ADP1031ACPZ-2-R7 datasheet(18/38 Pages) AD

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ADP1031

Data Sheet

Rev. A | Page 18 of 38

–1.5

–1.0

–0.5

0.5

1.0

1.5

IOUT2 (mA)

–40°C

+25°C

+125°C

Figure 34. Buck Regulator Load Regulation Across Temperature, VOUT1 = 24 V,

VOUT2 = 5.15 V, Nominal = VOUT2 at 10 mA IOUT2

CH1 10.0mV Ω

CH2 20.0mA

M10.0µs A CH3

20.4V

700.000ns

CH3 10.0V BW

VOUT2

ISW2

VSW2

Figure 35. Buck Regulator Pulse Skipping Operation Showing Inductor

Current 2 (IL2), Switch Node Voltage, and Output Ripple, TA = 25°C, VOUT1 =

24 V, VOUT2 = 5.15 V, IOUT2 = 0.3 mA

CH1 20.0mV Ω

CH2 50.0mA

M2.00µs A CH3

16.0V

40.0000ns

CH3 10.0V BW

VOUT2

ISW2

VSW2

Figure 36. Buck Regulator Discontinuous Conduction Mode Operation

Showing IL2, Switch Node Voltage, and Output Ripple, TA = 25°C, VOUT1 = 21 V,

VOUT2 = 5.15 V, IOUT2 = 7 mA

–1.5

–1.0

–0.5

0.5

1.0

1.5

VOUT1 (V)

–40°C

+25°C

+125°C

Figure 37. Buck Regulator Line Regulation Across Temperature,

VOUT2 = 5.15 V, IOUT2 = 7 mA, Nominal = VOUT2 at 24 VOUT1

CH1 50.0mV Ω

CH2 100mA

M2.00µs A CH3

3.80V

–40.000ns

CH3 10.0V BW

VOUT2

ISW2

VSW2

Figure 38. Buck Regulator Discontinuous Conduction Mode Operation

Showing IL2, Switch Node Voltage, and Output Ripple, TA = 25°C, VOUT1 = 21 V,

VOUT2 = 5.15 V, IOUT2 = 50 mA

CH1 1.00V Ω

CH2 200mA

M200µs A CH2

164mA

595.000µs

CH3 10.0V BW

VOUT2

VSW2

ISW2

Figure 39. Buck Regulator Short-Circuit Current Limit During Startup,

VOUT1 = 24 V, VOUT2 = SGND2, TA = 25°C

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