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AX1184 PDF даташит

Спецификация AX1184 изготовлена ​​​​«AXElite» и имеет функцию, называемую «4A Ultra Low Dropout Positive Linear Regulator».

Детали детали

Номер произв AX1184
Описание 4A Ultra Low Dropout Positive Linear Regulator
Производители AXElite
логотип AXElite логотип 

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AX1184 Даташит, Описание, Даташиты
AX1184
4A Ultra Low Dropout Positive Linear Regulator
„ Feature
0.7V maximum dropout voltage at 4A load current
Built-in Thermal shutdown
Output current limiting
Adjustable output voltage: 1.250V
Fast transient response
Good noise rejection
Packages: SOP-8L, TO220-5L and TO263-5L
„ General Description
AX1184 is a 4A regulator with extremely low dropout voltage. This product is specifically designed to provide
well regulated supply for applications requiring 2.8V or lower voltages from 3.3V ATX power supplies where
high efficiency of the switch can be achieved without the cost and complexity associated with switching
regulator. One such application is the new graphic chipsets that requires anywhere from 2.4V to 2.7V supply.
„ Ordering Information
AX1184 X X
Package
S:SOP-8L
M5:TO263-5L
T5:TO220-5L
Packing
Blank : Tube
A : Taping
„ Typical Application
VIN+2.5V VIN+5V
C1
100uF
C2
100uF
AX1184-ADJ
1 Vsense
2 ADJ/GND
4 Vctrl
VOUT
5 VIN
3
VOUT = VREF x (1+ R2 )
VREF = 1.250V
R1
Vout=1.8V
R1
100 C3
100uF
R2
220
Axelite Confidential Materials, do not copy or distribute without written consent
1/11
1/10
Rev.1.0 Jan.16, 2008









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AX1184 Даташит, Описание, Даташиты
0755-8398 3377 135 9011 2223
http://www.gofotech.com
4A Ultra Low Dropout Positive Linear Regulator
AX1184
„ Block Diagram
Vin
Vctrl
+
CURRENT +
LIMIT
-
THERMAL
SHUTDOWN
1.25V +
+
Vout
Vsense
Adj/
GND
„ Pin Configuration
TOP VIEW
TOP VIEW
TOP VIEW
5 Vin
Vsense 1
4 Vctrl
Adj(GND) 2
3 Vout
2 Adj(GND) Vctrl 3
1 Vsense
Vin 4
8 Vout
7 Vout
6 Vout
5 Vout
Tab is Vout
5
4
3
2
1
(AX1184M5)
( AX1184S )
(AX1184T5)
Vin
Vctrl
Vout
Adj(GND)
Vsense
„ Pin Descriptions
Name
Adj
(GND)
Vsense
Vin
Vctrl
Vout
I/O Description
A resistor divider from this pin to the Vout pin and ground sets the output voltage.
(GND only for fixed mode)
I
This pin is the positive side of the reference that allows remote load sensing to
achieve excellent load regulation.
The input of the regulator. Typically a large storage capacitor is connected from this
I
pin to ground to insure that the input voltage does not sag below the minimum
dropout voltage during the load transient response. This pin must always be higher
than Vout in order for the device to regulate.
This pin is the supply pin for the internal control circuit as well as the base drive for
I
the pass transistor. This pin must always by higher than the Vout pin in order the
device to regulate. A minimum of 100uF capacitor must be connected from this pin to
ground to insure stability.
O
The output of the regulator. A minimum of 100uF capacitor must be connected from
this pin to ground to insure stability.
Axelite Confidential Materials, do not copy or distribute without written consent
2/10
Rev.1.0 Jan.16, 2008









No Preview Available !

AX1184 Даташит, Описание, Даташиты
0755-8398 3377 135 9011 2223
http://www.gofotech.com
4A Ultra Low Dropout Positive Linear Regulator
AX1184
„ Absolute Maximum Ratings
Symbol
VIN
Vctrl
PD
TST
TOP
Parameter
Input Voltage
Control Input voltage
Power dissipation
Storage temperature Range
Operation Junction Temperature Range
Rating
12
14
Internally limited
-65 to +150
0 to +150
Unit
V
V
oC
oC
„ Electrical Characteristics
Unless otherwise specified, these specifications apply over, Cin=100uF, Cout=100uF, and Tj=0 to 150oC. Typical value refer to Tj=25oC.
Vout=Vsense.
Sym.
Parameter
VREF Reference Voltage
Line Regulation
Load Regulation
Dropout Voltage
(Vctrl –Vout)
Dropout Voltage
(Vin -Vout)
Current Limit
Minimum Load Current
Test Condition
Io=10mA, Tj=25oC, (Vin-Vout)=0.7V, Vctrl=VIN+1V
IO=10mA, VOUT+0.7V<VIN<12V, TJ =25oC, Vctrl=VIN+1V
0mA<Io<4A, TJ =25oC, (VIN- VOUT)=2V ,Vctrl =VIN + 1V
Vadj=0V for all conditions below.
Vin=2.05V, Io=1.5A
Vin=2.05V, Io=3A
Vin=2.05V, Io=4A
Vadj=0V for all conditions below.
Vctrl =2.75V, Io=1.5A
Vctrl =2.75V, Io=3A
Vctrl =2.75V, Io=4A
Vctrl =2.75V, Vin=2.05V,Vo=100mV, Vadj=0V
Vctrl =5V, Vin=3.3V, Vadj=0V
Min.
1.225
-
-
Typ.
1.250
0.2
-
Max.
1.275
0.5
1
Unit
V
%
%
-
-
-
-
1.15
1.18
V
- 1.10 1.25
-
-
0.26 0.38
0.50 0.60
V
- 0.70 0.85
4.2 -
-A
- 5 10 mA
Thermal Regulation
30mS Pulse
- 0.01 0.02 %/W
Ripple Rejection
Control Pin Current
Vctrl =5V, Vin=5V, Io=4A, Vadj=0V, Tj=25,
Vripple=1Vpp at 120Hz
Vadj=0V for all conditions below.
Vctrl =2.75V, Vin=2.05V, Io=1.5A
Vctrl =2.75V, Vin=2.05V, Io=3A
Vctrl=2.75V, Vin=2.05V, Io=4A
60 70
- dB
- 6 25
- 30 60 mA
- 33 70
IADJ Adjust Pin Current
θ JC
Thermal Resistance
Junction-to-Case
θ JA
Thermal Resistance
Junction-to-Ambient
Vctrl=2.75V, Vin=2.05,Vadj=0
TO-263: Control Circuitry/Power Transistor
TO-220: Control Circuitry/Power Transistor
SOP-8: Control Circuitry/Power Transistor
TO-263: Control Circuitry/Power Transistor
TO-220: Control Circuitry/Power Transistor
SOP-8: Control Circuitry/Power Transistor
- 50 150 µA
- 3.5
- 2.5
- 30
- 25
- 25
- 65
- OC/W
- OC/W
- OC/W
- OC/W
- OC/W
- OC/W
Note : θJA is measured with the PCB copper area(need connect to VSS pins) of approximately 2 in2 (Multi-layer).
Power Dissipations
Package
Max Pd.
TO263/TO220 2.4W~4.4W
SOP8
1W~2W
Remarks
With heat sink or amount of copper board needed.
With heat sink or amount of copper board needed.
Axelite Confidential Materials, do not copy or distribute without written consent
3/10
Rev.1.0 Jan.16, 2008










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