SP6136 Datasheet, PDF (14/18 Pages) Sipex Corporation – Synchronous Buck Controller

Gain
(dB)
Condition:
C22 >> CP1, R1 >> RZ3
APPLICATION INFORMATION
Error Amplifier Gain
Bandwidth Product
20 Log (RZ2/R1)
Frequency
(Hz)
Figure 6: Bode Plot of Type III Error Amplifier Compensation
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
INDUCTORS - SURFACE MOUNT
Inductance
(uH)
Manufacturer
2.2
Inter-
Technical
Part No.
Series R
m
Inductor Specification
Isat
Size
(A) LxW(mm) Ht.(mm)
Inductor Type
Manufacturer
Website
SC7232-2R2M 10.4 13.00 7.2x6.6 3.20 Shielded Ferrite Core www.inter-technical.com
CAPACITORS - SURFACE MOUNT
Capacitance
(uF)
Manufacturer
Part No.
Capacitor Specification
ESR Ripple Current
Size
Voltage
 (max) (A) @ 45°C LxW(mm) Ht.(mm) (V)
Capacitor
Type
22
TDK C3225X5R1C226M ^{0.005 4.00}
3X2 2.00 16.0 X5R Ceramic
100
TDK C3225X5R0J107M 0.005 4.00
3X2 2.00 6.3 X5R Ceramic
MOSFETS - SURFACE MOUNT
Manufacturer
Website
www.TDK.com
www.TDK.com
MOSFET Manufacturer
N-Ch VISHAY
N-Ch VISHAY
Part No.
Si4354DY
Si4886DY
RDS(on)
 (max)
18.50
13.5
MOSFET Specification
ID Current
Qg
Voltage
(A)
nC (Typ) nC (Max) (V)
9.0
7.0 10.5 30.0
11.0 14.5 20.0 30.0
Foot Print
SO-8
SO-8
Manufacturer
Website
www.vishay.com
www.vishay.com
Table 1. Input and Output Stage Components Selection Charts
Oct 31-06 Rev L
SP6136 Synchronous Buck Controller
14
© 2006 Sipex Corporation