Datasheet

MAX1735
200mA, Negative-Output, Low-Dropout
Linear Regulator in SOT23
4 _______________________________________________________________________________________
0.001
0.01
0.1
1
10
100
0 80 10040 6020 120 140 160 180 200
REGION OF STABLE ESR
vs. LOAD CURRENT
MAX1735 toc10
LOAD CURRENT (mA)
REGION OF STABLE ESR C
OUT
(Ω)
C
OUT
= 1
µ
F
REGION OF STABILITY
LINE-TRANSIENT RESPONSE
MAX1735 toc11
TIME (100
µ
s/div)
V
OUT
50mV/div
V
IN
1V/div
LOAD-TRANSIENT RESPONSE
(NORMAL OPERATION)
MAX1735 toc12
TIME (100µs/div)
I
LOAD STEP
0 to 50mA
V
OUT
10mV/div
LOAD-TRANSIENT RESPONSE
(NEAR DROPOUT)
MAX1735 toc13
TIME (100µs/div)
I
LOAD STEP
0 to 50mA
V
OUT
10mV/div
Typical Operating Characteristics (continued)
(Circuit of Figure 2, V
IN
= -4.0V, V
OUT
= -3.0V, T
A
= +25°C, unless otherwise specified.)
0
20
10
40
30
60
50
70
1
100
10
1k 10k
100k
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX1735 toc07
FREQUENCY (Hz)
PSRR (dB)
1M
C
OUT
= 10
µ
F
C
OUT
= 1.0
µ
F
10
0.01
10 1k 100k
OUTPUT NOISE DENSITY
vs. FREQUENCY
MAX1735 toc08
FREQUENCY (Hz)
OUTPUT NOISE (µV
RMS
/√Hz)
0.1
1
OUTPUT NOISE
(10Hz TO 1MHz)
MAX1735 toc09
TIME (1ms/div)
500
µ
V/div
C
OUT
= 1
µ
F
I
LOAD
= 50mA