Datasheet

MAX1954A
Low-Cost, Current-Mode PWM Buck
Controller with Foldback Current Limit
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Table 1. Suggested Components
PART DESIGNATOR
MAX1954A
(FIGURE 1)
20A CIRCUIT
(FIGURE 2)
C1
0.22µF, 10V X7R ceramic capacitor
Kemet C0603C224M8RAC
0.22µF, 10V X7R ceramic capacitor
Kemet C0603C224M8RAC
C2
1µF, 6.3V X5R ceramic capacitor
Taiyo Yuden JMK212BJ106MG
10µF, 16V X5R ceramic capacitor
Taiyo Yuden EMK325BJ106MN
C3
10µF, 16V X5R ceramic capacitor
Taiyo Yuden EMK325BJ106MN
10µF, 16V X5R ceramic capacitor
Taiyo Yuden EMK325BJ106MN
C4 0.1µF, 6.3V X7R ceramic capacitor
10µF, 16V X5R ceramic capacitor
Taiyo Yuden EMK325BJ106MN
C5
180µF, 4V SP polymer capacitor
Panasonic EEFUEOG181R
10µF, 16V X5R ceramic capacitor
Taiyo Yuden EMK325BJ106MN
C6
1500pF, 50V X7R ceramic capacitor
TDK C1608X7R1H152K
10µF, 16V X5R ceramic capacitor
Taiyo Yuden EMK325BJ106MN
C7 —
0.1µF, 50V X7R ceramic capacitor
Taiyo Yuden UMK107BJ104KA
C8 —
270µF, 2V SP polymer capacitor
Panasonic EEFUEOD271R
C9–C13 —
270µF, 2V SP polymer capacitors
Panasonic EEFUEOD271R
Cc
680pF, 10V X7R ceramic capacitor
Kemet C0402C681M8RAC
560pF, 10V X7R ceramic capacitor
Kemet C0402C561M8RAC
C
F
—
15pF, 10V C0G ceramic capacitor
Kemet C0402C150K8GAC
R1 16.9kΩ ±1% resistor 10kΩ ±1% resistor
R2 8.06kΩ ±1% resistor 8.06kΩ ±1% resistor
R3 2Ω ±5% resistor —
R
C
62kΩ ±5% resistor 270kΩ ±5% resistor
D1
Schottky diode
Central Semiconductor CMPSH1-4
Schottky diode
Central Semiconductor CMPSH1-4
N1, N2
20V, 5A dual MOSFETs
Fairchild FDS6898A
30V N-channel MOSFETs
International Rectifier IRF7811
N3, N4 —
30V N-channel MOSFETs
Siliconix Si4842DY
L1
1µH, 3.6A inductor
TOKO 817FY-1R0M
0.8µH, 27.5A inductor
Sumida CEP125U-0R8