ISL6420BEVAL2Z Intersil, ISL6420BEVAL2Z Datasheet - Page 2

• Manufacturer Part Number: ISL6420BEVAL2Z
• Description: EVAL BOARD 2 FOR ISL6420B
• Manufacturer: Intersil

Specifications of ISL6420BEVAL2Z

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 3 shows the start-up profile of the regulator in
relation to the start-up of the input supply.
The second method of start-up is through the use of the
enable feature. Holding the ENSS pin on the ISL6420B
below 1V will disable the regulator by forcing both the
upper and lower MOSFETs off. Releasing the pin allows
the regulator to start-up.
ENSS
V
PHASE
ENSS
V
V
V
PHASE
OUT
IN
OUT
IN
V
FIGURE 4. ENABLE USING ENSS
IN
FIGURE 3. POWER-UP OF V
V
= 18V, V
IN
= 18V, V
OUT
OUT
2
= 3.3V, I
= 3.3V, I
OUT
OUT
= 10A
IN
Application Note 1504
= 10A
Shutdown
If the ENSS pin is pulled down and held below 1V, the
regulator will be turned off. Figure 5 shows the shutdown
profile of the regulator with the ENSS pin pulled low.
Figure 6 shows the shutdown of the regulator when
powering down the input supply
V
ENSS
V
ENSS
PHASE
PHASE
V
V
OUT
OUT
IN
IN
FIGURE 5. SHUTDOWN USING ENSS
FIGURE 6. POWER-DOWN OF V
November 23, 2009
IN
AN1504.0