MAX15038 Datasheet, PDF (8/18 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.)
STARTING INTO PREBIASED OUTPUT
(MODE = VDD, VOUT = 2.5V, NO LOAD)
MAX15038 toc20
VEN
2V/div
0V
VOUT
1V/div
0V
VPWRGD
2V/div
0V
200µs/div
STARTING INTO PREBIASED OUTPUT
ABOVE NOMINAL SETPOINT (VOUT = 1.5V)
MAX15038 toc22
VEN
2V/div
0V
VOUT
1V/div
VMODE = VDD,
NO LOAD
0V
VPWRGD
2V/div
0V
1ms/div
TRANSITION FROM SKIP MODE
TO FORCED PWM MODE
MAX15038 toc24
VMODE
5V/div
VLX
5V/div
VOUT
0.5V/div
STARTING INTO PREBIASED OUTPUT
(MODE = VDD/2, VOUT = 2.5V, NO LOAD)
MAX15038 toc21
VEN
2V/div
0V
VOUT
1V/div
0V
VPWRGD
2V/div
0V
200µs/div
STARTING INTO PREBIASED ABOVE
NOMINAL SETPOINT (VOUT = 1.5V)
MAX15038 toc23
VEN
2V/div
0V
VOUT
1V/div
VMODE = VDD/2,
NO LOAD
0V
VPWRGD
2V/div
0V
1ms/div
TRANSITION FROM FORCED PWM
TO SKIP MODE
MAX15038 toc25
VMODE
5V/div
VLX
5V/div
VOUT
0.5V/div
0V
2ms/div
0V
4ms/div
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