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MAX618 Fiches technique(PDF) 2 Page - Maxim Integrated Products

No de pièce MAX618
Description  28V, PWM, Step-Up DC-DC Converter
Download  14 Pages
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Fabricant  MAXIM [Maxim Integrated Products]
Site Internet  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

MAX618 Fiches technique(HTML) 2 Page - Maxim Integrated Products

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28V, PWM, Step-Up DC-DC Converter
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VIN = +6V, PGND = GND, CVL = 4.7µF, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
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 to GND ...............................................................-0.3V to +30V
LX to GND ..............................................................-0.3V to +30V
VL to GND ................................................................-0.3V to +6V
SHDN, COMP, FB to GND ............................-0.3V to (VL + 0.3V)
PGND to GND.....................................................................±0.3V
Continuous Power Dissipation (TA = +70°C) (Note 1)
16-Pin QSOP (derate 15mW/°C above +70°C)...................1W
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: With part mounted on 0.9 in.2 of copper.
Shutdown Supply Current
IIN
38
µA
VIN = 28V, VFB = 1.6V, SHDN = GND
Maximum Duty Cycle
DC
90
95
%
PARAMETER
SYMBOL
MIN
TYP
MAX
UNITS
VL Output Voltage
VVL
2.9
3.05
3.2
V
Supply Current, Full Load
IIN
2.5
3.5
mA
Supply Current, Full Load, VL
Connected to IN
IIN
5
6.5
mA
VL Load Regulation
∆VVL
25
40
mV
VL Undervoltage Lockout
2.58
2.7
2.8
V
FB Set Voltage
VFB
1.47
1.5
1.53
V
FB Input Bias Current
IFB
150
nA
Supply Current, No Load
Input Voltage
VIN
328
V
IIN
500
700
µA
Line Regulation
∆VOUT
0.01
0.08
%/V
Load Regulation
∆VOUT
0.2
%
LX Voltage
VLX
28
V
LX Switch Current Limit
ILXON
1.7
2.2
2.7
A
Idle Mode Current-Limit
Threshold
0.25
0.35
0.45
A
LX On-Resistance
RLXON
0.3
0.6
LX Leakage Current
ILXOFF
0.02
10
µA
COMP Maximum Output Current
ICOMP
100
200
µA
COMP Current vs. FB Voltage
Transconductance
0.8
1
mmho
SHDN Input Logic Low
VIL
0.8
V
SHDN Input Logic High
VIH
2.0
V
Shutdown Input Current
1
µA
Switching Frequency
f
200
250
300
kHz
CONDITIONS
VIN = 3V to 6V, VOUT = 12V
VIN = 3.5V or 28V, no load
VOUT = 12V, ILOAD = 10mA to 500mA
VIN = 3.4V to 28V, VFB = 1.4V, SHDN = VL,
VVL < VIN
VIN = 3V to 5.5V, VFB = 1.4V, SHDN = VL = IN
ILOAD = 0 to 2mA, VFB = 1.6V
Rising edge, 1% hysteresis
PWM mode
VFB = 1.6V
VLX = 28V
FB = GND
VIN = 3V to 28V, VFB = 1.6V, SHDN = VL
∆FB = 0.1V
SHDN = GND or VL


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