L6713A STMicroelectronics, L6713A Datasheet - Page 45

• Manufacturer Part Number: L6713A
• Description: IC CTRLR 2/3PH W/DRIVERS 64-TQFP
• Manufacturer: STMicroelectronics

Specifications of L6713A

• Applications: Controller, Intel VR10, VR11, AMD CPU
• Voltage - Input: 12V
• Number Of Outputs: 3
• Voltage - Output: 0.3 ~ 1.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Output Current: 2 A
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6713A
16.2
Figure 19. Soft-start time for Intel mode when using R
AMD mode
Once L6713A receives all the correct supplies and enables, and AMD mode has been
selected, it initiates the soft-start by stepping the reference from zero up to the programmed
VID code
oscillator programmed by the OSC pin, SSOSC pin is not applicable in this case. The soft-
start time results then
where T
programmed by OSC pin. Protections are active during soft-start, UVP is enabled after the
reference reaches 0.6 V while OVP is always active with the fixed 1.800 V threshold (or the
programmed V
Figure 20. Soft-start time for AMD mode
3.5
2.5
1.5
0.5
4
3
2
1
0
0
SS
(See Figure
200
is the time spent to reach V
4.5
3.5
2.5
1.5
0.5
dV
----------------- -
OVP
5
4
3
2
1
0
Rosc [kOhms] to SGND
dT
1
OUT
400
).
=
15); the clock now used to step the reference is the same as the main
(See Figure
Time to 1.6000V
Time to 1.1000V
Switching Frequency per phase
3.125 F
600
Time to Vboot
Time to 1.6000V
⋅
SW
800
[
20):
kkHz
Rssosc [kOhms] vs. SGND
10
SS
1000
]
550
500
450
400
350
300
250
200
150
⇒
and F
T
SS
SW
=
3.5
2.5
1.5
0.5
4
3
2
1
0
---------------------------------------------- -
3.125 F
0
is the main switching frequency
⋅
V
200
100
SS
SW
SSOSC
[
kHz
Rosc [kOhms] to SGND
400
]
versus SGND
Time to 1.6000V
Time to 1.1000V
Switching Frequency per phase
600
1000
800
Soft-start
1000
45/64
550
500
450
400
350
300
250
200
150