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参数资料
| 型号： | MAX1921EUT-T |
| 厂商： | Maxim Integrated Products, Inc. |
| 元件分类： | DC/DC变换器 |
| 英文描述： | Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23 |
| 中文描述： | 低电压，400mA的降压型DC - DC转换器采用SOT23 |
| 文件页数： | 3/9页 |
| 文件大小： | 370K |
| 代理商： | MAX1921EUT-T |
M
Low-Voltage, 400mA Step-Down
DC-DC Converters in SOT23
_______________________________________________________________________________________
3
100
0
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 3.3V)
20
M
LOAD CURRENT ( mA)
E
40
60
50
80
70
30
10
90
V
IN
= 3.6V
V
IN
= 4.2V
V
IN
= 5V
100
0
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 2.5V)
20
M
LOAD CURRENT ( mA)
E
40
60
50
80
70
30
10
90
V
IN
= 2.7V
V
IN
= 3.3V
V
IN
= 5V
100
0
0.1
1
10
100
1000
EFFICIENCY vs. LOAD CURRENT
(V
OUT
= 1.5V)
20
M
LOAD CURRENT ( mA)
E
40
60
50
80
70
30
10
90
V
IN
= 2.5V
V
IN
= 3.3V
V
IN
= 5V
3.201
3.234
3.267
3.300
3.333
3.366
3.399
0
100
50
150
200
250
300
350
400
OUTPUT VOLTAGE ACCURACY vs. LOAD
(V
OUT
= 3.3V)
M
LOAD (mA)
O
V
IN
= 3.6V
V
IN
= 5V
V
IN
= 4.2V
2.425
2.450
2.475
2.500
2.525
2.550
2.575
0
100
50
150
200
250
300
350
400
OUTPUT VOLTAGE ACCURACY vs. LOAD
(V
OUT
= 2.5V)
M
LOAD (mA)
O
V
IN
= 3V
V
IN
= 5V
1.455
1.470
1.485
1.500
1.515
1.530
1.545
0
100
50
150
200
250
300
350
400
OUTPUT VOLTAGE ACCURACY vs. LOAD
(V
OUT
= 1.5V)
M
LOAD (mA)
O
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 2.5V
Typical Operating Characteristics
(C
IN
= 2.2μF ceramic, Circuit of Figure 1, components of Table 1, unless otherwise noted.)
ELECTRICAL CHARACTERISTICS (continued)
(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
I
LIMN
R
ONHS
R
ONSR
I
LXOFF
I
LXLEAK
I
LXLKR
t
ON(MIN)
t
OFF(MIN)
CONDITIONS
MIN
350
TYP
550
0.6
0.5
60
0.1
0.1
0.4
0.4
MAX
800
1.1
0.9
UNITS
mA
mA
μA
μA
μs
μs
Low-Side Current Limit
High-Side On-Resistance
Rectifier On-Resistance
Rectifier Off-Current Threshold
LX Leakage Current
LX Reverse Leakage Current
Minimum On-Time
Minimum Off-Time
I
LX
= -40mA, V
IN
= 3V
I
LX
= 40mA, V
IN
= 3V
IN =
SHDN
= 5.5V, LX = 0 to IN
IN unconnected, V
LX
= 5.5V,
SHDN
= GND
5.0
5.0
0.5
0.5
0.28
0.28
Note 1:
All devices are 100% production tested at T
A
= +25
°
C. Limits over the operating temperature range are guaranteed
by design.
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