ADP7185ACPZN1.2-R7 datasheet(12/19 Pages) AD

12 / 19 page

ADP7185

Data Sheet

Rev. 0 | Page 12 of 19

LOAD CURRENT (mA)

–1000

–100

–10

3.80

3.85

3.90

3.95

4.00

4.05

4.10

4.15

4.20

4.25

4.30

4.35

4.40

10Hz TO 100kHz

100Hz TO 100kHz

Figure 34. RMS Noise vs. Load Current (ILOAD) at Various Frequencies,

VIN = −3.8 V, VOUT = −3.3 V

FREQUENCY (Hz)

100

10k

100k

10M

–4.5V ADJ

–4.5V

–3.3V

–2.5V

–1.2V

0.1

100

10k

Figure 35. Noise Spectral Density (NSD) vs. Frequency at Various Output Voltages,

VIN = −3.8 V, VOUT = −3.3 V

CH1 995mV

500mV/DIV

CH2 –2.00mV

2.0mV

5.0µs/DIV

1MS 20GS/s

STOP 40mV

EDGE POSITIVE

VIN

VOUT

Figure 36. Line Transient Response, 500 mV Step, VOUT = −1.2 V, ILOAD = −500 mA

CH1 995mV

500mV/DIV

CH2 –20.5mV

2.0mV

5.0µs/DIV

1MS 20GS/s

STOP 40mV

EDGE POSITIVE

VIN

VOUT

Figure 37. Line Transient Response, 500 mV Step, VOUT = −3.3 V, ILOAD = −500 mA

CH1 –475mA

500mA/DIV

CH2 5.0mV

9.9mV

10.0µs/DIV

2MS 20GS/s

STOP –220mA

EDGE POSITIVE

ILOAD

VOUT

Figure 38. Load Transient Response, VOUT = −1.2 V, ILOAD = −10 mA to −500 mA

CH1 –215.0mA

200mA/DIV

CH2 3.6mV

2.0mV

10.0µs/DIV

2MS 20GS/s

STOP –222mA

EDGE POSITIVE

ILOAD

VOUT

Figure 39. Load Transient Response, VOUT = −2.5 V, ILOAD = −10 mA to −500 mA

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