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onsemi FAN5336MPX
- Part No.:
- FAN5336MPX
- Manufacturer:
- onsemi
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
FAN5336MPX.pdf
- Description:
- IC REG BOOST ADJ 1.1A 6MLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,444
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Product details
Overview
FAN5336MPX from Fairchild Semiconductor is a 1.5MHz current-mode PWM boost regulator with integrated 33V FET switch, adjustable output (9–33V), ±3% output voltage accuracy, and 1.5A peak switch current capability. It delivers up to 100mA at 21V for LED backlighting in portable displays and mobile phones.
For engineers reviewing the FAN5336MPX datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed load regulation (0.2%), thermal shutdown behavior, and real-world design constraints including 6.8µH inductor requirement and 4.7µF output capacitor stability condition.
Technical Context
The FAN5336MPX implements fixed-frequency (1.15–1.85MHz) current-mode control with internal 30mΩ sense resistor, enabling fast transient response and 0.2% load regulation. Its architecture integrates soft-start (≤5ms to 95% VOUT), cycle-by-cycle current limiting, and over-voltage protection at the FB pin.
It operates from 2.7–5.5V input, supports output voltages from 9V to 33V via external resistor divider, and requires a 180pF feedforward capacitor for loop stability. The device enters thermal shutdown at 150°C and restarts at 130°C, with <1µA shutdown current and 0.4Ω typical switch on-resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.5MHz nominal; enables use of compact 6.8µH inductor and low-ESR ceramic capacitors. |
| Output Voltage Range | 9–33V adjustable; set by external R1/R2 divider referencing 1.23V internal bandgap. |
| Peak Switch Current | 1.5A max; limits inductor saturation risk and defines maximum flash LED drive capability (100mA @ 21V, 10% duty). |
| Load Regulation | 0.2% over 1–100mA load; ensures stable bias voltage for white LED strings under varying current demand. |
| Shutdown Current | <1µA; preserves battery life in portable devices during display-off or standby modes. |
| Feedback Voltage | 1.230V ±0.025V; determines output accuracy and sets minimum R2 value for noise immunity. |
| Thermal Shutdown | 150°C trip / 130°C recovery; protects die during sustained high-power operation without external thermal management. |
Pinout & Package
Package: 6-lead 3×3mm MLP (Molded Leadless Package), 0.8mm thickness, RoHS-compliant "Green" eco status, tape-and-reel packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 / Pin 2 | GND | Analog and power ground reference; must be soldered directly to PCB ground plane for EMI control and thermal dissipation. |
| Pin 1 | VIN | Main input supply (2.7–5.5V); connects to 10µF low-ESR ceramic capacitor placed adjacent to pin. |
| Pin 3 | SHDN | Active-high enable; logic HIGH ≥1.5V enables regulation; logic LOW ≤0.5V disables with <1µA quiescent draw. |
| Pin 4 | FB | Feedback node; senses divided output voltage; internal 1.23V reference sets VOUT = 1.23 × (1 + R1/R2). |
| Pin 5 | NC | No connect; must remain unconnected and unbonded per datasheet specification. |
| Pin 6 | SW | Switching node; connects to inductor and Schottky diode anode; carries high dv/dt and peak currents up to 1.5A. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Compensation | Eliminates need for external compensation network; simplifies layout and reduces BOM count for space-constrained portable designs. |
| Low-Ripple Operation | Fixed 1.5MHz frequency + internal soft-start minimizes output ripple and input noise; enables use of 4.7µF output capacitor at 33V. |
| Cycle-by-Cycle Current Limit | Protects switch and inductor during startup or overload; resets each clock cycle to maintain regulation without latch-up. |
| Over-Voltage Protection at FB | Fast comparator clamps duty cycle if feedback voltage exceeds 1.15×VREF; prevents runaway output during open-feedback faults. |
| Low-EMI Mode | Reduces inductor ringing energy; lowers radiated emissions without requiring external snubbers or ferrite beads. |
Applications
| Portable Display Bias | Smartphone LED Backlight |
|---|---|
|
Use Scenario: Powering TFT-LCD gate drivers requiring stable 12–18V bias rails in handheld medical diagnostic equipment. IC Role / Device Role / Timing Role: High-efficiency DC-DC boost converter generating regulated bias voltage from single-cell Li-ion (3.6V nominal). Use Value: Delivers 125mA at 12V with 0.2% load regulation, eliminating need for discrete charge pumps or transformer-based solutions. |
Use Scenario: Driving white LED strings in smartphone front-facing displays with dynamic brightness control. IC Role / Device Role / Timing Role: Adjustable-output boost regulator supplying constant-current LED driver ICs (e.g., CAT4137) with 21V rail. Use Value: Supports 100mA output at 21V for ≤400ms bursts, meeting flash LED timing requirements while maintaining <1µA shutdown current. |
| PDA/Camcorder Backlight | Remote Control Display Supply |
|
Use Scenario: Providing 9V bias for monochrome STN LCDs in legacy PDAs and camcorders powered by alkaline batteries (2.7–4.7V range). IC Role / Device Role / Timing Role: Low-noise boost converter operating across wide input range with minimal input capacitance (10µF). Use Value: Achieves >85% efficiency at 50mA load with 2.7V input, extending battery runtime without audible switching noise. |
Use Scenario: Generating 33V supply for vacuum fluorescent displays (VFDs) in automotive remote controls and industrial handsets. IC Role / Device Role / Timing Role: High-voltage boost regulator delivering precise 33V output using 258kΩ/10kΩ resistor divider. Use Value: Maintains ±3% output accuracy over -40°C to +85°C ambient, ensuring consistent VFD brightness across temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | 2.5MHz switching frequency; 28V max output; 0.5A peak switch current; requires external compensation. | Higher frequency allows smaller inductors but lower output voltage and current limit restrict use in 33V/100mA LED flash applications. | Select TPS61040DRVR only when board space is critical and output voltage ≤28V suffices. |
| MAX17062ETA+ | 1.2MHz frequency; 36V max output; 2A peak switch current; integrated Schottky diode; no NC pin. | Higher current capability and integrated diode simplify layout but larger 20-pin TQFN package increases footprint vs. FAN5336MPX's 3×3mm MLP. | Choose MAX17062ETA+ when higher output current (>100mA) or diode integration is required despite larger size. |
Compared with TPS61040DRVR and MAX17062ETA+, the FAN5336MPX offers optimal balance of 33V capability, 1.5A peak current, ultra-compact 3×3mm MLP, and internal compensation-making it uniquely suited for space-constrained portable LED bias and flash applications where 21–33V output and burst-mode timing are essential.
