Performance Summary; Quick Start Procedure - Analog Devices DC3126A Demo Manual

DEMO MANUAL DC3126A

PERFORMANCE SUMMARY

SYMBOL PARAMETER
V HV Regulators Input Voltage (V
IN_HV
V LV Regulators Input Voltage (V
IN_LV
V Output1 Voltage
OUT1
V Output2 Voltage
OUT2
V Output3 Voltage
OUT3
V Output4 Voltage
OUT4
I Maximum Output1 Current
OUT1
I Maximum Output2 Current
OUT2
I Maximum Output3 Current
OUT3
I Maximum Output4 Current
OUT4
f Switching Frequency
SW
EFF Efficiency
*The operating input voltage range for V
**The operating input voltage range for V

QUICK START PROCEDURE

Demonstration circuit 3126A is easy to set up to evalu-
ate the performance of the LT8686S. Refer to Figure 1
for proper measurement equipment setup and use the
following the procedure.
1. With power off, place the jumpers in the following
positions:
JP1 JP2 JP3
EN/UVLO EN2 EN3
ON ON ON
2. With the power off, connect the input power supply
to VEMI+ and VEMI–.
2
Specifications are at T
CONDITIONS
/V ) Range
IN1 IN2
/V ) Range
IN3 IN4
V = 12V
IN_HV
V = 12V
IN_HV
V = 5V
IN_LV
V = 5V
IN_LV
No Load on Downstream Channel
V = 12V, f
IN_HV
V = 12V, f
IN_HV
V = 5V, f
IN_LV
V = 5V, f
IN_LV
and V is 3V to 42V. The 6V minimum input voltage spec is limited by the 5V output voltage.
IN1 IN2
and V is 3V to 8V. The absolute maximum input voltage for V
IN3 IN4
JP4 JP5 JP6
EN4 BIAS SYNC/MODE
ON VOUT1 BURST
= 25°C
A
= 2MHz, V = 5V, I = 1A
SW OUT1 OUT1
= 2MHz, V = 3.3V, I
SW OUT2 OUT2
= 2MHz, V = 1.8V, I
SW OUT3 OUT3
= 2MHz, V = 1.2V, I
SW OUT4 OUT4
3. With the power off, connect the loads from VOUT1,
VOUT2, VOUT3, and VOUT4 to GND.
4. Voltmeters can be placed across the output terminals
to get accurate output voltage measurements.
5. Turn on the power at the input.
NOTE: Make sure that the input voltage does not
exceed 42V.
6. Check for proper output voltages. The output should
be regulated at 5V (±4%), 3.3V (±4%), 1.8V (±4%),
and 1.2V (±4%).
NOTE: If there is no output, temporarily disconnect
the load to ensure that the load is not set too high.
MIN TYP MAX
6* 12
3
4.8 5
3.17 3.3 3.43
1.73 1.8 1.87
1.15 1.2 1.25
2
2
2
2
1.8 2 2.25
93.3
= 1A 90.8
= 1A 92.1
= 1A 88.6
and V is 10V.
IN3 IN4
UNITS
42 V
8** V
5.2 V
V
V
V
A
A
A
A
MHz
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Rev. 0