MAX1556_10 Datasheet, PDF (2/12 Pages) Maxim Integrated Products – 16μA IQ, 1.2A PWM Step-Down DC-DC Converters

16µA I_Q, 1.2A PWM DC-DC
Step-Down Converters
ABSOLUTE MAXIMUM RATINGS
IN, INP, OUT, D2, SHDN to GND ..........................-0.3V to +6.0V
SS, D1 to GND .............................................-0.3V to (V_IN + 0.3V)
PGND to GND .......................................................-0.3V to +0.3V
LX Current (Note 1)...........................................................±2.25A
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T_A = +70°C)
10-Pin TDFN (derate 24.4mW/°C above +70°C) .......1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Note 1: LX has internal clamp diodes to GND and IN. Applications that forward bias these diodes should take care not to exceed
the IC’s package power-dissipation limits.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V_IN = V_INP = V_SHDN = 3.6V, T_A = - 40°C to +85°C. Typical values are at T_A = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Input Voltage
Undervoltage-Lockout Threshold
Quiescent Supply Current
Shutdown Supply Current
Output Voltage Range
Output Accuracy
Maximum Output Current
OUT Bias Current
V_IN rising and falling, 35mV hysteresis (typ)
No switching, D1 = D2 = GND
Dropout
SHDN = GND
T_A = +25°C
T_A = +85°C
No load
T_A = 0°C to +85°C
(Note 2)
300mA load
600mA load
1200mA load, MAX1556
1200mA load, MAX1556A
No load
T_A = -40°C to +85°C ^{300mA load}
(Note 2)
600mA load
1200mA load, MAX1556
MAX1556/MAX1556A
MAX1557
D1 = D2 = GND
T_A = +25°C
MAX1556/MAX1557 _{TA = +85°C}
For preset output voltages
2.6
5.5
V
2.20 2.35 2.55
V
16
25
µA
27
42
0.1
1
µA
0.1
0.75
V_IN
V
-0.25 +0.75 +1.75
-0.75
0
+0.75
-1.5 -0.75
0
-2.75 -2.25 -1.25
-2.25
%
-0.75
+2.25
-1.5
+1.5
-2.25
+0.50
-4.0
-1.0
1200
mA
600
0.01 0.1
0.01
µA
3
4.5
FB Threshold Accuracy
D1 = D2 = GND,
V_OUT = 0.75V at
300mA (typ),
T_A = 0°C to +85°C
MAX1556/MAX1557
D1 = D2 = GND,
V_OUT = 0.75V
at 300mA (typ),
T_A = -40°C to +85°C
MAX1556/MAX1557
No load
300mA load
600mA load
1200mA load, MAX1556 only
No load
300mA load
600mA load
1200mA load, MAX1556 only
-0.50 +0.75 +1.75
-1.2
0
+1.2
-1.75 -0.75 +0.25
-3.25 -2.25 -1.25
%
-1.25
+2.25
-1.75
+1.50
-2.75
+0.25
-4.25
-1.00
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