MAX15038 Datasheet, PDF (6/18 Pages) Maxim Integrated Products – 4A, 2MHz Step-Down Regulator with Integrated Switches

4A, 2MHz Step-Down Regulator
with Integrated Switches
Typical Operating Characteristics (continued)
(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.)
LOAD TRANSIENT
MAX15038 toc06
VOUT
AC-COUPLED
VOUT
100mV/div
40µs/div
ILX
2A
IOUT
VLX
0A
SWITCHING WAVEFORMS
(FORCED PWM, 2A LOAD)
MAX15038 toc07
VOUT
AC-COUPLED
50mV/div
400ns/div
2A/div
ILX
0A
5V/div
VLX
SWITCHING WAVEFORMS
(SKIP MODE, NO LOAD)
MAX15038 toc08
AC-COUPLED
100mV/div
1A/div
0A
2µs/div
5V/div
0V
SOFT-START WAVEFORM
(RLOAD = 0.5Ω)
MAX15038 toc09
VEN
5V/div
SHUTDOWN WAVEFORM
(RLOAD = 0.5Ω)
MAX15038 toc10
VEN
5V/div
VOUT
1V/div
0V
VOUT
1V/div
0V
400µs/div
10µs/div
INPUT SHUTDOWN CURRENT
vs. INPUT VOLTAGE
12
11
10
9
8
7
6
VEN = 0V
5
2.5 3.0 3.5 4.0 4.5 5.0 5.5
INPUT VOLTAGE (V)
MAXIMUM OUTPUT CURRENT
vs. OUTPUT VOLTAGE
10
9
8
7
6
5
4
3
2
0.5
1.0
1.5
2.0
2.5
OUTPUT VOLTAGE (V)
6 _______________________________________________________________________________________