SP6133 Datasheet, PDF (14/20 Pages) Sipex Corporation – Synchronous Buck Controller

Gain
(dB)
Condition:
CZ2 >> CP1, R1 >> RZ3
APPLICATION INFORMATION
Error Amplifier Gain
Bandwidth Product
20 Log (RZ2/R1)
Frequency
(Hz)
Figure 6: Bode Plot of Type III Error AmplifierCompensation
Note: Loop Compensation component calculations discussed in this
Datasheet can be quickly iterated with the Type III Loop Compensation
Calculator on the web at:
www.sipex.com/files/Application-Notes/TypeIIICalculator.xls
Manufacturer/Part No.
Inductance
(uH)
Inter-Technical SC5018-2R7M
2.7
Manufacturer/Part No.
Capacitance
(uF)
TDK C3225X7R1C226M
22
TDK C3225X5R0J107M
100
Manufacturer/Part No. MOSFET
Vishay Si4394DY
Vishay Si4320DY
N-Channel
N-Channel
INDUCTORS - SURFACE MOUNT
Series R
Inductor Specification
Isat
Size
Inductor Type
Manufacturer
Website
mOhms
(A)
LxW(mm) Ht.(mm)
4.10
15.0 12.6x12.6 4.5 Shielded Ferrite Core www.inter-technical.com
CAPACITORS - SURFACE MOUNT
Capacitor Specification
ESR Ripple Current Size
Voltage Capacitor
Manufacturer
Website
ohms (max) (A) @ 45C LxW(mm) Ht.(mm) (V)
Type
0.005
4.00
3.2x2.5 2.0 16.0 X7R Ceramic www.tdk.com
0.005
4.00
3.2x2.5 2.5 6.3 X5R Ceramic www.tdk.com
MOSFETS - SURFACE MOUNT
RDS(on)
mΩ (max)
9.75
4
MOSFET Specification
ID Current Qg
Voltage
(A)
nC (Typ) nC (Max) (V)
14
12.5
- 30
22
45
70 30
Foot Print
SO-8
SO-8
Manufacturer
Website
www.vishay.com
www.vishay.com
Note: Components highlighted in bold are those used on the SP6133 Evaluation Board.
Table 1. Input and Output Stage Components Selection Charts
Oct 24-06 Rev L
SP6133 Synchronous Buck Controller
14
© 2006 Sipex Corporation