MP1518

Features:

• On Board Power MOSFET
• Drives up to 6 Series White LEDs
• Up to 87% Efficiency
• Over 1MHz Fixed Switching Frequency
• Open Load Shutdown
• Low 104mV Feedback Voltage
• Soft-Start/PWM Dimming
• UVLO, Thermal Shutdown
• Internal Current Limit
• Available in TSOT23-6 and QFN8 Packages




Application

• Cell Phones
• Handheld Computers and PDAs
• Digital Still Cameras
• Small LCD Displays




Pinout








Specifications

SW , OV Pins............................................0.5V to +28V
All Other Pins..........................................0.3V to +6.5V
Storage Temperature........................ 55°C to +150°C
Recommended Operating Conditions (2)
IN Supply Voltage ..........................................2.5V to 6V
Output Voltage..............................................VIN to 25V
Operating Temperature....................... 40°C to +85°C
Thermal Resistance (3) JA JC
TSOT23-6........................................... 220.... 110.. °C/W
QFN8 (2mm x 2mm)............................ 80...... 16... °C/W
Notes:
1) Exceeding these ratings may damage the device.
2) The device is not guaranteed to function outside of its
operating conditions.
3) Measured on approximately 1" square of 1 oz copper.




Description

The MP1518 is a step-up converter designed for driving up to 6 series white LEDs from a single cell Lithium Ion battery. The MP1518 uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 104mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over-voltage condition is present due to an open circuit condition.The MP1518 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload.It is available in small 6-pin TSOT23 or 8-pin QFN (2mm x 2mm) packages.Also available is the MP1518DJE, ideal for applications where low EMI is critical.

The MP1518 is a step-up converter designed for driving up to 6 series white LEDs from a single cell Lithium Ion battery. The MP1518 uses current mode, fixed frequency architecture to regulate the LED current, which is measured through an external current sense resistor. Its low 104mV feedback voltage reduces power loss and improves efficiency. The OV pin monitors the output voltage and turns off the converter if an over-voltage condition is present due to an open circuit condition.

The MP1518 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload.

The MP1518 is available in small 6-pin TSOT23 or 8-pin QFN (2mm x 2mm) packages. Also available is the MP1518DJE, ideal for applications where low EMI is critical.

The MP1518 is designed as one kind of fixed frequency white LED driver which driving up to 6 series white LEDs from a single cell Lithium Ion battery.It uses current mode,fixed frequency architecture to regulate the LED current,which is measured through an external current sense resistor.Its low 104mV feedback voltage reduces power loss and improves efficiency.The MP1518 includes under-voltage lockout,current limiting and thermal overload protection preventing damage in the event of an output overload.

Features of the MP1518 are:(1)on board power MOSFET;(2)drives up to 6 series white LEDs;(3)up to 87% efficiency;(4)over 1MHz fixed switching frequency;(5)open load shutdown;(6)low 104mV feedback voltage;(7)soft-start/PWM dimming;(8)UVLO,thermal shutdown;(9)internal current limit;(10)available in TSOT23-6 and QFN8 packages.It can be used in small LCD displays,digital still cameras,handheld computers and PDAs,cell phones.

The absolute maximum ratings of the MP1518 can be summarized as:(1)SW,OV pins:-0.5V to +28V;(2)all other pins:-0.3V to +6.5V;(3)storage temperature:-55°C to +150°C;(4)in supply voltage:2.5V to 6V;(5)output voltage:Vin to 25V;(6)operating temperature:-40°C to +85°C.If you want to know more information such as the electrical characteristics about the MP1518,please download the datasheet in www.seekic.com or www.chinaicmart.com .