MAX1623 Datasheet, PDF (5/12 Pages) Maxim Integrated Products – 3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches

3A, Low-Voltage, Step-Down Regulator with
Synchronous Rectification and Internal Switches
____________________________ Typical Operating Characteristics (continued)
(Circuit of Figure 2, T_A = +25°C, unless otherwise noted.)
START-UP AND SHUTDOWN TRANSIENT
START-UP AND SHUTDOWN TRANSIENT
LOAD-TRANSIENT RESPONSE
(FBSEL = REF)
A
B
C
1ms/div
V_IN = 5V, V_OUT = 3.3V, I_LOAD = 3A,
WAVEFORM AVERAGED
A: V_OUT, 2V/div
B: I_IN, 1A/div
C: V_SHDN, 5V/div
A
B
C
1ms/div
V_IN = 5V, V_OUT = 3.3V, I_LOAD = 2A,
WAVEFORM AVERAGED
A: V_OUT, 2V/div
B: I_IN, 1A/div
C: V_SHDN, 5V/div
I_LOAD
0 to 3A
V_OUT
50mV
AC-COUPLED
f = 300kHz
20µs/div
LOAD-TRANSIENT RESPONSE
(FBSEL = REF)
I_LOAD
0 to 2A
V_OUT
50mV
AC-COUPLED
f = 300kHz
20µs/div
LINE-TRANSIENT RESPONSE
V_IN = 4.5V
to 5.5V
AC-COUPLED
(1V/div)
V_OUT = 3.3V
AC-COUPLED
I_OUT = 1.5A
(20mV/div)
20µs/div
LINE-TRANSIENT RESPONSE
V_IN = 4.5V
to 5.5V
AC-COUPLED
(1V/div)
V_OUT = 3.3V
AC-COUPLED
I_OUT = 100mA
(20mV/div)
20µs/div
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