L6731D STMicroelectronics, L6731D Datasheet - Page 20

• Manufacturer Part Number: L6731D
• Description: IC CTRLR ADJ STPDN SYNC 16-TSSOP
• Manufacturer: STMicroelectronics

Specifications of L6731D

• Applications: Controller, DDR
• Voltage - Input: 1.8 ~ 14 V
• Number Of Outputs: 1
• Voltage - Output: Adjustable down to 0.6V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP
• Output Voltage: 0.6 V to 18 V
• Output Current: 30 A
• Input Voltage: 1.8 V to 14 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Package: HTSSOP16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application details
20/23
Equation 12
Equation 13
Equation 14
Equation 15
Figure 12. Asymptotic bode plot of converter's open loop gain
●
Compensation network design:
–
–
–
–
–
–
Put the gain R
Place
Place
Place
Place
Check the loop gain considering the error amplifier open loop gain.
ω
ω
ω
ω
Z1
Z2
P1
P2
before the output filter resonance
at the output filter resonance
at the output capacitor ESR zero
at one half of the switching frequency;
ϖ
5
/R
ω
C
Z
3
=
2
ω
ω
in order to obtain the desired converter bandwidth
=
R
R
Z
P
1
2
5
3
C
=
=
⋅
20
∆
R
R
⋅
Vin
Vosc
5
(
4
R
1
⋅
⋅
1
1
C
C
3
19
+
20
⋅
ϖ
R
4
LC
)
ω
LC
;
ω
ω
ESR
LC
;
;
L6731D