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AX5101A PDF даташит

Спецификация AX5101A изготовлена ​​​​«AXElite» и имеет функцию, называемую «Step-up PWM DC/DC Converter».

Детали детали

Номер произв AX5101A
Описание Step-up PWM DC/DC Converter
Производители AXElite
логотип AXElite логотип 

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AX5101A Даташит, Описание, Даташиты
AX5101A
Step-up PWM DC/DC Converter
™ GENERAL DESCRIPTION
The AX5101A is high efficient step-up DC/DC converter. Large output current is
possible having a built in internal N channel MOSFET, and using an external coil and
diode.
The AX5101A can be operated at switching frequencies of 500 kHz allowing for easy
filtering and low noise, the size of the external components can be reduced.
Output voltage is programmable with 1.0V of standard voltage supply internal, and
using externally connected components, output voltage (FB) can be set up at will.
This converter also contains an error amplifier circuit as well as a soft-start circuit
that prevents inrush-current at startup. The thermal shutdown function is built inside.
™ FEATURES
- Input voltage: 3V to 14V
- Output voltage: 3.3V to 28V(±2.5%
- Duty ratio: 0% to 80% PWM control
- Switch current: 3A(MAX)
- Oscillation frequency: 500 KHz.
- Soft-start function
- Thermal Shutdown function
- Built-in internal SW N-channel MOS
- SOP-8L Pb-Free Package.
1/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.04, 2007









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AX5101A Даташит, Описание, Даташиты
AX5101A
™Block Diagram
Vcc
Phase
FB Compensation
+
-
Vref
PWM
Controller
+
-
Oscillator
Thermal
Shutdown
Buffer
Driver
SW
Vss
SGND
™ PIN ASSIGNMENT
The package of AX5101A is SOP-8L; the pin assignment is given by:
SGND 1
VCC 2
VCC 3
FB 4
( Top View )
AX5101A
SOP-8L
8 Vss
7 Vss
6 SW
5 SW
Name
SGND
VCC
FB
SW
VSS
Description
Signal ground pin.
IC power supply pin
Feedback pin
Switch pin. Connect external
inductor & diode here.
GND pin
™ ORDER/MARKING INFORMATION
Order Information
AX5101 X X X
Frequency
A : 500Khz
Package Type Packing
S: SOP-8L
Blank : Tube
A : Taping
Top Marking
Logo AX 5101
AXXXXX
AX5101A
Part number
ID code: internal
WW: 01~52
Year : 06 = 2006
2/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.04, 2007









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AX5101A Даташит, Описание, Даташиты
AX5101A
™ Absolute Maximum Ratings (at Ta=25)
Characteristics
Symbol
Rating
Unit
VCC Pin Voltage
Feedback Pin Voltage
Switch Pin Voltage
Power Dissipation
VCC VSS - 0.3 to VSS + 15
V
VFB VSS - 0.3 to VCC
V
VSW VSS - 0.3 to 30
V
PD Internally limited mW
Storage Temperature Range
TST -40 to +150
Operating Temperature Range
TOP -20 to +125
Thermal Resistance from Junction to case
θJC
25 /W
Thermal Resistance from Junction to ambient θJA
70 /W
Note : θJA is measured with the PCB copper area of approximately 2 in2(Multi-layer) that need connect
to SW pins(5&6) of the AX5101A.
™ Electrical Characteristics (VIN = 6V, VOUT=12V, Ta=25, unless otherwise specified)
Characteristics
Symbol
Conditions
Min Typ Max Units
Operating Supply Voltage
VCC
3 - 14 V
Output Voltage Range
VOUT
3.3 - 28 V
Feedback Voltage
VFB IOUT=0.1A
0.98 1.00 1.02 V
Quiescent Current
ICCQ VFB=1.5V force driver off
4 6 mA
Feedback Bias Current
IFB IOUT=0.1A
- 0.1 0.5 uA
Switch Current
ISW
3.2 -
-A
Oscillation Frequency
FOSC SW pin
400 500 600 KHz
Soft-Start Time
TSS
0.3 4 8 ms
Internal MOSFET RDSON
RDSON
VCC=3V, VFB=0V
VCC=5V, VFB=0V
- 50 70
40 60 m
VCC=12V, VFB=0V
- 30 50
Efficiency
EFFI
VCC=6V
VOUT=12V
Isw = 2A
Isw = 3A
-
93
92
-
%
Maximum Duty Cycle
Minimum Duty Cycle
DCMAX
DCMIN
VFB=0.4V
VFB=1.2V
- 80 -
%
- 0-
Thermal shutdown Temp
TSD
125
3/8
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Dec.04, 2007










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