Rainbow-electronics MAX15026 Bedienungsanleitung Seite 2
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MAX15026
Low-Cost, Small, 4.5V to 28V Wide Operating
Range, DC-DC Synchronous Buck Controller
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 12V, R
RT
= 27kΩ, R
LIM
= 30kΩ, C
VCC
= 4.7µF, C
IN
= 1µF, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at
T
A
= +25°C.) (Note 2)
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: Dissipation wattage values are based on still air with no heatsink. Actual maximum power dissipation is a function of heat
extraction technique and may be substantially higher. 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 consid-
erations, refer to www.maxim-ic.com/thermal-tutorial
.
IN to GND ...............................................................-0.3V to +30V
BST to GND ............................................................-0.3V to +36V
LX to GND .................................................................-1V to +30V
EN to GND................................................................-0.3V to +6V
PGOOD to GND .....................................................-0.3V to +30V
BST to LX..................................................................-0.3V to +6V
DH to LX ...............................................….-0.3V to (V
BST
+ 0.3V)
DRV to GND .............................................................-0.3V to +6V
DL to GND ................................................-0.3V to (V
DRV
+ 0.3V)
V
CC
to GND...............-0.3V to the lower of +6V and (V
IN
+ 0.3V)
All Other Pins to GND.................................-0.3V to (V
CC
+ 0.3V)
V
CC
Short Circuit to GND...........................................Continuous
DRV Input Current.............................................................600mA
PGOOD Sink Current ............................................................5mA
Continuous Power Dissipation (T
A
= +70°C) (Note 1)
14-Pin TDFN-EP, Multilayer Board
(derate 24.4mW/°C above +70°C)..............................1951mW
Operating Temperature Range ...........................-40°C to +85°C
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
GENERAL
4.5 28
Input Voltage Range V
IN
V
IN
= V
CC
= V
DRV
4.5 5.5
V
Quiescent Supply Current V
FB
= 0.9V, no switching 1.75 2.75 mA
Shutdown Supply Current I
IN_SBY
EN = GND 290 500 µA
Enable to Output Delay 480 µs
V
CC
High to Output Delay EN = V
CC
375 µs
V
CC
REGULATOR
6V < V
IN
< 28V, I
LOAD
= 25mA
Output Voltage V
CC
V
IN
= 12V, 1mA < I
LOAD
< 70mA
5.0 5.25 5.5 V
V
CC
Regulator Dropout V
IN
= 4.5V, I
LOAD
= 70mA 0.28 V
V
CC
Short-Circuit Output Current V
IN
= 5V 100 200 300 mA
V
CC
Undervoltage Lockout V
CC_UVLO
V
CC
rising 3.8 4.0 4.2 V
V
CC
Undervoltage Lockout
Hysteresis
400 mV
ERROR AMPLIFIER (FB, COMP)
FB Input Voltage Set-Point V
FB
582 592 597 mV
FB Input Bias Current I
FB
V
FB
= 0.6V -250 +250 nA
FB to COMP Transconductance g
M
I
COMP
= ±20µA 600 1200 1800 µS
Amplifier Open-Loop Gain 80 dB
Amplifier Unity-Gain Bandwidth Capacitor from COMP to GND = 50pF 4 MHz
V
COMP-RAMP
Minimum Voltage 160 mV
COMP Source/Sink Current I
COMP
V
COMP
= 1.4V 50 80 110 µA
- MAX15026 1
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