FAN5336

FAN5336 -- 1.5MHz Boost Regulator with 33V Integrated FET Switch

Datasheet preview, take a look at Datasheets before downloading (Data Sheet is available on manufacturer site)

FAN5336 -- 1.5MHz Boost Regulator with 33V Integrated FET Switch

April 2007

FAN5336
1.5MHz Boost Regulator with 33V Integrated FET Switch
Features
1.5MHz Switching Frequency Low Noise Adjustable Output Voltage Up to 1.5A Peak Switch Current Low Shutdown Current: 1 A Cycle-by-Cycle Current Limit Over-Voltage Protection at the Feedback Pin Fixed-Frequency PWM Operation Soft-Start Capability Internal Compensation Thermal Shutdown Excellent Load Regulation: 0.2% Low Ripple 6-Lead 3x3mm MLP

Description
The FAN5336 is a high-efficiency, low-noise, fixed-frequency PWM, current-mode, DC-DC boost regulator. It is designed for small LCD bias supply and white LED backlight supply applications. Depending on the application, a FAN5336 regulator can output up to 33V at up to 50mA output current. With output voltage up to 21V, the output current can be up to 100mA. FAN5336 can be used for power conversion as low as 9V output voltage. A current-mode control loop has a fast transient response that provides excellent load regulation within 0.2% of output voltage. The FAN5336 switches at fixed 1.5MHz frequency, allowing the use of small, low-cost external components. Constant frequency switching results in low input noise and small output capacitors. FAN5336 provides cycle-by-cycle current limiting up to 1.5A peak current. The FAN5336 may be used to drive a serial flash LED with up to 100mA current at 21V for a maximum of 400ms on-time and 10% duty cycle. A low-EMI mode reduces interference and radiated electromagnetic
energy caused by the ringing of the inductor. Additional features include thermal shutdown, over-voltage protection, cycle-by-cycle current limit, low ripple, and soft-start support. The device is available in a 3x3mm 6-lead MLP, 0.8mm thickness package.

Applications
Portable Displays Mobile Phone / Smart Phone LED Backlights Display Bias PDA, DVD, Camcorder Backlights Pager and Cordless Phone Displays Portable Medical Diagnostic Equipment Remote Controls MP3 or PMP or DSC Players Serial Flash LED Drivers

Application Diagram
VIN CIN 10 F 1 V 2 L1 6.8 H SW 6 NC 5 CF R1 180pF D1 VOUT COUT 4.7 F

GND

ON OFF

SHDN

4 R2

Figure 1. Typical Application Diagram
2004 Fairchild Semiconductor Corporation FAN5336 Rev. 1.0.1 www.fairchildsemi.com