Fairchild Semiconductor FAN5336 1.5MHz TinyBoost™ Regulator with 33V Integrated FET Switch User's Manual
Summary
The FAN5336 is a highly efficient, low-noise DC-DC boost regulator engineered for reliable LED backlight and display bias power supplies. Featuring a fast 1.5MHz switching frequency and robust protections like over-voltage cutoff and thermal shutdown, it delivers stable voltage output (up to 33V). This manual provides complete technical details on performance characteristics, recommended operating conditions, available package types, and application guidelines, making it the perfect component for mobile smartphones, PDAs, portable medical equipment, and various consumer display products.
Page 1 Text Content
FA 5336 — 1.5M z Tiny B oost™ egulator w ith 33V Integrated FET Sw itch
April 2009
FAN5336 1.5MHz Tiny Boost™ Regulator with 33V Integrated FET Switch Features Description 1.5MHz Switching Frequency The FAN5336 is a high-efficiency, low-noise, fixed-fre-
Low Noise quency PWM, current-mode, DC-DC boost regulator. It is designed for small LCD bias supply and white LED
Adjustable Output Voltage
backlight supply applications. Depending on the applica-
Up to 1.5A Peak Switch Current
tion, a FAN5336 regulator can output up to 33V at up to
Low Shutdown Current: <1µA
50m A output current. With output voltage up to 21V, the
Cycle-by-Cycle Current Limit output current can be up to 100m A. FAN5336 can be
Over-Voltage Protection at the Feedback Pin used for power conversion as low as 9V output voltage.
Fixed-Frequency PWM Operation A current-mode control loop has a fast transient Soft-Start Capability response that provides excellent load regulation within
Internal Compensation 0.2% of output voltage. The FAN5336 switches at fixed 1.5MHz frequency, allowing the use of small, low-cost
Thermal Shutdown
external components. Constant frequency switching
Excellent Load Regulation: 0.2%
results in low input noise and small output capacitors.
Low Ripple
FAN5336 provides cycle-by-cycle current limiting up to
6-Lead 3x3mm MLP 1.5A peak current.
The FAN5336 may be used to drive a serial flash LED
Applications
with up to 100m A current at 21V for a maximum of Portable Displays 400ms on-time and 10% duty cycle.
Mobile Phone / Smart Phone LED Backlights A low-EMI mode reduces interference and radiated elec- Display Bias tromagnetic energy caused by the ringing of the inductor. PDA, DVD, Camcorder Backlights
Additional features include thermal shutdown, over-volt-
Pager and Cordless Phone Displays age protection, cycle-by-cycle current limit, low ripple,
Portable Medical Diagnostic Equipment and soft-start support.
Remote Controls The device is available in a 3x3mm 6-lead MLP, 0.8mm MP3 or PMP or DSC Players thickness package. Serial Flash LED Drivers
Application Diagram
VOUT VIN
CIN 6.8µH COUT
CF 4.7µF
IN 180p F
P1 NCGND
SHDN FB
Figure 1. Typical Application Diagram
© 2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5336 Rev. 1.0.2
Page Summary Contents For Fairchild Semiconductor FAN5336 1.5MHz TinyBoost™ Regulator with 33V Integrated FET Switch User's Manual
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 10 |
| File Size | 735.01 KB |
| Published | June 18, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What is the required input voltage range for safe operation?
The recommended operating conditions specify an input voltage range between 2.7V and 5.5V.
How can I control the activation state of the regulator?
The SHDN (Shutdown Control Pin, Pin 3) must be logic HIGH to enable the device and logic LOW to disable it.
What external component is required for loop stability?
For optimal stability, the recommended load capacitance is 10 µF.
Does the regulator offer protection against voltage spikes?
Yes, the FAN5336 includes built-in Over-Voltage Protection (OVP) on the Feedback Pin.