MAX15038 Datasheet, PDF (5/18 Pages) Maxim Integrated Products – 4A, 2MHz Step-Down Regulator with Integrated Switches

4A, 2MHz Step-Down Regulator
with Integrated Switches
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
Hiccup Threshold Blanking Time V_FB falling
70
%
V_REFIN
28
µs
Note 3: Specifications are 100% production tested at T_A = +25°C. Limits over the operating temperature range are guaranteed by design.
Typical Operating Characteristics
(Typical values are V_IN = V_EN = 5V, V_OUT = 1.8V, R_FREQ = 49.9kΩ, I_OUT = 4A, T_A = +25°C, circuit of Figure 1, unless otherwise noted.)
EFFICIENCY
vs. OUTPUT CURRENT
100
90
80
VOUT = 2.5V
70
VOUT = 1.8V
60
VOUT = 1.2V
50
40
0.1
1.0
10.0
OUTPUT CURRENT (A)
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
2.5
FREQUENCY
vs. INPUT VOLTAGE
TA = +85°C
TA = +25°C
TA = -40°C
RFREQ = 49.9kΩ
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
EFFICIENCY
vs. OUTPUT CURRENT
100
90
80
VOUT = 2.5V
70
VOUT = 1.8V
60
VOUT = 1.2V
50
VIN = 3.3V
40
0.1
1.0
10.0
OUTPUT CURRENT (A)
LOAD REGULATION
0
-0.05
-0.10
-0.15
-0.20
-0.25 ^VOUT ^{= 1.2V}
-0.30
VOUT = 1.8V
-0.35
VOUT = 2.5V
-0.40
-0.45
-0.50
0
1
2
3
4
LOAD CURRENT (A)
2.20
2.15
2.10
2.05
2.00
1.95
1.90
1.85
1.80
2.5
FREQUENCY
vs. INPUT VOLTAGE
TA = +85°C
TA = +25°C
TA = -40°C
RFREQ = 23.2kΩ
3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
LINE REGULATION (LOAD = 4A)
0
VOUT = 2.5V
-0.02
VOUT = 1.8V
-0.04
-0.06
-0.08
-0.10
VOUT = 1.2V
-0.12
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
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