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| 型號(hào)： | LX8817-25CDFT |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁(yè)數(shù)： | 3/8頁(yè) |
| 文件大?。?/td> | 217K |
| 代理商： | LX8817-25CDFT |
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright
2000
Rev. 0.3D, 2002-01-08
W
M
.
C
LX8817
Dual Channel 2.5A Low Dropout Regulator
P
RODUCTION
D
ATA
S
HEET
L I N F I N I T Y D I V I S I O N
R E C O M M E N D E D M A X O P E R A T I N G C O N D I T I O N
LX8817-25
Typ
Parameter
Symbol
Min
Max
Units
V
CTRL
V
PWR
I
1,
I
2
T
J
10
7.5
3.0
125
V
V
A
°
C
Input Voltage
Load Current (Internally Limited)
Operating Junction Temperature
E L E C T R I C A L C H A R A C T E R I S T I C S
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0
°
C
≤
T
A
≤
125
°
C except where
otherwise noted and the following test conditions: V
CTRL
= 5V, V
PWR
= 3.3V I
OUT
= 5mA, C
1, 2, 3, 4
= 10
μ
F (Tantalum), and T
J
= T
A
using
low duty cycling methods.
LX8817-25
Typ
Parameter
Symbol
Test Conditions
Min
Max
Units
!
FIXED OUTPUT
Output Voltage
LX8817-2500
Line Regulation
Load Regulation
V
1
5mA < I
1
< 2.5A, 3.75V < V
CTRL
< 10V
3.3V < V
PWR
< 5.5V
3.3V<V
CTRL
<10V, 3.3V<V
PWR
<5.5V, I
1
= 5mA
5mA < I
1
< 2.5A, V
CTRL
=5V, V
PWR
=3.3V
I
1
= 2.5A,
V
1
= -2%
I
1
= 2.0A,
V
1
= -2%
I
1
= 1.0A,
V
1
= -2%
Note 1
2.438
2.500
2.538
V
V
1
(V
IN
)
V
1
(I
1
)
1
1
5
5
mV
mV
Dropout Voltage (PWR)
V
PWR
-V
1
0.500
0.375
0.225
3.0
0
0.730
0.580
0.390
5
V
Current Limit
Minimum Load Current
!
ADJUSTABLE OUTPUT
I
1 (MAX)
I
1
2.55
A
mA
Reference Voltage
V
2
5mA < I
2
< 2.5A, 3.75V < V
CTRL
< 10V
3.3V < V
PWR
< 5.5V
3.3V<V
CTRL
<10V, 3.3V<V
PWR
<5.5V, I
2
= 5mA
5mA < I
2
< 2.5A, V
CTRL
=5V, V
PWR
=3.3V
I
2
= 2.5A,
V
2
= -2%
I
2
= 2.0A,
V
2
= -2%
I
2
= 1.0A,
V
2
= -2%
Note 1
V
PWR
Rising, 3.0V<V
CTRL
< 10V, Both Outputs Off
I
1
=I
2
=5mA
I
1
=I
2
=2.5A
f=120Hz, T
J
= 25
°
C
10Hz < f < 10kHz
1.231
1.250
1.288
V
Line Regulation
Load Regulation
V
2
(V
IN
)
V
2
(I
2
)
0.05
10
0.500
0.375
0.225
3.0
1
1
3
6
75
0.003
160
3
19
0.730
0.580
0.390
5
2
2.6
3.3
2.2
5
10
mV
mV
Dropout Voltage
V
PWR
-V
2
V
Current Limit
Minimum Load Current
Adjust Pin Bias Current
!
ENTIRE REGULATOR
Under Voltage Lockout
Ripple Rejection
RMS Output Noise
Thermal Shutdown
Note 1: Minimum load current is defined as the amount of output current required to maintain regulation. Typically this current provides the bias to the external resistor divider
network used to set the output voltage.
I
2 (MAX)
I
2
I
ADJ
2.55
60
A
mA
μ
A
V
V
V
mA
mA
dB
%V
OUT
°
C
V
PWR
V
CONTROL
Minimum Operating Voltage
Quiescent Current
I
Q
PSRR
T
JSD
E
L
E
C
T
R
I
C
A
L
S
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