DC1386B Linear Technology, DC1386B Datasheet - Page 6

• Manufacturer Part Number: DC1386B
• Description: BOARD DEMO LTM8032
• Manufacturer: Linear Technology
• Series: µModuler

Specifications of DC1386B

• Design Resources: LTM8032 Spice Model DC1386B Design Files DC1386B Schematic LTM8032 Gerber Files
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Power - Output: -
• Voltage - Output: 3.3V
• Current - Output: 2A
• Voltage - Input: 5.5 ~ 36 V
• Regulator Topology: Buck
• Frequency - Switching: 600kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LTM8032EV
• Lead Free Status / Rohs Status: Not applicable / Not applicable

LTM8032
TYPICAL PERFORMANCE CHARACTERISTICS
PIN FUNCTIONS
V
internal regulator and to the internal power switch. This
pin must be locally bypassed with an external, low ESR
capacitor of at least 2.2μF .
FIN (K3, L3): Filtered Input. This is the node after the input
EMI fi lter. Use this only if there is a need to modify the
behavior of the integrated EMI fi lter or if V
rapidly; otherwise, leave these pins unconnected. See the
Applications Information section for more details.
GND (Bank 2): Tie these GND pins to a local ground plane
below the LTM8032 and the circuit components. Return
the feedback divider (R
V
capacitor and the output load between these pins and
GND pins.
AUX (Pin H5): Low Current Voltage Source for BIAS. In
many designs, the BIAS pin is simply connected to V
The AUX pin is internally connected to V
adjacent to the BIAS pin to ease printed circuit board rout-
ing. Although this pin is internally connected to V
not connect this pin to the load. If this pin is not tied to
BIAS, leave it fl oating.
6
IN
OUT
(Bank 3): The V
50
45
40
35
30
25
20
15
10
5
0
(Bank 1): Power Output Pins. Apply the output fi lter
Temperature Rise vs
Load Current, V
0
500
LOAD CURRENT (mA)
1000
IN
OUT
pin supplies current to the LTM8032’s
1500
ADJ
= 10V
) to this net.
2000
24V
36V
8032 G19
IN
IN
2500
OUT
IN
and is placed
–10
rises or falls
90
70
50
30
10
Radiated Emissions
0
V
V
IN
OUT
100 200 300 400 500
= 36V
OUT
= 10V AT 2A
OUT
, do
FREQUENCY (MHz)
.
BIAS (Pin H4): The BIAS pin connects to the internal power
bus. Connect to a power source greater than 2.8V. If the
output is greater than 2.8V, connect this pin to AUX. If the
output voltage is less, connect this to a voltage source
between 2.8V and 25V. Also, make sure that BIAS + V
is less than 56V.
RUN/SS (Pin L5): Pull RUN/SS pin to less than 0.2V to
shut down the LTM8032. Tie to 2.5V or more for normal
operation. If the shutdown feature is not used, tie this pin
to the V
see the Applications Information section.
RT (Pin G7): The RT pin is used to program the switching
frequency of the LTM8032 by connecting a resistor from
this pin to ground. The Applications Information section of
the data sheet includes a table to determine the resistance
value based on the desired switching frequency. Minimize
capacitance at this pin.
SHARE (Pin H7): Tie this to the SHARE pin of another
LTM8032 when paralleling the outputs. Otherwise, do
not connect.
600 700 800 900 1000
IN
pin. RUN/SS also provides a soft-start function;
T
A
8031 G20
= 25°C, unless otherwise noted.
–10
90
70
50
30
10
0
Radiated Emissions
V
V
IN
OUT
100 200 300 400 500
= 13V
= 10V AT 2A
FREQUENCY (MHz)
600 700 800 900 1000
8031 G21
8032fc
IN