Availability
FAN5336MPX is available at Aetrix Electronics and suitable for portable display bias, smartphone LED backlighting, and remote control VFD supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for FAN5336MPX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Fairchild Semiconductor (now part of ON Semiconductor) is a U.S.-based analog and power IC manufacturer specializing in high-efficiency, low-noise power management solutions for portable electronics.
The FAN5336MPX belongs to Fairchild's TinyBoost™ family of compact boost regulators designed specifically for LCD bias and white LED backlighting in battery-powered consumer devices.
FAQ
What is the maximum output voltage supported by the FAN5336MPX?
The FAN5336MPX supports a maximum output voltage of 33V, achieved using an external resistor divider network connected to the FB pin. This rating is validated under recommended operating conditions (VIN = 4.0–5.5V) and requires proper selection of output capacitor voltage rating and external Schottky diode reverse voltage rating. The 33V capability enables direct use in vacuum fluorescent display (VFD) bias and high-voltage LED string applications without cascaded converters.
Does the FAN5336MPX require external compensation components?
No, the FAN5336MPX features internal compensation, eliminating the need for external RC networks or type-II/III compensators. This simplifies PCB layout, reduces BOM cost, and improves design reliability-especially in space-constrained portable applications. Stability is ensured with the specified 180pF feedforward capacitor (CF) and 4.7µF output capacitor, both placed close to the IC pins per layout guidelines.
What is the purpose of the NC pin on the FAN5336MPX?
Pin 5 of the FAN5336MPX is designated NC (No Connect) and must remain unconnected and unbonded on the PCB. It is not internally tied to any circuit node and serves no functional role. Connecting or routing to this pin may compromise device performance or reliability. The datasheet explicitly states that NC must be left floating-no pull-up, pull-down, or trace routing is permitted.
Can the FAN5336MPX drive flash LEDs, and what are the timing constraints?
Yes, the FAN5336MPX is qualified to drive serial flash LEDs at up to 100mA and 21V for durations ≤400ms with a maximum 10% duty cycle. This capability is enabled by its 1.5A peak switch current limit and thermal design margin. Exceeding these limits risks triggering thermal shutdown or violating safe operating area (SOA) boundaries. The device does not include dedicated flash timing control logic-the external system controller must enforce timing compliance.
How does the FAN5336MPX achieve low EMI in portable designs?
The FAN5336MPX incorporates a low-EMI mode that suppresses inductor ringing energy, reducing radiated electromagnetic interference without external snubbers. Combined with its fixed 1.5MHz switching frequency-which places noise above sensitive audio bands-and requirement for tight placement of 10µF CIN and 4.7µF COUT near the IC, it meets Class B emission limits in handheld layouts. PCB layout recommendations (ground plane, short SW traces, separation from FB divider) are essential to realize this benefit.
FAN5336MPX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBoost®
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 9V
- Voltage - Output (Max):
- 33V
- Current - Output:
- 1.1A (Switch)
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-MLP (3x3)
FAN5336MPX FAQ
1.How can I place an order for FAN5336MPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN5336MPX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for FAN5336MPX reliable?
The price and inventory of FAN5336MPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN5336MPX is usually 5 days.
3.What payment methods are accepted for FAN5336MPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN5336MPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN5336MPX?
FAN5336MPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN5336MPX order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for FAN5336MPX?
For technical support, including FAN5336MPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN5336MPX requirements.
6.How does Aetrix verify that FAN5336MPX is sourced from the original manufacturer or authorized distributors?
All FAN5336MPX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that FAN5336MPX meets industry standards.
7.What is the process for return or replacement of FAN5336MPX?
All FAN5336MPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN5336MPX, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The FAN5336MPX part is unused and in its original packaging.
Return procedure for FAN5336MPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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