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onsemi FAN5336UMPX
- Part No.:
- FAN5336UMPX
- Manufacturer:
- onsemi
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
FAN5336UMPX.pdf
- Description:
- IC REG BOOST ADJ 1.1A 6UMLP
- Quantity:
- Payment:
- Shipping:
Inventory:2,851
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Product details
Overview
FAN5336UMPX from Fairchild Semiconductor is a 1.5MHz current-mode PWM boost regulator with integrated 33V FET switch, adjustable output (9–33V), 1.5A peak switch current, and 0.2% load regulation-designed for white LED backlight and LCD bias in portable displays.
For engineers reviewing the FAN5336UMPX datasheet, pinout, applications, or equivalent options, key selection criteria include its 3x3mm UMLP package, cycle-by-cycle current limiting, soft-start timing (≤5ms), low shutdown current (<1µA), and compatibility with ceramic output capacitors ≥4.7µF for stable 21V/100mA flash LED drive.
Technical Context
The FAN5336UMPX implements fixed-frequency (1.15–1.85MHz) current-mode control with internal 30mΩ sense resistor and ramp-compensated PWM comparator. Its error amplifier compares FB voltage against 1.23V reference to regulate output via duty-cycle adjustment.
Thermal shutdown activates at 150°C junction temperature and releases at 130°C; over-voltage protection clamps FB pin above 1.15×VREF; low-EMI mode suppresses inductor ringing. The device supports discontinuous conduction mode during startup or overload but maintains regulation within ±3% output accuracy across 2.7–5.5V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.5MHz typical; enables use of small 6.8µH inductor and compact 4.7µF ceramic output capacitor. |
| Output Voltage Range | 9–33V adjustable via external resistor divider; supports 21V/100mA flash LED drive with 400ms max on-time. |
| Peak Switch Current | 1.5A maximum; provides headroom for startup surge and transient loads without external current sensing. |
| Load Regulation | 0.2% over 1–100mA load range; ensures stable display bias voltage despite varying LED string current. |
| Shutdown Current | <1µA at VSHDN = 0V; minimizes battery drain in standby mode for portable medical and remote control devices. |
| Feedback Reference | 1.230V ±25mV; sets precise output scaling with R1/R2 divider-e.g., 160kΩ/10kΩ yields 21V nominal. |
| Input Voltage Range | 2.7–5.5V; matches single-cell Li-ion (3.0–4.2V) and dual-cell alkaline (2.7–3.6V) battery systems. |
Pinout & Package
Package: 6-lead 3×3mm Ultrathin Molded Leadless Package (UMLP), 0.8mm thickness, exposed thermal pad (P1/GND soldered to PCB ground).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| P1 / Pin 2 | GND | Analog and power ground reference; must be connected to low-impedance PCB ground plane for EMI control and thermal dissipation. |
| Pin 1 | VIN | Main input supply (2.7–5.5V); requires local 10µF ceramic decoupling placed adjacent to pin. |
| Pin 3 | SHDN | Active-high enable control; logic HIGH (>1.5V) enables regulator; logic LOW (<0.5V) disables with <1µA quiescent draw. |
| Pin 4 | FB | Feedback node for output voltage regulation; connects to resistor divider (R1/R2) to set VOUT = 1.23V × (1 + R1/R2). |
| Pin 5 | NC | No-connect terminal; must remain unconnected per datasheet; no internal connection or function. |
| Pin 6 | SW | Switching node connecting internal N-FET drain to external inductor and Schottky diode anode; carries high dv/dt and peak current. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Compensation | Eliminates need for external compensation network-reduces BOM count and layout sensitivity while maintaining stability with 4.7µF COUT. |
| Soft-Start | Reaches 95% of target output voltage within 5ms (VIN=2.7V, VOUT=21V, ILOAD=35mA), preventing inrush current into large output capacitors. |
| Cycle-by-Cycle Current Limit | Clamps peak switch current to ≤1.5A every switching cycle-protects internal FET during short-circuit or startup overload without latch-off. |
| Low-Ripple Operation | Fixed 1.5MHz frequency and internal ramp compensation minimize output voltage ripple (<20mVpp typical), critical for noise-sensitive display bias rails. |
| Over-Voltage Protection at FB | Fast comparator limits duty cycle if FB exceeds 1.15×VREF-prevents runaway output during feedback divider open-circuit or resistor drift. |
Applications
| Portable Display Bias | Smartphone LED Backlight |
|---|---|
|
Use Scenario: Powering TFT-LCD gate drivers requiring stable 12–18V bias rail from 3.6V Li-ion battery. IC Role / Device Role / Timing Role: Fixed-frequency boost regulator generating regulated positive bias voltage with 0.2% load regulation. Use Value: Enables compact, low-noise bias supply using only 6.8µH inductor and 4.7µF ceramic capacitor-no external compensation needed. |
Use Scenario: Driving white LED strings in smartphone front-facing displays with dynamic brightness control. IC Role / Device Role / Timing Role: Adjustable-output boost converter delivering up to 21V/100mA for LED current regulation. Use Value: Supports 10% duty-cycle flash operation (400ms max on-time) while maintaining <1µA shutdown current for extended battery life. |
| PDA/Camcorder Backlight | Portable Medical Diagnostic Display |
|
Use Scenario: Providing 9–15V backlight supply for color LCDs in handheld PDAs and camcorders operating from 2.7–5.5V battery sources. IC Role / Device Role / Timing Role: High-efficiency TinyBoost™ regulator with 85%+ efficiency at 50mA load and 3.6V input. Use Value: Delivers consistent brightness across battery discharge curve due to tight line regulation (≤1.5%/V) and low 0.4Ω switch RDS(on). |
