參數(shù)資料
型號： FAN5182
廠商： Fairchild Semiconductor Corporation
英文描述： Adjustable Output 1, 2, or 3-Phase Synchronous Buck Controller
中文描述： 可調(diào)輸出1，2或3相同步降壓控制器
文件頁數(shù)： 4/18頁
文件大小： 788K
代理商： FAN5182
4
www.fairchildsemi.com
FAN5182 Rev. 1.0.1
F
Electrical Characteristics
V
CC
= 12V, FBRTN = GND.
●
Indicates specifications over operating ambient temperature range. (Note 1)
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Units
OSCILLATOR
Frequency Range
f
OSC
●
0.25
3
MHz
Frequency Variation
f
PHASE
R
T
A
= 25°C, R
T
A
= 25°C, R
R
T
= 100k
RAMPADJ - FB - 2K
(with I
RAMPADJ
T
T
T
to GND
= 332k
= 154k
= 100k
, 3-phase
, 3-phase
, 3-phase
●
155
200
400
600
245
kHz
Output Voltage
V
RT
2.0
V
RAMPADJ Output Voltage
V
RAMPADJ
x I
RAMPADJ
μ
set to 20
●
-50
+50
mV
RAMPADJ Input Current
Range (Note 2)
I
RAMPADJ
0
100
μ
A
VOLTAGE ERROR AMPLIFIER
Output Voltage Low
0.3
V
Output Voltage High
3.1
V
Accuracy
V
FB
Referenced to FBRTN
●
784
800
816
mV
Input Bias Current
I
FB
V
FB = 800mV
●
-4
±1
+4
μ
A
Line Regulation
FB
V
CC
= 10V to 14V
0.05
%
FBRTN Current
I
FBRTN
●
100
140
μ
μ
A
Output Current
I
O(ERR)
FB forced to V
OUT
- 3%
500
A
DC Gain (Note 2)
87
dB
Gain Bandwidth Product
(Note 2)
G
BW(ERR)
COMP = FB
20
MHz
Slew Rate (Note 2)
C
COMP
= 10pF
10
V/
μ
s
CURRENT SENSE AMPLIFIER
Offset Voltage
V
OS(CSA)
CSSUM-CSREF ( See Figure 1.)
●
-5.5
+5.5
mV
Input Bias Current
I
BIAS(CSSUM)
●
-50
+50
nA
DC Gain (Note 2)
70
dB
Gain Bandwidth Product
(Note 2)
GBW
(CSA)
10
MHz
Slew Rate (Note 2)
C
CSCOMP
CSSUM & CSREF
= 10pF
10
V/
μ
s
Input Common-Mode Range
0
V
CC
0.1
-2.5
V
Output Voltage Low
V
Output Voltage High
V
CC
-2.5
V
Output Current
I
CSCOMP
500
μ
A
CURRENT BALANCE CIRCUIT
Common-Mode Range
(Note 2)
V
SW(X)CM
-600
+200
mV
Input Resistance
R
SW(X)
SW(X) = 0V
●
20
30
40
k
Input Current
I
SW(X)
I
SW(X)
SW(X) = 0V
●
4
7
10
μ
A
Input Current Matching
SW(X) = 0V
●
-7
+7
%
CURRENT LIMIT COMPARATOR
Output Voltage: Normal Mode
V
ILIMIT(NM)
EN > 2V, R
ILIMIT
= 250k
μ
●
2.9
3
3.1
V
Output Voltage: Shutdown
Mode
V
ILIMIT(SD)
EN < 0.8V, I
ILIMIT
= -100
A
●
400
mV
Output Current: Normal Mode
I
ILIMIT(NM
)
EN > 2V, R
ILIMIT
= 250k
12
μ
μ
A
Maximum Output Current
●
60
A
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