Datasheet

MAX8530/MAX8531
Dual Low-Dropout Linear Regulators
with RESET or Low-Noise Output in UCSP or QFN
4 _______________________________________________________________________________________
Typical Operating Characteristics (continued)
V
OUT1
= 3.3V, V
OUT2
= 1.5V, load = 80mA (both output voltages), V
IN
= 3.8V, C
OUT_
= 2.2µF, C
BP
= 0.01µF, C
IN
= 2.2µF, and T
A
= +25°C,
unless otherwise noted.
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX8530 toc04
LOAD CURRENT (mA)
DROPOUT VOLTAGE (mV)
18016014012010080604020
50
100
150
200
250
0
0 200
LDO DROPOUT VOLTAGE vs. V
OUT
MAX8530 toc05
V
OUT
(V)
DROPOUT VOLTAGE (mV)
3.23.13.02.92.82.72.6
20
40
60
80
100
120
0
2.5 3.3
I
OUT1
= 80mA
OUTPUT VOLTAGE ACCURACY
vs. TEMPERATURE
MAX8530 toc06
TEMPERATURE (°C)
OUTPUT VOLTAGE (%)
603510-15
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1.0
-1.0
-40 85
PSRR vs. FREQUENCY
MAX8530 toc07
FREQUENCY (kHz)
PSRR (dB)
1001010.1
10
20
30
40
50
60
70
0
0.01 1000
OUT2 = 2.85V
OUT1 = 2.85V
100Ω LOAD
CHANNEL-TO-CHANNEL ISOLATION
vs. FREQUENCY (MAX8531)
MAX8530 toc08
FREQUENCY (kHz)
CHANNEL-TO-CHANNEL ISOLATION (dB)
100100.1 1
10
20
30
40
50
60
70
80
0
0.01 1000
100
Ω LOAD
OUTPUT NOISE SPECTRAL DENSITY
vs. FREQUENCY (MAX8531)
MAX8530 toc09
FREQUENCY (kHz)
NOISE DENSITY (nV
RMS
/√Hz)
1010.1
100
1000
10,000
10
0.01 100
OUTPUT NOISE (10Hz TO 100kHz)
(MAX8531)
MAX8530 toc10
V
OUT_
500μV/
div
10ms/div
LINE TRANSIENT
MAX8530 toc11
V
OUT_
4.5V
40μs/div
V
IN
3.5V
1V/div
20mV/div
AC-COUPLED