Datasheet

MAX8505
3A, 1MHz, 1% Accurate, Internal Switch
Step-Down Regulator with Power-OK
8 _______________________________________________________________________________________
TRANSIENT RESPONSE
(V
IN
= 3.3V, V
OUT
= 1.2V)
MAX8505 toc14
40µs/div
OUTPUT VOLTAGE
AC-COUPLED
100mV/div
2.25A
0.75A
0
OUTPUT
CURRENT
1A/div
SWITCHING WAVEFORM
(V
IN
= 5V, V
OUT
= 1.2V, I
OUT
= 2.5A)
MAX8505 toc15
200ns/div
INDUCTOR CURRENT
AC-COUPLED
2A/div
V
OUT
AC-COUPLED
20mV/div
V
LX
2V/div
SOFT-START/SHUTDOWN WAVEFORM
(V
IN
= 3.3V, V
OUT
= 1.2V, I
OUT
= 3A, C
REF
= 0.068µF)
MAX8505 toc16
400µs/div
V
OUT
500mV/div
V
CTRL
5V/div
V
POK
5V/div
INPUT CURRENT
1A/div
TRANSIENT RESPONSE DURING SOFT-START
MAX8505 toc17
100µs/div
V
OUT
100mV/div
I
OUT
2A/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.)