Datasheet
TPS40077
www.ti.com
..................................................................................................................................................... SLUS714D – JANUARY 2007 – REVISED APRIL 2009
5. The required gain of 16.9 dB and Equation 51 sets the value for R
PZ2
. R
PZ2
= 21.5 k Ω .
6. C
Z2
is calculated using Equation 55 and the desired frequency for the second zero, C
Z2
= 1.7 nF, or using
standard values, 1.8 nF.
7. Finally, C
P2
is calculated using the second pole frequency and Equation 53 ; C
P2
= 47 pF.
Using these values, the simulated results are 57 ° of phase margin at 54 kHz.
Table 4. Bill of Materials
RefDes Count Value Description Size Part Number Mfr
C1 1 470 µ F Capacitor, aluminum, 470- µ F, 25-V, 20% 0.457 x 0.406 EEVFK1E471P Panasonic
C2, C10 2 0.1 µ F Capacitor, ceramic, 25-V, X7R, 20% 0603 Std Vishay
C3 1 15 nF Capacitor, ceramic, 25-V, X7R 20% 0603 Std Vishay
C4 1 47 pF Capacitor, ceramic, 25-V, X7R, 20% 0603 Std Vishay
C5 1 1.8 nF Capacitor, ceramic, 25-V, X7R 20% 0603 Std Vishay
C6 1 680 pF Capacitor, ceramic, 25-V, X7R 20% 0603 Std Vishay
C7 1 51 pF Capacitor, ceramic, 25-V, COG 20% 0603 Std Vishay
C8, C11 2 0.1 µ F Capacitor, ceramic, 25-V, X7R, 20% 0603 Std Vishay
C9 1 1 µ F Capacitor, ceramic, 25-V, X7R, 20% 0805 Std Vishay
C12, C14, 3 22 µ F Capacitor, ceramic, 22- µ F, 16-V, X5R, 20% 1812 C4532X5R1C226MT TDK
C15
C13 1 2.2 nF Capacitor, ceramic, 25-V, X7R, 20% 0603 Std Vishay
C16 1 470 µ F Capacitor, aluminum, SM, 6.3-V, 300-m Ω 8 mm × 10 Std Panasonic
(FC series) mm
C17 1 47 µ F Capacitor, ceramic, 47-uF, 6.3-V, X5R, 20% 1812 C4532X5R0J476MT TDK
D1 1 BAT54 Diode, Schottky, 200-mA, 30-V SOT23 BAT54 Vishay
J1, J2 2 ED1609-ND Terminal block, 2-pin, 15-A, 5,1-mm 0.40 × 0.35 ED1609 OST
J3 1 PTC36SAAN Header, 2-pin, 100-mil spacing, (36-pin 0.100 × 2 PTC36SAAN Sullins
strip)
L1 1 2.5 µ H Inductor, SMT, 2.5 µ H, 16.5-A, 3.4- m Ω 0.515 × 0.516 MLC1550-252ML Coilcraft
Q1 1 Si7860DP MOSFET, N-channel, 30-V, 18-A, 8.0-m Ω PWRPAK Si7860DP Vishay
S0-8
Q2 1 Si7336ADP MOSFET, N-channel, 30-V, 18-A, 40-m Ω PWRPAK Si7886ADP Vishay
S0-8
Q3 1 FDV301N MOSFET, N-channel, 25-V, 220-mA, 5- Ω SOT23 FDV301N Fairchild
R1 1 10 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R2, R6 2 165 k Ω Resistor, Chip, 1/16-W, 20% 0603 Std Std
R3 1 32.4 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R4, R11 2 0 Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R5 1 21.5 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R7 1 51 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R8 1 3.3 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R9 1 1.8 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R10 1 330 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R12 1 51 Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
R13 1 1 k Ω Resistor, chip, 1/16-W, 20% 0603 Std Std
U1 1 TPS40077PWP IC, Texas Instruments PWP16 TPS40077PWP TI
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