S-882Z Datasheet, PDF (1/24 Pages) Seiko Instruments Inc – ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP

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 V_IN = 0.3 V)
During shutdown : 0.6 µA max. (at V_IN = 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 V_IN = 0.3 V)
SOT-23-5 package
Startup capacitor (C_CPOUT), 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.
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