參數(shù)資料
型號(hào)： MAX1921EUT-T
廠商： Maxim Integrated Products, Inc.
元件分類(lèi)： DC/DC變換器
英文描述： Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23
中文描述： 低電壓，400mA的降壓型DC - DC轉(zhuǎn)換器采用SOT23
文件頁(yè)數(shù)： 2/9頁(yè)
文件大?。?/td> 370K
代理商： MAX1921EUT-T
M
IN, FB,
SHDN
to AGND . . . . . . . . . . . . . . . . . . . . .-0.3V to +6V
OUT to AGND, LX to PGND . . . . . . . . . . . .-0.3V to (IN + 0.3V)
AGND to PGND . . . . . . . . . . . . . . . . . . . . . . . . . .-0.3V to +0.3V
OUT Short Circuit to GND . . . . . . . . . . . . . . . . . . . . . . . . . . .10s
Continuous Power Dissipation (TA = +70°C)
6-Pin SOT23-6 (derate 8.7mW/°C above +70°C) . . . .695mW
Operating Temperature Range . . . . . . . . . . . . . .-40°C to +85°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . .+150°C
Storage Temperature . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Lead Temperature (soldering 10s) . . . . . . . . . . . . . . . . .+300°C
Low-Voltage, 400mA Step-Down
DC-DC Converters in SOT23
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
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.
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.6V,
SHDN
= IN, T
A
= 0°C to +85°C. Typical parameters are at T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
2.5
TYP
MAX
5.5
UNITS
I(LX) < 400mA
Input Voltage Range
V
IN
I(LX) < 200mA
(MAX1921EUT15, MAX1921EUT18)
2.0
2.5
V
Startup Voltage
2.0
1.95
V
V
IN
rising
V
IN
falling
1.85
1.65
200
50
UVLO Threshold
UVLO
1.50
V
UVLO Hysteresis
Quiescent Supply Current
mV
μA
I
IN
No switching, no load
70
Quiescent Supply Current
Dropout
I
IN
SHDN
= IN, OUT/FB = 0
220
300
μA
Shutdown Supply Current
I
SHDN
SHDN
= GND
I
OUT
= 0, T
A
= +25
°
C
I
OUT
= 0 to 400mA, T
A
= -40
°
C to +85
°
C
I
OUT
= 0 to 200mA, T
A
= -40
°
C to +85
°
C
SHDN
= 0
OUT at regulation voltage
0.1
4.0
+1.5
+3
+3
1
16
μA
-1.5
-3
-3
Output Voltage Accuracy
(MAX1921)
%
OUT BIAS Current
I
OUT
8
μA
Output Voltage Range (MAX1920)
Figure 4, IN = 4.5V
1.25
4.00
V
T
A
= 25
°
C
1.231
1.220
1.210
1.25
1.25
1.269
1.280
1.280
FB Feedback Threshold
(MAX1920)
V
FB
T
A
= -40
°
C to +85
°
C
V
FB Feedback Hysteresis
(MAX1920)
V
HYS
5
mV
FB Bias Current (MAX1920)
Load Regulation
Line Regulation
I
FB
FB = 1.5V
I
OUT
= 0 to 400mA
V
IN
= 2.5V to 5.5V
0.01
0.005
0.2
0.20
μA
%/mA
%/V
V
V
μA
mA
SHDN
Input Voltage High
SHDN
Input Voltage Low
SHDN
Leakage Current
High-Side Current Limit
V
IH
V
IL
I
SHDN
I
LIMP
1.6
0.4
1.000
950
SHDN
= GND or IN
0.001
730
525
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