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参数资料
| 型号： | MAX1734EUK18+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/8页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC 1.8V SOT23-5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 1.8V |
| 输入电压： | 2.7 V ~ 5.5 V |
| 频率 - 开关： | 1.2MHz |
| 电流 - 输出： | 250mA |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SC-74A，SOT-753 |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | SOT-23-5 |
Low-Voltage, Step-Down DC-DC Converters
in SOT23
ABSOLUTE MAXIMUM RATINGS
IN, SHDN to GND .....................................................-0.3V to +6V
OUT, FB, LX to GND ....................................-0.3V to (V IN + 0.3V)
OUT Short Circuit to GND ..........................................Continuous
Continuous Power Dissipation (T A = +70°C)
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW
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 = +2.7V to +5.5V, SHDN = IN, T A = 0°C to +85°C. Typical values are at T A = +25°C, unless otherwise noted.)
PARAMETER
Input Voltage Range
SYMBOL
V IN
CONDITIONS
MIN
2.7
TYP
MAX
5.5
UNITS
V
Startup Voltage
V START
2.0
V
UVLO Threshold
V UVLO
V IN rising
V IN falling
1.55
1.85
1.65
1.95
V
UVLO Hysteresis
200
mV
Quiescent Supply Current
Shutdown Supply Current
I IN
I SHDN
No switching, no load (FB/OUT above trip
point)
SHDN = GND
40
0.01
70
4
μ A
μ A
Output Voltage Range (MAX1733)
Output Voltage Accuracy
(MAX1734)
Load Regulation
Line Regulation
V OUT
I OUT = 0, T A = +25 ° C
I OUT = 0 to 250mA
I OUT = 0 to 250mA
V IN = 2.7V to 5.5V
1.25
-1.5
-3
0
0
2.0
+1.5
+3
V
%
%/mA
%/V
OUT Sense Current (MAX1734)
V OUT = V REG , V IN = V SHDN = 5V
4
8
μ A
FB Feedback Threshold
(MAX1733)
FB Leakage Current (MAX1733)
V FB
I FB
T A = +25 ° C, V IN = 3.6V
V IN = 3.6V
V FB = 1.5V
1.231
1.220
1.250
0.001
1.269
1.280
0.2
V
μ A
SHDN Input High Voltage
SHDN Input Low Voltage
V IH
V IL
2.7V < V IN < 5.5V
2.7V < V IN < 5.5V
1.6
0.4
V
V
SHDN Leakage Current
High-Side Current Limit
Low-Side Current Limit
High-Side On-Resistance
Rectifier On-Resistance
Rectifier Off-Current Threshold
LX Leakage Current
LX Reverse Leakage Current
I SHDN
I LIMP
I LIMN
R ONP
R ONN
I LXOFF
I LXLEAK
I LXLK,R
SHDN = GND or IN
I LX = -50mA, V IN = 3.0V
I LX = -50mA, V IN = 5.5V
I LX = -50mA, V IN = 3.0V
I LX = -50mA, V IN = 5.5V
V IN = 5.5V, V LX = 0 to V IN
IN unconnected, V LX = 5.5V, SHDN = GND
300
200
0.001
425
325
0.7
0.5
1.0
0.8
40
0.1
0.1
1
535
430
1.4
1.1
2
1.6
5
5
μ A
mA
mA
?
?
mA
μ A
μ A
Minimum On-Time
Minimum Off-Time
t ON(MIN)
t OFF(MIN)
V IN = 3.6V
V IN = 3.6V
0.28
0.28
0.4
0.4
0.5
0.5
μ s
μ s
2
_______________________________________________________________________________________
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