ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC

FOR STEP-UP DC-DC CONVERTER STARTUP

S-882Z Series

Seiko Instruments Inc.

1

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

= 0.3 V)

During shutdown : 0.6

• 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

= 0.3 V)

• Small package

SOT-23-5 package

• External component

*1

• 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

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

Drawing Code

Package

Tape

Reel

SOT-23-5

MP005-A

MP005-A

MP005-A