1V升3.3V到5V高效同步1uA超低静态电流升压转换器

DESCRIPTION 

The MP28300 is a monolithic powermanagement unit containing 300mA, highefficiency, step-down, switching converters and 

a 100mA LDO regulator. The nanoamp 

quiescent current provides extremely high 

efficiency when the load current is down in the 

µA range. With minimum input voltage as low 

as 2V, the MP28300 allows the system to 

operate directly from the battery. 

The constant-on-time control scheme provides 

fast transient response, high light-load 

efficiency, and requires minimal capacitance. 

The regulation can be made tight by integrating 

an error amplifier to correct the output voltage. 

An 100mA LDO regulator provides easy system 

configuration with clean output voltage. 

The CTRL pins control the on/off and output 

voltage selection functions. 

Fault protection features include under-voltage 

lockout (UVLO), over-current protection (OCP), 

and thermal shutdown. 

The MP28300 requires a minimal number of 

readily available, standard, external 

components and is available in a small QFN-12 

(2mmx2mm) package. 

FEATURES

 300mA Buck Switcher 

o Ultra-Low Iq: 500nA 

o Wide 2.0V to 5.5V Operating Input 

Range 

o 7 Selectable Output Voltages 

o Up to 300mA Output Current 

o 1.5MHz Switching Frequency in 

Continuous Conduction Mode (CCM) 

o 100% Duty Cycle in Dropout 

o 0.25Ω and 0.25Ω Internal Power 

MOSFET Switches 

o Cycle-by-Cycle Over-Current Protection 

(OCP) 

o Short-Circuit Protection (SCP) with 

Hiccup Mode 

 100mA LDO 

o Ultra-Low Iq: 300nA 

o 2.0V to 5.5V Operating Input Range 

o 3 Selectable Output Voltages 

o Over-Temperature Protection (OTP) 

 Available in a QFN-12 (2mmx2mm) 

Package 

APPLICATIONS 

 Wearables 

 IOT 

 Portable Instruments 

 Battery-Powered Devices

1uA电源DC-DC LDO三端稳压IC 不发烫解决方案