S8821 Datasheet, PDF (1/24 Pages) Seiko Instruments Inc – VOLTAGE REGULATION BOOST CHARGE PUMP DC-DC CONVERTER

S-8821 Series
www.sii-ic.com
© SII Semiconductor Corporation, 2002-2017
VOLTAGE REGULATION
BOOST CHARGE PUMP DC-DC CONVERTER
Rev.5.1_02
The S-8821 series is a CMOS boost charge pump DC-DC converter with a voltage regulation function.
The S-8821 series consists of an oscillation circuit, a controller, a reference voltage circuit, an error amplifier
circuit, and an output switching transistor, and can regulate the output voltage by PFM control.
Since small ceramic capacitors can be used for the pump capacitor, input capacitor, and output capacitor, the
mounting area can be minimized.
 Features
• PFM control CMOS boost charge pump
• Power supply voltage:
• Output voltage:
• Output voltage accuracy:
• Built-in soft start circuit:
• Output current
• Oscillation frequency:
• ON/OFF function:
• Lead-free, Sn 100%, halogen-free^*1
1.6 to 5.0 V
2.5 to 5.5 V, selectable in 0.1 V steps.
±2 % max.
1.0 ms typ.
25 mA (V_IN=(V_OUT(S) × 0.80) V)
1.0 MHz typ.
During standby: 1 μA max.
*1. Refer to “ Product Name Structure” for details.
 Applications
• Lithium ion battery driven applications
• Local power supply
• Power supply for white LED display backlights
 Packages
• SOT-23-6W
• SNT-8A
1