MAX8881EUT33-T Maxim Integrated Products, MAX8881EUT33-T Datasheet - Page 6

• Manufacturer Part Number: MAX8881EUT33-T
• Description: Low Dropout (LDO) Regulators 12V Linear Regulator
• Manufacturer: Maxim Integrated Products

Specifications of MAX8881EUT33-T

• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 12 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 0.2 V at 50 mA
• Output Current: 200 mA
• Line Regulation: 0.05 % / V
• Load Regulation: 0.02 % / mA
• Voltage Regulation Accuracy: 1.5 %
• Maximum Power Dissipation: 0.696 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-23
• Minimum Operating Temperature: - 40 C

The MAX8880/MAX8881 have a unique protection
scheme that limits the reverse supply current to less
than 1mA when V
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 100kΩ resistor.
12V, Ultra-Low-I
Linear Regulators with POK
Figure 2. Functional Diagram
Figure 3. Adjustable Output Using External Feedback Resistors
6
2.5V TO 12V
_______________________________________________________________________________________
V
1μF
IN
C1
SHDN
GND
IN
IN
SHDN
MAX8881
PROTECTION
IN
MAX8880
REVERSE
BATTERY
Reverse Battery Protection
is forced below ground. The circuit
GND
OUT
POK
FB
REGULATION OK
SHUTDOWN
THERMAL
SENSOR
LOGIC
C2
4.7μF
Q
, Low-Dropout
1.25V TO 5.5V
R3
R4
UP TO 200mA
1.25V
V
REF
OUT
91%
REF
ERROR
AMP
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 limits total power dissipa-
tion in the MAX8880/MAX8881. When the internal junc-
tion temperature exceeds T
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
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
V
OUT
Operating Region and Power Dissipation
POK
). The maximum power dissipation allowed is:
MOS DRIVER
WITH I
LIMIT
Thermal Overload Protection
J
= +160°C, the thermal
Current Limiting
P
J(MAX)
OUT
FB
POK
= +150°C.
OUT
(V
IN
-