Power Management ICs

Energy Harvesting Powered by Ultra-Low Power and Ultra-Low Voltage Operation Boost Charge Pump for Step-Up DC-DC Converter Startup S-8880A Series

The S-8880A Series is a boost charge pump for step-up DC-DC converter startup, which enables operation with ultra-low power and ultra-low voltage. An original circuit system and SOI technology allow this product to boost the industry’s lowest level*1 0.35 V ultra-low input voltage as a boost charge pump, and achieve operation with an extremely weak power of 26 μW.
The boosted electric power is stored in an external startup capacitor, and it is discharged as the startup power of the step-up DC-DC converter when the startup capacitor reaches the discharge start voltage (VCPOUT1). A built-in power-off function is also provided, so that when the output voltage of the connected step-up DC-DC converter rises above a given value, the operation is stopped, thereby achieving significant power saving and contributing to lower power consumption of devices.
It also includes boost flying capacitors, which allows for formation of a step-up DC-DC converter startup circuit by adding a minimum of just one external capacitor, thus realizing miniaturization of devices.

*1. Based on available information as of October 2016

Features

Ultra-low power and ultra-low voltage operation
Input power at startup (PIN(START-UP)) = 26 μW typ.
(VCPOUT1(S) = 1.8 V, VIN = 0.35 V) (Ta = +25°C)
Minimum operation input voltage
0.35 V (VCPOUT1(S) = 1.8 V) (Ta = +25°C)
0.39 V (VCPOUT1(S) = 1.8 V to 2.4 V) (Ta = −40°C to +85°C)
Current consumption during operation
74 μA typ. (VIN = 0.35 V)
Discharge start voltage
VCPOUT1(S) = 1.8 V to 2.4 V (Selectable in 0.2 V step)
Power-off voltage
VCPOUT1 + 0.1 V (Fixed internally)
External component
Startup capacitor(CCPOUT) ×1unit*1
Operation temperature range
Ta = −40°C to +85°C
Lead-free (Sn 100%), halogen-free

*1. The addition of a Schottky diode or a power smoothing capacitor may be necessary depending on the capacitance of a smoothing capacitor of the step-up DC-DC converter and the output voltage value.

Applications

  • Boosting from low-voltage power supply
  • Boosting internal power supply voltage of RF tag
  • Intermittently power supplying to intermittent operation system
  • Energy harvesting