ADP5042 Analog Devices, ADP5042 Datasheet - Page 16

• Manufacturer Part Number: ADP5042
• Description: Micro PMU with 0.8 A Buck, Two 300 mA LDOs, Supervisory, Watchdog and Manual Reset
• Manufacturer: Analog Devices

ADP5042
Figure 45. LDO1 Output Noise vs. Load Current, Across Input and Output Voltage
Figure 46. LDO2 Output Noise vs. Load Current, Across Input and Output Voltage
Figure 47. LDO1 Noise Spectrum Across Output Voltage, VIN = VOUT + 0.3 V
0.01
100
100
100
1.0
0.1
10
10
0.0001
0.0001
10
10
0.001
0.001
100
0.01
0.01
1k
VOUT2 = 3.3V, VIN2 = 3.6V, I
VOUT2 = 1.5V, VIN2 = 1.8V, I
VOUT2 = 2.8V, VIN2 = 3.1V, I
FREQUENCY (Hz)
0.1
0.1
LOAD (mA)
LOAD (mA)
10k
CH3; VOUT = 3.3V; VIN = 5V
CH3; VOUT = 3.3V; VIN = 3.6V
CH3; VOUT = 2.8V; VIN = 3.1V
CH3; VOUT = 1.5V; VIN = 5V
CH3; VOUT = 1.5V; VIN = 1.8V
CH2; V
CH2; V
CH2; V
CH2; V
CH2; V
1
1
OUT
OUT
OUT
OUT
OUT
100k
10
10
= 3.3V; VIN = 5V
= 3.3V; VIN = 3.6V
= 2.8V; VIN = 3.1V
= 1.5V; VIN = 5V
= 1.5V; VIN = 1.8V
LOAD
LOAD
LOAD
1M
100
100
= 300mA
= 300mA
= 300mA
10M
Rev. A | Page 16 of 32
1k
1k
Figure 48. LDO2 Noise Spectrum Across Output Voltage, VIN = VOUT + 0.3 V
Figure 50. LDO2 PSRR Across Output Load, VIN3 = 3.3 V, VOUT3 = 2.8 V
0.01
–100
100
0.01
0.1
100
–10
–20
–30
–40
–50
–60
–70
–80
–90
10
1.0
0.1
10
1
1
10
10
1mA
10mA
100mA
200mA
300mA
VOUT3 = 1.5V, VIN3 = 1.8V, I
VOUT2 = 2.8V, VIN2 = 3.1V, I
VOUT3 = 2.8V, VIN3 = 3.1V, I
Figure 49. LDO1 vs. LDO2 Noise spectrum
10
100
100
100
VOUT3 = 3.3V, VIN3 = 3.6V, I
VOUT3 = 1.5V, VIN3 = 1.8V, I
VOUT3 = 2.8V, VIN3 = 3.1V, I
1k
1k
VOUT3 = 3.3V, VIN3 = 3.6V, I
VOUT2 = 1.5V, VIN2 = 1.8V, I
VOUT2 = 3.3V, VIN2 = 3.6V, I
FREQUENCY (Hz)
FREQUENCY (Hz)
FREQUENCY (Hz)
1k
10k
10k
LOAD
LOAD
LOAD
= 300mA
= 300mA
= 300mA
10k
100k
100k
Data Sheet
LOAD
LOAD
LOAD
LOAD
LOAD
LOAD
100k
1M
1M
= 300mA
= 300mA
= 300mA
= 300mA
= 300mA
= 300mA
1M
10M
10M