描述 Description

The MCP1665 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DC converter that integrates a 36V, 100 mΩ NMOS switch.?It provides a space-efficient high-voltage step-up power supply solution for applications powered by either three-cell alkaline, Ultimate Lithium, NiCd, NiMH,?one-cell Li-Ion or Li-Polymer batteries. The integrated switch is protected by the typical 3.6A cycle-by-cycle inductor peak current limit operation. There is an output overvoltage protection and an open-load protection that turn off switching if the feedback resistors are accidentally disconnected, the feedback pin is short-circuited to GND or the output is exposed to excessive voltage. Pulse-Frequency Modulation (PFM) switching mode used for power saving is implemented, and it is selectable by the dedicated MODE pin.MCP1665 is easy to use and allows creating classic boost, SEPIC or flyback DC-DC converters within a small Printed Circuit Board (PCB) area. All compensation and protection circuitry are integrated to minimize the number of external components.

特性 Features

36V, 100 mΩ Integrated Switch
Up to 92% Efficiency
Higher Current Compared to the Previous MCP166x Switchers Family
Output Voltage Range: Up to 32V
IOUT > 1 A at 5.0V VIN, 12V VOUT
IOUT > 700 mA at 3.3V VIN, 12V VOUT
IOUT > 400 mA at 4.2V VIN, 24V VOUT
Input Voltage Range: 2.9V to 5V
UVLO at VIN Rising: 2.9V, typical
UVLO at VIN Falling: 2.7V, typical
No Load Input Current: 250 μA Typically for PFM, 500 μA Typically for PWM
Shutdown Mode with 0.4 μA Typical Quiescent Current
Automatically PFM/PWM or Selected by the MODE Pin, for High Efficiency
500 kHz PWM Operation with Skipping Mode Operation Selectable by Dedicated MODE Pin
Feedback Voltage Reference: VFB = 1.2V
Cycle-by-Cycle Current Limiting
Internal Compensation
Inrush Current Limiting and Internal Soft Start
Output Overvoltage Protection (OVP) and Open-Load Protection (OLP) for Constant Current Configuration
Thermal Shutdown
Easily Configurable for SEPIC, Cuk or Flyback Topologies
Available Package: 10-Lead 2x2 mm VQFN

簡介

MCP1665屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關(guān)穩(wěn)壓器。由制造生產(chǎn)的MCP1665穩(wěn)壓器 - DC-DC 開關(guān)穩(wěn)壓器DC-DC 開關(guān)穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設(shè)備，用于需要穩(wěn)定 DC 輸入電壓和/或?qū)⑵滢D(zhuǎn)換為不同幅度的輸出電壓的應(yīng)用。這些器件與稱為“控制器”PMIC 的類似產(chǎn)品的區(qū)別在于集成了主開關(guān)元件，設(shè)備提供的電力會通過該元件。