Microchip MCP1661T Adjustable DC-DC Boost Regulator 2.4-5.5V 200mA SOT-23
Microchip MCP1661T adjustable DC-DC boost regulator with 2.4-5.5V input, 200mA output, 500kHz switching and SOT-23-5 package.
The Microchip MCP1661T Adjustable DC-DC Boost Regulator is a compact, fixed-frequency step-up power solution with a 2.4V to 5.5V input range and a maximum output current of 200mA.
Overview
This surface-mount switching boost regulator is designed to step up lower input voltages to a higher output level. It integrates a 36V, 800mΩ NMOS switch and is supplied in a space-saving SOT-23-5 package. The device achieves an efficiency of up to 92%, helping to maximise battery life by minimising power loss during conversion.
Key Features
- High-voltage integrated 36V, 800mΩ NMOS switch
- Switching frequency of 500kHz
- Cycle-by-cycle inductor peak current limiting at 1.3A
- Output overvoltage protection (OVP) that disables switching if the feedback path is compromised
- Under-voltage lockout (UVLO)
- Internal compensation and inrush current limiting with internal soft start
- Adjustable output voltage configured via external resistors, with a feedback reference of 1.227V
- Configurable for SEPIC or Flyback converter topologies
Power Consumption
The regulator draws 250µA typical input current under no load and features a sleep mode with a typical quiescent current of 200nA, suited to power-sensitive designs.
Applications
Designed for portable and battery-powered applications, it is compatible with two or three-cell alkaline, ultimate lithium, NiCd, NiMH, or single-cell Li-ion/Li-polymer batteries.
Specifications
- Input voltage: 2.4V to 5.5V
- Maximum output current: 200mA
- Package: SOT-23-5 surface mount
- Width: 3.3, Depth: 1.5, Height: 4.3
- Weight: 0.154 gm
Choose the Microchip MCP1661T when you need a compact boost regulator for step-up power conversion in portable and battery-powered designs.
- Portable applications
- Battery-powered devices
- Power-sensitive designs
- SEPIC converter topologies
- Input Voltage: 2.4V to 5.5V
- Maximum Output Current: 200mA
- Switching Frequency: 500kHz
- Integrated Switch: 36V, 800mΩ NMOS
- Efficiency: Up to 92%
- Peak Inductor Current Limit: 1.3A
- Input Current: 250µA typical under no load
- Sleep Mode Quiescent Current: 200nA typical
- Feedback Voltage Reference: 1.227V
- Output Voltage: Adjustable via external resistors
- Topology: Configurable for SEPIC or Flyback
- Protection: Overvoltage protection (OVP) and under-voltage lockout (UVLO)
- Special Feature: Internal compensation and soft start
- Package: SOT-23-5 surface mount
- Width: 3.3
- Depth: 1.5
- Height: 4.3
- Weight: 0.154 gm
Documents
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