DC1297B Linear Technology, DC1297B Datasheet - Page 21

• Manufacturer Part Number: DC1297B
• Description: BOARD EVAL LTM4612
• Manufacturer: Linear Technology
• Series: µModuler

Specifications of DC1297B

• Design Resources: LTM4612 Spice Model LTM4612 Gerber Files DC1297B Design Files DC1297B Schematic
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Power - Output: -
• Voltage - Output: 3.3V, 5V ,12V
• Current - Output: 5A
• Voltage - Input: 5 ~ 36 V
• Regulator Topology: Buck
• Frequency - Switching: 850kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LTM4612
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

applicaTions inForMaTion
22V TO 36V
EXTERNAL 5V SUPPLY
IMPROVES EFFICIENCY—
ESPECIALLY FOR HIGH
INPUT VOLTAGES
V
IN
5V TO 36V
V
C
10µF
50V CERAMIC
IN
IN
Figure 19. Typical 5V to 36V
R5
2M
PULL-UP SUPPLY ≤ 5V
C
10µF
50V CERAMIC
IN
PULL-UP SUPPLY ≤ 5V
R4
100k
R4
100k
R
191k
1%
Figure 18. Typical 22V to 36V
fSET
R3
100k
ON/OFF
C4
0.01µF
ON/OFF
R3
100k
C4
0.01µF
PGOOD
RUN
COMP
INTV
DRV
f
TRACK/SS
V
SET
D
V
PGOOD
RUN
COMP
INTV
DRV
f
TRACK/SS
SGND
CC
SET
C1
10µF
50V
CC
D
IN
LTM4612
SGND
CC
C1
10µF
50V
CC
V
, 3.3V at 5A Design with 400kHz Frequency
IN
LTM4612
V
PGND
IN
MARG0
MARG1
MPGM
PGND
PLLIN
V
FCB
MARG0
MARG1
OUT
V
MPGM
CLOCK SYNC
FB
PLLIN
V
FCB
OUT
V
CLOCK SYNC
IN
FB
, 12V at 5A Design
R1
392k
5% MARGIN
MARGIN
CONTROL
R1
392k
5% MARGIN
MARGIN
CONTROL
4612 F18
4612 F19
R
5.23k
FB
C3
22pF
R
22.1k
FB
C3
22pF
REFER TO TABLE 2
REFER TO TABLE 2
C
22µF
16V
OUT1
C
22µF
6.3V
OUT1
+
+
C
220µF
16V
OUT2
C
220µF
6.3V
LTM4612
OUT2
V
12V
5A
OUT
V
3.3V
5A
OUT
21
4612fb