參數(shù)資料
型號： FAN5365UC06X
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 1.84 A SWITCHING REGULATOR, 6600 kHz SWITCHING FREQ-MAX, PBGA9
封裝： 1.27 X 1.29 MM, 0.40 MM PITCH, WLCSP-9
文件頁數(shù)： 9/24頁
文件大小： 1014K
代理商： FAN5365UC06X
2008 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN5365 Rev. 1.0.4
17
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5
365
—
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Circuit Description
The FAN5365 is a synchronous buck regulator that typically
operates at 6MHz with moderate to heavy load currents. At
light load currents, the converter operates in power-saving
PFM mode. The regulator automatically transitions between
fixed-frequency PWM mode and variable-frequency PFM
mode to maintain the highest possible efficiency over the full
range of load current.
The FAN5365 uses a very fast, non-linear control
architecture to achieve excellent transient response with
minimum-sized external components.
The FAN5365 integrates an I
2C-compatible interface,
allowing transfers up to 3.4Mbps. This communication
interface can be used to:
Dynamically re-program the output voltage in 12.5mV
increments
Reprogram the mode of operation to enable or disable
PFM mode
Control voltage transition slew rate
Enable / disable the regulator.
For more details, refer to the I
2C Interface and Register
Description sections.
Output Voltage Programming
VOUT is programmed according to the following equations:
Option
(12)
VOUT Equation
00, 02, 03
mV
5
.
12
N
75
.
0
V
VSEL
OUT
+
=
(1)
06
mV
5
.
12
N
1875
.
1
V
VSEL
OUT
+
=
(2)
Note:
12. For option 00 and 02, the maximum voltage is 1.4375V.
Table 2. VSEL vs. VOUT
Dec (NVSEL) Binary Hex
00, 02
03
06
0
000000 00
0.7500
1.1875
1
000001 01
0.7625
1.2000
2
000010 02
0.7750
1.2125
3
000011 03
0.7875
1.2250
4
000100 04
0.8000
1.2375
5
000101 05
0.8125
1.2500
6
000110 06
0.8250
1.2625
7
000111 07
0.8375
1.2750
8
001000 08
0.8500
1.2875
9
001001 09
0.8625
1.3000
10
001010 0A
0.8750
1.3125
11
001011 0B
0.8875
1.3250
12
001100 0C
0.9000
1.3375
13
001101 0D
0.9125
1.3500
14
001110 0E
0.9250
1.3625
15
001111 0F
0.9375
1.3750
16
010000 10
0.9500
1.3875
17
010001 11
0.9625
1.4000
18
010010 12
0.9750
1.4125
19
010011 13
0.9875
1.4250
20
010100 14
1.0000
1.4375
21
010101 15
1.0125
1.4500
22
010110 16
1.0250
1.4625
23
010111 17
1.0375
1.4750
24
011000 18
1.0500
1.4875
25
011001 19
1.0625
1.5000
26
011010 1A
1.0750
1.5125
27
011011 1B
1.0875
1.5250
28
011100 1C
1.1000
1.5375
29
011101 1D
1.1125
1.5500
30
011110 1E
1.1250
1.5625
31
011111 1F
1.1375
1.5750
32
100000 20
1.1500
1.5875
33
100001 21
1.1625
1.6000
34
100010 22
1.1750
1.6125
35
100011 23
1.1875
1.6250
36
100100 24
1.2000
1.6375
37
100101 25
1.2125
1.6500
38
100110 26
1.2250
1.6625
39
100111 27
1.2375
1.6750
40
101000 28
1.2500
1.6875
41
101001 29
1.2625
1.7000
42
101010 2A
1.2750
1.7125
43
101011 2B
1.2875
1.7250
44
101100 2C
1.3000
1.7375
45
101101 2D
1.3125
1.7500
46
101110 2E
1.3250
1.7625
47
101111 2F
1.3375
1.7750
48
110000 30
1.3500
1.7875
49
110001 31
1.3625
1.8000
50
110010 32
1.3750
1.8125
51
110011 33
1.3875
1.8250
52
110100 34
1.4000
1.8375
53
110101 35
1.4125
1.8500
54
110110 36
1.4250
1.8625
55
110111 37
1.4375
1.8750
56
111000 38
1.4375
1.4500
1.8875
57
111001 39
1.4375
1.4625
1.9000
58
111010 3A
1.4375
1.4750
1.9125
59
111011 3B
1.4375
1.4875
1.9250
60
111100 3C
1.4375
1.5000
1.9375
61
111101 3D
1.4375
1.5125
1.9500
62
111110 3E
1.4375
1.5250
1.9625
63
111111 3F
1.4375
1.5375
1.9750
VSEL Value
VOUT
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