Datasheet

MAX1951A
1MHz, 2A, 2.6V to 5.5V Input, PWM DC-DC
Step-Down Regulator with Enable
_______________________________________________________________________________________ 5
STARTUP INTO PREBIASED
OUTPUT
MAX1951A toc11
LX
5V/div
V
OUT
2V/div
V
OUT
= 2.5V
V
OUT
= 3.3V
EN
5V/div
1ms/div
SHUTDOWN WAVEFORMS
(V
IN
= 3.3V, V
OUT
= 2.5V, R
L
= 1.5I)
MAX1951A toc12
LX
2V/div
V
OUT
2V/div
EN
2V/div
20Fs/div
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX1951A toc13
INPUT VOLTAGE (V)
SUPPLY CURRENT (mA)
5.04.53.0 3.5 4.0
1
2
3
4
5
6
7
8
0
2.55.5
Typical Operating Characteristics (continued)
(Typical values are at V
IN
= V
CC
= 5V, V
OUT
= 1.5V, I
OUT
= 1.5A, and T
A
= +25°C, unless otherwise noted. See Figure 2.)
FEEDBACK VOLTAGE
vs. TEMPERATURE
MAX1951A toc14
TEMPERATURE (NC)
FEEDBACK VOLTAGE (mV)
603510-15
797
799
801
803
805
795
-40 85
CASE TEMPERATURE
vs. AMBIENT TEMPERATURE
MAX1951A toc15
AMBIENT TEMPERATURE (NC)
CASE TEMPERATURE (NC)
603510-15
-20
0
20
40
60
80
100
120
140
160
180
-40
-40 85