MAX618EEE Просмотр технического описания (PDF) - Maxim Integrated
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MAX618EEE Datasheet PDF : 15 Pages
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MAX618
28V Internal Switch, Step-Up DC-DC Converter
Electrical Characteristics (continued)
(VIN = +6V, PGND = GND, CVL = 4.7μF, TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
Input Voltage
Supply Current, No Load
Supply Current, Full Load,
VL Connected to IN
Supply Current, Full Load
Supply Current Shutdown
VL Output Voltage
VL Undervoltage Lockout
FB Set Voltage
LX Voltage Range
LX Switch Current Limit
LX On-Resistance
Switching Frequency
SYMBOL
VIN
IIN
IIN
IIN
IIN
VVL
VVL
VFB
VLXON
ILXON
RLXON
f
CONDITIONS
VIN = 3V to 28V, VFB = 1.6V, SHDN = VL
VIN = 3V to 5.5, VFB = 1.4V,
SHDN = VL = IN
VIN = 3.4V to 28V, VFB = 1.4V,
SHDN = VL, VVL < VIN
VIN = 28V, VFB = 1.6V, SHDN = GND
VIN = 3.5V or 28V, no load
Rising edge, 1% hysteresis
PWM mode
MIN TYP MAX
3
28
800
7.5
2.85
2.55
1.455
1.4
188
4
10
3.3
2.85
1.545
28
3
0.6
312
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
UNITS
V
µA
mA
mA
µA
V
V
V
V
A
Ω
kHz
Typical Operating Characteristics
(Circuit of Figure 1, TA = +25°C.)
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 12V)
100
VIN = 8V
90
80
VIN = 3V VIN = 5V
70
60
50
40
30
20
10
0
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
EFFICIENCY vs. OUTPUT CURRENT
(VOUT = 28V)
100
VIN = 12V
90
VIN = 5V
80
70
VIN = 3V
60
50
40
30
20
10
0
0.1
1
10
100
1000
OUTPUT CURRENT (mA)
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE
500
480
VOUT = 12V
460
440
420
400
380
360
340
320
2 3 4 5 6 7 8 9 10 11 12
SUPPLY VOLTAGE (V)
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