MCP1825S-1802E/DB Microchip Technology, MCP1825S-1802E/DB Datasheet - Page 22

• Manufacturer Part Number: MCP1825S-1802E/DB
• Description: IC LDO REG 500MA 1.8V SOT223-3
• Manufacturer: Microchip Technology

Specifications of MCP1825S-1802E/DB

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.8V
• Voltage - Input: 2.1 ~ 6 V
• Voltage - Dropout (typical): 0.21V @ 500mA
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261
• Primary Input Voltage: 6V
• Output Voltage Fixed: 1.8V
• Dropout Voltage Vdo: 210mV
• No. Of Pins: 3
• Output Current: 500mA
• Operating Temperature Range: -40°C To +125°C
• Output Voltage: 1.8V
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6 V
• Output Type: Fixed
• Dropout Voltage (max): 0.35 V at 500 mA
• Line Regulation: 0.05 % / V
• Load Regulation: 0.5 %
• Voltage Regulation Accuracy: 0.5 %
• Maximum Operating Temperature: + 125 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

MCP1825/MCP1825S
5.3.1.2
To estimate the internal junction temperature, the
calculated temperature rise is added to the ambient or
offset temperature. For this example, the worst-case
junction temperature is estimated below:
5.3.1.3
From this table, you can see the difference in maximum
allowable power dissipation between the TO-220-5
package and the DDPAK-5 package.
DS22056B-page 22
TO-220-5 (29.3°C/W Rθ
DDPAK-5 (31.2°C/Watt Rθ
P
P
P
P
D(MAX)
D(MAX)
D(MAX)
D(MAX)
T
T
T
J
J
J
Junction Temperature Estimate
Maximum Package Power
Dissipation at 60°C Ambient
Temperature
= T
= 15.06°C + 60.0°C
= 75.06°C
= (125°C – 60°C) / 29.3°C/W
= 2.218W
= (125°C – 60°C)/ 31.2°C/W
= 2.083W
JRISE
+ T
JA
A(MAX)
):
JA
):
© 2008 Microchip Technology Inc.