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XINNA SEMI

XA2317 Datasheet Preview

XA2317 Datasheet

Synchronous Boost DC/DC Regulator

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XA2317
Synchronous Boost DC/DC Regulator
Features
Up to 94% Efficiency
Low voltage start-up 0.9V
Shut-down current: < 1µA
: ~Input voltage 0.9V 4.4V
: ~Output voltage 2.5V 4.3V (Up to 5V with
Schottky)
ΩLow switch on resistance RDS(ON), Internal
switch: 0.35
1.4MHz fixed frequency switching
Automatic PWM/PFM mode switching
High switch on current: 0.9A
Low profile SOT-23-6 package (lead-free
packaging is now available)
Applications
Digital cameras and MP3
Palmtop computers / PDAs
Cellular phones
Wireless handsets and DSL modems
PC cards
Portable media players
Description
The XA2317 is high efficiency synchronous,
PWM step-up DC/DC converters optimized to
provide a high efficient solution to medium
power systems. The devices work under the
input voltage between 0.9V and 4.4V with a
1.4MHz fixed frequency switching. These
features minimize overall solution footprint by
allowing the use of tiny, low profile inductors
and ceramic capacitors. Automatic PWM/PFM
mode switching at light load saves power and
improves efficiency.
The XA2317 is capable of supplying an output
voltage between 2.5V and 4.3V, the internal
synchronous switch is desired to provide high
efficiency without Schottky.
The devices also featured providing up to
260mA from a single AA cell input or up to
600mA from a 2-cell AA with a 3V/3.3V output.
The XA2317 regulators are available in the
industry standard SOT-23-6 power packages
(or upon request).
Order Information
① ②XA2317 -
Symbol
Description
Denotes Output voltage:
A : Adjustable Output
Denotes Package Types:
F: SOT-23-6
www.szxinna.com
1




XINNA SEMI

XA2317 Datasheet Preview

XA2317 Datasheet

Synchronous Boost DC/DC Regulator

No Preview Available !

Typical Applications
DC+
0.9V to 4.4V
CIN
20uF
L 2.2uH
1
SW
6 VIN
4
EN
5
VOUT
R1
FB 3
GND
2
R2
VOUT
COUT
20uF
XA2317
Figure 1: Typical Application Circuit
SINGLE + CIN
AA CELL 4.7uF
OFF ON
L 2.2uH
D
1
SW
6 VIN
5
VOUT
4
EN
3
FB
GND
2
M1 SI2306DS
VOUT
R3
510K
R1
1.02M
COUT
4.7uF
R2
604K
R4
Q1
2N3904
510K
Figure 2: Single Cell to 3.3V Synchronous Boost Converter with Load Disconnect in Shutdown.
www.szxinna.com
2


Part Number XA2317
Description Synchronous Boost DC/DC Regulator
Maker XINNA SEMI
Total Page 12 Pages
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