S8880A Datasheet, PDF (1/30 Pages) Seiko Instruments Inc – 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
www.sii-ic.com
ENERGY HARVESTING
POWERED BY ULTRA-LOW POWER AND ULTRA-LOW VOLTAGE OPERATION
BOOST CHARGE PUMP FOR STEP-UP DC-DC CONVERTER STARTUP
© SII Semiconductor Corporation, 2017
Rev.1.0_01
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 (V_CPOUT1). 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:
• Minimum operation input voltage:
• Current consumption during operation:
• Discharge start voltage:
• Power-off voltage:
• External component:
• Operation temperature range:
• Lead-free (Sn 100%), halogen-free
Input power at startup (P_IN(START-UP)) = 26 μW typ.
(V_CPOUT1(S) = 1.8 V, V_IN = 0.35 V) (Ta = +25°C)
0.35 V (V_CPOUT1(S) = 1.8 V) (Ta = +25°C)
0.39 V (V_CPOUT1(S) = 1.8 V to 2.4 V) (Ta = −40°C to +85°C)
74 μA typ. (V_IN = 0.35 V)
V_CPOUT1(S) = 1.8 V to 2.4 V (Selectable in 0.2 V step)
V_CPOUT1 + 0.1 V (Fixed internally)
Startup capacitor (C_CPOUT) × 1 unit^*1
Ta = −40°C to +85°C
*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. Refer to " Example of
Connection with Step-up DC-DC Converter" for details.
 Applications
 Packages
• Boosting from low-voltage power supply
• Boosting internal power supply voltage of RF tag
• Intermittently power supplying to intermittent operation
system
• Energy harvesting
• SOT-23-5
(2.8 mm × 2.9 mm × t1.3 mm max.)
• SNT-8A
(2.46 mm × 1.97 mm × t0.5 mm max.)
 Typical Application Circuit
V_IN
C_IN
VIN
S-8880A
Series
VSS CPOUT
OUT
VM
10 μF
SD1
VIN VDD
C_VDD
Step-up DC-DC ^VOUT
Converter
VSS
V_VOUT
C_L
1