S-882Z Datasheet, PDF (15/24 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
„ Characteristics (Typical Data)
1. Discharge Start Voltage (V_CPOUT1), Discharge Stop Voltage (V_CPOUT2) vs. Input Voltage (V_IN)
VCPOUT1(S) = 1.8 V
VCPOUT1(S) = 2.4 V
Ta = 25°C
3.0
3.0
2.5
2.0
VCPOUT1 VCPOUT2
2.5
2.0
Ta = 25°C
VCPOUT1
1.5
1.5
VCPOUT2
1.0
1.0
0.5
0.5
0
0 0.5 1.0 1.5 2.0
VIN [V]
0
0 0.5 1.0 1.5 2.0
VIN [V]
2. Discharge Start Voltage (V_CPOUT1), Discharge Stop Voltage (V_CPOUT2) vs. Temperature (Ta)
VCPOUT1(S) = 1.8 V
VCPOUT1(S) = 2.4 V
2.0
VCPOUT1
2.5
1.8
2.3
VCPOUT1
1.6
2.1
1.4
VCPOUT2
1.9
VCPOUT2
1.2
1.7
1.0
-40 -20 0 20 40 60 80
Ta [°C]
1.5
-40 -20 0 20 40 60 80
Ta [°C]
3. Discharge Control Switch Resistance (R_M1) vs. CPOUT Pin Voltage (V_CPOUT)
VCPOUT1(S) = 1.8 V
40
35
Ta = 85°C
30
25
Ta = 25°C
Ta = −40°C
20
1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5
VCPOUT [V]
4. Discharge Start Delay Time (t_OUT) vs. Input Voltage (V_IN)
VIN £ 0.6 V
CCPOUT = 10 mF
Ta = 25°C
8
1.0
VIN ³ 0.6 V
CCPOUT = 10 mF
Ta = 25°C
6
VCPOUT1(S) = 2.4 V
4
2
VCPOUT1(S) = 1.8 V
0
0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65
VIN [V]
0.8
0.6
VCPOUT1(S) = 2.4 V
0.4
0.2
0 ^{VCPOUT1(S) = 1.8 V}
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1
VIN [V]
Seiko Instruments Inc.
15