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| 型号： | MAX1857EUA47+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 2/10页 |
| 文件大小： | 0K |
| 描述： | IC REG LDO 4.75V/ADJ .5A 8-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 稳压器拓扑结构： | 正，固定式或可调式 |
| 输出电压： | 4.75V，1.25 V ~ 5 V |
| 输入电压： | 2.5 V ~ 5.5 V |
| 稳压器数量： | 1 |
| 电流 - 输出： | 500mA（最小） |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
500mA, Low-Dropout,
Ripple-Rejecting LDO in μMAX
ABSOLUTE MAXIMUM RATINGS
IN, SHDN , RST , SET to GND ....................................-0.3V to +6V
OUT to GND ................................................-0.3V to (V IN + 0.3V)
Output Short-Circuit Duration ........................................Indefinite
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
8-Pin μMAX (derate 4.5mW/°C above +70°C) .............362mW
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 = +5.25V, V OUT = 4.75V, SHDN = IN, SET = GND, T A = 0°C to +85°C , unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER
Input Voltage
Input Undervoltage Lockout
Output Voltage Accuracy
(Preset Mode)
Adjustable Output Voltage
Range
SYMBOL
V IN
V UVLO
V OUT
CONDITIONS
Rising, 75mV hysteresis
I OUT = 100mA, V OUT ≥ 2.5V
T A = +85 ° C V OUT < 2.5V
I OUT = 100mA, T A = 0 ° C to +85 ° C
I OUT = 1mA to 500mA, V IN > V OUT + 0.5V,
T A = 0 ° C to +85 ° C
V SET = 1.25V
MIN
2.5
2.0
-1
-1.5
-2
-3
1.25
TYP
2.15
MAX
5.5
2.3
+1
+1.5
+2
+3
5
UNITS
V
V
%
%
V
SET Voltage Threshold
(Adjustable Mode)
V SET
V IN = +2.7V,
V OUT set to 2.0V,
I OUT = 100mA
T A = +85 ° C
T A = 0 ° C to +85 ° C
1.229
1.219
1.250
1.271
1.281
V
Maximum Output Current
I OUT
V IN ≥ 2.7V
500
mA RMS
Short-Circuit Current Limit
I LIM
V OUT = 0, V IN ≥ 2.7V
0.55
1.2
2.2
A
In-Regulation Current Limit
V OUT > 96% of nominal value, V IN ≥ 2.7V
2.0
A
SET Dual Mode ? Threshold
50
100
150
mV
SET Input Bias Current
Ground-Pin Current
Dropout Voltage (Note 1)
I SET
I Q
V IN -
V OUT
V SET = 1.25V
I OUT = 1mA
I OUT = 500mA
I OUT = 500mA
-100
135
175
120
+100
250
175
nA
μ A
mV
Line Regulation
Load Regulation
? V LNR
? V LDR
V IN from (V OUT + 100mV) to 5.5V,
I LOAD = 5mA
I OUT = 1mA to 500mA
-0.15
0
0.4
+0.15
1.0
%/V
%
Output Voltage Noise
10Hz to 1MHz, C OUT = 3.3 μ F (ESR < 0.1 ? )
115
μ V RMS
SHUTDOWN
Shutdown Supply Current
SHDN Input Threshold
SHDN Input Bias Current
I OFF
V IH
V IL
SHDN = GND, V IN = 5.5V
2.5V < V IN < 5.5V
2.5V < V IN < 5.5V
SHDN = IN or GND
1.6
0.1
10
15
0.6
100
μ A
V
nA
Dual Mode is a trademark of Maxim Integrated Products.
2
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