MAX1652 Datasheet, PDF (8/28 Pages) Maxim Integrated Products – High-Efficiency, PWM, Step-Down DC-DC Controllers in 16-Pin QSOP

High-Efficiency, PWM, Step-Down
DC-DC Controllers in 16-Pin QSOP
Typical Operating Characteristics (continued)
(Circuit of Figure 1, SKIP = GND, T_A = +25°C, unless otherwise noted.)
DROPOUT VOLTAGE vs.
LOAD CURRENT (3.3V/3A CIRCUIT)
500
OUTPUT SET FOR 5V (FB = V_L)
V_OUT > 4.85V
400
300
200
f = 300kHz
100
0
0.01
PULSE-WIDTH-MODULATION
MODE WAVEFORMS
MAX1652-13
f = 150kHz
0.1
1
10
LOAD CURRENT (A)
IDLE-MODE WAVEFORMS
MAX1652-14
OUTPUT
VOLTAGE
10mV/div,
AC
OUTPUT
VOLTAGE
50mV/div,
AC
LX
VOLTAGE
5V/div
TIME (1µs)
V_IN = 6V, 3.3V/3A CIRCUIT
DROPOUT WAVEFORMS
MAX1652-15
OUTPUT
VOLTAGE
10mV/div,
AC
LX
VOLTAGE
5V/div
TIME (2.5µs)
I_LOAD = 300mA, V_IN = 10V, 3.3V/3A CIRCUIT
LOAD-TRANSIENT RESPONSE
MAX1652-16
OUTPUT
VOLTAGE
100mV/div,
AC
LX
VOLTAGE
5V/div
TIME (5µs)
V_IN = 5.1V, NO LOAD, 3.3V/3A CIRCUIT,
SET TO 5V OUTPUT (FB = VL)
LOAD
CURRENT
TIME (10µs)
V_IN = 15V, 3.3V/3A CIRCUIT
8 _______________________________________________________________________________________
2A/div