MAX15108 Datasheet, PDF (5/19 Pages) Maxim Integrated Products – High-Efficiency, 8A, Current-Mode Synchronous Step-Down Switching Regulator

High-Efficiency, 8A, Current-Mode
Synchronous Step-Down Switching Regulator
Typical Operating Characteristics (continued)
(Circuit of Typical Application Circuit, TA = +25NC, unless otherwise noted.)
OUTPUT VOLTAGE vs. OUTPUT CURRENT
(PWM MODE, VOUT = 1.5V)
1.53
1.52
VIN = 5V
1.51
1.50
VIN = 3.3V
1.49
1.48
1.47
012345678
OUTPUT CURRENT (A)
OUTPUT VOLTAGE ERROR %
vs. SUPPLY VOLTAGE
0.5
NORMALIZED AT V_IN = 3.3V
0.4
0.3
VOUT = 2.5V
VOUT = 1.2V
0.2
0.1
0
-0.1
V_OUT = 0.9V
-0.2
V_OUT = 1.5V
-0.3
-0.4
-0.5
2.7
VOUT = 1.8V
I_LOAD = 8A
3.1 3.5 3.9 4.3 4.7 5.1 5.5
SUPPLY VOLTAGE (V)
OUTPUT VOLTAGE vs. OUTPUT CURRENT
(SKIP MODE, VOUT = 1.5V)
1.53
1.52
VIN = 5V
1.51
1.50
V_IN = 3.3V
1.49
1.48
1.47
012345678
OUTPUT CURRENT (A)
LOAD-TRANSIENT RESPONSE
(VIN = 5V, VOUT = 1.5V)
MAX15108 toc07
40µs/div
VOUT
50mV/div
AC-COUPLED
8A
I_LOAD
2A/div
4A
SWITCHING WAVEFORMS
(IOUT = 8A, VIN = 5V)
SOFT-START WAVEFORMS (ILOAD = 8A)^{MAX15108 toc08}
MAX15108 toc11
VEN
2V/div
V_OUT
10mV/div
AC-COUPLED
V_LX
2V/div
ILX
5A/div
V_OUT
1V/div
I_LX
5A/div
V_LX
2V/div
VPGOOD
2V/div
400ns/div
1ms/div
SWITCHING WAVEFORM IN SKIP MODE
(IOUT = 10mA)
MAX15108 toc09
VOUT
10mV/div
AC-COUPLED
I_LX
2A/div
VLX
2V/div
20µs/div
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