DC1245A Linear Technology, DC1245A Datasheet - Page 6

• 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

LTM4616
typical perForMance characteristics
pin Functions
V
D1-D2) and (J1-J2, K1-K2, L1-L4, M1-M4): Power Input
Pins. Apply input voltage between these pins and GND
pins. Recommend placing input decoupling capacitance
directly between V
V
F9-F12) and (K9-K12, L9-L12, M9-M12): Power Output
Pins. Apply output load between these pins and GND
pins. Recommend placing output decoupling capacitance
directly between these pins and GND pins. See Table 1.
6
0.5V/DIV
IN1
OUT1
2V/DIV
V
3.0
2.5
2.0
1.5
1.0
0.5
OUT
V
, V
0
IN
, V
0
Start-Up
2.5V Output Current
V
V
C
(DEFAULT 100µs SOFT-START)
IN2
IN
OUT
OUT
= 5V
OUT2
, (BANK1 and BANK2); (F1-F4, E1-E4, C1-C2,
= 1.5V
= 100µF NO LOAD AND 8A LOAD
5
OUTPUT CURRENT (A)
(BANK3 and BANK6); (D9-D12, E9-E12,
IN
50µs/DIV
10
pins and GND pins.
15
4616 G16
4616 G13
20
2V/DIV
2V/DIV
5A/DIV
594
602
600
598
596
592
590
–50
V
Short-Circuit Protection
(2.5V Short, No Load)
V
V
IN
OUT
FB
= 5V
–25
vs Temperature
= 2.5V
V
V
I
OUT
IN
OUT
0
TEMPERATURE (°C)
25
50µs/DIV
GND1 and GND2 (BANK2 and BANK5); (A1-A5, A12, B1-
B5, B7-B12, C3-C12, D3-D7) and (G1-G5, G12, H1-H5,
H7-H12, J3-J12, K3-K7): Power Ground Pins for Both
Input and Output Returns.
SV
Channel. This pin is internally connected to V
a lowpass filter.
SGND1 and SGND2 (F5 and M5): Signal Ground Pin for
Each Channel. Return ground path for all analog and low
power circuitry. Tie a single connection to the output
capacitor GND in the application. See layout guidelines
in Figure 17.
50
IN1
V
V
V
IN
IN
IN
and SV
75
= 5.5V
= 3.3V
= 2.7V
100
Specified as Each Channel
4616 G17
4616 G14
IN2
125
(E5 and L5): Signal Input Voltage for Each
5V/DIV
5V/DIV
5A/DIV
–0.6
–0.1
–0.2
–0.3
–0.4
–0.5
0
0
Load Regulation vs Current
Short-Circuit Protection
(2.5V Short, 4A Load)
V
V
FC MODE
V
V
IN
OUT
IN
OUT
= 5V
V
V
= 3.3V
IN
OUT
= 2.5V
= 1.5V
2
LOAD CURRENT (A)
50µs/DIV
4
IN
I
6
OUT
through
LOAD
4616 G18
4616fc
4616 G15
8