MIC5248-1.2YM5 TR Micrel Inc, MIC5248-1.2YM5 TR Datasheet - Page 8

• Manufacturer Part Number: MIC5248-1.2YM5 TR
• Description: IC REG LDO 150MA 1.2V SOT23-5
• Manufacturer: Micrel Inc

Specifications of MIC5248-1.2YM5 TR

• Regulator Topology: Positive Fixed
• Voltage - Output: 1.2V
• Voltage - Input: 2.7 ~ 6 V
• Number Of Regulators: 1
• Current - Output: 150mA
• Current - Limit (min): 160mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Dropout (typical): -
• Other names: 576-2798-2; MIC5248-1.2YM5 TR; MIC5248-1.2YM5TR; MIC5248-1.2YM5TR

The junction-to-ambient thermal resistance for the
minimum footprint is 235°C/W, from Table 1. The
maximum power dissipation must not be exceeded for
proper operation. Using the output voltage of 1.2V and
an output current of 150mA, the maximum input voltage
can be determined. 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.
Micrel, Inc.
August 2006
P
315mW = (V
315mW = V
510mW = V
V
D(max)
IN(max)
= 315mW
= 3.4V
IN
IN
IN
× 150mA – 195mW
× 150mA
– 1.2V) 150mA
8
Therefore, a 1.2V application at 150mA of output current
can accept a maximum input voltage of 3.4V in a SOT-
23-5package. For a full 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.
Dual-Supply Operation
When used in dual supply systems where the regulator
load is returned to a negative supply, the output voltage
must be diode clamped to ground.
M9999-080106
MIC5248