LTM4616 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTM4616' PDF : 30 Pages View PDF
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
GRM31CR61C226K
C4532X5R0J107MZ
CIN (BULK) VENDORS VALUE
SUNCON
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
None
C1
None
C3
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
for those who wish to perform additional stability analysis.
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. LTpowerCAD
also calculates the output ripple reduction as the number
of phases increases.
Burst Mode Operation
The LTM4616 is capable of Burst Mode operation on each
regulator in which the power MOSFETs operate intermit-
tently 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 the maximum
4616ff
12
For more information www.linear.com/LTM4616
Share Link: 
