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參數(shù)資料
| 型號： | MAX8881EUT50-T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 12V, Ultra-Low-IQ, Low-Dropout Linear Regulators with POK |
| 中文描述： | 5 V FIXED POSITIVE LDO REGULATOR, 0.2 V DROPOUT, PDSO6 |
| 封裝： | TINY SOT-23, 6 PIN |
| 文件頁數(shù)： | 6/8頁 |
| 文件大?。?/td> | 228K |
| 代理商： | MAX8881EUT50-T |
M
12V, Ultra-Low-I
Q
, Low-Dropout
Linear Regulators with POK
6
_______________________________________________________________________________________
Reverse Battery Protection
The MAX8880/MAX8881 have a unique protection
scheme that limits the reverse supply current to less
than 1mA when V
IN
is forced below ground. The circuit
monitors the polarity of IN, disconnecting the internal
circuitry and parasitic diodes when the battery is
reversed. This feature prevents the device from electri-
cal stress and damage when the battery is connected
backwards. If reverse battery protection is needed,
drive
SHDN
through a 100k
resistor.
Current Limiting
The MAX8880/MAX8881 include a current limiter. When
the output is shorted to ground, drive to the output
PMOS is limited. The output can be shorted to ground
without damage to the part.
Thermal Overload Protection
Thermal overload protection limits total power dissipa-
tion in the MAX8880/MAX8881. When the internal junc-
tion temperature exceeds T
J
= +160
°
C, the thermal
sensor signals the shutdown logic, turning off the pass
transistor and allowing the IC to cool. The thermal sen-
sor turns the pass transistor on again after the IC
’
s
junction temperature cools by 15
°
C, resulting in a
pulsed output during continuous thermal-overload con-
ditions.
Thermal-overload protection is designed to protect the
MAX8880/MAX8881 in the event of fault conditions. For
continuous operation, do not exceed the absolute maxi-
mum junction temperature rating of T
J(MAX)
= +150
°
C.
Operating Region and Power Dissipation
The MAX8880/MAX8881
’
s maximum power dissipation
depends on the thermal resistance of the case and cir-
cuit board, the temperature difference between the die
junction and ambient air, and the rate of airflow. The
power dissipation in the device is P = I
OUT
(V
IN
-
V
OUT
). The maximum power dissipation allowed is:
IN
OUT
FB
GND
C2
4.7
μ
F
C1
1
μ
F
SHDN
2.5V TO 12V
UP TO 200mA
R3
R4
REGULATION OK
POK
MAX8880
V
IN
V
OUT
1.25V TO 5.5V
Figure 3. Adjustable Output Using External Feedback Resistors
SHUTDOWN
LOGIC
ERROR
AMP
1.25V
REF
91%
REF
P
OUT
FB
POK
GND
IN
SHDN
MAX8881
THERMAL
SENSOR
REVERSE
BATTERY
PROTECTION
MOS DRIVER
WITH I
LIMIT
POK
Figure 2. Functional Diagram
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8882EUT | 制造商:Maxim Integrated Products 功能描述:DUAL LOW-NOISE LOW-DROPOUT 160MA - Rail/Tube |
| MAX8882EUT55+T | 功能描述:低壓差穩(wěn)壓器 - LDO Dual 160mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動電壓（最大值）:307 mV 輸出電流:1 A 負載調節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8882EUT55-T | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8882EUTA5 | 制造商:Maxim Integrated Products 功能描述:DUAL LOW-NOISE LOW-DROPOUT 160MA - Rail/Tube |
| MAX8882EUTA5+ | 制造商:Maxim Integrated Products 功能描述:REG LDO LIN FIX POS 3.3V/1.8V 0.16A 6PIN SOT-23 - Rail/Tube |
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