S-882Z

Manufacturer Part NumberS-882Z
DescriptionULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
ManufacturerSeiko Instruments
S-882Z datasheet
 


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Rev.1.2
_00
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
FOR STEP-UP DC-DC CONVERTER STARTUP
Features
• Operating input voltage
• Current consumption
• Discharge start voltage
• Shutdown voltage
• Oscillation frequency
• Small package
• External component
• Lead-free products
*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
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
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.
0.3 to 3.0 V
During operation : 0.5 mA max. (at V
IN
During shutdown : 0.6 µA max. (at V
IN
1.8 to 2.4 V (selectable in 0.2 V steps)
Discharge start voltage + 0.1 V (fixed)
= 0.3 V)
350 kHz typ. (at V
IN
SOT-23-5 package
*1
Startup capacitor (C
), 1 unit
CPOUT
Package
MP005-A
Seiko Instruments Inc.
S-882Z Series
= 0.3 V)
= 0.3 V)
Drawing Code
Tape
Reel
MP005-A
MP005-A
Example of
1
Datasheet pdf - http://www.DataSheet4U.net/

S-882Z Summary of contents

  • Page 1

    ... Intermittent power supply to intermittently operating system Package Package Name SOT-23-5 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 ...

  • Page 2

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Block Diagram 4 VIN *1. Parasitic diode 2 CPOUT Charge pump circuit *1 CLK signal Oscillation circuit EN− 2 VSS Figure 1 Seiko Instruments Inc. C CPOUT COMP1 − REF *1 − + COMP2 Rev.1.2 _00 ...

  • Page 3

    ... Rev.1.2 _00 Product Name Structure The discharge start voltage for the S-882Z Series can be selected at the user’s request. Refer to “1. Product Name” for the definition of the product name and “2. Product Name List” for the full product names. 1. ...

  • Page 4

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Pin Configurations SOT-23-5 Top view Figure 2 Absolute Maximum Ratings Parameter VIN pin voltage CPOUT pin voltage OUT pin voltage VM pin voltage Power dissipation Operating ambient temperature Storage temperature *1 ...

  • Page 5

    ... CPOUT 3.0 V OUT 3 0 Discharge start voltage setting value CPOUT1(S) + 0.1 V. CPOUT1(S) Seiko Instruments Inc. S-882Z Series ( ° C unless otherwise specified) Min. Typ. Max. Unit V V CPOUT1(S) CPOUT1( CPOUT1(S) − 0 CPOUT1 CPOUT1 − V − 0.60 − ...

  • Page 6

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Measurement Circuits 1. 1 µ µ µF 6 VIN CPOUT VM OUT 1 MΩ VSS V Figure 4 VIN CPOUT VM OUT 1 MΩ VSS V Figure 5 VIN CPOUT VM OUT I VSS OUT V A Figure 6 ...

  • Page 7

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.1.2 _00 VIN CPOUT VM OUT VSS Figure 8 VIN CPOUT VM OUT VSS Figure 9 VIN CPOUT VM OUT VSS A Figure 10 VIN CPOUT VM OUT VSS Figure 11 Seiko Instruments Inc. S-882Z Series 7 Datasheet pdf - http://www.DataSheet4U.net/ ...

  • Page 8

    ... Operation 1. Basic Operation : IC with 2.0 V Discharge Start Voltage (1) In the S-882Z Series, when power of 0 higher is input to the VIN pin, the oscillation circuit starts operation with that power, and the CLK signal is output from the oscillation circuit. (2) The charge pump circuit is driven by this CLK signal, and the power of the VIN pin is converted to the stepped up electric power in the charge pump circuit ...

  • Page 9

    ... When this happens, the internal OFF + − V REF ) exceeds the discharge stop voltage (V CPOUT is lowered than V CPOUT ). CPOUT Seiko Instruments Inc. S-882Z Series Table 5 VM Pin Internal Circuit V < V Operating VM OFF ≥ Shutdown VM OFF ) even if the power-off state is ...

  • Page 10

    ... As a reference, the following shows an example that a Schottky diode (SD1) is added between the output pin (OUT) and the power supply pin (VDD) of the step-up DC-DC converter to be started up in the S-882Z Series (refer to Figure result possible to start up the step-up DC-DC converter by the capacitor with a small value ...

