MAX5080ATE Просмотр технического описания (PDF) - Maxim Integrated
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MAX5080ATE Datasheet PDF : 19 Pages
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1A, 40V, MAXPower Step-Down
DC-DC Converters
ELECTRICAL CHARACTERISTICS (continued)
(VIN = VON/OFF = 12V, VREG = VDVREG, VSYNC = PGND = SGND, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values
are at TA= + 25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
FB Offset Voltage
OSCILLATOR
Frequency
Maximum Duty Cycle
SYNC High-Level Voltage
ICOMP = -500µA to +500µA
fSW
DMAX
VSYNC = 0V
VSYNC = 0V, VIN = 4.5V, MAX5080
VSYNC = 0V, VIN = 7.5V, MAX5081
VSYNC = 0V, VIN ≤ 40V
-5
+5
mV
225
250
275
kHz
87
87
%
87
2.2
V
SYNC Low-Level Voltage
SYNC Frequency Range
PWM Modulator Gain
Ramp Level Shift (Valley)
fSYNC
fSYNC = 150kHz to 350kHz
0.8
V
150
350
kHz
10
V/V
0.3
V
POWER SWITCH
Switch On-Resistance
Switch Gate Charge
Switch Leakage Current
BST Leakage Current
CHARGE PUMP
C- Output Voltage Low
VBST - VLX = 6V
VBST - VLX = 6V
VIN = 40V, VLX = VBST = 0V
VBST = VLX = VIN = 40V
MAX5080 only, sinking 10mA
0.3
0.6
Ω
6
nC
10
µA
10
µA
0.1
V
C- Output Voltage High
MAX5080 only, relative to DVREG, sourcing
10mA
0.1
V
DVREG to C+ On-Resistance
LX to PGND On-Resistance
MAX5080 only, sourcing 10mA
Sinking 10mA
10
Ω
12
Ω
CURRENT-LIMIT COMPARATOR
Pulse-Skip Threshold
Cycle-by-Cycle Current Limit
Number of Consecutive ILIM
Events to Hiccup
IPFM
IILIM
100
200
300
mA
1.4
2
2.6
A
7
Hiccup Timeout
INTERNAL VOLTAGE REGULATOR
512
Clock
periods
Output Voltage
VREG
MAX5080
MAX5081
4.75
5
5.25
V
7.6
8
8.4
Line Regulation
Load Regulation
Dropout Voltage
VIN = 5.5V to 40V, MAX5080
VIN = 9.0V to 40V, MAX5081
IREG = 0 to 20mA
VIN = 4.5V, IREG = 20mA, MAX5080
VIN = 7.5V, IREG = 20mA, MAX5081
1
mV/V
1
0.25
V
0.5
V
0.5
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