DC-DC CONVERTER. S-8821 Datasheet

S-8821 CONVERTER. Datasheet pdf. Equivalent

Part S-8821
Description BOOST CHARGE PUMP DC-DC CONVERTER
Feature S-8821 Series www.ablicinc.com © ABLIC Inc., 2002-2017 VOLTAGE REGULATION BOOST CHARGE PUMP DC-DC .
Manufacture ABLIC
Datasheet
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S-8821
S-8821 Series
www.ablicinc.com
© ABLIC Inc., 2002-2017
VOLTAGE REGULATION
BOOST CHARGE PUMP DC-DC CONVERTER
Rev.5.1_03
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 (VIN=(VOUT(S) 0.80) V)
1.0 MHz typ.
During standby: 1 A 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



S-8821
VOLTAGE REGULATION BOOST CHARGE PUMP DC-DC CONVERTER
S-8821 Series
Block Diagram
Rev.5.1_03
VIN
CIN=4.7 F
SW1
C
CPUMP=0.10 F
C
SW2
SW3
SW4
Switch
control
circuit
Soft start
circuit
PFM control
oscillator
circuit
(1.0 MHz)
Rs
+ Rf
-
ON/OFF
circuit
Reference
voltage
VOUT
COUT=10 F
ON/OFF
Figure 1
GND
2





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