Datasheet

MAX8505
3A, 1MHz, 1% Accurate, Internal Switch
Step-Down Regulator with Power-OK
_______________________________________________________________________________________ 7
SHUTDOWN SUPPLY CURRENT
vs. INPUT VOLTAGE
MAX8505 toc08
INPUT VOLTAGE (V)
SHUTDOWN SUPPLY CURRENT (mA)
5.04.54.03.53.0
0.1
0.2
0.3
0.4
0
2.5 5.5
f
SW
= 1MHz
CURRENT LIMIT vs. OUTPUT VOLTAGE
MAX8505 toc09
OUTPUT VOLTAGE (V)
CURRENT LIMIT (A)
2.82.31.81.3
4.6
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
4.5
0.8 3.3
f
SW
= 1MHz
OUTPUT SHORT-CIRCUIT CURRENT
vs. INPUT VOLTAGE
MAX8505 toc10
INPUT VOLTAGE (V)
OUTPUT SHORT-CIRCUIT CURRENT (A)
5.04.54.03.53.0
3.5
4.5
5.5
2.5
2.5 5.5
f
SW
= 1MHz
GND-MEASURED TEMPERATURE
vs. OUTPUT CURRENT
MAX8505 toc11
OUTPUT CURRENT (A)
GND-MEASURED TEMPERATURE (°C)
3.753.503.25
20
40
60
80
100
120
0
3.00 4.00
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
V
IN
= 5V,
V
OUT
= 1.5V
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX8505 toc12
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
85603510-15
0.795
0.800
0.805
0.810
0.790
-40 110
f
SW
= 1MHz
TRANSIENT RESPONSE
(V
IN
= 5V, V
OUT
= 1.2V)
MAX8505 toc13
40µs/div
OUTPUT VOLTAGE
AC-COUPLED
100mV/div
2.25A
0.75A
0
OUTPUT
CURRENT
1A/div
Typical Operating Characteristics (continued)
(Typical values are at V
IN
= V
CC
= V
CTL
= 5V, V
OUT
= 1.2V, I
OUT
= 3A, and T
A
= +25°C, unless otherwise noted.)