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onsemi FAN5362UMP33X
- Part No.:
- FAN5362UMP33X
- Manufacturer:
- onsemi
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
FAN5362UMP33X.pdf
- Description:
- IC REG BUCK 3.3V 500MA 6UMLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,864
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Product details
Overview
FAN5362UMP33X from ON Semiconductor is a 3.3V fixed-output, 500mA synchronous buck regulator in a 6-lead 2×2mm UMLP package, operating at 3MHz with 45µA quiescent current and 96% peak efficiency. It delivers stable power to RF transceivers and mobile application processors requiring low-noise, fast transient response under 2.7–5.5V input.
For engineers reviewing the FAN5362UMP33X datasheet, pinout, applications, or equivalent options, this page provides verified technical context, validated pin functions, confirmed load/efficiency behavior at 3.3V output, and real-world alternative selection guidance for portable DC/DC design.
Technical Context
The FAN5362UMP33X uses a proprietary non-linear PWM modulator with seamless PFM/PWM mode transition, maintaining 3MHz switching up to ~3.3V input while dropping frequency only when VIN approaches VOUT due to 35ns minimum off-time. Its synchronous rectification architecture enables >90% efficiency down to 1mA load.
It supports forced PWM via the MODE pin, external clock synchronization at 1.3–1.7MHz, and 100% duty-cycle dropout operation with calculated VDROPOUT based on PMOS RDS(on) and inductor DCR. Thermal shutdown activates at 150°C with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3% (guaranteed over 0–500mA load, VIN ≥ VOUT + 300mV) |
| Max Output Current | 500mA continuous (validated for 3.3V variant per ordering table) |
| Input Voltage Range | 2.7V to 5.5V (minimum VIN = max[2.7V, VOUT + 300mV]) |
| Switching Frequency | 3.0MHz nominal (2.7–3.3MHz range; drops below 3MHz only near 100% duty cycle) |
| Quiescent Current | 45µA typical in PFM mode (enables >90% efficiency at 1mA load) |
| Efficiency | 96% peak; >90% maintained from 1mA to full 500mA load |
| Package | 6-Lead UMLP, 2×2mm body, 0.65mm max height, leadless molded construction |
Pinout & Package
6-Lead Ultrathin Molded Leadless Package (UMLP), 2×2mm footprint, no exposed pad, leadless terminations with 0.65mm pitch. Designed for high-density portable PCBs with minimal thermal resistance (θJA = 49°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Connects to 2.7–5.5V source; supplies internal circuitry and high-side switch |
| EN | Enable Control | Active-high logic input; device enabled above 1.2V, shut down below 0.4V; <1µA shutdown current |
| MODE | Operating Mode Select | Logic HIGH forces PWM mode; LOW enables auto PFM/PWM transition; also accepts sync clock input |
| SW | Switch Node | Drives external inductor; connects to drain of internal high-side PMOS and source of NMOS |
| FB | Feedback / Output Sense | Direct connection to regulated 3.3V output; internal resistor divider sets feedback reference |
| GND | Power & Signal Ground | Common return for input, output, and IC bias; must be low-impedance plane under package |
Key Features
| Feature | Design Value |
|---|---|
| 3MHz Fixed-Frequency Operation | Enables use of compact 1µH inductor and 4.7µF ceramic output capacitor; reduces solution size vs. lower-frequency regulators |
| PFM Mode at Light Load | Maintains >90% efficiency at 1mA load with 45µA quiescent current-critical for battery runtime in standby states |
| Seamless 100% Duty-Cycle Transition | Eliminates output overshoot during VIN dip/recovery; sustains regulation as VIN falls to VOUT + dropout voltage |
| Internal Soft-Start | 300µs typical ramp prevents inrush current and output overshoot during EN assertion; discharges FB during shutdown |
| Thermal Shutdown Protection | Activates at 150°C junction temperature with 20°C hysteresis-prevents permanent damage under sustained overload or poor heatsinking |
Applications
| RF Transceiver Power | Mobile Application Processor Core |
|---|---|
Use Scenario: Powering LTE/WiFi transceiver ICs in smartphones where supply noise and transient response directly impact EVM and throughput. IC Role / Device Role / Timing Role: Primary step-down regulator delivering clean, tightly regulated 3.3V to RF front-end modules. Use Value: 3MHz switching minimizes conducted EMI near cellular bands; best-in-class load transient response suppresses VOUT droop during TX burst events. |
Use Scenario: Supplying I/O or auxiliary rails for application processors in tablets and ultra-mobile PCs with dynamic DVFS requirements. IC Role / Device Role / Timing Role: Secondary buck converter providing stable 3.3V for processor interfaces, memory controllers, or peripheral buses. Use Value: Seamless PFM-to-PWM transition ensures consistent regulation across sleep/active states without voltage glitches or mode-switching artifacts. |
| SD Flash Memory Power | Gaming Device Display Backlight Driver |
Use Scenario: Powering high-speed SD/UHS-I memory cards in portable devices where voltage stability affects write endurance and error rates. IC Role / Device Role / Timing Role: Dedicated LDO-replacement buck regulator supplying 3.3V to SD card VCC pin. Use Value: 96% peak efficiency extends battery life during large file transfers; low 45µA IQ preserves charge during card idle periods. |
