ADP1878ACPZ-0.6-R7(RevA) View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADP1878ACPZ-0.6-R7
(Rev.:RevA)

Synchronous Buck Controller with Constant On Time and Valley Current Mode

Analog Devices 

ADP1878/ADP1879

LOW SIDE

TA = 25°C

4

HIGH SIDE

SW NODE

23

M

HS MINUS

SW

CH2 5V

CH3 5V

CH4 2V

MATH 2V 40ns

M40ns

T 29.0%

A CH2 4.20V

Figure 58. Output Drivers and SW Node Waveforms

LOW SIDE

16ns (tf,DRVL)

TA = 25°C

4

22ns (tpdhDRVH)

HIGH SIDE

SW NODE

25ns (tr,DRVH)

23

M

HS MINUS

SW

CH2 5V

CH3 5V

CH4 2V

MATH 2V 40ns

M40ns

T 29.0%

A CH2 4.20V

Figure 59. High-Side Driver Rising and Low-Side Falling Edge Waveforms (CIN =

4.3 nF (High-/Low-Side MOSFET), QTOTAL = 27 nC (VGS = 4.4 V (Q1), VGS = 5 V (Q3))

18ns (tr,DRVL)

LOW SIDE

4

HIGH SIDE

24ns (tpdh,DRVL)

HS MINUS

SW

23

11ns (tf,DRVH)

SW NODE

M

TA = 25°C

CH2 5V

CH3 5V

CH4 2V

MATH 2V 20ns

M20ns

T 39.2%

A CH2 4.20V

Figure 60. High-Side Driver Falling and Low-Side Rising Edge Waveforms (CIN =

4.3 nF (High-/Low-Side MOSFET), QTOTAL = 27 nC (VGS = 4.4 V (Q1), VGS = 5 V (Q3))

Data Sheet

570

VREG = 5.5V

VREG = 3.6V

VREG = 2.7V

550

530

510

490

470

450

430

–40 –20

0

20

40

60

80 100 120

TEMPERATURE (°C)

Figure 61. Transconductance vs. Temperature

680

+125°C

+25°C

630

–40°C

580

530

480

430

380

330

2.7 3.0 3.3 3.6 3.9 4.2 4.5 4.8 5.1 5.4

VREG (V)

Figure 62. Transconductance vs. VREG

1.30

1.25

1.20

1.15

+125°C

1.10

1.05

+25°C

1.00

0.95

–40°C

0.90

0.85

0.80

0.75

0.70

2.7

3.1

3.5

3.9

4.3

4.7

5.1

5.5

VREG (V)

Figure 63. Quiescent Current vs. VREG

Rev. A | Page 16 of 40

Share Link: