ADP1972ARUZ-R7 datasheet(8/18 Pages) AD

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ADP1972

Data Sheet

97.8

97.2

97.3

97.4

97.5

97.6

97.7

INPUT VOLTAGE (V)

TA = –40°C

TA = +25°C

TA = +125°C

Figure 9. Maximum Internal Duty Cycle vs. Input Voltage,

RFREQ = 100 kΩ, VCOMP = 5 V, and No Load on DL, DH, or DMAX

450

100

150

200

250

300

400

350

100

DUTY CYCLE (%)

TA = –40°C

TA = +25°C

TA = +125°C

Figure 10. RDMAX vs. Duty Cycle, RFREQ = 100 kΩ, VCOMP = 5 V, and

No Load on DL or DH

100

0.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

VCOMP (V)

TA = –40°C

TA = +25°C

TA = +125°C

Figure 11. Duty Cycle vs. VCOMP, RFREQ = 100 kΩ, and

No Load on DL, DH, or DMAX

210

110

130

150

170

190

100

150

200

250

300

fSET (kHz)

Figure 12. RFREQ(MASTER) vs. Switching Frequency (fSET)

5.020

4.990

4.995

5.000

5.005

5.010

5.015

INPUT VOLTAGE (V)

TA = –40°C

TA = +25°C

TA = +85°C

TA = +125°C

Figure 13. VREG vs. Input Voltage, No Load

5.020

4.980

4.985

4.990

4.995

5.000

5.005

5.010

5.015

LOAD CURRENT (mA)

TA = –40°C

TA = +25°C

TA = +85°C

TA = +125°C

Figure 14. VREG vs. Load Current

Rev. B | Page 8 of 18

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