S-882Z Datasheet, PDF (5/24 Pages) Seiko Instruments Inc – ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP

ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.1.2_00
S-882Z Series
„ Electrical Characteristics
Table 4
(Ta = 25°C unless otherwise specified)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
Measurement
Circuit
Discharge start
voltage^*1
V_CPOUT1 V_IN = 0.35 V
V_CPOUT1(S)
− 0.1
V_CPOUT1(S)
V_CPOUT1(S)
+ 0.1
V
1
Discharge stop
voltage^*2
V_CPOUT2
V_CPOUT1(S) = 1.8 V
V_CPOUT1(S) = 2.0 V
V_CPOUT1
− 0.60
−
V_CPOUT1
− 0.33
V
1
V_CPOUT1
− 0.67
−
V_CPOUT1
− 0.33
V
1
V_CPOUT1(S) = 2.2 V
V_CPOUT1
− 0.74
−
V_CPOUT1
− 0.33
V
1
V_CPOUT1(S) = 2.4 V
V_CPOUT1
− 0.80
−
V_CPOUT1
− 0.33
V
1
Operating input
voltage^*3
V_IN
V_CPOUT1(S) = 1.8 to 2.4 V,
Ta = −40 to +85°C
0.35
−
3.0
V
2
V_CPOUT1(S) = 1.8, 2.0 V,
Ta = −30 to +60°C
0.30
−
3.0
V
2
Oscillation start
voltage
V_ST
Not externally connected, voltage
applied to V_IN
−
−
0.3
V
−
Discharge
control switch
resistance
R_M1
V_CPOUT = 1.8 to 2.4 V,
I_OUT = 3 mA
−
34
100
Ω
3
Discharge start
delay time^*4
t_OUT
V_IN = 0.35 V, C_CPOUT = 10 µF
−
7
25
s
2
Discharge start
voltage
temperature
coefficient
∆VCPOUT1
∆Ta • VCPOUT1
Ta = −40 to +85°C
−
±150 ±550 ppm/°C
−
Current
I_SS
V_IN = 0.3 V, V_CPOUT = 0 V
−
0.1
0.5
mA
4
consumption
V_IN = 0.6 V, V_CPOUT = 0 V
−
0.5
1.5
mA
4
during operation
V_IN = 1.0 V, V_CPOUT = 0 V
−
1.2
3.0
mA
4
Current
I_SSS
V_IN = 0.3 V, V_CPOUT = 0 V, V_VM = 3.0 V
−
−
0.6
µA
5
consumption
during shutdown
V_IN = 0.6 V, V_CPOUT = 0 V, V_VM = 3.0 V
−
V_IN = 1.0 V, V_CPOUT = 0 V, V_VM = 3.0 V
−
−
0.7
µA
5
−
0.7
µA
5
Shutdown
voltage^*5
V_IN = 2.0 V, V_CPOUT = 0 V, V_VM = 3.0 V
−
−
0.8
µA
5
V_OFF
V_IN = 0.3 V, V_CPOUT = 0 V
V_OFF(S)
− 0.1
V_OFF(S)
V_OFF(S)
+ 0.1
V
6
Shutdown
voltage
temperature
coefficient
∆VOFF
∆Ta • VOFF ^{Ta = −40 to +85°C}
−
±150 ±550 ppm/°C
−
Discharge
control switch
leak current^*6
I_LEAK
V_IN = V_CPOUT = 0 V,
V_OUT = V_VM = 3.0 V
−
−
0.1
µA
7
VM pin input
current
I_VM
V_VM = 3.0 V
−
1.0
1.9
µA
8
Oscillation
frequency
f_OSC
V_IN = 0.3 V
−
350
−
kHz
−
*1. V_CPOUT1 : Actual discharge start voltage value, V_CPOUT1(S) : Discharge start voltage setting value
*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 shutdown voltage value (VM pin voltage value at which shutdown actually occurs)
V_OFF(S) : Shutdown voltage setting value (VM pin voltage setting value at which shutdown 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.
Seiko Instruments Inc.
5