ISL6125EVAL1Z Intersil, ISL6125EVAL1Z Datasheet - Page 19

• Manufacturer Part Number: ISL6125EVAL1Z
• Description: EVALUATION BOARD FOR ISL6125
• Manufacturer: Intersil

Specifications of ISL6125EVAL1Z

• Main Purpose: Power Management, Power Supply Supervisor/Tracker/Sequencer
• Embedded: No
• Utilized Ic / Part: ISL6125
• Primary Attributes: 4 Channel Power Supply Sequencer
• Secondary Attributes: Undervoltage Protection
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Voltage Tracking
In some applications the various voltages may have to track
each other as they ramp up and down, whereas others may
just need sequencing. In these cases, tracking can be
accomplished and has been demonstrated over a wide
range of load current (1A to 10A) and load capacitance
(10µF to 3300µF) with the ISL612X family. Figure 21 and
Figure 22 illustrate output voltage ramping tracking
performance. Note that differences are less than 0.5V. With
the relevant GATE pins tied together in a star pattern so that
the resistance between any two GATE pins is equivalent
(1k to 10k), which results in a sharing of the GATE ramping
voltage and with the same or similar enough FETs this
behavior is observed.
It is suggested that this circuit implementation be prototyped
and evaluated for the particular expected loads prior to
committing to manufacturing build.
SUPPLY
ENABLE
POWER
FIGURE 20. MULTIPLE ISL612X SERIAL CONFIGURATION
ISL6123, ISL6124, ISL6125, ISL6126, ISL6127, ISL6128, ISL6130
SYSRST
UVLO
ENABLE
19
SYSRST
RESET
UVLO
ISL6125
RESET
ISL6124
# N
RESET
RESET
ENABLE
# N+1
O
G
L
C
G
A
T
E
I
OE
LOW = RESET
TO LOGIC
INPUT
FIGURE 21. OUTPUT VOLTAGE ON LOW TO HIGH TRACKING
FIGURE 22. OUTPUT VOLTAGE HIGH TO LOW TRACKING
October 15, 2008
FN9005.10