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PDF S-882Z Data sheet ( Hoja de datos )
| Número de pieza | S-882Z | |
| Descripción | ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC | |
| Fabricantes | Seiko Instruments | |
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www.DataSheet.co.kr
Rev.1.2_00
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
FOR STEP-UP DC-DC CONVERTER STARTUP
S-882Z Series
The S-882Z Series is a charge pump IC for step-up DC-DC converter
startup, which differs from conventional charge pump ICs, in that it uses
fully depleted SOI (Silicon on Insulator) technology to enable ultra-low
voltage operation.
Being capable of stepping up an extremely low input voltage of 0.3 to 0.35
V, this series enables the efficient use of very low energy levels. The
stepped up electric power is stored in a 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 level.
Moreover, a built-in shutdown 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 battery life extension.
The S-882Z Series chips come in a small SOT-23-5 package, allowing
high-density mounting.
Features
• Operating input voltage
• Current consumption
• Discharge start voltage
• Shutdown voltage
• Oscillation frequency
• Small package
• External component
• Lead-free products
0.3 to 3.0 V
During operation : 0.5 mA max. (at VIN = 0.3 V)
During shutdown : 0.6 µA max. (at VIN = 0.3 V)
1.8 to 2.4 V (selectable in 0.2 V steps)
Discharge start voltage + 0.1 V (fixed)
350 kHz typ. (at VIN = 0.3 V)
SOT-23-5 package
Startup capacitor (CCPOUT), 1 unit*1
*1. The addition of a Schottky diode or a power smoothing capacitor may be necessary depending on the output
smoothing capacitor value of the step-up DC-DC converter and the output voltage value. (Refer to Example of
Connection with Step-up DC-DC Converter.)
Applications
• Stepping up from low-voltage power supply such as solar cell and fuel cell
• Stepping up internal power supply voltage of RF tag
• Intermittent power supply to intermittently operating system
Package
Package Name
SOT-23-5
Package
MP005-A
Drawing Code
Tape
MP005-A
Reel
MP005-A
Seiko Instruments Inc.
1
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
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
Discharge stop
voltage*2
VCPOUT1
VCPOUT2
VIN = 0.35 V
VCPOUT1(S) = 1.8 V
VCPOUT1(S) = 2.0 V
VCPOUT1(S) = 2.2 V
VCPOUT1(S) = 2.4 V
Operating input
voltage*3
VIN
VCPOUT1(S) = 1.8 to 2.4 V,
Ta = −40 to +85°C
VCPOUT1(S) = 1.8, 2.0 V,
Ta = −30 to +60°C
Oscillation start
voltage
Discharge
control switch
resistance
VST
Not externally connected, voltage
applied to VIN
RM1
VCPOUT = 1.8 to 2.4 V,
IOUT = 3 mA
Discharge start
delay time*4
tOUT VIN = 0.35 V, CCPOUT = 10 µF
Discharge start
voltage
temperature
coefficient
∆VCPOUT1
∆Ta • VCPOUT1
Ta = −40 to +85°C
Current
ISS VIN = 0.3 V, VCPOUT = 0 V
consumption
VIN = 0.6 V, VCPOUT = 0 V
during operation
VIN = 1.0 V, VCPOUT = 0 V
Current
ISSS VIN = 0.3 V, VCPOUT = 0 V, VVM = 3.0 V
consumption
during shutdown
VIN = 0.6 V, VCPOUT = 0 V, VVM = 3.0 V
VIN = 1.0 V, VCPOUT = 0 V, VVM = 3.0 V
VIN = 2.0 V, VCPOUT = 0 V, VVM = 3.0 V
Shutdown
voltage*5
VOFF
VIN = 0.3 V, VCPOUT = 0 V
Shutdown
voltage
temperature
coefficient
∆VOFF
∆Ta • VOFF
Ta = −40 to +85°C
Discharge
control switch
leak current*6
ILEAK
VIN = VCPOUT = 0 V,
VOUT = VVM = 3.0 V
VM pin input
current
IVM VVM = 3.0 V
Oscillation
frequency
fOSC
VIN = 0.3 V
VCPOUT1(S)
− 0.1
VCPOUT1(S)
VCPOUT1(S)
+ 0.1
VCPOUT1
− 0.60
−
VCPOUT1
− 0.33
VCPOUT1
− 0.67
−
VCPOUT1
− 0.33
VCPOUT1
− 0.74
−
VCPOUT1
− 0.33
VCPOUT1
− 0.80
−
VCPOUT1
− 0.33
0.35 −
3.0
0.30 −
3.0
− − 0.3
− 34 100
− 7 25
V
V
V
V
V
V
V
V
Ω
s
− ±150 ±550 ppm/°C
−
−
−
−
−
−
−
VOFF(S)
− 0.1
0.1
0.5
1.2
−
−
−
−
VOFF(S)
0.5
1.5
3.0
0.6
0.7
0.7
0.8
VOFF(S)
+ 0.1
mA
mA
mA
µA
µA
µA
µA
V
− ±150 ±550 ppm/°C
− − 0.1 µA
− 1.0 1.9 µA
− 350 − kHz
1
1
1
1
1
2
2
−
3
2
−
4
4
4
5
5
5
5
6
−
7
8
−
*1. VCPOUT1 : Actual discharge start voltage value, VCPOUT1(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. VOFF : Actual shutdown voltage value (VM pin voltage value at which shutdown actually occurs)
VOFF(S) : Shutdown voltage setting value (VM pin voltage setting value at which shutdown occurs)
VOFF(S) is automatically set to VCPOUT1(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
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.1.2_00
S-882Z Series
If the Schottky diode (SD1) has a large reverse current or if a pull-down resistor is added to the OUT pin of the
S-882Z Series, add the current value generated from these to the current consumption (IVDD) of the step-up
DC-DC converter.
Moreover, if a Schottky diode is added between the OUT pin of the S-882Z Series and the power supply pin (VDD
pin) of the step-up DC-DC converter, set VCPOUT1 so that it is higher by the amount corresponding to the forward
drop voltage (VF) of the added Schottky diode in comparison to the discharge start voltage value (VCPOUT1)
obtained with the above described conditional expression.
Cautions 1.
The S-882Z Series can start up the step-up DC-DC converter more reliably as the discharge
start voltage value (VCPOUT1) and the startup capacitor value (CCPOUT) are larger. However,
note that the time from when the input power is input until the step-up DC-DC converter
starts becomes longer in this case.
2. In the S-882Z Series, CCPOUT can be more lowered as VCPOUT1 is higher, but note that if VCPOUT1
≥ 2.2 V, the minimum value of the operation input voltage (the minimum input voltage value
required for power to be output from the OUT pin of the S-882Z Series) rises from 0.3 V to
0.35 V (refer to Table 6).
Discharge Start Voltage
Value
1.8, 2.0 V
1.8 to 2.4 V
Table 6
Minimum Operation Input
Voltage Value
0.3 V
0.35 V
Temperature Range
−30 to +60°C
−40 to +85°C
Caution The above connection diagram and constant will not guarantee
successful operation. Perform thorough evaluation using the actual
application to set the constant.
Standard Circuit
CCPOUT
CPOUT
OUT
VIN S-882Z Series
VSS
VM
Figure 15
Caution The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Seiko Instruments Inc.
11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet S-882Z.PDF ] | |
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