_________________________________________________________________________________________________________

Copyright © 2015

Microsemi

Page 13 of 20

Rev.2.0, 17-Jan-2017

CPG

– PoE BU

One Enterprise Aliso Viejo, CA 92656 USA

PD70101 / PD70201

Datasheet

Typical Applications

+

-

+

-

RJ-45

CONNECTOR

VL

SYNC

Vout+

Vout-

Vout+

Vout-

VCC

ATFLAG

BR-1

BR-2

C1

100nF

/100V

C2

10F/63V

C3

2.2uF/100V

C4

10uF

25V

C5

22uF

25V

C6

10uF

25V

C7

NU

25V

C8

NU

25V

C11

1uF

10V

R2

0.08

U4

R17

10k

R18

10k

L1

10uH

(EMI)

Notes:

Freq set for 300kHz

Turn On VPP ~ 42V and Off ~ 38V

Q1

FDS3580

D1

1A/50V

L2B

47uH

R7

36k

C13

3.3nF

L2A

47uH

C12

15pF

R6

10k

R8

464k

R9

464k

R10

9.09k

R11

9.09k

D2

STPS5L60

C14

68nF

6.3V

R12 412k

R13

12.4k

R14

392k

R15

33.2k

R16

TO

EXTERNAL

ENABLE

R3

24.9k

R4

R5

TO

EXTERNAL

POWER

GOOD

MONITOR

VCC

C10

0.1uF

10V

C9

1uF

25V

R1

0

U1

PD70201

9

10

11

12

13

14

15

16

1

2

3

4

5

6

7

8

RDET

PGOOD

RREF

RCLASS

VPN_IN

N/C

AT_FLAG

VPN_OUT

GND

FB

DAO

COMP

VSP

VSN

24

23

22

21

20

19

18

17

VL

32

31

30

29

28

27

26

25

SG

58V

TVS

Figure 4 · 12V2.1A Output Non-Isolated Direct Buck Application