My Inquiry
My Account
onsemi FAN53525UC96X
- Part No.:
- FAN53525UC96X
- Manufacturer:
- onsemi
- Package:
- 15-UFBGA, WLCSP
- Datasheet:
-
FAN53525UC96X.pdf
- Description:
- IC REG BUCK PROG 3A 15WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FAN53525UC96X from Fairchild Semiconductor is a digitally programmable synchronous step-down DC-DC regulator delivering 3.0 A continuous output current with fixed 2.4 MHz switching frequency, 2.5 V–5.5 V input range, and I²C-programmable output voltage from 0.600 V to 1.39375 V in 6.25 mV steps-designed for core power delivery to ARM™, Tegra™, and OMAP™ application processors.
For engineers reviewing the FAN53525UC96X datasheet, pinout, applications, or equivalent options, key selection considerations include its 15-bump WLCSP package (1.310 mm × 2.015 mm, 0.4 mm pitch), PFM mode quiescent current of 50 µA, programmable slew rate, and thermal/overload protection for mobile SoC power rails.
Technical Context
The FAN53525UC96X uses synchronous rectification and proprietary control architecture to maintain >80% efficiency across 10 mA–3.0 A load range while supporting both fixed-frequency (2.4 MHz) and PFM modes. Its I²C interface operates up to 3.4 Mbps and enables dynamic voltage scaling (DVS) with 6.25 mV resolution.
Input under-voltage lockout (UVLO), thermal shutdown, and overload protection are integrated. The regulator supports external inductors from 330 nH to 1.2 µH and output capacitors ≥20 µF, with stability maintained across this range without compensation changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.0 A continuous-supports high-current CPU/GPU core rails without derating at 85°C ambient. |
| Switching Frequency | 2.4 MHz fixed-enables compact 330 nH inductor and 22 µF ceramic output capacitor footprint. |
| Input Voltage Range | 2.5 V to 5.5 V-compatible with single-cell Li-ion, USB, and intermediate bus supplies. |
| Output Voltage Range | 0.600 V to 1.39375 V in 6.25 mV steps-covers ARM Cortex-A series core voltages with DVS granularity. |
| I²C Interface Speed | Up to 3.4 Mbps-enables fast voltage transitions during processor DVFS events. |
| Quiescent Current (PFM) | 50 µA typical-minimizes no-load power loss in always-on system states. |
| Package | 15-bump WLCSP, 1.310 mm × 2.015 mm, 0.4 mm pitch-ultra-compact for space-constrained mobile PCBs. |
Pinout & Package
15-bump wafer-level chip-scale package (WLCSP) in 3×5 array, 0.4 mm ball pitch, nominal height 586 µm (547–625 µm), NSMD land pattern recommended per UC015AB drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Accepts 2.5 V–5.5 V supply; requires local 4.7 µF ceramic decoupling. |
| VOUT | Regulated Output | Delivers programmable 0.6–1.39375 V; connects to 22 µF output capacitor and load. |
| GND | Power Ground | Common return for VIN, VOUT, and internal switches; tied to thermal pad. |
| SCL | I²C Clock | Open-drain input; pulled up externally; supports up to 3.4 Mbps timing. |
| SDA | I²C Data | Open-drain bidirectional; shares pull-up with SCL; enables DVS and status readback. |
| EN | Enable Control | Active-high logic input; <1 µA shutdown current when low. |
| PGOOD | Power-Good Indicator | Open-drain output signaling valid regulation (±8% window) after startup delay. |
| SS/TRK | Soft-Start/Tracking | Configurable for voltage ramp control or external voltage tracking during sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Digital Voltage Programming | I²C interface enables precise, real-time core voltage adjustment (0.600–1.39375 V, 6.25 mV steps) for dynamic power management. |
| Programmable Slew Rate | Controls dV/dt during voltage transitions to prevent overshoot/undershoot during DVFS, reducing need for bulk capacitance. |
| PFM Mode Efficiency | Maintains >80% efficiency down to 10 mA load with only 50 µA quiescent current-critical for standby battery life. |
| Thermal & Overload Protection | Auto-recovering thermal shutdown and cycle-by-cycle current limiting ensure robust operation under fault conditions. |
| Ultra-Small WLCSP | 15-bump, 1.310 mm × 2.015 mm footprint minimizes PCB area versus QFN alternatives-ideal for thin mobile form factors. |
Applications
| Mobile Application Processors | LPDDR3 Memory Power |
|---|---|
Use Scenario: Core voltage supply for ARM Cortex-A series, Tegra, and OMAP processors in smartphones and tablets. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing dynamically scaled VDD_CORE with I²C-controlled DVS. Use Value: Enables precise 6.25 mV voltage steps and fast slew control to match processor DVFS tables while maintaining <1% output ripple. | Use Scenario: Dedicated 1.2 V or 1.35 V supply for LPDDR3 memory subsystems in ultra-mobile PCs and tablets. IC Role / Device Role / Timing Role: Low-noise, high-transient-response buck converter powering memory I/O and core rails. Use Value: 3.0 A capability and best-in-class load transient response ensure stable memory operation during burst read/write cycles. |
| Ultra-Mobile PC Platforms | Gaming Device SoCs |
