ZY7015L-T3 POWER ONE, ZY7015L-T3 Datasheet - Page 19

• Manufacturer Part Number: ZY7015L-T3
• Description: Module DC-DC 1-OUT 0.5V to 5.5V 15A 25-Pin SMT T/R
• Manufacturer: POWER ONE
• Type: Step Downr

Specifications of ZY7015L-T3

• Package: 25SMT
• Output Current: 15 A
• Output Voltage: 0.5 to 5.5 V
• Input Voltage: 3 to 13.2 V
• Number Of Outputs: 1
• Switching Regulator: Yes

Figure 31. Transient Response with Optimal Voltage
8.2
Turn-on delay, turn-off delay, and rising and falling
output voltage slew rates can be programmed in the
GUI Sequencing/Tracking window shown in Figure
32 or directly via the I
DOF, and TC registers, respectively. The registers
are shown in Figure 33, Figure 34, and Figure 36.
8.2.1
Turn-on delay is defined as an interval from the
application of the Turn-On command until the output
voltage starts ramping up.
ZD-00283 Rev. 2.5, 01-Jul-10
Sequencing and Tracking
Figure 32. Sequencing/Tracking Window
Positioning
Turn-On Delay
2
C bus by writing into the DON,
www.power-one.com
ZY7015 15A DC-DC Intelligent POL Data Sheet
3V to 13.2V Input
8.2.2
Turn-off delay is defined as an interval from the
application of the Turn-Off command until the output
voltage reaches zero (if the falling slew rate is
programmed) or until both high side and low side
switches are turned off (if the slew rate is not
programmed). Therefore, for the slew rate controlled
turn-off the ramp-down time is included in the turn-off
delay as shown in Figure 35.
Figure 35. Relationship between Turn-Off Delay and Falling
As it can be seen from the figure, the internally
calculated delay T
below.
For proper operation T
The appropriate value of the turn-off delay needs to
be programmed to satisfy the condition.
Bit 7:0 DON[7:0]: Turn-on delay time
Bit 7:6 Unimplemented, read as ‘0’
Bit 5:0 DOF[5:0]: Turn-off delay time
Internal
ramp-down
command
R/W-0
DON7
Turn-Off
Command
Bit 7
Bit 7
---
U
00h: corresponds to 0ms delay after turn-on command has occurred
…
FFh: corresponds to 255ms delay after turn-on command has occurred
00h: corresponds to 0ms delay after turn-off command has occurred
…
3Fh: corresponds to 63ms delay after turn-off command has occurred
V
Slew Rate
Figure 33. Turn-On Delay Register DON
OUT
Figure 34. Turn-Off Delay Register DOF
Turn-Off Delay
R/W-0
DON6
---
U
R/W-0
DON5
R/W-0
DOF5
T
D
Calculated
D
delay T
User programmed turn-off delay, T

is determined by the equation
T

R/W-0
DON4
R/W-0
DOF4
DF
D
0.5V to 5.5V Output
D
shall be greater than zero.

dV
Ramp-down time, T
R/W-0
DON3
R/W-0
DOF3
V
OUT
F
dT
Page 19 of 34
Falling slew
R/W-0
DON2
R/W-0
DOF2
rate dV
,
F
/dT
F
R/W-0
DON1
R/W-0
DOF1
DF
Time
R/W-0
R/W-0
DON0
DOF0
Bit 0
Bit 0