AP4470

MP

Ultra-Low Power Step-up DC-DC Converter

Ultra-Low Power Step-up DC-DC Converter

MP

Description

The AP4470 is an ultra-low consumption power management chip that integrates a step-up DC-DC converter and hysteresis comparators. The AP4470 requires only 0.20V input to start boosting without the need for an external transformer. The AP4470 has hysteresis operation switch that can control the power supply for target devices (sensors, wireless modules, LEDs) while protecting external storage (capacitors), and the target. 
 
1μW DC input is enough to startup the AP4470. Converted output is stored to external storage device and the AP4470 monitors the device. When the voltage of external storage reaches 3.3V, the AP4470 automatically starts supplying to the target device and stops supplying if the voltage drops down to 2.6V. Overvoltage protection function works at 3.55V.
2-types of power indicators offer reset function and trigger switch function. The trigger (Startup FLAG) is achieved by a signal that is output when DC-DC converter becomes active. The reset (Power Good) is a signal that indicates the AP4470 starts supplying, which means external storage’s voltage reaches 3.3V.
 
The AP4470 is ideally suited for several mW to several mW sources energy harvesting. This provides a self-powered wireless sensor node with simple hardware design.

Key Features

  • Energy harvesting
    A technology that extracts minute energy and converts it into electric power.
  • Suppressing current consumed by self
    The biggest feature is that it consumes the smallest current

Applications

  •                                 ■Energy Harvesting 
    ・Wireless Sensor Node
    ・Wearable and Portable Device
    ■Example of Energy Harvester (several mW to several mW sources)
    ・Ambient Light, Single cell solar battery
    ・Vibration
    ・Microbial Fuel Cell
                                

Specifications

Part Number
AP4470
Startup voltage [V]
0.2
Operation Voltage [V]
Up to 1.0
Start output to external system [V]
3.3
Stop output to external system [V]
2.6
Over voltage protection [V]
3.55
Other

                                
Operating Temperature [℃]
-30 to 85
Device Package
HWQFN
Number of Pins
20

Product Information

Part Status
MP
Pb Free
Yes
Halogen Free
Yes
MSL
MSL2
Packaging
TAPE
JEDEC Standard Packaging
Compliant
Minimum Order Quantity [pcs.]
1000
Replacement P/N

                                

Block Diagram

Block Diagram