  • Page 11

    ... If the Schottky diode (SD1) has a large reverse current 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 (I DC-DC converter. Moreover 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 V drop voltage (V ...

  • Page 12

    ... The power smoothing capacitor of the step-up DC-DC converter. Set the capacitance value so C VDD that C A Schottky diode and pull-down resistor to prevent the OUT pin voltage of the S-882Z Series SD2, R OUT from exceeding the absolute maximum rated voltage. Bleeder resistors to prevent the VM pin voltage of the S-882Z Series from exceeding the ...

  • Page 13

    ... Step-up DC-DC converter VM R VSS OUT Figure 18 × 0.1 CPOUT SD2 C C CPOUT OUT VIN S-882Z Series Step-up DC-DC converter VM R VSS OUT Figure 19 Seiko Instruments Inc. S-882Z Series VDD OUT R 1 VSS R 2 SD1 VDD VDD OUT R 1 VSS OUT OUT ...

  • Page 14

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Precautions • If the consumption current (I so that conditions (1) and (2) below are satisfied. (1) V ≥ OFF ( 1.0 V ≤ • If the discharge start voltage ( started, the step-up DC-DC converter may not start up. When selecting products, fully check them using an actually mounted model. (Refer to • ...

  • Page 15

    ... CPOUT Pin Voltage ( 1 CPOUT1( 85° 25° −40°C V [V] CPOUT ) vs. Input Voltage (V OUT IN V 0.6 V £ CPOU ° V 2.4 V CPOU 1(S) V [V] IN Seiko Instruments Inc. S-882Z Series ) vs. Input Voltage (V ) CPOUT2 IN V CPOU 1(S) 3.0 2.5 2.0 1.5 1.0 0 0.5 1.5 1 vs. Temperature (Ta) CPOUT2 V CPOUT1(S) 2.5 2.3 2.1 1.9 1.7 1 ...

  • Page 16

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series 5. Discharge Start Delay Time (t 100 0 100 0 Discharge Start Delay Time ( 0. 0.35 V ...

  • Page 17

    ... 1.0 1.5 2 vs. Input Voltage (V ) OFF ° 2.5 V OFF(S) 1.9 V OFF(S) 1.0 1.5 2 vs. Temperature (Ta) OFF 2.5 = OFF(S) 1.9 = OFF( ° Seiko Instruments Inc. S-882Z Series ) 1.8 V, 2.0 V, 2.2 V, 2.4 V CPOUT1(S) 0.4 = ° 0 0.2 ° ° 0 0.0 0.0 0.5 1.0 1.5 2.0 2 3.0 V 3.0 17 ...

  • Page 18

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series 11. Discharge Control Switch Leak Current (I 0.8 0.6 0.4 0.2 0.0 0.0 0.5 1.0 12. VM Pin Input Current (I 1.2 Ta 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.5 1.0 13. Oscillation Frequency (f 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0.0 0.0 0.5 1 vs. Input Voltage (V LEAK = V 2 ° ° ° 2.0 2.5 1 vs. VM Pin Voltage ( ...

  • Page 19

    ... Seiko Instruments Inc. − Seiko Instruments Inc. L Sumida Corporation SD1, SD2 Rohm Co., Ltd. C CPOUT VDD Seiko Instruments Inc. S-882Z Series = 0 3.0 V, and I IN OUT SD2 SD1 C VDD VDD VOUT S-8353D30MC VSS Part No. S-882Z20-M5T1G (Discharge start voltage value setting : 2.0 V) S-8353D30MC (Output voltage setting : 3 ...

  • Page 20

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Marking Specifications (1) SOT-23-5 SOT-23-5 Top view 5 4 (1) (2) (3) ( Product Name vs. Product Code Product Name S-882Z18-M5T1G S-882Z20-M5T1G S-882Z22-M5T1G S-882Z24-M5T1G 20 (1) to (3) : Product code (Refer to Product Name vs. Product Code .) ...

  • Page 21

    ... Datasheet pdf - http://www.DataSheet4U.net/ ...

  • Page 22

    ... Datasheet pdf - http://www.DataSheet4U.net/ ...

  • Page 23

    ... Datasheet pdf - http://www.DataSheet4U.net/ ...

  • Page 24

    ... Use of the information described herein for other purposes and/or reproduction or copying without the express permission of Seiko Instruments Inc. is strictly prohibited. The products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc ...