CP2128
Product Brief DC/DC Series
CP2128_PB_ENG_Rev1.0 March,2005
Regulated Charge Pump DC/DC Converters
www.datasheet4u.com
OVERVIEW
The CP2128 are low noise, constant frequency switched capacitor voltage doublers. They produce regulated output voltage from a 2.7V to 4.5V input with up to 100mA of output current. Low external parts count make the CP2128 ideally suited for small, battery-powered application. A new charge-pump architecture maintains constant switching frequency to zero load and reduces both output and input ripple. The CP2128 have thermal shutdown capability and can survive a continuous short circuit from Vout to GND. High switching frequency enables the use of small ceramic capacitors. SOT23-6L -40℃~85℃
FEATURES
Low Noise Constant Frequency Operation Output Current:100mA 2MHz Switching Frequency Fixed 5V± 4% Output Vin Range: 2.7V to 4.5V Automatic soft-Start Reduces Inrush Current No Inductors Icc<1uA in Shutdown
Soft Start & Switch Control VOUT
3 SHDN
1
+
2MHz Oscilator
VIN
Charge Pump
6 C+ 4 C-
5
2
GND
Copyright ©2005 Chiphomer Technology Limited
Page 1 of 1
CP2128
Product Brief DC/DC Series
CP2128_PB_ENG_Rev1.0 March,2005
Regulated Charge Pump DC/DC Converters
www.datasheet4u.com
APPLICATIONS
Cellular phones Digital Cameras MP3 Players PDAs, Handheld computers GPS Receivers
TYPICAL APPLICATION
1uF
CVIN
C+ VOUT
100Ω
100Ω 100Ω 100Ω 100Ω
1uF
CP2128
1uF SHDN GND
RELATED PRODUCTS
CP2126: CP2127: Step up White LED Driver, Switches at 900kHz, can drive two to four LEDs in series. Step up White LED Driver, Switches at 1200kHz, can drive two to four LEDs in series.
Chiphomer Technology Limited Add: 4F, Building D, 1618 Yishan Road, Shanghai, P.R.C. Tel: +86-(0)21-64058488, 64014543 Fax: +86-(0)21-64050030 Email:
[email protected] Web: www.chiphomer.com
Copyright ©2005 Chiphomer Technology Limited
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