DC1400A Linear Technology, DC1400A Datasheet - Page 2

• Manufacturer Part Number: DC1400A
• Description: BOARD EVAL LTM4608
• Manufacturer: Linear Technology
• Series: LTM®r

Specifications of DC1400A

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V
• Current - Output: 8A
• Voltage - Input: 2.5 ~ 5.5 V
• Regulator Topology: Buck
• Frequency - Switching: 1.5MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LTM4608
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

DEMO MANUAL DC1400A
QUICK START PROCEDURE
Demonstration circuit DC1400A is an easy way to evalu-
ate the LTM4608AEV. Please refer to Figure 1 for proper
measurement equipment setup and follow the procedure
below:
1. Place jumpers in the following positions for a typical
2. With power off, connect the input power supply, load
3. Turn on the power at the input. The output voltage
4. Once the proper output voltage is established, adjust
2
1.2V
and meters as shown in Figure 1. Preset the load to
0A and input power supply between 2.5V to 5.5V.
should be 1.2V ±2%.
the load within the operating range and observe the
output voltage regulation, ripple voltage, effi ciency and
other parameters.
DISABLE
TRACK
OUT
application:
RUN
ON
Figure 2. Proper Scope Probe Technique for Measuring Input or Output Ripple
V
+
–
0A TO
LOAD
V
8A
OUT
1.2V
–
SELECT
A
+
Figure 1. Test Setup of DC1400A
MARGINING
INPUT OR OUTPUT CAPACITOR
NO
+
–
–
V
V
IN
–
+
+
5. To measure the input and output ripple, please refer to
6. For an optional load transient test, apply an adjustable
Note: To disable margining in applications when V
close to V
to a voltage rail equal to 50% of V
divider.
A
+
Figure 2 for proper setup.
pulse signal between IOSTEP CLK and GND pins. The
pulse amplitude sets the current step. The pulse signal
should have very small duty cycle (<5%) to limit the
thermal stress on the transient load circuit. The out-
put current is best monitored with a BNC cable at J5
(10mV/A). The output voltage is best monitored with
a BNC cable at J6.
–
IN
(dropout mode), the MGN pin should be tied
IN
created by a resistor
OUT
dc1400af
is