MAX1536 Datasheet, PDF (4/19 Pages) Maxim Integrated Products – 3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-Down Regulator with Dynamic Output Voltage Control

3.6A, 1.4MHz, Low-Voltage, Internal-Switch Step-
Down Regulator with Dynamic Output Voltage Control
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1, V_IN = V_CC = V_SHDN = +3.3V, V_REFIN = +1.5V, SKIP = AGND, T_A = -40°C to +85°C, unless otherwise noted.) (Note 5)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
PWM CONTROLLER
Input Voltage
V_IN, V_CC
3.0
5.5
V
Feedback Voltage Accuracy
FB Input Bias Current
Dropout
PMOS Switch On-Resistance
NMOS Switch On-Resistance
Maximum Output Current
Current-Limit Threshold
Idle Mode Current Threshold
V_FB -
V_REFIN
V_CC = V_IN = +3.0V to +5.5V, I_LOAD = 0
I_FB
V_FB = 1.01 × V_REFIN
V_DO V_CC = V_IN = +3.0V, I_LOAD = 3A, FB = AGND
R_PMOS ^{VCC = VIN = +4.5V, ILOAD = 0.5A}
V_CC = V_IN = +3.0V, I_LOAD = 0.5A
R_NMOS ^{VCC = VIN = +4.5V, ILOAD = 0.5A}
V_CC = V_IN = +3.0V, I_LOAD = 0.5A
I_OUT(RMS) (Note 2)
I_LIMIT
(Note 3)
SKIP = AGND
-4
-50
4.0
0.21
+4
mV
+50
nA
330
mV
90
mΩ
110
80
mΩ
90
3.6
A
5.7
A
1.00
A
Switching Frequency
Off-Time
On-Time
Quiescent Supply Current
Shutdown Supply Currents
REFERENCE
f_SW
t_OFF
t_ON
I_CC + I_IN
I_CC + I_IN
I_IN
I_LX
(Note 2)
R_TOFF = 30.1kΩ
V_FB ≥ 0.3 × V_REFIN
R_TOFF = 110kΩ
R_TOFF = 499kΩ
(Note 2)
SKIP = AGND, V_FB = 1.01 × V_REFIN
SHDN = AGND; current into V_CC and IN;
LX = 0 or +3.3V
SHDN = AGND; current into IN; LX = 0
SHDN = AGND; current into LX; LX = +3.3V
0.24
0.85
3.8
0.3
1.4 MHz
0.37
1.15
µs
5.2
µs
750
µA
20
µA
20
20
REF Voltage
V_REF V_CC = V_IN = +3.0V to +5.5V
1.98
2.02
V
REFIN Input Voltage Range
V_REFIN
V_CC = V_IN = +3.0V to +5.5V,
V_CC > V_REFIN + 1.35V
0.7
2.0
V
FAULT DETECTION
PGOOD Lower Trip Threshold
No load, falling edge, hysteresis = 1% (Note 4)
-12.5
-8
%
PGOOD Upper Trip Threshold
No load, rising edge, hysteresis = 1% (Note 4)
+8
+12.5 %
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