AP7217D-12YG-13 Diodes Inc, AP7217D-12YG-13 Datasheet - Page 7

• Manufacturer Part Number: AP7217D-12YG-13
• Description: IC REG LDO 1.2V 600MA SOT89-3
• Manufacturer: Diodes Inc

Specifications of AP7217D-12YG-13

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.2V
• Voltage - Input: 2.5 ~ 5.5 V
• Voltage - Dropout (typical): 0.85V @ 600mA
• Number Of Regulators: 1
• Current - Output: 600mA (Max)
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SC-62, SOT-89, TO-243 (3 Leads + Tab)
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 5.5 V
• Output Voltage: 1.2 V
• Output Type: Fixed
• Dropout Voltage (max): 1.3 V at 600 mA
• Output Current: 600 mA
• Line Regulation: 0.2 % / V
• Load Regulation: 55 mV
• Maximum Power Dissipation: 0.578 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: AP7217D-12YGDITR

Application Information
Input Capacitor
A 1μF ceramic capacitor is recommended to connect between IN
and GND pins to decouple input power supply glitch and noise.
The amount of the capacitance may be increased without limit.
A lower ESR (Equivalent Series Resistance) capacitor allows the
use of less capacitance, while higher ESR type requires more
capacitance. This input capacitor must be located as close as
possible to the device to assure input stability and less noise. For
PCB layout, a wide copper trace is required for both IN and GND.
Output Capacitor
The output capacitor is required to stabilize and help the transient
response of the LDO. The AP7217D is designed to have
excellent transient response for most applications with a small
amount of output capacitance. The AP7217D is stable with any
small ceramic output capacitors of 1.0μF or higher value, and the
temperature coefficients of X7R or X5R type.
capacitance helps to reduce undershoot and overshoot during
transient. For PCB layout, the output capacitor must be placed as
close as possible to OUT and GND pins, and keep the leads as
short as possible.
Thermal Considerations
Thermal Shutdown Protection limits power dissipation in
AP7217D. When the operation junction temperature exceeds
150°C, the Over Temperature Protection circuit starts the thermal
shutdown function and turns the pass element off. The pass
element turn on again after the junction temperature cools by
30°C. For continuous operation, do not exceed recommend
maximum operation junction temperature 125°C. The power
dissipation definition in device is:
P
AP7217D Rev. 2
D
= (V
IN
− V
OUT
) x I
OUT
+ V
IN
x I
Q
www.diodes.com
Additional
7 of 9
The maximum power dissipation depends on the thermal
resistance of IC package, PCB layout, the rate of surroundings
airflow and temperature difference between junctions to ambient.
The maximum power dissipation can be calculated by following
formula:
P
Where T
125°C, T
to ambient thermal resistance.
Current Limit Protection
When output current at OUT pin is higher than current limit
threshold, the current limit protection will be triggered and clamp
the output current to approximately 850mA to prevent
over-current and to protect the regulator from damage due to
overheating.
Short circuit protection
When V
200mV, short circuit protection will be triggered and clamp the
output current to approximately 200mA.
D(MAX)
V
IN
OUT
A
= ( T
J(MAX)
is the ambient temperature and the θ
pin is shorted to GND or V
C
I
J(MAX)
is the maximum operation junction temperature
IN
IN
- TA ) / θ
1.2V 600mA CMOS LDO
IN
AP7217D
GND
JA
Iq
OUT
AP7217D
OUT
©
FEBRUARY 2009
voltage is less than
Diodes Incorporated
JA
is the junction
I
OUT
ESR
C
OUT
V
OUT