MAX15041 Datasheet, PDF (2/16 Pages) Maxim Integrated Products – Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches

Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
ABSOLUTE MAXIMUM RATINGS
IN to SGND.............................................................-0.3V to +30V
EN to SGND .................................................-0.3V to (V_IN + 0.3V)
LX to PGND ................................-0.3V to min (+30V, V_IN + 0.3V)
LX to PGND .....................-1V to min (+30V, V_IN + 0.3V) for 50ns
PGOOD to SGND .....................................................-0.3V to +6V
V_DD to SGND............................................................-0.3V to +6V
COMP, FB, SS to SGND..............-0.3V to min (+6V, V_DD + 0.3V)
BST to LX .................................................................-0.3V to +6V
BST to SGND .........................................................-0.3V to +36V
SGND to PGND ....................................................-0.3V to +0.3V
LX Current (Note 1) ....................................................-5A to +8A
Converter Output Short-Circuit Duration ...................Continuous
Continuous Power Dissipation (T_A = +70°C)
16-Pin TQFN-EP (derate 14.7mW/°C above +70°C)
Multilayer Board .........................................................1666mW
Package Thermal Resistance (Note 2)
θ_JA ................................................................................48°C/W
θ_JC ..................................................................................7°C/W
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
Note 1: LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed
the IC’s package power dissipation.
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
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 = 12V, C_VDD = 1µF, C_IN = 22µF, T_A = T_J = -40°C to +85°C, typical values are at T_A = +25°C, unless otherwise noted.) (Note 3)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
STEP-DOWN CONVERTER
Input-Voltage Range
Input Supply Current
Shutdown Input Supply Current
ENABLE INPUT
V_IN
4.5
28
V
I_IN
Switching
2.1
4
mA
V_EN = 0V, V_DD regulated by internal
V_EN = 0V, V_IN = V_DD = 5V
2
12
µA
18
28
EN Shutdown Threshold Voltage
EN Shutdown Voltage Hysteresis
EN Lockout Threshold Voltage
EN Input Current
POWER-GOOD OUTPUT
V_{EN_SHDN} V_EN rising
V_{EN_HYST}
V_{EN_LOCK} V_EN rising
V_{EN_LOCK_HYST} V_EN falling
I_EN
V_EN = 2.9V
1.4
V
100
mV
1.7
1.95 2.15
V
100
mV
2
5.3
9
µA
PGOOD Threshold
PGOOD Threshold Hysteresis
PGOOD Output Low Voltage
PGOOD Leakage Current
ERROR AMPLIFIER
V_{PGOOD_TH}
V_{PGOOD_HYST}
V_{PGOOD_OL}
I_PGOOD
V_FB rising
I_PGOOD = 5mA, V_FB = 0.5V
V_PGOOD = 5V, V_FB = 0.7V
540
560
584
mV
15
mV
35
100
mV
10
nA
Error Amplifier
Transconductance
g_MV
1.6
mS
Error Amplifier Voltage Gain
FB Set-Point Accuracy
FB Input Bias Current
A_VEA
V_FB
I_FB
V_FB = 0.5V
V_FB = 0.7V
90
dB
600
606
612
mV
-100
-100
+100
nA
+100
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