MAX1837 데이터 시트보기 (PDF) - Maxim Integrated
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MAX1837 Datasheet PDF : 15 Pages
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MAX1836/MAX1837
24V Internal Switch, 100% Duty Cycle,
Step-Down Converters
Electrical Characteristics (continued)
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN, TA = 0°C to +85°C. Typical values are at TA = +25°C,
unless otherwise noted.)
PARAMETER
Zero-Crossing Timeout
LX Switch Leakage Current
Dropout Voltage
Line Regulation
Load Regulation
Shutdown Input Threshold
Shutdown Leakage Current
Thermal Shutdown
SYMBOL
VDROPOUT
VSHDN
ISHDN
CONDITIONS
LX does not rise above the threshold
VIN = 18V, LX = GND, TA = +25°C
IOUT = 100mA, VIN = 5V
VIN = 5V to 24V
IOUT = 0 to 125mA (MAX1836) or 250mA
(MAX1837)
VIN = 4.5V to 24V (Note 3)
VSHDN = 0 or 24V
10°C hysteresis (typ)
MIN TYP
30
120
0.05
0.3
0.8
-1
160
MAX
1
2.4
+1
UNITS
µs
µA
mV
%
%
V
µA
°C
Electrical Characteristics
(Circuits of Figures 1 (MAX1836) and 2 (MAX1837), VIN = 12V, SHDN = IN, TA = -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
Input Supply Range
Input Undervoltage Lockout
Threshold
Input Supply Current
Input Shutdown Current
Output Voltage (Preset Mode)
Output Voltage Range
(Adjustable Mode)
Feedback Set Voltage
(Adjustable Mode)
OUT Bias Current
FB Dual Mode Threshold
LX Switch Minimum Off-Time
LX Switch Maximum On-Time
LX Switch On-Resistance
LX Current Limit
SYMBOL
VIN
VUVLO
IIN
VOUT
CONDITIONS
VIN rising
VIN falling
SHDN = GND
FB = GND,
ILOAD = 0 to 125mA
(MAX1836) or
250mA (MAX1837)
MAX183_EUT50,
MAX183_ETT50
MAX183_EUT33,
MAX183_ETT33
VOUT
(Note 2)
VFB
tOFF(MIN)
tON(MAX)
RLX
ILIM
VOUT = 5V
VFB rising or falling
VFB = 1.3V
VIN = 6V
MAX1836
MAX1837
MIN
4.5
3.55
3.45
4.80
3.168
1.25
1.200
50
0.2
7
250
500
TYP MAX UNITS
24
V
4.4
V
4.3
25
µA
7
µA
5.20
V
3.432
VIN
V
1.300
V
7.4
µA
150
mV
0.6
µs
13
µs
2
Ω
450
mA
900
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