ADP1871 datasheet(31/44 Pages) AD

Part #	ADP1871

Description	Synchronous Buck Controller with Constant On-Time and Valley Current Mode

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ADP1870/ADP1871

Rev. 0 | Page 31 of 44

EXTERNAL COMPONENT RECOMMENDATIONS

The configurations listed in Table 10 are with fCROSS = 1/12 × fSW, fZERO = ¼ × fCROSS, RRES = 100 kΩ, RBOT = 15 kΩ, RON = 5.4 mΩ

(BSC042N03MS G), VREG = 5 V (float), and a maximum load current of 14 A.

The ADP1871 models listed in Table 10 are the PSM versions of the device.

Table 10. External Component Values

Marking Code

SAP Model

ADP1870

ADP1871

VOUT

(V)

VIN

(V)

CIN

(μF)

COUT

(μF)

L1

(μH)

RC

(kΩ)

CCOMP

(pF)

CPAR

(pF)

RTOP

(kΩ)

ADP1870ARMZ-0.3-R7/

ADP1871ARMZ-0.3-R7

LDW

LDG

0.8

13

5 × 222

5 × 5603

0.72

47

740

74

5.0

LDW

LDG

1.2

13

5 × 222

4 × 5603

1.0

47

740

74

15.0

LDW

LDG

1.8

13

4 × 222

4 × 2704

1.0

47

571

57

30.0

LDW

LDG

2.5

13

4 × 222

3 × 2704

1.53

47

571

57

47.5

LDW

LDG

3.3

13

5 × 222

2 × 3305

2.0

47

571

57

67.5

LDW

LDG

5

13

4 × 222

3305

3.27

34

800

80

110.0

LDW

LDG

7

13

4 × 222

222 + ( 4 × 476)

3.44

34

800

80

160.0

LDW

LDG

1.2

16.5

4 × 222

4 × 5603

1.0

47

740

74

15.0

LDW

LDG

1.8

16.5

3 × 222

4 × 2704

1.0

47

592

59

30.0

LDW

LDG

2.5

16.5

3 × 222

4 × 2704

1.67

47

592

59

47.5

LDW

LDG

3.3

16.5

3 × 222

2 × 3305

2.00

47

592

59

67.5

LDW

LDG

5

16.5

3 × 222

2 × 1507

3.84

34

829

83

110.0

LDW

LDG

7

16.5

3 × 222

222 + 4 × 476

4.44

34

829

83

160.0

ADP1870ARMZ-0.6-R7/

ADP1871ARMZ-0.6-R7

LDX

LDM

0.8

5.5

5 × 222

4 × 5603

0.22

47

339

34

5.0

LDX

LDM

1.2

5.5

5 × 222

4 × 2704

0.47

47

326

33

15.0

LDX

LDM

1.8

5.5

5 × 222

3 × 2704

0.47

47

271

27

30.0

LDX

LDM

2.5

5.5

5 × 222

3 × 1808

0.47

47

271

27

47.5

LDX

LDM

1.2

13

3 × 222

5 × 2704

0.47

47

407

41

15.0

LDX

LDM

1.8

13

5 × 109

3 × 3305

0.47

47

307

31

30.0

LDX

LDM

2.5

13

5 × 109

3 × 2704

0.90

47

307

31

47.5

LDX

LDM

3.3

13

5 × 109

2 × 2704

1.00

47

307

31

67.5

LDX

LDM

5

13

5 × 109

1507

1.76

34

430

43

110.0

LDX

LDM

1.2

16.5

3 × 109

4 × 2704

0.47

47

362

36

15.0

LDX

LDM

1.8

16.5

4 × 109

2 × 3305

0.72

47

326

33

30.0

LDX

LDM

2.5

16.5

4 × 109

3 × 2704

0.90

47

326

33

47.5

LDX

LDM

3.3

16.5

4 × 109

3305

1.0

47

296

30

67.5

LDX

LDM

5

16.5

4 × 109

4 × 476

2.0

34

415

41

110.0

LDX

LDM

7

16.5

4 × 109

3 × 476

2.0

34

380

38

160.0

ADP1870ARMZ-1.0-R7/

ADP1871ARMZ-1.0-R7

LDY

LDN

0.8

5.5

5 × 222

4 × 2704

0.22

47

223

22

5.0

LDY

LDN

1.2

5.5

5 × 222

2 × 3305

0.22

47

223

22

15.0

LDY

LDN

1.8

5.5

3 × 222

3 × 1808

0.22

47

163

16

30.0

LDY

LDN

2.5

5.5

3 × 222

2704

0.22

47

163

16

47.5

LDY

LDN

1.2

13

3 × 109

3 × 3305

0.22

47

233

23

15.0

LDY

LDN

1.8

13

4 × 109

3 × 2704

0.47

47

210

21

30.0

LDY

LDN

2.5

13

4 × 109

2704

0.47

47

210

21

47.5

LDY

LDN

3.3

13

5 × 109

2704

0.72

47

210

21

67.5

LDY

LDN

5

13

4 × 109

3 × 476

1.0

34

268

27

110.0

LDY

LDN

1.2

16.5

3 × 109

4 × 2704

0.47

47

326

33

15.0

LDY

LDN

1.8

16.5

3 × 109

3 × 2704

0.47

47

261

26

30.0

LDY

LDN

2.5

16.5

4 × 109

3 × 1808

0.72

47

233

23

47.5

LDY

LDN

3.3

16.5

4 × 109

2704

0.72

47

217

22

67.5

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