DC1245A Linear Technology, DC1245A Datasheet - Page 5
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DC1245A
Manufacturer Part Number
DC1245A
Description
BOARD DEMO LTM4616
Manufacturer
Linear Technology
Series
µModuler
Specifications of DC1245A
Design Resources
LTM4616 Spice Model LTM4616 Gerber Files DC1245 Design Files
Main Purpose
DC/DC, Step Down
Outputs And Type
2, Non-Isolated
Power - Output
-
Voltage - Output
1.2V, 1.8V
Current - Output
8A, 8A
Voltage - Input
2.7 ~ 5.5 V
Regulator Topology
Buck
Frequency - Switching
1.5MHz
Board Type
Fully Populated
Utilized Ic / Part
LTM4616
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
typical perForMance characteristics
50mV/DIV
1A/DIV
I
V
100
LOAD
1.6
1.4
1.2
0.8
0.6
0.4
0.2
90
80
70
60
50
40
OUT
1
0
2.5
0
Burst Mode Efficiency with
5V Input
Supply Current vs V
Load Transient Response
V
V
2.5A/µs STEP
C
IN
OUT
OUT
0.1
= 5V
= 1.8V
= 2 × 100µF X5R, 470µF 4V POSCAP
0.2
3
V
O
V
0.3
O
= 1.2V Burst Mode OPERATION
INPUT VOLTAGE (V)
LOAD CURRENT (A)
= 1.2V PULSE-SKIPPING MODE
3.5
0.4
0.5
20µs/DIV
4
0.6
IN
0.7
4.5
0.8
V
V
V
OUT
OUT
OUT
0.9
5
= 1.5V
= 2.5V
= 3.3V
1.0
4616 G04
4616 G10
4616 G07
1.1
5.5
50mV/DIV
50mV/DIV
1A/DIV
1A/DIV
I
I
V
LOAD
V
LOAD
3.5
3.0
2.0
1.5
1.0
4.0
2.5
0.5
OUT
OUT
0
2
V
Load Transient Response
Load Transient Response
V
V
2A/µs STEP
C
V
V
2.5A/µs STEP
C
IN
OUT
OUT
IN
IN
OUT
OUT
= 5V
= 5V
to V
= 3.3V
= 2 × 100µF X5R, 470µF 4V POSCAP
= 1.5V
= 2 × 100µF X5R, 470µF 4V POSCAP
I
V
V
OUT
OUT
OUT
OUT
3
= 8A
= 1.2V
= 1.5V
Step-Down Ratio
20µs/DIV
20µs/DIV
V
IN
4
(V)
V
V
V
OUT
OUT
OUT
5
= 1.8V
= 2.5V
= 3.3V
Specified as Each Channel
4616 G05
4616 G08
4616 G11
6
50mV/DIV
50mV/DIV
1A/DIV
1A/DIV
I
I
V
V
LOAD
LOAD
2.0
4.0
3.5
3.0
2.5
1.5
1.0
0.5
OUT
OUT
0
2
Load Transient Response
V
Load Transient Response
V
V
2A/µs STEP
C
V
V
2.5A/µs STEP
C
IN
OUT
OUT
IN
OUT
OUT
IN
= 5V
= 5V
to V
= 2.5V
= 2 × 100µF X5R, 470µF 4V POSCAP
= 1.2V
= 2 × 100µF X5R, 470µF POSCAP
I
V
V
OUT
OUT
OUT
OUT
3
= 6A
= 1.2V
= 1.5V
Step-Down Ratio
20µs/DIV
20µs/DIV
V
LTM4616
IN
4
(V)
V
V
V
OUT
OUT
OUT
5
= 1.8V
= 2.5V
= 3.3V
4616 G12
4616 G09
4616 G06
4616fc
5
6