Features: · 2.4V to 16V input voltage
· Output adjustable to 16V
· Programmable peak current limit
· Soft start
· Up to 450kHz switching frequency
· 0.5?A shutdown current
· 200?A quiescent current
·Capable of 5V/ 500mA output with 3.3V input
· Achieves over 85% efficiency
· Implements low power BOOST, SEPIC, and FLYBACK topologies
· MSOP-8 and 3mm?3mm MLF?-10LApplication· Flash LED driver
· LCD bias supply
· White LED driver
· DSL bias supply
·Local 3V to 5V conversionPinout
SpecificationsSupply Voltage (VDD)..................................................18V
Switch Voltage (VSW).................................................18V
Feedback Voltage (VFB)..............................................18V
Switch Current (ISW)....................................................2A
Enable Voltage(VEN), Note 5......................................18V
RSET Voltage (VRSET)...................................................6V
ESD Rating, Note 3.....................................................2kV
Ambient Storage Temperature(TS).....(R)65?C to +150?C
DescriptionThe MIC2145 is a small size boost switching regulator that can provide over 2.5W of output power. The input voltage range is between 2.4V to 16V, making the device suitable for one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applications. The output voltage of the MIC2145 can be adjusted up to 16V.
The MIC2145 is well suited for portable, space-sensitive applications. Its typical 450kHz operation allows small surface mount external components to be used. The MIC2145 has a low quiescent current of 200µA, and a typical shutdown current of 0.5µA. The MIC2145 is capable of high efficiencies in a small board area.
The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak switch current can be programmed through an external resistor. This allows the user to set the peak switch current at the level where maximum efficiency occurs.MIC2145 also allows the user to further optimize for efficiency and inductor size by setting the peak current below the level of inductor saturation.
The MIC2145 is available in an MSOP-8 and 3mmx3mm MLF™-10L package with an ambient operating temperature range from 40°C to +85°C.
The MIC2145 is a small size boost switching regulator that can provide over 2.5W of output power. The input voltage
range is between 2.4V to 16V, making the device suitable for one-cell Li-Ion and 3- to 4-cell alkaline/NiCad/NiMH applica- tions. The output voltage of the MIC2145 can be adjusted up to 16V.
The MIC2145 is well suited for portable, space-sensitive applications. Its typical 450kHz operation allows small sur- face mount external components to be used. It has a low quiescent current of 200?A, and a typical shutdown current of 0.5?A. The MIC2145 is capable of high efficiencies in a small board area.
The MIC2145 features a low-on resistance internal switch that allows it to provide over 2.5W of output power. The peak switch current can be programmed through an external resistor. MIC2145 allows the user to set the peak switch current at the level where maximum efficiency occurs. MIC2145 also allows the user to further optimize for efficiency and inductor size by setting the peak current below the level of inductor saturation.
The MIC2145 is available in an MSOP-8 and 3mm?3mm MLF?-10L package with an ambient operating temperature range from (R)C4?C to +85?C.
MIC2145 Data Sheet
