Step-Down Controllers with Prebias Startup,

Lossless Sensing, Synchronization, and OVP

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13

Table 1. Suggested Components for Figure 1

DESIGNATION

QTY

DESCRIPTION

C1

1

1µF ±20%, 16V X5R ceramic capacitor (0603)

Panasonic ECJ1VB1C105M or equivalent

C2

1

10µF ±20%, 6.3V X5R ceramic capacitor (0805)

Panasonic ECJ2FB0J106M or Taiyo Yuden JMK212BJ106MG

C3

1

0.1µF ±10%, 50V X7R ceramic capacitor (0603)

TDK C1608X7R1H104KT or equivalent

C4A, C4B, C4C

2

10µF ±20%, 16V X5R ceramic capacitors (1206)

Panasonic ECJ3YB1C106M or equivalent

C5

1

0.22µF ±10%, 10V X7R ceramic capacitor (0603)

Taiyo Yuden LMK107BJ224KA or equivalent

C6A, C6B

2

180µF, 4V aluminum poly SPCAPs

Panasonic EEFUE0G181XR

C7

1

10pF, 50V C0G ceramic capacitor (0603)

C8

1

220pF ±10%, 50V X7R ceramic capacitor (0603)

C9, C10

2

0.47µF ±10% X7R ceramic capacitors (0603)

C11

1

100pF, 50V C0G ceramic capacitor (0603)

C12

1

470µF ±20%, 16V aluminum electrolytic capacitor

Rubycon 16MBZ470M

D1

1

100mA, 30V Schottky diode (SOT-323)

Central CMSSH-3

D2

1

250mA, 100V switching diode (SOT23)

Central CMPD914

L1

1

0.82µH, 33A, 1.6m

Ω inductor

Vishay IHLP-5050FD-01 0.82µH

N1, N2

2

N-channel MOSFETs

IRF IRF7821

N3, N4

2

N-channel MOSFETs

IRF IRF7832

R1

1

17.4k

Ω ±1% resistor (0603)

R2

1

8.06k

Ω ±1% resistor (0603)

R3

1

220k

Ω ±5% resistor (0603)

R4, R5

2

1.3k

Ω ±5% resistors (0603)

R6

1

42.2k

Ω ±1% resistor (0603)

R7

1

90.9k

Ω ±1% resistor (0603)

R8

1

9.31k

Ω ±1% resistor (0603)

R9

1

100k

Ω ±5% resistor (0603)