DC1245A Linear Technology, DC1245A Datasheet - Page 5

• 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