Low-Cost, Dual-Output, Step-Down

Controller with Fast Transient Response

14

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Table 3. Component List for Figure 3

DESIGNATION

QTY

DESCRIPTION

C1, C15

2

0.01µF, 10V X7R ceramic

capacitors

C2, C3, C16, C17

4

10µF, 16V X5R ceramic capacitors

C4

1

1000µF/16V aluminum electrolytic

capacitor

Rubycon 16MBZ1000M

C5

1

1µF, 16V X5R ceramic capacitor

C6

1

1µF, 10V X5R ceramic capacitor

C7, C18

2

0.22µF, 10V X7R ceramic

capacitors

C8

1

0.015µF, 10V X7R ceramic

capacitor

C9, C10

2

470µF, 2.5V POS capacitors

Sanyo 2R5TPD470M6

C11, C22

2

10µF, 6.3V X5R ceramic capacitors

C12

1

1000pF, 10V X7R ceramic

capacitor

C13

1

4.7µF, 10V X5R ceramic capacitor

C14, C23

2

2200pF, 25V X7R capacitors

C19

1

4700pF, 10V X7R capacitor

C20, C21

2

680µF, 2.5V POS capacitors

Sanyo 2R5TPD680M6

L1

1

0.56µH, 4.6m

Ω inductor

Panasonic ETQP4LR56WFL

DESIGNATION

QTY

DESCRIPTION

L2

1

0.47µH, 1.2m

Ω inductor

TOKO FDV0603-R47M

N1, N2

2

n-channel MOSFETs

IRLR7821 (D-Pak)

N3, N4

2

n-channel MOSFETs

IRLR3907Z (D-Pak)

N5

1

n-channel MOSFET

IRF7807Z (8-pin SO)

N6

1

n-channel MOSFET

IRF7821 (8-pin SO)

N7

1

n-channel MOSFET

2N7002 (SOT23)

R1

1

3.16k

Ω ±1% resistor (0402 or 0603)

R2

1

24.3k

Ω ±1% resistor (0402 or 0603)

R3, R13

2

10k

Ω ±1% resistors (0402 or 0603)

R4

1

3.57k

Ω ±5% resistor (0402 or 0603)

R5

1

3.0

Ω ±5% resistor (0603)

R6, R7

2

1k

Ω ±1% resistors (0402 or 0603)

R8

1

2.74k

Ω ±1% resistor (0402 or 0603)

R9

1

10k

Ω ±5% resistor (0402 or 0603)

R10

1

44.2k

Ω ±1% resistor (0402 or 0603)

R11

1

14.7k

Ω ±1% resistor (0402 or 0603)

R12

1

2.0

Ω ±5% resistor (0402 or 0603)