Use Scenario: Generating 3.3V bias for LED driver ICs or display interface circuitry in handheld gaming consoles. IC Role / Device Role / Timing Role: Compact, thermally efficient point-of-load regulator placed near display subsystem. Use Value: UMLP package enables placement directly under display flex; 49°C/W θJA allows operation at full 500mA without external heatsink in thin form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3.3V fixed, 600mA, 3.6MHz, 17µA IQ, 2×2mm WSON-6 package | Lower IQ improves ultra-light-load efficiency; higher fSW requires smaller 0.47µH inductor but increases EMI filtering complexity | Preferred for longest battery life in always-on sensor nodes; less suitable for RF-sensitive layouts due to higher switching frequency |
| RT8059GJ6 | 3.3V fixed, 500mA, 2.5MHz, 30µA IQ, 2×2mm DFN-6 package with exposed thermal pad | Lower fSW eases EMI compliance; exposed pad improves θJA to 40°C/W but requires PCB thermal relief design | Better thermal margin in enclosed enclosures; requires additional solder mask opening and thermal vias not needed for FAN5362UMP33X's UMLP |
Compared with TPS62231DRYR and RT8059GJ6, the FAN5362UMP33X offers superior light-load transient response and seamless 100% duty-cycle operation-key for systems experiencing rapid VIN dips-but trades slightly higher IQ than TPS62231DRYR and lacks an exposed thermal pad like RT8059GJ6.
Availability
FAN5362UMP33X is available at Aetrix Electronics and suitable for RF transceiver power, mobile processor I/O rails, and SD flash memory supply applications requiring stable component supply, long-term lifecycle support, and production-ready qualification.
Supply support for FAN5362UMP33X 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
ON Semiconductor (formerly Fairchild Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable electronics.
The FAN5362 series was designed specifically for space-constrained, battery-powered mobile devices requiring high-efficiency, low-noise, and fast-transient DC/DC conversion with minimal external components.
FAQ
What is the maximum continuous output current for FAN5362UMP33X?
The FAN5362UMP33X is rated for 500mA continuous output current at 3.3V output, as confirmed in the Ordering Information table and Electrical Characteristics section. This rating assumes proper PCB layout, adequate thermal dissipation (θJA = 49°C/W), and input voltage ≥ VOUT + 300mV. Peak current limit is 800–1150mA depending on conditions, but sustained operation beyond 500mA may trigger thermal shutdown.
Does FAN5362UMP33X require an external feedback resistor network?
No, the FAN5362UMP33X does not require external feedback resistors. It is a fixed 3.3V output device with an internal resistor divider connected to the FB pin. The FB pin must be connected directly to the output capacitor node to close the regulation loop-no external components are needed for voltage setting.
Can FAN5362UMP33X operate with input voltage below 3.3V?
Yes, the FAN5362UMP33X can operate with input voltage as low as 2.7V, but regulation is maintained only down to VOUT + 300mV (i.e., ≥3.6V for 3.3V output). Below that, it enters 100% duty-cycle dropout mode where VOUT = VIN − VDROPOUT, with VDROPOUT determined by PMOS RDS(on) and load current. This behavior is intentional and glitch-free.
What package type is used for FAN5362UMP33X?
The FAN5362UMP33X uses the 6-Lead Ultrathin Molded Leadless Package (UMLP), measuring 2×2mm with 0.65mm maximum height and no exposed thermal pad. It differs from the WLCSP variant (e.g., FAN5362UC33X) by using gull-wing–like molded leads instead of solder bumps, enabling standard reflow assembly without micro-BGA handling.
How does the MODE pin affect FAN5362UMP33X operation?
The MODE pin on FAN5362UMP33X serves dual functions: pulling it HIGH forces continuous PWM mode (fixed 3MHz), while pulling it LOW enables automatic PFM/PWM transition for optimal light-load efficiency. When driven with a square wave, it synchronizes switching to four times the input frequency-enabling EMI reduction through frequency dithering or system-level clock alignment.
FAN5362UMP33X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 500mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-UMLP (2x2)
FAN5362UMP33X FAQ
1.How can I place an order for FAN5362UMP33X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN5362UMP33X 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 FAN5362UMP33X reliable?
The price and inventory of FAN5362UMP33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN5362UMP33X is usually 5 days.
3.What payment methods are accepted for FAN5362UMP33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN5362UMP33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN5362UMP33X?
FAN5362UMP33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN5362UMP33X 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 FAN5362UMP33X?
For technical support, including FAN5362UMP33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN5362UMP33X requirements.
6.How does Aetrix verify that FAN5362UMP33X is sourced from the original manufacturer or authorized distributors?
All FAN5362UMP33X 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 FAN5362UMP33X meets industry standards.
7.What is the process for return or replacement of FAN5362UMP33X?
All FAN5362UMP33X units undergo pre-shipment inspection (PSI). If there is an issue with FAN5362UMP33X, 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 FAN5362UMP33X part is unused and in its original packaging.
Return procedure for FAN5362UMP33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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