Rainbow Electronics MAX15041 User Manual
Page 2
MAX15041
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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)
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.
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
.
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
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
STEP-DOWN CONVERTER
Input-Voltage Range
V
IN
4.5
28
V
Input Supply Current
I
IN
Switching
2.1
4
mA
V
EN
= 0V, V
DD
regulated by internal
2
12
Shutdown Input Supply Current
V
EN
= 0V, V
IN
= V
DD
= 5V
18
28
µA
ENABLE INPUT
EN Shutdown Threshold Voltage
V
EN_SHDN
V
EN
rising
1.4
V
EN Shutdown Voltage Hysteresis
V
EN_HYST
100
mV
V
EN_LOCK
V
EN
rising
1.7
1.95
2.15
V
EN Lockout Threshold Voltage
V
EN_LOCK_HYST
V
EN
falling
100
mV
EN Input Current
I
EN
V
EN
= 2.9V
2
5.3
9
µA
POWER-GOOD OUTPUT
PGOOD Threshold
V
PGOOD_TH
V
FB
rising
540
560
584
mV
PGOOD Threshold Hysteresis
V
PGOOD_HYST
15
mV
PGOOD Output Low Voltage
V
PGOOD_OL
I
PGOOD
= 5mA, V
FB
= 0.5V
35
100
mV
PGOOD Leakage Current
I
PGOOD
V
PGOOD
= 5V, V
FB
= 0.7V
10
nA
ERROR AMPLIFIER
Error Amplifier
Transconductance
g
MV
1.6
mS
Error Amplifier Voltage Gain
A
VEA
90
dB
FB Set-Point Accuracy
V
FB
600
606
612
mV
V
FB
= 0.5V
-100
+100
FB Input Bias Current
I
FB
V
FB
= 0.7V
-100
+100
nA