Performance Summary; Quick Start Procedure - Linear Technology DC2166A Demo Manual

DEMO MANUAL DC2166A

performance summary

PARAMETER
Input Voltage Range
Output Voltages
Maximum Continuous Output Current
Operating Frequency
Efficiency
Load Transient

Quick start proceDure

Demonstration circuit DC2166A is an easy way to evalu-
ate the performance of the LTM4639EY. 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
application:
RUN TRACK/SS
ON SOFT-START
2. With power off, connect the input power supply, load
and meters as shown in Figure 1. Preset the load to 0A
and V supply to 3.3V.
IN
3. Turn on the power supply at the input. The output volt-
age should be 1.0V ± 1.5% (0.985V to 1.015V).
4. Vary the input voltage from 2.375V to 7V and adjust
the load current from 0A to 20A. Observe the output
voltage regulation, ripple voltage, efficiency, and other
parameters.
2
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CONDITIONS/NOTES
Derating is necessary for certain operating conditions.
See data sheet for details.
V = 3.3V, I
IN OUT
V = 3.3V, V
IN OUT
V
OUT
MODE SELECT CPWR SELECT
CCM 1.0V BOOST
= 20A
= 1.0V, I = 0A to 10A
STEP
5. (Optional) For optional load transient test, apply an
adjustable pulse signal between IOSTEP_CLK and GND
test points. The pulse amplitude sets the load step cur-
rent amplitude. Keep the pulse width short (<1ms) and
pulse duty cycle low (<5%) to limit the thermal stress
on the load transient circuit.
6. (Optional) LTM4639 can be synchronized to an external
clock signal. Place the JP3 jumper on EXTCLK and apply
a clock signal (0V to 5V, square wave) on the CLKIN
test point.
7. (Optional) The outputs of LTM4639 can track another
supply by setting JP1 to EXT. TRACK. If tracking external
voltage is selected, the corresponding test point TRACK
need to be connected to a valid voltage signal.
VALUE
2.375V to 7V
1.0V, 1.2V, 1.5V, 1.8V ± 1.5%
20ADC
500kHz
83.2% (V = 1.0V) (Figure 2)
OUT1
85.3% (V = 1.2V) (Figure 2)
OUT1
87.7% (V = 1.5V) (Figure 2)
OUT1
89.1% (V = 1.8V) (Figure 2)
OUT1
156mV (Figure 4)
dc2166af