Typical operating characteristics (continued) – Rainbow Electronics MAX17083 User Manual
Page 5
MAX17083
Low-Voltage, Internal Switch,
Step-Down Regulator
_______________________________________________________________________________________
5
EFFICIENCY vs. LOAD CURRENT
(V
IN
= 3.3V, 750kHz)
MAX17083 toc04
LOAD CURRENT (A)
EFFICIENCY (%)
0.01
0.1
1
60
70
80
90
100
50
0.001
10
V
OUT
= 0.75V
V
OUT
= 1.8V
V
OUT
= 1.5V
V
OUT
= 1.1V
SMPS OUTPUT VOLTAGE
vs. LOAD CURRENT (1MHz)
MAX17083 toc05
LOAD CURRENT (A)
OUTPUT VOLTAGE (V)
4
2
3
1
5
0.75
0.76
0.77
0.78
0.74
0
6
V
IN
= 5V
V
IN
= 3.3V
REGULATOR STARTUP WAVEFORM
(HEAVY LOAD)
MAX17083 toc06
400
μs/div
IL
OUT
POK
EN
LX
f
SW
= 750kHz, V
IN
= 5V,
V
OUT
= 1.1V
EN: 5V/div
OUT: 1V/div
R
LOAD
= 0.22
Ω
POK: 2V/div
I
L
: 5A/div
LX: 5V/div
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= 5V, V
OUT
= 1.1V, FREQ = open. T
A
= +25°C, unless otherwise noted.)
REGULATOR STARTUP WAVEFORM
(NO LOAD)
MAX17083 toc07
400
μs/div
IL
OUT
POK
EN
LX
f
SW
= 1MHz, V
IN
= 5V,
V
OUT
= 1.1V
EN: 5V/div
OUT: 1V/div
POK: 2V/div
I
L
: 5A/div
LX: 5V/div