参数资料
型号: LTM4608IV#PBF
厂商: Linear Technology
文件页数: 12/26页
文件大小: 0K
描述: IC DC/DC UMODULE 8A 68-LGA
产品培训模块: Power Module vs. Discrete DC to DC
软件下载: LTM4608 Spice Model
产品目录绘图: LTM Series_9x15x2.8
设计资源: LTM4608IV#PBF Footprint.bxl
特色产品: μModule Products
标准包装: 170
系列: µModule®
类型: 非隔离(POL)
输出数: 1
电压 - 输入(最小): 2.7V
电压 - 输入(最大): 5.5V
Voltage - Output 1: 0.6 ~ 5 V
电流 - 输出(最大): 8A
安装类型: 表面贴装
封装/外壳: 68-LGA
尺寸/尺寸: 0.59" L x 0.35" W x 0.11" H(15.0mm x 9.0mm x 2.8mm)
包装: 托盘
工作温度: -40°C ~ 85°C
效率: 98%
产品目录页面: 2711 (CN2011-ZH PDF)
LTM4608
APPLICATIONS INFORMATION
Table 3. Output V oltage    Response Versus Component Matrix (Refer to Figure 18) 0A to 3A Load Step
TYPICAL MEASURED VALUES
C OUT1 VENDORS VALUE
PART NUMBER
C OUT2 VENDORS
VALUE
PART NUMBER
TDK
Murata
TDK
22μF, 6.3V
22μF, 16V
100μF, 6.3V
C3216X7S0J226M
GRM31CR61C226KE15L
C4532X5R0J107MZ
Sanyo POSCAP
C IN (BULK) VENDORS
Sanyo
150μF, 10V
VALUE
100μF, 10V
10TPD150M
PART NUMBER
10CE100FH
Murata
100μF, 6.3V
GRM32ER60J107M
V OUT
(V)
1.0
1.0
1.0
1.0
1.0
1.0
1.2
1.2
1.2
1.2
1.2
1.2
1.5
1.5
1.5
1.5
1.5
1.5
1.8
1.8
C IN
(CERAMIC)
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
10μF
C IN
(BULK)*
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
100μF
C OUT1
(CERAMIC)
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 2
22μF × 1
100μF × 1
22μF × 1
C OUT2
(BULK)
150μF × 2
150μF × 2
150μF × 2
150μF × 2
150μF × 2
150μF × 2
150μF × 2
150μF × 2
150μF × 2
150μF × 2
I TH
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
None
C1
68pF
None
68pF
None
68pF
None
100pF
None
100pF
None
100pF
47pF
100pF
None
100pF
None
100pF
None
47pF
None
C3
None
100pF
None
100pF
None
100pF
None
100pF
None
100pF
None
None
None
47pF
None
47pF
None
None
None
47pF
V IN
(V)
5
5
3.3
3.3
2.7
2.7
5
5
3.3
3.3
2.7
2.7
5
5
3.3
3.3
2.7
2.7
5
5
DROOP
(mV)
13
17
13
17
13
17
16
20
16
20
16
16
18
20
16
20
18
20
22
21
PEAK-TO- PEAK
DEVIATION (mV)
26
34
26
34
26
34
32
41
32
41
32
32
36
41
32
41
36
41
42
42
RECOVERY
TIME (μs)
7
8
7
10
7
8
8
10
8
10
10
8
8
12
10
12
10
12
8
12
LOAD STEP
(A/μs)
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
R FB
(kΩ)
14.7
14.7
14.7
14.7
14.7
14.7
10
10
10
10
10
10
6.65
6.65
6.65
6.65
6.65
6.65
4.87
4.87
1.8 10μF 100μF 100μF × 2
None
120pF
None
3.3
21
43
12
3
4.87
1.8 10μF 100μF 22μF × 1 150μF × 2 None
None
47pF
3.3
21
41
12
3
4.87
1.8 10μF 100μF 100μF × 2
None
120pF
None
2.7
22
44
12
3
4.87
1.8 10μF 100μF 22μF × 1 150μF × 2 None
None
None
2.7
21
42
14
3
4.87
2.5 10μF 100μF 100μF × 1
None
100pF
None
5
28
42
10
3
3.09
2.5 10μF 100μF 22μF × 1 150μF × 1 None
22pF
None
5
33
60
10
3
3.09
2.5 10μF 100μF 100μF × 1
None
100pF
None
3.3
30
60
10
3
3.09
2.5 10μF 100μF 22μF × 1 150μF × 1 None
22pF
None
3.3
21
41
10
3
3.09
3.3 10μF 100μF 100μF × 1
100pF
22pF
None
5
38
74
10
3
2.21
3.3 10μF 100μF 22μF × 1 150μF × 1 None
None
None
5
39
75
12
3
2.21
*Bulk capacitance is optional if V IN has very low input impedance.
Forced Continuous Operation
In applications where fixed frequency operation is more
critical than low current efficiency, and where the lowest
output ripple is desired, forced continuous operation should
be used. Forced continuous operation can be enabled by
tying the MODE pin to GND. In this mode, inductor cur-
rent is allowed to reverse during low output loads, the I TH
voltage is in control of the current comparator threshold
throughout, and the top MOSFET always turns on with each
oscillator pulse. During start-up, forced continuous mode
is disabled and inductor current is prevented from revers-
ing until the LTM4608’s output voltage is in regulation.
Multiphase Operation
For output loads that demand more than 8A of current,
multiple LTM4608s can be cascaded to run out of phase to
4608fd
12
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