描述 Description

The MIC33163/4 is a highly efficient synchronous buck regulator with integrated inductor which provides the optimal trade-off between footprint and efficiency. The MIC33163/4 operates at 4MHz switching frequency and provides up to 1A output current. In addition, the 100% duty cycle and HLL mode of operation delivers very-high efficiency at light loads and ultra-fast transient response which makes the MIC33163/4 perfectly suited for any space constrained application and great alternative for low dropout regulators. An additional benefit of this proprietary architecture is very low output ripple voltage throughout the entire load range with the use of small output capacitors.The MIC33163/4 provides a small compact total solution size of 4.6mm x 7mm with very few tiny external components.At higher loads, the MIC33163/4 provides a constant switching frequency around 4MHz while achieving peak efficiencies up to 93%. It also includes under-voltage lockout to ensure proper operation under power-sag conditions, internal softstart to reduce inrush current, fold-back current limit, power good indicator and thermal shutdown. The MIC33163/4 is available in 20-pin 2.5mm × 3.0mm x 1.1mm QFN package with an operating junction temperature range from –40°C to +125°C.

特性 Features

Integrated MOSFETs and inductor
100% duty cycle
4MHz PWM operation in continuous mode
1A output current
Low output voltage ripple
85% typical efficiency at 1mA, up to 93% peak efficiency
Ultra-fast transient response
Advanced copper lead frame design provides superior thermal performance
Low radiated emission (EMI) per EN55022, class B
Adjustable output voltage 0.7V to 5V
Thermal shutdown and current-limit protection
Configurable soft-start with pre-bias start-up capability
Auto discharge of 180O (MIC33164 only)
Low profile 2.5mm × 3.0mm x 1.1mm QFN package
0.1μA shutdown current
33μA quiescent current

簡介

MIC33164屬于集成電路（IC）的穩(wěn)壓器-DC-DC開關穩(wěn)壓器。由制造生產(chǎn)的MIC33164穩(wěn)壓器 - DC-DC 開關穩(wěn)壓器DC-DC 開關穩(wěn)壓器 PMIC（電源管理集成電路）產(chǎn)品族中的產(chǎn)品是元器件級設備，用于需要穩(wěn)定 DC 輸入電壓和/或將其轉換為不同幅度的輸出電壓的應用。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元件，設備提供的電力會通過該元件。