MIC5239BM Micrel Inc, MIC5239BM Datasheet - Page 12

• Manufacturer Part Number: MIC5239BM
• Description: IC REG LDO 500MA ADJ 8-SOIC
• Manufacturer: Micrel Inc

Specifications of MIC5239BM

• Regulator Topology: Positive Adjustable
• Voltage - Output: 1.24 ~ 20 V
• Voltage - Input: 2.3 ~ 30 V
• Voltage - Dropout (typical): 0.35V @ 500mA
• Number Of Regulators: 1
• Current - Output: 500mA
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Primary Input Voltage: 30V
• Output Voltage Adjustable Range: 1.24V To 20V
• Dropout Voltage Vdo: 350mV
• No. Of Pins: 8
• Output Current: 500mA
• Operating Temperature Range: -40°C To +125°C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Limit (min): -
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant

Adjustable Regulator Application
Micrel
December 2007
Figure 10. Adjustable Voltage Application
12
The MIC5239YM can be adjusted from 1.24V to 20V by
using two external resistors (Figure 10). The resistors
set the output voltage based on the following equation:
Feedback resistor R2 should be no larger than 300kΩ.
Where V
V
OUT
=
V
REF
REF
= 1.23V.
⎛
⎜
⎝
1
+
R2
R1
⎞
⎟
⎠
M9999-121007
MIC5239