S8880A Datasheet, PDF (5/30 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
 Electrical Characteristics
Table 7
(Ta = +25°C unless otherwise specified)
Item
Symbol
Condition
Min.
Typ.
Max. Unit
Discharge start voltage^*1 V_CPOUT1
V_IN = 0.35 V
Discharge start voltage
temperature coefficient
ΔVCPOUT1
ΔTa • VCPOUT1
Ta
=
−40°C
to
+85°C
V_CPOUT1(S)
− 0.1
V_CPOUT1(S)
V_CPOUT1(S)
+ 0.1
V
−
±150
− ppm/°C
Discharge stop voltage^*2 V_CPOUT2
Operation input voltage
range 1^*3
V_IN1
Operation input voltage
range 2^*3
V_IN2
Discharge start delay
time^*4
t_OUT
Discharge control switch
resistance
R_M1
V_CPOUT1(S) = 1.8 V
V_CPOUT1
− 0.60
−
V_CPOUT1
− 0.33
V
V_CPOUT1(S) = 2.0 V
V_CPOUT1
− 0.67
−
V_CPOUT1
− 0.33
V
V_CPOUT1(S) = 2.2 V
V_CPOUT1
− 0.74
−
V_CPOUT1
− 0.33
V
V_CPOUT1(S) = 2.4 V
V_CPOUT1
− 0.80
−
V_CPOUT1
− 0.33
V
V_CPOUT1(S) = 1.8 V
0.35
−
3.0
V
V_CPOUT1(S) = 2.0 V
0.36
−
3.0
V
V_CPOUT1(S) = 2.2 V, 2.4 V
0.37
−
3.0
V
V_CPOUT1(S) = 1.8 V, 2.0 V,
Ta = −30°C to +60°C
0.37
−
3.0
V
V_CPOUT1(S) = 1.8 V to 2.4 V,
Ta = −40°C to +85°C
0.39
−
3.0
V
V_CPOUT1(S) = 1.8 V, V_IN = 0.35 V, C_CPOUT = 10 μF
−
4.6
−
s
V_CPOUT1(S) = 2.4 V, V_IN = 0.37 V, C_CPOUT = 10 μF
−
5.8
−
s
V_CPOUT = 1.8 V to 2.4 V, I_OUT = 3 mA
−
30
100
Ω
Input power at start-up
Current consumption
during operation
Current consumption
during power-off
Power-off voltage^*5
Power-off voltage
temperature coefficient
P_IN(START-UP)
I_SS
I_SSS
V_OFF
ΔVOFF
ΔTa • VOFF
V_IN = 0.35 V, V_CPOUT = 0 V
V_IN = 0.35 V, V_CPOUT = 0 V
V_IN = 0.6 V, V_CPOUT = 0 V
V_IN = 1.0 V, V_CPOUT = 0 V
V_IN = 0.35 V, V_CPOUT = 0 V, V_VM = 3.0 V
V_IN = 1.0 V, V_CPOUT = 0 V, V_VM = 3.0 V
V_IN = 2.0 V, V_CPOUT = 0 V, V_VM = 3.0 V
V_IN = 0.35 V, V_CPOUT = 0 V
Ta = −40°C to +85°C
−
−
−
−
−
−
−
V_OFF(S)
− 0.1
−
26
0.074
0.38
1.1
0.1
0.1
0.1
V_OFF(S)
±150
−
μW
0.35
mA
1.1
mA
2.3
mA
0.6
μA
0.7
μA
0.8
μA
V_OFF(S)
+ 0.1
V
− ppm/°C
Discharge control switch
leakage current^*6
I_LEAK
V_IN = V_CPOUT = 0 V, V_OUT = V_VM = 3.0 V
−
−
0.1
μA
VM pin input current I_VM
V_VM = 3.0 V
−
0.7
1.8
μA
*1. V_CPOUT1: Actual discharge start voltage
V_CPOUT1(S): Set discharge start voltage
*2. Voltage at which discharge to the OUT pin stops
*3. Input voltage required to start discharge to the OUT pin from the startup capacitor
*4. Delay time from when power is input to the VIN pin until the electric charge of the startup capacitor is discharged to the
OUT pin
*5. V_OFF: Actual power-off voltage (VM pin voltage value at which power-off actually occurs)
V_OFF(S): Set power-off voltage (Set VM pin voltage at which power-off occurs)
V_OFF(S) is automatically set to V_CPOUT1(S) + 0.1 V.
*6. Current that flows into the IC from the OUT pin due to the off-leak current of the discharge control switch
Caution
The voltage that is input to the connected step-up DC-DC converter varies according to the consumption
current of the step-up DC-DC converter and the power smoothing capacitor. Set the discharge start
voltage based on thorough evaluation including the temperature characteristics under the actual usage
conditions.
5