Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX15040 User Manual
Page 4
EFFICIENCY
vs. OUTPUT CURRENT
MAX15040 toc01
OUTPUT CURRENT (A)
EFFICIENCY (%)
1
50
60
70
80
90
100
40
0.1
10
V
DD
= V
IN
= 3.3V
V
OUT
= 1.2V
V
OUT
= 1.8V
V
OUT
= 1.5V
V
OUT
= 2.5V
EFFICIENCY
vs. OUTPUT CURRENT
MAX15040 toc02
OUTPUT CURRENT (A)
EFFICIENCY (%)
1
50
60
70
80
90
100
40
0.1
10
V
IN
= V
DD
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
OUT
= 1.5V
MAX15040
High-Efficiency, 4A, Step-Down Regulator with
Integrated Switches in 2mm x 2mm Package
4
_______________________________________________________________________________________
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
THERMAL SHUTDOWN
Thermal-Shutdown Threshold
Rising
+165
°C
Thermal-Shutdown Hysteresis
20
°C
POWER-GOOD (PWRGD)
V
FB
falling, V
REFIN/SS
= 0.6V
87
90
93
Power-Good Threshold Voltage
V
FB
rising, V
REFIN/SS
= 0.6V
92.5
% of
V
RE F IN /S S
Power-Good Edge Deglitch
V
FB
falling or rising
48
Clock
cycles
PWRGD Output-Voltage Low
I
PWRGD
= 4mA (sinking)
0.03
0.15
V
PWRGD Leakage Current
V
DD
= V
PWRGD
= 3.6V, V
FB
= 0.9V
0.01
µA
OVERCURRENT LIMIT (HICCUP MODE)
Current-Limit Startup Blanking
112
Clock
cycles
Restart Time
896
Clock
cycles
FB Hiccup Threshold
V
FB
falling
70
% of
V
RE F IN /S S
Hiccup Threshold Blanking Time
V
FB
falling
36
µs
Note 3: Specifications are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by
design and characterization.
Note 4: Guaranteed by design.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
DD
= 3.3V, T
A
= -40°C to +85°C. Typical values are at T
A
= +25°C, circuit of Figure 1, unless otherwise noted.) (Note 3)
Typical Operating Characteristics
(V
IN
= V
DD
= 3.3V, output voltage = 1.8V, I
LOAD
= 4A, and T
A
= +25°C, circuit of Figure 1, unless otherwise noted.)