MIC5319-1.3HYD5 TR Micrel Inc, MIC5319-1.3HYD5 TR Datasheet - Page 10

• Manufacturer Part Number: MIC5319-1.3HYD5 TR
• Description: 500mA Cap Ultra-Low Dropout, High PSRR LDO Regulator In TSOT ( )
• Manufacturer: Micrel Inc

Specifications of MIC5319-1.3HYD5 TR

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.375V
• Voltage - Input: 2.5 ~ 5.5 V
• Number Of Regulators: 1
• Current - Output: 500mA
• Current - Limit (min): 600mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 576-2863-2; MIC5319-1.3HYD5 TR; MIC5319-1.3HYD5TR; MIC5319-1.3HYD5TR

Because this device is CMOS and the ground current is
typically <100µA over the load range, the power
dissipation contributed by the ground current is <1% and
can be ignored for this calculation:
To
temperature of the package, use the junction-to-ambient
thermal resistance of the device and the following basic
equation:
T
the die. θ
Table 1 shows junction-to-ambient thermal resistance for
the MIC5319 in the 2mm x 2mm MLF
2mm × 2mm MLF
Micrel, Inc.
May 2010
J
(max) = 125°C, the maximum junction temperature of
SOT-23-5
Package
determine
P
P
P
JA
D
D
D
(max) =
= (3.3V − 2.8V) × 500mA
= 0.25W
thermal resistance = 93°C/W.
Table 1. Thermal Resistance
®
the
⎛
⎜
⎝
T
J
(max)
maximum
Minimum Footprint
θ
θ
JA
JA
Recommended
−
235°C/W
93°C/W
T
A
⎞
⎟
⎠
ambient
®
package.
operating
45°C/W
θ
JC
10
Substituting 0.25W for P
ambient operating temperature will give the maximum
operating conditions for the regulator circuit. The
maximum power dissipation must not be exceeded for
proper operation.
Therefore, a 2.8V application at 500mA of output current
can accept an ambient operating temperature of
101.75°C in a 2mm x 2mm MLF
discussion of heat sinking and thermal effects on voltage
regulators, refer to the “Regulator Thermals” section of
Micrel’s Designing with Low-Dropout Voltage Regulators
handbook. This information can be found on Micrel's
website at:
www.micrel.com/_PDF/other/LDOBk_ds.pdf
0.25W =
T
A
= 101.75°C
D
125
(max) and solving for the
93
°
°
C
C/W
−
®
T
package. For a full
A
M9999-052510
MIC5319