Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX15038 User Manual
Page 5
MAX15038
4A, 2MHz Step-Down Regulator
with Integrated Switches
_______________________________________________________________________________________
5
EFFICIENCY
vs. OUTPUT CURRENT
MAX15038 toc01
OUTPUT CURRENT (A)
EFFICIENCY (%)
1.0
50
60
70
80
90
100
40
0.1
10.0
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
EFFICIENCY
vs. OUTPUT CURRENT
MAX15038 toc02
OUTPUT CURRENT (A)
EFFICIENCY (%)
1.0
50
60
70
80
90
100
40
0.1
10.0
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 3.3V
FREQUENCY
vs. INPUT VOLTAGE
MAX15038 toc03
INPUT VOLTAGE (V)
FREQUENCY (MHz)
5.0
4.5
3.0
3.5
4.0
1.85
1.90
1.95
2.00
2.05
2.10
2.15
2.20
1.80
2.5
5.5
T
A
= +85
°C
T
A
= +25
°C
T
A
= -40
°C
R
FREQ
= 23.2k
Ω
FREQUENCY
vs. INPUT VOLTAGE
MAX15038 toc04
INPUT VOLTAGE (V)
FREQUENCY (MHz)
5.0
4.5
3.0
3.5
4.0
0.85
0.90
0.95
1.00
1.05
1.10
1.15
1.20
0.80
2.5
5.5
T
A
= +85
°C
T
A
= +25
°C
T
A
= -40
°C
R
FREQ
= 49.9k
Ω
LOAD REGULATION
MAX15038 toc05a
LOAD CURRENT (A)
OUTPUT-VOLTAGE CHANGE (%)
3
2
1
-0.45
-0.40
-0.35
-0.30
-0.25
-0.20
-0.15
-0.10
-0.05
0
-0.50
0
4
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 2.5V
LINE REGULATION (LOAD = 4A)
MAX15038 toc05b
INPUT VOLTAGE (V)
OUTPUT-VOLTAGE CHANGE (%)
5.0
4.5
4.0
3.5
3.0
-0.10
-0.08
-0.06
-0.04
-0.02
0
-0.12
2.5
5.5
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 2.5V
Typical Operating Characteristics
(Typical values are V
IN
= V
EN
= 5V, V
OUT
= 1.8V, R
FREQ
= 49.9k
Ω, I
OUT
= 4A, T
A
= +25°C, circuit of Figure 1, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN
= 5V, C
VDD
= 2.2µF, T
A
= T
J
= -40°C to +85°C, typical values are at T
A
= +25°C, circuit of Figure 1, unless otherwise
noted.) (Note 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FB Hiccup Threshold
V
FB
falling
70
%
V
REFIN
Hiccup Threshold Blanking Time
V
FB
falling
28
µs
Note 3: Specifications are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.