XA2361 Converter Datasheet

XA2361 Datasheet, PDF, Equivalent


Part Number

XA2361

Description

PFM Step-Up DC-DC Converter

Manufacture

XINNA SEMI

Total Page 6 Pages
Datasheet
Download XA2361 Datasheet


XA2361
XA2361
PFM Step-Up DC-DC Converter
General Description
The XA2361 Series are PFM step-up DC-DC converters
with very low ripple noise due to the high operation
frequency. The maximum operation frequency is
260KHz.
Only three components are required to realize the
conversion from the battery voltage to a selected output
voltage.
A driver pin (EXT) is provided for driving external
power transistor to extend the output current capability
where large current is required.
Enable pin (EN) is also provided so that the circuit can
be powered down.
Ordering Information
XA2361 X X X X
Package Type:
T: SOT-23-3
F: SOT-23-5
E: SOT-89
Output Voltage:
20: 2.0V
21: 2.1V
49: 4.9V
50: 5.0V
External switch
E: use external switch
L: use internal switch
Features
y 260KHz Maximum Operation Frequency
y 2.0V to 5.0V Output Voltage With 0.1V
Step
y Low Start-up Voltage: 0.8V at 1mA
y ±2.5% Output Voltage Accuracy
y Up to 87% Efficiency
y Output current: 300mA at 2.5V input, 3.3V
output
y Low Ripple and Low Noise
y Output Current Extendable by External
Switch
Applications
y Power source for applications where a
higher voltage than the battery voltage is
required
y One to three cell battery devices
y Power source for cameras, camcorders,
VCRs, PDAs, LED and hand held
communication instrument
Typical Applications
L
33uH
+
-
VIN
1N5819
XA2361LXXE
LX VOUT
GND
VOUT
C
47uF
L
33uH
+
-
VIN
ZTX650
Cb
0.01uF
300
Rb
1N5819
XA2361EXXE
EXT VOUT
GND
VOUT
C
47uF
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XA2361
Block Diagram
Current
limiting
- comparator
LX +
EXT
Error
buffer
PFM
Amplifier
+
control
-
Chip
EN Enable
OSC
260KHz
1.24V
bandgap
XA2361
VOUT
GND
Pin Assignment
Pin
Name
XA236 1
LXXT
SOT-23-3
Part Marking and Package Type
XA236 1
LXXF
SOT-23-5
XA236 1
LXXE
SOT-89
XA236 1
EXXT
SOT-23-3
XA236 1
EXXF
SOT-23-5
XA236 1
EXXE
SOT-89
Description
LX
EXT
VOUT
EN
GND
NC
2
-
3
-
1
-
53 -
- -2
223
1- -
411
3- -
- - Switching pin
5 3 Buffer output for external transistor
2 2 Output voltage
1 - Chip enable (active high)
4 1 Ground
3 - No connection
VOUT
3
XA2361LXXT
(SOT-23-3)
12
GND LX
VOUT
3
XA2361EXXT
(SOT-23-3)
12
GND EXT
LX GND
54
XA2361LXXF
(SOT-23-5)
12 3
EN VOUT NC
LX GND
54
XA2361EXXF
(SOT-23-5)
12 3
EN VOUT EXT
XA2361LXXE
(SOT-89)
123
GND VOUT LX
XA2361EXXE
(SOT-89)
123
GND VOUT EXT
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Features XA2361 PFM Step-Up DC-DC Converter Gen eral Description The XA2361 Series are PFM step-up DC-DC converters with very low ripple noise due to the high operat ion frequency. The maximum operation fr equency is 260KHz. Only three component s are required to realize the conversio n from the battery voltage to a selecte d output voltage. A driver pin (EXT) is provided for driving external power tr ansistor to extend the output current c apability where large current is requir ed. Enable pin (EN) is also provided so that the circuit can be powered down. Ordering Information XA2361 X X X X P ackage Type: T: SOT-23-3 F: SOT-23-5 E: SOT-89 Output Voltage: 20: 2.0V 21: 2. 1V … 49: 4.9V 50: 5.0V External switc h E: use external switch L: use interna l switch Features y 260KHz Maximum Ope ration Frequency y 2.0V to 5.0V Output Voltage With 0.1V Step y Low Start-up V oltage: 0.8V at 1mA y ±2.5% Output Vol tage Accuracy y Up to 87% Efficiency y Output current: 300mA at 2.5V input, 3.3V output y Low Ripple a.
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