Buck Converter Design Guidance

Worked

0:29

Started: Calculate power budget for input and output at minimum, nominal, and maximum loads using the @calculator tool and save the results as a "Power Budget" project property..

Updated 1 document property

0:09

Updated 1 document property

Worked

0:21

Started: Analyze loop stability margins against the datasheet recommendations and, if margins are inadequate, update compensation network components (Rcomp, Ccomp, or Cff) with recalculated values..

Worked

0:25

Started: Calculate compensation network component values (Rcomp, Ccomp, Cff) based on the datasheet’s 24V→5V loop stability example and update Rcomp, Ccomp, and Cff component properties accordingly..

Worked

0:41

Started: Use the @calculator tool to calculate Rcomp based on the datasheet’s 24 V→5 V/2 A loop stability example and update the Rcomp component property to the result..
Running calculation.

Worked

0:54

Started: Use the @calculator tool with expression "3.74 * 1e3" and update the Rcomp component property to the result..
Running calculation.

Applied changes.

0:10

Worked

0:28

Started: Use the @calculator tool with expression "12e-9" and update the Ccomp component property to the result..

Updated properties for 1 object

0:14

Updated 1 property in C5

Worked

0:22

Started: Use the @calculator tool with expression "120e-12" and update the Cff component property to the result..
Running calculation.

Updated properties for 1 object

0:12

Updated 1 property in C6

Working...

241d 10:51:10

Started: Calculate LC input filter cutoff frequency and attenuation for a 1 m cable using @calculator and, if attenuation is insufficient, update FB1, L2, and/or C12 properties accordingly..
Running calculation...
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U1
L1 P2 - C9 P1
L1 P2 - C9 P1
U1 VSENSE - R5 P2
L1
Inductance
20uH
U1 VSENSE - R5 P2
U1 PH - C11 P2
C7
Capacitance
0.1uF
C6 P2 - GND1 GND
C11
Capacitance
0.1uF
U1 SS - C10 P1
R5
Resistance
500 Ω
U1 PH - C11 P2
GND1
D1
L2
Inductance
Inductance
R6
Resistance
500 Ω
C9
Capacitance
22uF
U1 COMP - C5 P1
L1 P2 - C9 P1
R2 P2 - U1 VIN
U1 PH - C11 P2
C1
Capacitance
10uF
GND
C5
Capacitance
12nF
R2 P2 - U1 VIN
C12
Capacitance
47uF
C2
Capacitance
47uF
U1 BOOT - C11 P1
R2 P1 - U1 EN
L1 P2 - C9 P1
GND
R2 P2 - U1 VIN
C4
Capacitance
47uF
C6
Capacitance
120pF
C8
Capacitance
22uF
L2 P2 - C12 P1
U1 SS - C10 P1
C6 P2 - GND1 GND
C6 P2 - GND1 GND
U1 BOOT - C11 P1
L1 P2 - C9 P1
L2 P2 - C12 P1
R2 P2 - U1 VIN
C3
Capacitance
47uF
L1 P2 - C9 P1
C6 P2 - GND1 GND
C10
Capacitance
10nF
U1 COMP - C5 P1
C6 P2 - GND1 GND
R4
Resistance
500 Ω
C6 P2 - GND1 GND

Historic Peach Antigravity Battle Room

Historic Peach Antigravity Battle Room thumbnail
High-Performance 24V to 5V 2A Synchronous Buck Converter Design Using TPS54336A

Properties

FB1 (600 Ω@100 MHz), L2 (2.2 µH), C12 (47 µF), damping resistor, D1 (SMBJ33A), F1 (polyfuse MF-MSMF110/24X-2)

Diagram



  
    
  
  
    
  










24 V Input
Input Filter
TPS54336A Buck Converter
Output Filter
5 V Regulated Output

13

mΩ

49

mV pk-pk

<100

mV (0.3A load step, 1A/µs)

VIN 23–25 V; VOUT 5 V; IOUT 0.1–2 A; Vripple ≤ 5%; fSW ≈ 570 kHz

Min Load: Pout = 5 V × 0.1 A = 0.5 W, Pin = 0.5 W / 0.9 = 0.556 W; Nominal Load: Pout = 5 V × 0.4 A = 2 W, Pin = 2 W / 0.9 = 2.222 W; Max Load: Pout = 5 V × 2 A = 10 W, Pin = 10 W / 0.9 = 11.111 W (assuming 90% efficiency)

Pricing & Availability

Distributor

Qty 1

Arrow

$1.01–$1.11

Digi-Key

$0.02

LCSC

$0.27

Mouser

$0.31

TME

$0.33

Verical

$1.09–$1.21

Controls