Rainbow Electronics MAX17101 - Manual (Page 12)

MAX17101
Dual Quick-PWM, Step-Down Controller
with Low-Power LDO, RTC Regulator
12 ______________________________________________________________________________________
3.3V SMPS LOAD TRANSIENT
MAX17101 toc18
40 μs/div
A. LOAD CURRENT, 5A/div
B. 3.3V SMPS OUTPUT, 100mV/div
C. INDUCTOR CURRENT, 5A/div
3.3V
0.5A
0A
A
B
C
6.5A
POWER REMOVAL
(SMPS UVLO RESPONSE)
MAX17101 toc19
10ms/div
A. INPUT VOLTAGE, 5V/div
B. 5V LDO OUTPUT, 2V/div
5V
5V
5V
A
B
C
D
7V
C. 5V SMPS, 2V/div
D. PGOOD1, 5V/div
SHUTDOWN WAVEFORMS
(SWITCHING REGULATORS)
MAX17101 toc16
200 μs/div
A. ON1, 5V/div
B. 5V SMPS OUTPUT,
2V/div
5V
5V
0A
0V
0V
0V
A
B
C
D
5V
C. PGOOD1, 2V/div
D. INDUCTOR CURRENT,
5A/div
5V SMPS LOAD TRANSIENT
(PWM MODE)
MAX17101 toc17
40 μs/div
A. LOAD CURRENT, 2A/div
B. 5V SMPS OUTPUT, 100mV/div
C. INDUCTOR CURRENT, 2A/div
5V
0A
0A
A
B
C
3.1A
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V IN = 12V, V DD = V CC = 5V, TON = REF, T A = +25°C, unless otherwise noted.)