Use Scenario: Compact, thermally efficient core rail for Intel Atom or ARMADA-based netbooks and 2-in-1 devices. IC Role / Device Role / Timing Role: High-efficiency step-down regulator operating in PFM mode during light-load UI idle states. Use Value: 50 µA quiescent current extends battery runtime in always-on connectivity scenarios without sacrificing 2.4 MHz transient performance. | Use Scenario: GPU and CPU core power in handheld gaming consoles requiring rapid voltage scaling during gameplay intensity shifts. IC Role / Device Role / Timing Role: Digitally programmable buck supplying multiple voltage domains with synchronized I²C updates. Use Value: Programmable slew rate prevents system reset during aggressive DVFS transitions, improving game stability and frame consistency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally programmable buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ2169GJ-AEC1-Z | Automotive-grade AEC-Q100 qualified; 2.2 MHz switching; 2.5 A output; I²C interface with 10 mV step resolution. | Targeted for automotive infotainment SoCs-not optimized for mobile PFM efficiency or WLCSP footprint. | Select when AEC-Q100 compliance and extended temperature range (−40°C to +125°C) are mandatory. |
| TPS628640RRLR | 2.5 V–5.5 V input; 3 A output; 2.4 MHz; I²C with 6.25 mV steps; 1.17 mm × 1.57 mm WLCSP (12-bump). | Lower quiescent current (25 µA PFM); no PGOOD or SS/TRK pins; smaller package but fewer control features. | Choose when minimal footprint and ultra-low IQ outweigh need for power-good signaling and soft-start flexibility. |
Compared with MPQ2169GJ-AEC1-Z and TPS628640RRLR, the FAN53525UC96X uniquely combines 3.0 A capability, 6.25 mV DVS resolution, PGOOD, SS/TRK, and thermal protection in a 15-bump WLCSP-making it optimal for consumer mobile SoC core rails where feature completeness and transient robustness are prioritized over automotive qualification or lowest IQ.
Availability
FAN53525UC96X is available at Aetrix Electronics and suitable for smartphone SoC power, tablet LPDDR3 supply, and ultra-mobile PC core rail applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for FAN53525UC96X 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 was a U.S.-based analog and power IC designer acquired by ON Semiconductor in 2016; known for high-performance power management and signal conditioning solutions.
The FAN53525UC96X belongs to the TinyBuck® family-engineered specifically for space-constrained, high-efficiency core voltage regulation in mobile application processors and advanced SoCs.
FAQ
What is the default output voltage setting for FAN53525UC96X at power-up?
The FAN53525UC96X powers up with VSEL0 = 1.20 V and VSEL1 = 1.225 V, resulting in a default output voltage of 1.20 V. This value is factory-trimmed and stored in nonvolatile configuration bits, ensuring consistent startup behavior without host initialization.
Does FAN53525UC96X support forced PWM mode, and how is it enabled?
Yes, FAN53525UC96X supports forced PWM mode to disable automatic PFM entry. It is enabled via I²C register bit PWM_EN (address 0x01, bit 4). When set, the regulator maintains 2.4 MHz fixed-frequency operation regardless of load, eliminating PFM frequency variation for noise-sensitive applications.
What is the maximum recommended inductor value for stable operation of FAN53525UC96X?
The FAN53525UC96X supports inductors up to 1.2 µH while maintaining loop stability and transient performance. This allows design flexibility for lower DC resistance or higher saturation current, provided the selected inductor meets the 4.2 A DC saturation rating specified for 330 nH and 470 nH variants in the datasheet.
How does the PGOOD pin on FAN53525UC96X behave during startup and fault conditions?
The PGOOD pin on FAN53525UC96X is an open-drain output that pulls low during startup until VOUT reaches ±8% of the programmed target and remains stable for 2 ms. It goes low again during UVLO, thermal shutdown, or overload-providing system-level power sequencing and fault monitoring without external circuitry.
Can FAN53525UC96X be used with ceramic output capacitors smaller than 22 µF?
Yes, FAN53525UC96X is stable with as little as 20 µF total ceramic output capacitance. However, using <22 µF may reduce load transient margin-especially for 3.0 A step loads-so 22 µF (e.g., two 10 µF 0603 X5R caps) is recommended to meet the <1% output deviation spec under full-swing transients.
FAN53525UC96X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- TinyBuck®
- Package/Case:
- 15-UFBGA, WLCSP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 1.39V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-WLCSP (2.02x1.31)
FAN53525UC96X FAQ
1.How can I place an order for FAN53525UC96X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53525UC96X 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 FAN53525UC96X reliable?
The price and inventory of FAN53525UC96X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53525UC96X is usually 5 days.
3.What payment methods are accepted for FAN53525UC96X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53525UC96X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53525UC96X?
FAN53525UC96X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53525UC96X 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 FAN53525UC96X?
For technical support, including FAN53525UC96X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53525UC96X requirements.
6.How does Aetrix verify that FAN53525UC96X is sourced from the original manufacturer or authorized distributors?
All FAN53525UC96X 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 FAN53525UC96X meets industry standards.
7.What is the process for return or replacement of FAN53525UC96X?
All FAN53525UC96X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53525UC96X, 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 FAN53525UC96X part is unused and in its original packaging.
Return procedure for FAN53525UC96X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FAN53525UC96X Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
