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XINNA SEMI

XA2320 Datasheet Preview

XA2320 Datasheet

Regulated Charge Pump DC/DC Converter

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XA2320
Low Noise, Regulated Charge Pump DC/DC Converter
Features
Fixed 5V ± 4% Output
VIN Range: 2.7V to 5V
Output Current: Up to 250mA
Constant Frequency Operation at All Loads
Low Noise Constant Frequency (1.2MHz)
Operation
Automatic Soft-Start Reduces Inrush
Current
Shutdown Current <1µA
Short-Circuit Protection
No Inductors
Available in Low Profile 6-Lead SOT23
Package
Application
White LED Backlighting
Li-Ion Battery Backup Supplies
Local 3V to 5V Conversion
Smart Card Readers
PCMCIA Local 5V Supplies
Description
The XA2320 is a low noise, constant frequency
(1.2MHz) switched capacitor voltage doubler. It
produce a regulated output voltage from a 2.7V
to 4.5V input with up to 250mA of output current.
Low external parts count (one flying capacitor
and two small bypass capacitors at VIN and
VOUT) make the XA2320 ideally suited for
small, battery-powered applications.
A new charge-pump architecture maintains
constant switching frequency to zero load and
reduces both output and input ripple. The
XA2320 have thermal shutdown capability and
can survive a continuous short circuit from
VOUT to GND. Built-in soft-start circuitry
prevents excessive inrush current during
start-up.
High switching frequency enables the use of
small ceramic capacitors. A low current
shutdown feature disconnects the load from VIN
and reduces quiescent current to <1uA.
The XA2320 is available in the 6-pin SOT23-6.
www.szxinna.com
1




XINNA SEMI

XA2320 Datasheet Preview

XA2320 Datasheet

Regulated Charge Pump DC/DC Converter

No Preview Available !

Typical Applications
XA2320
Figure 1: Regulated 5V Output
Figure 2: USB Port to Regulated 5V Power Supply
Figure 3: Lithium-Ion Battery to 5V White or Blue LED Drivers
Pin Description
PIN NUMBER
SOT-23-6
1
2
3
4
5
6
PIN NAME
VOUT
GND
EN
C-
VIN
C+
www.szxinna.com
2


Part Number XA2320
Description Regulated Charge Pump DC/DC Converter
Maker XINNA SEMI
Total Page 9 Pages
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