Rainbow Electronics MAX15020 User Manual
Page 2
MAX15020
2A, 40V Step-Down DC-DC Converter with
Dynamic Output-Voltage Programming
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 36V, V
REG
= V
DVREG
, V
PGND
= V
GND
= V
EP
= 0V, V
SYNC
= 0V, C
REFOUT
= 0.1µF, T
A
= T
J
= -40°C to +125°C, FSEL = REG,
unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
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.
IN, ON/OFF to GND........…. ...................................-0.3V to +45V
LX to GND................................................-0.715V to (V
IN
+ 0.3V)
BST to GND ..................................................-0.3V to (V
IN
+ 12V)
BST to LX................................................................-0.3V to +12V
PGND, EP to GND .................................................-0.3V to +0.3V
REG, DVREG, SYNC to GND .................................-0.3V to +12V
FB, COMP, FSEL, REFIN, REFOUT,
SS to GND .............................................-0.3V to (V
REG
+ 0.3V)
Continuous Current through Internal Power MOSFET
T
J
= +125°C..........................................................................4A
T
J
= +150°C.......................................................................2.7A
Continuous Power Dissipation (T
A
= +70°C)
20-Pin Thin QFN, single-layer board (5mm x 5mm)
(derate 21.3mW/°C above +70°C) ...........................1702.1mW
20-Pin Thin QFN, multilayer board (5mm x 5mm)
(derate 34.5mW/°C above +70°C) ...........................2758.6mW
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range ............................-60°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Voltage Range
V
IN
7.5
40.0
V
UVLO Rising Threshold
UVLO
RISING
6.80
7.20
7.45
V
UVLO Falling Threshold
UVLO
FALLING
6.0
6.5
7.0
V
UVLO Hysteresis
UVLO
HYST
0.7
V
Quiescent Supply Current
V
IN
= 40V, V
FB
= 1.3V
1.6
2.8
mA
Switching Supply Current
V
IN
= 40V, V
FB
= 0V
14.5
mA
Shutdown Current
I
SHDN
V
ON/OFF
= 0.2V, V
IN
= 40V
6
15
µA
ON/
OFF CONTROL
Input-Voltage Threshold
V
ON/OFF
V
ON/OFF
rising
1.200
1.225
1.270
V
Input-Voltage Threshold
Hysteresis
120
mV
Input Bias Current
V
ON/OFF
= 0V to V
IN
-250
+250
nA
Shutdown Threshold Voltage
V
SD
0.2
V
INTERNAL VOLTAGE REGULATOR (REG)
Output Voltage
I
REG
= 0 to 20mA
7.1
8.3
V
OSCILLATOR
V
FSEL
= 0V
450
550
Frequency
f
SW
V
FSEL
= V
REG
270
330
kHz
V
FSEL
= 0V
85
Maximum Duty Cycle
D
MAX
V
FSEL
= V
REG
90
%
SYNC/FSEL High-Level Voltage
2
V
SYNC/FSEL Low-Level Voltage
0.8
V
SYNC Frequency Range
f
SYNC
V
FSEL
= V
REG
100
550
kHz