IC CHARGE PUMP CONV 1.8V SOT23-5

S-882Z18-M5T1G

Manufacturer Part NumberS-882Z18-M5T1G
DescriptionIC CHARGE PUMP CONV 1.8V SOT23-5
ManufacturerSeiko Instruments
TypeStep-Up (Boost), Switched Capacitor (Charge Pump)
S-882Z18-M5T1G datasheet
 


Specifications of S-882Z18-M5T1G

Internal Switch(s)YesSynchronous RectifierNo
Number Of Outputs1Voltage - Output1.8V
Current - Output3mAFrequency - Switching350kHz
Voltage - Input0.3 ~ 3 VOperating Temperature-40°C ~ 85°C
Mounting TypeSurface MountPackage / CaseSOT-23-5, SC-74A, SOT-25
Power - Output300mWFunctionStep Up
Maximum Operating Temperature+ 85 CMinimum Operating Temperature- 40 C
Mounting StyleSMD/SMTLead Free Status / RoHS StatusLead free / RoHS Compliant
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© Seiko Instruments Inc., 2005-2010
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
0.3 to 3.0 V
• Current consumption
During operation : 0.5 mA max. (at V
During shutdown : 0.6 μA max. (at V
• Discharge start voltage
1.8 to 2.4 V (selectable in 0.2 V steps)
• Shutdown voltage
Discharge start voltage + 0.1 V (fixed)
• Oscillation frequency
350 kHz typ. (at V
• External component
Startup capacitor (C
• Lead-free, Sn 100%, halogen-free
*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.)
*2. Refer to “ Product Name Structure” for details.
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
• SOT-23-5
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
FOR STEP-UP DC-DC CONVERTER STARTUP
= 0.3 V)
IN
= 0.3 V)
IN
= 0.3 V)
IN
*1
), 1 unit
CPOUT
*2
Seiko Instruments Inc.
S-882Z Series
Rev.2.0
_00
Example of
1

S-882Z18-M5T1G Summary of contents

  • Page 1

    ... 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 ...

  • Page 2

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Block Diagram 4 VIN *1 *1. Parasitic diode 2 CPOUT 5 Charge pump circuit CLK signal Oscillation circuit EN− 2 VSS Figure 1 Seiko Instruments Inc. Rev.2.0 C CPOUT * COMP1 − REF 3 *1 − + COMP2 _00 ...

  • Page 3

    ... 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, “2. Package” regarding the package drawings and “3. Product Name List” for the full product names. ...

  • Page 4

    ... When mounted on board [Mounted board] (1) Board size: (2) Board name: JEDEC STANDARD51-7 Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical damage. These values must therefore not be exceeded under any conditions. Figure 3 Power Dissipation of Package (When Mounted on Board) 4 Pin No ...

  • Page 5

    ... Actual discharge start voltage value, V CPOUT1 *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 * ...

  • Page 6

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP S-882Z Series Measurement Circuits 1. VIN VM 1 μF 2. VIN VM 1 μ VIN VM 4. VIN μ CPOUT OUT 1 MΩ VSS V Figure 4 CPOUT OUT 1 M Ω VSS V Figure 5 CPOUT 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.2.0 _00 5. VIN VIN VIN VM 8. VIN A VM CPOUT OUT VSS Figure 8 CPOUT OUT VSS Figure 9 CPOUT OUT VSS A Figure 10 CPOUT OUT VSS Figure 11 Seiko Instruments Inc. S-882Z Series 7 ...

  • 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

    ... VM OUT Caution1. When not using the VM pin, be sure to connect it to the VSS pin. If the VM pin is left open, it may cause malfunctions. 2. Note that the operation to restart a step-up DC-DC converter does not start when CPOUT pin ...

  • 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 14 result possible to start up the step-up DC-DC converter by the capacitor with a small value. ...

  • Page 11

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0 _00 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. ...

  • Page 12

    ... The following are the connection examples based on the set condition. The symbols used in the connection diagram are described in Table 7 below. Symbol A Schottky diode for preventing a voltage decline in the VDD pin due to output capacitor C SD1 step-up DC-DC converter startup. The power smoothing capacitor of the step-up DC-DC converter. Set the capacitance value so ...

  • Page 13

    ... OUT L CPOUT V IN CPOUT VIN S-882Z Series VSS C IN Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant. SD2 C CPOUT OUT VIN Step-up DC-DC converter VM R VSS OUT ...

  • Page 14

    ... DC-DC converter may not start up. When selecting products, fully check them using an actually mounted model. (Refer to • Select a capacitor with a sufficiently large capacitance for the startup capacitor. In the case of a capacitor with insufficient capacitance, 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

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0 _00 Characteristics (Typical Data) 1. Discharge Start Voltage (V 3.0 2.5 2.0 1.5 1.0 0 0.5 1 Discharge Start Voltage (V 2.0 1.8 1.6 1. 1.2 1 Discharge Control Switch Resistance ( 1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5 ...

  • 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 CPOU 100 0 0 CPOU 6. Discharge Start Delay Time ( vs. Startup Capacitor Capacitance Value (C OUT V 0.6 V £ 2 CPOU 1( ° 100 [ F] V 0.6 V £ ...

  • Page 17

    ... ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP Rev.2.0 _00 7. Current Consumption During Operation (I 2.0 ° 1.5 = ° 1.0 0.5 0.0 0.0 1.0 0 Current Consumption During Shutdown (I 0 ° 0 0.0 0.0 0.5 1 Shutdown Voltage (V ) vs. Input Voltage (V OFF 3 ...

  • 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 ( 0.4 Ta 0.2 0.0 0.0 0.5 1 12. VM Pin Input Current (I 1 1.0 0.8 0.6 0.4 0.2 0.0 0.0 0.5 1.0 1 13. Oscillation Frequency (f 4.0 3 ...

  • Page 19

    ... S-882Z Series Step-up DC-DC converter Inductor Schottky diode Startup capacitor Input capacitor Output capacitor Power smoothing capacitor Caution The above connection diagram and constant will not guarantee successful operation. Perform thorough evaluation using the actual application to set the constant CPOUT CONT OUT VM ...

  • Page 20

    ... Product Name vs. Product Code Product Name S-882Z18-M5T1x S-882Z20-M5T1x S-882Z22-M5T1x S-882Z24-M5T1x Remark 1. Please contact our sales office for products with specifications other than the above Please select products of environmental code = U for Sn 100%, halogen-free products. 20 (1) to (3) : Product code (Refer to Product Name vs. Product Code.) ...

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  • Page 24

    ... 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. ...