LTC3588EMSE-1/-2
3
QUICK START PROCEDURE
Using short twisted pair leads for any power con-
nections, with all loads and power supplies off, refer
to Figure 1 for the proper measurement and equip-
ment setup.
Follow the procedure below:
1.
Before connecting PS1 to the DC1459B, PS1
must have its current limit set to 50mA. For
most power supplies with a current limit ad-
justment feature the procedure to set the cur-
rent limit is as follows. Turn the voltage and
current adjustment to minimum. Short the
outputs terminals and turn the voltage ad-
justment to maximum. Adjust the current
limit to 50mA. Turn the voltage adjustment to
minimum. The power supply is now current
limited to 50mA.
2.
Initial Jumper, PS and LOAD 1settings:
JP1
= 0
PS1
= OFF
JP2
= 0
LOAD1
= OFF
3.
Connect PS1 to the VIN Terminals, then turn
on PS1 and slowly increase voltage to 2.0V
while monitoring the input current. If the cur-
rent remains less than 5mA, increase PS1 to
17.0V.
4.
Set LOAD1 to 100mA. Verify voltage on VOUT
is within the VOUT 1.8V/3.45V range in Table
1. Verify that the output ripple voltage is be-
tween 40mV and 90mV. Verify that PGOOD is
high (VOUT). Decrease LOAD1 to 5mA.
5.
Decrease PS1 to 0V and move the connection
for PS1 from VIN to PZ1. Slowly increase PS1
voltage to 2.0V while monitoring the input
current. If the current remains less than 5mA,
increase PS1 to 17V. Verify voltage on VOUT
is within the VOUT 1.8V/3.45V range in Table
1.Decrease PS1 to 0V, swap the PZ1 move the
lead connections to PZ2 and repeat the test.
Decrease PS1 to 0V and move the connection
for PS1 from PZ2 to VIN.
6.
Set JP1 to 1. Increase PS1 to 17V and set
LOAD1 to 100mA. Verify voltage on VOUT is
within the VOUT 2.5V/4.1V range in Table 1.
Verify that the output ripple voltage is between
40mV to 90mV.
7.
Set JP1 to 0 and JP2 to 1. Set LOAD1 to
100mA. Verify voltage on VOUT is within the
VOUT 3.3V/4.5V range in Table 1. Verify that
the output ripple voltage is between 50mV and
90mV.
8.
Set JP1 to 1 and JP2 to 1. Set LOAD1 to
100mA. Verify voltage on VOUT is within the
VOUT 3.6V/5.0V range in Table 1. Verify that
the output ripple voltage is between 60mV and
110mV.
9.
Decrease LOAD1 to 1mA. Turn off PS1 and
insert a 1K ohm resistor between the positive
lead of the PS1 and the VIN turret. Turn on
PS1 and while monitoring the voltage on VIN,
increase PS1 until the voltage on VIN is 3V be-
low the voltage on PS1. Verify input voltage,
VIN, V
SHUNT
of 19.0V to 21.0V.
10.
Turn off PS1 and LOAD1.