AME8805AEFT AME, AME8805AEFT Datasheet - Page 7

• Manufacturer Part Number: AME8805AEFT
• Description: Low Dropout (LDO) Regulators 3.3V 600mA CMOS
• Manufacturer: AME

Specifications of AME8805AEFT

• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 7 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 0.6 V at 600 mA
• Output Current: 0.6 A
• Line Regulation: 0.1 %
• Load Regulation: 1 %
• Voltage Regulation Accuracy: 1.5 %
• Maximum Power Dissipation: 550 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SOT-89
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AME8805 / 8810
n n n n n
The AME8805/8810 family of CMOS regulators con-
tain a PMOS pass transistor, voltage reference, error
amplifier, over-current protection, and thermal shut-
down.
The P-channel pass transistor receives data from the
error amplifier, over-current shutdown, and thermal pro-
tection circuits. During normal operation, the error am-
plifier compares the output voltage to a precision refer-
ence. Over-current and Thermal shutdown circuits be-
come active when the junction temperature exceeds
150
shutdown, the output voltage remains low. Normal op-
eration is restored when the junction temperature drops
below 120
The AME8805/8810 switches from voltage mode to cur-
rent mode when the load exceeds the rated output cur-
rent. This prevents over-stress. The AME8805/8810
also incorporates current foldback to reduce power dis-
sipation when the output is short circuited. This feature
becomes active when the output drops below 0.8 volts,
and reduces the current flow by 65%. Full current is
restored when the voltage exceeds 0.8 volts.
o
Detailed Description
C, or the current exceeds 600mA. During thermal
o
C.
Analog Microelectronics, Inc.
n n n n n
The AME8805/8810 is stable with an output capacitor
to ground of 2.2 F or greater. Ceramic capacitors have
the lowest ESR, and will offer the best AC performance.
Conversely, Aluminum Electrolytic capacitors exhibit the
highest ESR, resulting in the poorest AC response. Un-
fortunately, large value ceramic capacitors are compara-
tively expensive. One option is to parallel a 0.1 F ce-
ramic capacitor with a 10 F Aluminum Electrolytic. The
benefit is low ESR, high capacitance, and low overall
cost.
A second capacitor is recommended between the input
and ground to stabilize Vin. The input capacitor should
be at least 0.1 F to have a beneficial effect.
All capacitors should be placed in close proximity to
the pins. A "Quiet" ground termination is desirable.
This can be achieved with a "Star" connection.
External Capacitors
600mA CMOS LDO
7