Use Scenario: Generating clean, stable 33V bias for OLED or high-brightness LCD panels in portable ultrasound or glucose monitor displays. IC Role / Device Role / Timing Role: 33V-capable boost regulator with thermal shutdown (150°C trip) and over-voltage protection for safety-critical medical use. Use Value: Meets IEC 60601-1 creepage/clearance requirements via 3x3mm UMLP package and robust fault protection-no secondary supervision needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61085DGRT | 2.5MHz switching frequency, 2.7–6V input, 28V max output, 1.2A peak current, requires external compensation. | Higher frequency allows smaller inductors but increases EMI sensitivity; lacks integrated OVP at FB pin. | Prefer when board space is constrained and higher efficiency at light loads is required; verify loop stability with chosen COUT. |
| MAX8647ETE+ | 1.2MHz frequency, 2.5–5.5V input, 28V max output, 1.3A peak current, integrated soft-start and thermal shutdown. | Lower max output voltage (28V vs. 33V); no cycle-by-cycle current limit-uses average-current foldback instead. | Choose for cost-sensitive consumer electronics where 28V output suffices and lower quiescent current (2.5µA) is prioritized over peak current headroom. |
Compared with TPS61085DGRT and MAX8647ETE+, the FAN5336UMPX offers higher output voltage capability (33V), tighter load regulation (0.2%), and built-in FB over-voltage protection-making it uniquely suited for 33V LCD bias and high-voltage flash LED drivers where fault resilience is critical.
Availability
FAN5336UMPX is available at Aetrix Electronics and suitable for portable display bias, smartphone LED backlight, and portable medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for FAN5336UMPX 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 legacy analog and power IC manufacturer known for high-performance DC-DC converters, motor drivers, and discrete power solutions.
The FAN5336UMPX belongs to Fairchild's TinyBoost™ family-designed specifically for space-constrained, battery-powered portable electronics needing efficient, low-noise, high-voltage boost conversion with minimal external components.
FAQ
What is the maximum output voltage supported by the FAN5336UMPX?
The FAN5336UMPX supports an adjustable output voltage range of 9V to 33V, verified under recommended operating conditions (VIN = 4.0–5.5V). At 33V output, it delivers up to 50mA continuous current; at 21V, it sustains 100mA with 400ms maximum on-time for flash LED applications. This 33V capability is enabled by its integrated 33V-rated FET switch and over-voltage protection circuitry.
Does the FAN5336UMPX require external compensation components?
No, the FAN5336UMPX features internal compensation, eliminating the need for external RC networks. Stability is ensured with standard ceramic output capacitors (≥4.7µF) and the recommended 180pF feedforward capacitor (CF). This simplifies design, reduces BOM count, and improves layout robustness-particularly beneficial for compact portable PCBs where routing area is limited.
How does the FAN5336UMPX handle over-current conditions?
The FAN5336UMPX implements cycle-by-cycle current limiting with a 1.5A peak threshold. Each switching cycle is monitored via the internal 30mΩ sense resistor; if current exceeds the limit, the PWM comparator resets the latch immediately, turning off the internal FET. This protects the device during startup surges or output shorts without latching off-allowing automatic recovery once the overload clears.
What package type is used for the FAN5336UMPX, and how does it differ from FAN5336MPX?
The FAN5336UMPX uses a 6-lead 3×3mm Ultrathin Molded Leadless Package (UMLP) with 0.8mm thickness, whereas the FAN5336MPX uses the standard 3×3mm MLP (1.0mm thick). Both share identical pinout and thermal pad (P1/GND), but the UMLP variant enables thinner end products-critical for ultra-slim smartphones, wearables, and portable medical devices where Z-height is constrained.
Can the FAN5336UMPX drive flash LEDs, and what are the operational limits?
Yes, the FAN5336UMPX is explicitly rated for serial flash LED driving: it delivers up to 100mA at 21V with a maximum on-time of 400ms and 10% duty cycle. This is validated in the datasheet's Applications Information section and supported by thermal shutdown (150°C trip) and cycle-by-cycle current limiting-ensuring safe, repeatable flash operation without external current control circuitry.
FAN5336UMPX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBoost®
- Package/Case:
- 6-UDFN 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-UMLP (3x3)
FAN5336UMPX FAQ
1.How can I place an order for FAN5336UMPX through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN5336UMPX 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 FAN5336UMPX reliable?
The price and inventory of FAN5336UMPX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN5336UMPX is usually 5 days.
3.What payment methods are accepted for FAN5336UMPX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN5336UMPX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN5336UMPX?
FAN5336UMPX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN5336UMPX 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 FAN5336UMPX?
For technical support, including FAN5336UMPX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN5336UMPX requirements.
6.How does Aetrix verify that FAN5336UMPX is sourced from the original manufacturer or authorized distributors?
All FAN5336UMPX 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 FAN5336UMPX meets industry standards.
7.What is the process for return or replacement of FAN5336UMPX?
All FAN5336UMPX units undergo pre-shipment inspection (PSI). If there is an issue with FAN5336UMPX, 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 FAN5336UMPX part is unused and in its original packaging.
Return procedure for FAN5336UMPX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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