AME8890TEEV AME, AME8890TEEV Datasheet - Page 7

• Manufacturer Part Number: AME8890TEEV
• Description: Low Dropout (LDO) Regulators 1.2 V 150mA CMOS
• Manufacturer: AME

Specifications of AME8890TEEV

• Input Voltage Max: 6 V
• Dropout Voltage (max): 1300 V
• Output Current: 150 mA
• Mounting Style: SMD/SMT
• Package / Case: SOT-25
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AME8890
n Detailed Description
n External Capacitors
Rev.F.03
PMOS pass transistor, voltage reference, error amplifier,
over-current protection, thermal shutdown, and power
good function.
error amplifier, over-current shutdown, and thermal pro-
tection circuits. During normal operation, the error ampli-
fier compares the output voltage to a precision reference.
Over-current and Thermal shutdown circuits become ac-
tive when the junction temperature exceeds 150
the current exceeds 300mA. During thermal shutdown,
the output voltage remains low. Normal operation is re-
stored when the junction temperature drops below 120
mode when the load exceeds the rated output current.
This prevents over-stress. The AME8890 also incorpo-
rates current foldback to reduce power dissipation when
the output is short circuited. This feature becomes active
when the output drops below 0.8volts, and reduces the
current flow by 65%. Full current is restored when the
voltage exceeds 0.8 volts.
ground of 2.2 F or greater. Ceramic capacitors have the
lowest ESR, and will offer the best AC performance. Con-
versely, Aluminum Electrolytic capacitors exhibit the high-
est ESR, resulting in the poorest AC response. Unfortu-
nately, large value ceramic capacitors are comparatively
expensive. One option is to parallel a 0.1 F ceramic ca-
pacitor with a 10 F Aluminum Electrolytic. The benefit is
low ESR, high capacitance, and low overall cost.
put and ground to stabilize Vin. The input capacitor should
be at least 0.1 F to have a beneficial effect.
the pins. A "Quiet" ground termination is desirable. This
can be achieved with a "Star" connection.
The AME8890 family of CMOS regulators contain a
The P-channel pass transistor receives data from the
The AME8890 switches from voltage mode to current
The AME8890 is stable with an output capacitor to
A second capacitor is recommended between the in-
All capacitors should be placed in close proximity to
AME
o
C, or
o
C.
n Enable
pulled low, the PMOS pass transistor shuts off, and all
internal circuits are powered down. In this state, the qui-
escent current is less than 1 A. This pin behaves much
like an electronic switch.
n Power Good
the output is not within +15% of the specified voltage, it
pulls low. This can occur under the following conditions:
The Enable pin normally floats high. When actively,
The AME8890 includes the Power Good feature. When
1) Input Voltage too low.
2) During Over-Temperature.
3) During Over-Current.
4) If output is pulled up.
(Note: PG pin is an open-drain output.)
150mA CMOS LDO
7