Features: • 1.5A minimum guaranteed output current
• 500mV maximum dropout voltage over temperature
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5 to 1.8V conversion
• 1% initial accuracy
• Low ground current
• Current limiting and Thermal shutdown
• Reversed-battery and reversed lead insertion protection
• Reversed-leakage protection
• Fast transient response
• TO-263 and TO-220 packaging
• TTL/CMOS compatible enable pin (MIC39151 only)
• Error flag output (MIC39151 only)
Application• Low-voltage digital ICs
• LDO linear regulator for PC add-in cards
• High-efficiency linear power supplies
• SMPS post regulator
• Low-voltage microcontrollers
• StrongARM™ processor supplyPinout
SpecificationsSupply Voltage (VIN) ............................................. 20V to +20V
Enable Voltage (VEN) .......................................................... .+20V
Storage Temperature (TS) ................................ ..65to +150
Lead Temperature (soldering, 5 sec.) ................................. 260
DescriptionThe MIC39150 and MIC39151 are 1.5A low-dropout linear voltage regulators that provide a low voltage, high current output with a minimum of external components. Utilizing Micrel's proprietary Super eta PNP™ pass element, the MIC39150/1 offers extremely low dropout (typically 375mV at 1.5A) and low ground current (typically 17mA at 1.5A).
The MIC39150/1 is ideal for PC add-in cards that need to convert from 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed maximum dropout voltage of 500mV over all operating conditions allows the MIC39150/1 to provide 2.5V from a supply as low as 3V or 1.8V from a supply as low as 2.3V. The MIC39150/1 also has fast transient response for heavy switching applications. This device requires only 10F of output capacitance to maintain stability and achieve fast transient response
The MIC39150/1 is fully protected with overcurrent limiting, thermal shutdown, reversed-battery protection, reversedlead insertion, and reverse-leakage protection. The MIC39151
offers a TTL-logic compatible enable pin and an error flag that indicates undervoltage and over current conditions. Offered in fixed voltages of 2.5V and 1.8V, the MIC39150/1 comes in the TO-220 and TO-263 packages and is an ideal upgrade to older, NPN-based linear voltage regulators.
For applications requiring input voltage greater than 16V or automotive load dump protection, see the MIC29150/1/2/3 family.
MIC39151 Data Sheet
