S8880A Datasheet, PDF (13/30 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

ENERGY HARVESTING POWERED BY ULTRA-LOW POWER AND ULTRA-LOW VOLTAGE OPERATION BOOST CHARGE PUMP FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.1.0_01
S-8880A Series
 Application Circuit Example
Figure 12 shows an application circuit example when V_IN = 0.37 V to 3.0 V, V_OUT = 3.0 V, I_OUT = 1 mA and Ta = −30°C to
+60°C.
V_IN
C_IN
OUT
VIN
S-8880A20
VM
VSS CPOUT
C_CPOUT
SD2
L
SD1
CONT VDD
C_VDD
VOUT
S-8353D30MC
VSS
V_VOUT
C_L
Figure 12
Table 11
Part Name
Symbol
Manufacturer
Part No.
S-8880A Series
−
SII Semiconductor Corporation
S-8880A20-xxT1U
(Set discharge start voltage: 2.0 V)
Step-up DC-DC converter
−
SII Semiconductor Corporation
S-8353D30MC
(Set output voltage: 3.0 V)
Inductor
L
Sumida Corporation
CDRH5D18-101 (100 μH)
Schottky diode
SD1, SD2 Rohm Co., Ltd.
RB551V-30
Startup capacitor
C_CPOUT
Input capacitor
C_IN
Output capacitor
C_L
Power smoothing capacitor C_VDD
−
10 μF (Ceramic type)
−
47 μF
−
33 μF (ESR > 50 mΩ)
−
1 μF (Ceramic type)
Caution The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
13