Performance Summary; Quick Start Procedure - Linear Technology DC2367A Demo Manual

DEMO MANUAL DC2367A

PERFORMANCE SUMMARY

PARAMETER
Input Voltage Range
Output Voltage V (VDDQ)
OUT1
Maximum Continuous Output Current I
Output Voltage V (VTT)
OUT2
Maximum Continuous Output Current I
Default Operating Frequency
Efficiency

QUICK START PROCEDURE

Demonstration circuit DC2367A is an easy way to evaluate
the performance of the LTM4632. Please refer to Figure 1
for test setup connections and follow the procedure below.
1. With power off, place the jumpers in the following
positions for a typical application for 2.5V
1.25V rails:
OUT2
JP1
RUN1 RUN2
ON
2. Before powering up the input supply and loads, preset
the input voltage supply to be between 3.6V to 15V.
Preset the load current for each output rail to 0A.
2
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CONDITIONS
Resistor Programmable, Jumper Selectable
Derating Is Necessary for Certain Operating
OUT1
Conditions. See Data Sheet for Details
V = 1.5V
OUT1
V = 1.8V
OUT1
V = 2.5V
OUT1
Derating Is Necessary for Certain Operating
OUT2
Conditions. See Data Sheet for Details
V = 12V, V
IN
V = 12V, V
IN
JP2 JP3 JP4
TRACK/SS MODE
ON SS CCM
Specifications are at T = 25°C
A
= 2.5V, I = 3A, f = 1MHz
OUT1 OUT SW
= 1.25V, I = 3A, f = 1MHz
OUT2 OUT SW
3. With power off, connect the loads, input voltage supply
and meters as shown in Figure 1.
4. Turn on the input power supply. The output voltage me-
ters for each output rail should display the programmed
and output voltage ±1.5%.
OUT1
5. Once the proper output voltages are established, ad-
just the load current on each rail within the 0A to 3A
JP6
range and observe each output rail's load regulation,
VDDQ SEL
efficiency, and other parameters.
2.5V
6. To observe increased light load efficiency place the
mode pin jumper (JP4) in the BURST MODE position.
MIN TYP MAX
3.6 15
1.5 (±1.5%)
1.8 (±1.5%)
2.5 (±1.5%)
3
0.75
0.9
1.25
±3
1
83.9
(See Figure 2)
72.3
(See Figure 3)
UNITS
V
V
V
V
A
V
V
V
A
MHz
%
%
dc2367af