ADP1031ACPZ-5-R7 datasheet(19/38 Pages) AD

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Data Sheet

ADP1031

Rev. A | Page 19 of 38

CH1 5.00mA

CH2 500mV

M2.00ms A CH1

4.30mA

5.92000ms

CH3 10.0V BW

VSW2

IOUT2

VOUT2

Figure 40. Buck Regulator Load Transient Response, VOUT1 = 24 V,

VOUT2 = 5.15 V, IOUT2 = 0.3 mA to 7 mA Step, TA = 25°C

–1.5

–1.0

–0.5

0.5

1.0

1.5

IOUT3 (mA)

–40°C

+25°C

+125°C

Figure 41. Inverting Regulator Load Regulation Across Temperature,

VOUT1 = +24 V, VOUT3 = −15 V, Nominal = VOUT3 at −7 mA IOUT3

CH1 10mV

CH2 20.0mA

M10.0µs A CH2

36.0mA

595.000µs

CH3 10.0V BW

VSW3

ISW3

VOUT3

Figure 42. Inverting Regulator Pulse Skipping Operation Showing Inductor

Current (IL3), Switch Node Voltage, and Output Ripple, TA = +25°C,

VOUT1 = +24 V, VOUT3 = −6 V, IOUT3 = −0.3 mA

CH1 5.00mA

CH2 500mV

M2.00ms A CH1

4.30mA

5.92000ms

CH3 10.0V BW

VSW2

IOUT2

VOUT2

Figure 43. Buck Regulator Load Transient Response, VOUT1 = 21 V,

VOUT2 = 5.15 V, IOUT2 = 0.3 mA to 7 mA Step, TA = 25°C

–40°C

+25°C

+125°C

–1.5

–1.0

–0.5

0.5

1.0

1.5

VOUT1 (V)

Figure 44. Inverting Regulator Line Regulation Across Temperature,

VOUT3 = −15 V, IOUT3 = −7 mA, Nominal = VOUT3 at +24 VOUT1

CH1 20mV

CH2 100mA

M2.00µs A CH2

36.0mA

595.000µs

CH3 10.0V BW

VSW3

ISW3

VOUT3

Figure 45. Inverting Regulator Discontinuous Conduction Operation

Showing IL3, Switch Node Voltage, and Output Ripple, TA = +25°C, VOUT1 =

+24 V, VOUT3 = −15 V, IOUT3 = −7 mA

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