MAX15040 Maxim Integrated Products, MAX15040 Datasheet - Page 5

• Manufacturer Part Number: MAX15040
• Description: Step-Down Regulator
• Manufacturer: Maxim Integrated Products

(V
-0.10
-0.20
-0.30
-0.40
-0.50
0.10
100
90
80
70
60
50
40
IN
0
High-Efficiency, 4A, Step-Down Regulator with
0.1
= V
0
INTERNAL REFERENCE
V
V
DD
IN
Integrated Switches in 2mm x 2mm Package
V
DD
= 2.5V
OUT
= 3.3V
V
V
V
OUT
= 3.3V, output voltage = 1.8V, I
= 1.2V
OUT
vs. OUTPUT CURRENT
EN
1
LOAD REGULATION
OUTPUT CURRENT (A)
V
= 2.5V
LOAD CURRENT (A)
OUT
EFFICIENCY
V
V
OUT
= 1.5V
OUT
_______________________________________________________________________________________
= 1.8V
1
2
SHUTDOWN WAVEFORM
= 1.8V
V
OUT
= 1.5V
V
10µs/div
OUT
3
= 1.2V
10
4
I
OUT
MAX15040 toc09
= 1.8A
LOAD
V
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
I
OUT
OUT
2.4
Typical Operating Characteristics (continued)
= 4A, and T
2V/div
0
0
1V/div
T
A
LOAD-TRANSIENT RESPONSE
= -40°C
2.6
vs. INPUT VOLTAGE
T
INPUT VOLTAGE (V)
2.8
A
FREQUENCY
= +25°C
A
40µs/div
= +25°C, circuit of Figure 1, unless otherwise noted.)
3.0
T
A
= +85°C
3.2
MAX15040 toc07
3.4
V
3.6
V
OUT
EN
0
AC-COUPLED
100mV/div
1A/div
SOFT-START WAVEFORM
V
-0.1
-0.2
-0.3
-0.4
-0.5
0.5
0.4
0.3
0.2
0.1
OUT
V
I
LX
0
LX
2.4
400µs/div
2.6
SWITCHING WAVEFORMS
LINE REGULATION
INPUT VOLTAGE (V)
2.8
400ns/div
V
MAX15040 toc10
OUT
3.0
V
OUT
= 1.8V
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= 1.2V
3.2
2V/div
0
1V/div
0
MAX15040 toc08
3.4
3.6
0
AC-COUPLED
50mV/div
2A/div
0
2V/div
5