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onsemi FAN5362UMP29X
- Part No.:
- FAN5362UMP29X
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
FAN5362UMP29X.pdf
- Description:
- IC REG BUCK 2.9V 500MA 6UMLP
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Inventory:2,975
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Product details
Overview
FAN5362UMP29X from ON Semiconductor is a 2.9V 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 - designed for RF transceiver and mobile application power rails requiring fast transient response and ultra-low standby power.
For engineers reviewing the FAN5362UMP29X datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.7–5.5V input range, PFM/PWM mode control via MODE pin, seamless 100% duty-cycle operation near dropout, thermal shutdown at 150°C, and compatibility with 1µH inductors and 4.7–24µF ceramic output capacitors.
Technical Context
The FAN5362UMP29X implements a proprietary non-linear fixed-frequency PWM modulator with automatic transition to discontinuous-conduction-mode (DCM) PFM at light loads, maintaining <18mV VOUT glitch during mode switching. Its internal soft-start ramps the reference exponentially to prevent overshoot, while active FB discharge during shutdown ensures clean rail sequencing.
It supports forced PWM via the MODE pin (logic high), external clock synchronization at up to 1.7MHz, and operates with zero dependence on output capacitor ESR - enabling stable regulation with low-ESR ceramic capacitors. The 35ns minimum off-time (tOFF(MIN)) governs low-VIN frequency droop and defines maximum achievable VOUT/VIN ratio in fixed-frequency mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.9V ±3% (at 0–500mA load, VIN ≥ VOUT + 300mV) - enables direct powering of 2.8–3.0V logic rails without feedback resistor network. |
| Max Output Current | 500mA continuous - sufficient for baseband processors, RF front-end ICs, and memory I/O in smartphones and data cards. |
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (3.0–4.2V), USB 5V, and boosted battery rails without intermediate regulation. |
| Switching Frequency | 3.0MHz nominal (2.7–3.3MHz) - allows use of compact 1µH inductors and reduces EMI fundamental frequency above sensitive RF bands. |
| Quiescent Current | 45µA typical in PFM mode - extends battery life in always-on subsystems like GPS receivers or Bluetooth LE radios. |
| Efficiency | ≥90% at 1mA load; 96% peak - maintains high conversion efficiency across full dynamic range, critical for thermally constrained mobile PCBs. |
| Thermal Shutdown | 150°C activation with 15°C hysteresis - protects against sustained overload or poor heatsinking in sealed handheld enclosures. |
Pinout & Package
Package: 6-lead 2 × 2mm Ultra-Thin Molded Leadless Package (UMLP), 0.65mm lead pitch, 0.55mm max height - optimized for space-constrained mobile PCBs with exposed thermal pad (pin 6 = GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Accepts 2.7–5.5V supply; requires local 2.2µF ceramic decoupling placed adjacent to pin to suppress switching noise and ensure stable control loop operation. |
| EN | Enable Control | Active-high digital enable (VENH = 1.05V min); pulls FB to GND during shutdown - enables precise power-rail sequencing and system-level sleep/wake control. |
| MODE | Operation Mode Select | Logic HIGH forces fixed-frequency PWM; LOW enables auto PFM/PWM transition; also accepts external sync clock at ≤1.7MHz - provides flexibility for EMI-sensitive or low-noise applications. |
| SW | Switch Node | Connects to inductor; carries high di/dt switching current - must be routed short and wide with minimal loop area to reduce radiated emissions and voltage spikes. |
| FB | Feedback / Output Sense | Internally tied to 2.9V reference; no external resistors needed - eliminates BOM cost and layout sensitivity of adjustable regulators. |
| GND | Power & Signal Ground | Common return for VIN, SW, EN, MODE, and FB; connects to thermal pad - forms primary current return path and critical thermal conduction path to PCB copper. |
Key Features
| Feature | Design Value |
|---|---|
| 3MHz Fixed-Frequency Operation | Enables use of miniature 1µH inductors and 0603/0805 ceramic capacitors - reduces solution footprint by >40% vs. 1MHz buck converters. |
| PFM Mode with 45µA IQ | Maintains >90% efficiency down to 1mA load - extends battery runtime in idle or sensor-monitoring states without sacrificing transient response. |
| Seamless 100% Duty-Cycle Transition | Eliminates output undershoot/overshoot when VIN drops near VOUT (e.g., Li-ion discharge to 3.0V) - ensures uninterrupted operation of voltage-sensitive RF ICs. |
| Internal Soft-Start (180–300µs) | Prevents inrush current and output overshoot during power-up - avoids false triggering of downstream reset circuits or brown-out detectors. |
| Thermal Shutdown + UVLO | Protects against overtemperature (150°C) and invalid input conditions (UVLO threshold = 2.6V ±0.1V) - enhances system reliability in unregulated power environments. |
Applications
| SD Flash Memory Power Supply | RF Transceiver Power |
|---|---|
Use Scenario: Powering NAND flash I/O and core rails in smartphone storage modules during read/write bursts and deep-sleep states. IC Role / Device Role / Timing Role: Primary DC/DC converter delivering regulated 2.9V at up to 500mA with sub-10µs load transient recovery. Use Value: Maintains stable VCCQ during 0→150mA load steps with <15mV VOUT deviation - prevents flash command timeout or data corruption. |
Use Scenario: Supplying PA bias and LNA/VCO circuitry in LTE/WiFi front-end modules with strict ripple and noise requirements. IC Role / Device Role / Timing Role: Low-noise, high-PSRR point-of-load regulator synchronized to system clock to avoid beat frequencies in RF band. Use Value: Achieves <20mVpp ripple at 500mA with 4.7µF COUT and supports MODE-pin sync to avoid interference with 2.4GHz/5GHz channels. |
| Smartphone Application Processor Core | Tablet Baseband Subsystem |
Use Scenario: Providing always-on 2.9V supply to application processor's auxiliary domains (camera ISP, audio codec, sensor hub) during display-off mode. IC Role / Device Role / Timing Role: Standby power manager operating in PFM mode with 45µA IQ and instant wake-up capability. Use Value: Delivers >92% efficiency at 100µA load - reduces quiescent power by 3× vs. LDO solutions, extending standby time by hours. |
