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DEMO MANUAL DC1295B
QUICK START PROCEDURE
Demonstration circuit DC1295B is an easy way to evaluate
the performance of the LTM4606EV. 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
1.5V OUT application:
5. The very low ripple of the LTM4606 requires proper
measurement technique. Input ripple can be measured
with a typical scope probe, but you should not use the
ground clip lead. See Figure 2 for an illustration of how
to connect to the input capacitor. The output ripple
should be measured with a 50Ω BNC cable connected
to J6.
FCB
CCM
MARG1
LO
MARG0
LO
RUN
ON
VOUT
SELECT
1.5V
6. For the optional load transient test, apply an adjust-
able pulse signal between IOSTEP_CLK and GND pins.
Pulse amplitude sets the current step. The pulse signal
2. With power off, connect the input power supply, load
and meters as shown in Figure 1. Preset the load to 0A
and V IN supply to be 12V.
3. Turn on the power at the input. The output voltage
should be 1.5V ±2% (1.47V ~ 1.53V).
should have very small duty cycle (<5%) to limit the
thermal stress on the transient load circuit. The output
transient current can be monitored at BNC connector
J5 (10mV/A), the output voltage can be monitored at
BNC connector J6.
4. Once the proper output voltage is established, adjust the
load within the operating range and observe the output
voltage regulation, efficiency and other parameters.
dc1295bf
2
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