LTM4616(RevA) 查看數據表（PDF） - Linear Technology

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LTM4616
(Rev.:RevA)

Dual 8A per Channel Low VIN DC/DC µModule

Linear Technology 

LTM4616

APPLICATIONS INFORMATION

Table 3. Output Voltage Response Versus Component Matrix (Refer to Figure 18) 0A to 3A Load Step

TYPICAL MEASURED VALUES

COUT1 VENDORS

TDK

VALUE

22μF, 6.3V

PART NUMBER

C3216X7S0J226M

COUT2 VENDORS

Sanyo POSCAP

VALUE

470μF, 4V

Murata

TDK

22μF, 16V

100μF, 6.3V

GRM31CR61C226KE15L

C4532X5R0J107MZ

CIN (BULK) VENDORS VALUE

Sanyo

100μF, 10V

Murata

100μF, 6.3V

GRM32ER60J107M

PART NUMBER

4TPE470M

PART NUMBER

10CE100FH

VOUT

CIN

(V) (CERAMIC)

1.0

10μF

CIN

(BULK)*

100μF

COUT1

(CERAMIC)

100μF × 2

COUT2

(BULK)

470μF

ITH

C1

C3

None None None

1.0

10μF

100μF 100μF × 2

None None None

1.0

10μF

100μF 100μF × 2

None None None

1.0

10μF

100μF 22μF × 1 470μF None None None

1.2

10μF

100μF 100μF × 2

None None None

1.2

10μF

100μF 22μF × 1 470μF None None None

1.2

10μF

100μF 100μF × 2

None None None

1.2

10μF

100μF 22μF × 1 470μF None None None

1.5

10μF

100μF 100μF × 2

None None None

1.5

10μF

100μF 22μF × 1 470μF None None None

1.5

10μF

100μF 100μF × 1

None None None

1.5

10μF

100μF 22μF × 1 470μF None None None

1.5

10μF

100μF 100μF × 2

None None None

1.5

10μF

100μF 22μF × 1 470μF None None None

1.8

10μF

100μF 100μF × 1

None None None

1.8

10μF

100μF 22μF × 1 470μF None None None

1.8

10μF

100μF 100μF × 2

None None None

1.8

10μF

100μF 22μF × 1 470μF None None None

1.8

10μF

100μF 100μF × 2

None None None

1.8

10μF

100μF 22μF × 1 470μF None None None

2.5

10μF

100μF 100μF × 1

None None None

2.5

10μF

100μF 22μF × 1 470μF None None None

2.5

10μF

100μF 100μF × 1

None None None

2.5

10μF

100μF 22μF × 1 470μF None None None

3.3

10μF

100μF 100μF × 1

None None None

3.3

10μF

100μF 22μF × 1 470μF None None None

*Bulk capacitance is optional if VIN has very low input impedance.

VIN DROOP PEAK-TO- PEAK RECOVERY LOAD STEP RFB

(V) (mV) DEVIATION (mV) TIME (μs)

(A/μs) (kΩ)

5

20

40

40

2.5

14.7

5

30

60

25

2.5

14.7

2.7

30

60

25

2.5

14.7

2.7

25

50

25

2.5

14.7

5

20

40

25

2.5

10

5

20

41

25

2.5

10

2.7

30

60

20

2.5

10

2.7

30

60

25

2.5

10

5

32

64

20

2.5

6.65

5

25

50

25

2.5

6.65

3.3

22

42

25

2.5

6.65

3.3

25

50

25

2.5

6.65

2.7

30

60

25

2.5

6.65

2.7

25

50

25

2.5

6.65

5

42

80

25

2.5

4.87

5

25

50

30

2.5

4.87

3.3

35

70

30

2.5

4.87

3.3

25

50

30

2.5

4.87

2.7

35

70

30

2.5

4.87

2.7

35

20

30

2.5

4.87

5

35

40

30

2.5

3.09

5

32

65

40

2.5

3.09

3.3

50

100

30

2.5

3.09

3.3

32

65

40

2.5

3.09

5

65

135

30

2.5

2.21

5

40

87

40

2.5

2.21

Multiphase operation will reduce effective output ripple as

a function of the number of phases. Application Note 77

discusses this noise reduction versus output ripple cur-

rent cancellation, but the output capacitance will be more

a function of stability and transient response. The Linear

Technology μModule Power Design Tool will calculate the

output ripple reduction as the phase number increases

by N times.

Burst Mode Operation

The LTM4616 is capable of Burst Mode operation on

each regulator in which the power MOSFETs operate

intermittently based on load demand, thus saving quiescent

current. For applications where maximizing the efficiency

at very light loads is a high priority, Burst Mode operation

should be applied. To enable Burst Mode operation, simply

tie the MODE pin to VIN. During this operation, the peak

current of the inductor is set to approximately 20% of

4616fa

11

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