Use Scenario: Powering multi-band baseband ICs (3G/LTE/WiMAX) requiring clean, dynamically scalable voltage rails with fast load step response. IC Role / Device Role / Timing Role: High-transient-response buck regulator supporting 50→400mA load steps within 5µs. Use Value: Limits VOUT deviation to <25mV during 350mA load transients - prevents baseband lock loss or packet error during handover events. |
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 | 2.9V fixed, 500mA, 3MHz, but uses external compensation and lacks 100% duty-cycle mode - higher BOM count and no dropout recovery. | Requires external RC network for stability; less suitable for Li-ion systems operating below 3.2V. | Choose if design already uses TI ecosystem and requires adjustable soft-start timing. |
| RT8059GJ6 | 2.9V fixed, 600mA, 3MHz, but only supports forced PWM - no PFM mode, resulting in 250µA IQ vs. 45µA. | Higher light-load power consumption limits use in battery-critical always-on functions. | Choose if absolute EMI predictability is prioritized over efficiency at microamp loads. |
Compared with TPS62231DRYR and RT8059GJ6, the FAN5362UMP29X uniquely combines ultra-low quiescent current, seamless dropout recovery, and integrated feedback - delivering superior battery life and robustness in space-constrained mobile power designs without added passives or complexity.
Availability
FAN5362UMP29X is available at Aetrix Electronics and suitable for smartphone power management, RF front-end biasing, and portable storage subsystems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for FAN5362UMP29X 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 focused on energy-efficient electronics for automotive, industrial, cloud computing, and mobile applications.
The FAN5362 series belongs to ON Semiconductor's high-frequency DC/DC converter product line, engineered specifically for compact, battery-powered consumer devices demanding high efficiency across wide load ranges and robust transient performance.
FAQ
What is the recommended input capacitor for FAN5362UMP29X?
The FAN5362UMP29X requires a 2.2µF X5R ceramic capacitor rated for ≥6.3V, placed directly between VIN and GND with minimal trace length. This value ensures adequate high-frequency decoupling to suppress switching noise and maintain loop stability - using smaller values risks increased input ripple and potential control loop instability.
Does FAN5362UMP29X support external synchronization?
Yes, FAN5362UMP29X supports external clock synchronization via the MODE pin. When a square wave is applied to MODE, the device synchronizes its switching frequency to four times the input frequency, up to 1.7MHz. This feature allows EMI reduction through frequency dithering or alignment with system clocks to avoid interference bands.
What is the maximum output capacitance allowed for FAN5362UMP29X?
The FAN5362UMP29X supports output capacitance up to 24µF. Exceeding this value may cause startup failure due to excessive displacement current during soft-start. For optimal transient response and ripple suppression, 4.7–10µF X5R/X7R ceramics in 0603 or 0805 packages are recommended - larger values improve load step response but require verification of startup behavior.
How does the MODE pin affect FAN5362UMP29X operation?
The MODE pin on FAN5362UMP29X controls operating mode: logic LOW enables automatic PFM/PWM transition for best light-load efficiency; logic HIGH forces continuous PWM for fixed-frequency operation and lowest output ripple. It also serves as sync input - applying a square wave toggles synchronization to 4× that frequency, enabling EMI management.
What thermal performance can be expected from FAN5362UMP29X in UMLP package?
In the 6-lead 2×2mm UMLP package, FAN5362UMP29X has a typical junction-to-ambient thermal resistance (θJA) of 49°C/W on a standard 4-layer PCB with thermal vias under the GND pad. At 500mA load and 3.6V input, junction temperature rise remains below 40°C - well within the 125°C max operating limit, provided minimum 100mm² copper pour is used beneath the package.
FAN5362UMP29X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
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- Output Type:
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- Number of Outputs:
- -
- Voltage - Input (Min):
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- Voltage - Input (Max):
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- Voltage - Output (Min/Fixed):
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- Voltage - Output (Max):
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- Current - Output:
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- Frequency - Switching:
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- Synchronous Rectifier:
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- Supplier Device Package:
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FAN5362UMP29X FAQ
1.How can I place an order for FAN5362UMP29X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN5362UMP29X 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 FAN5362UMP29X reliable?
The price and inventory of FAN5362UMP29X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN5362UMP29X is usually 5 days.
3.What payment methods are accepted for FAN5362UMP29X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN5362UMP29X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN5362UMP29X?
FAN5362UMP29X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN5362UMP29X 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 FAN5362UMP29X?
For technical support, including FAN5362UMP29X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN5362UMP29X requirements.
6.How does Aetrix verify that FAN5362UMP29X is sourced from the original manufacturer or authorized distributors?
All FAN5362UMP29X 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 FAN5362UMP29X meets industry standards.
7.What is the process for return or replacement of FAN5362UMP29X?
All FAN5362UMP29X units undergo pre-shipment inspection (PSI). If there is an issue with FAN5362UMP29X, 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 FAN5362UMP29X part is unused and in its original packaging.
Return procedure for FAN5362UMP29X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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