the use of small inductors and capacitors.
What is the quiescent current of the MCP1642B?
The quiescent current is 19 µA typical when not switching. In shutdown mode, it draws less than 1 µA.
Can the MCP1642B be used with lithium batteries?
Yes, it can operate from lithium batteries as long as the input voltage stays within the 0.65 V to 5.5 V range, such as a single Li-Ion cell.
What is the maximum output current of the MCP1642B?
The maximum output current depends on input/output voltage and inductor. Typically up to 150 mA when boosting from 1.2 V to 3.3 V.
Does the MCP1642B have overcurrent protection?
Yes, it features overcurrent protection with a cycle-by-cycle current limit. The typical peak current limit is around 600 mA.
What package is the MCP1642B available in?
It is available in a SOT-23-6 package, which is small and suitable for compact designs.
Is the MCP1642B RoHS compliant?
Yes, the MCP1642B is RoHS compliant and lead-free, making it suitable for environmentally friendly designs.
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