My Inquiry
My Account
onsemi FAN53611AUC13X
- Part No.:
- FAN53611AUC13X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53611AUC13X.pdf
- Description:
- IC REG BUCK 1.3V 1A 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,096
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FAN53611AUC13X from onsemi is a 6 MHz, 1 A synchronous buck regulator in WLCSP-6 package delivering fixed 1.300 V output from 2.3–5.5 V input. It features 24 µA quiescent current in PFM mode, internal soft-start, input UVLO (2.27 V), thermal shutdown (150°C), and optional active output discharge (230 Ω). It targets power management in space-constrained mobile SoC rails.
For engineers reviewing the FAN53611AUC13X datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.300 V output accuracy (±3.85% over 0–1 A load), forced-PWM capability via MODE pin, 6 MHz switching frequency enabling 470 nH inductor/4.7 µF capacitor design, and WLCSP-6 footprint compatibility with high-density PCB layouts.
Technical Context
The FAN53611AUC13X uses a proprietary non-linear fixed-frequency PWM modulator with seamless auto-transition between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) PFM at light loads. Its architecture eliminates ESR dependency, supporting ceramic output capacitors while maintaining >80% efficiency down to 1 mA load.
Control logic integrates EN-driven soft-start (50 mV/µs slew to 1 V, then 12.5 mV/µs), MODE-pin-synchronized switching (×4 multiplication of 1.3–1.7 MHz external clock), and cycle-by-cycle current limiting with hiccup-mode fault recovery after 16 overcurrent cycles. UVLO (2.27 V rising threshold, 200 mV hysteresis) and thermal shutdown (150°C, 15°C hysteresis) ensure robust startup and overload protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.300 V ±3.85% (1.250–1.350 V) over 0–1 A load; enables direct core supply for low-voltage processors without external feedback resistors. |
| Max Output Current | 1 A continuous; supports high-efficiency power delivery to application processors or RF transceivers in portable devices. |
| Switching Frequency | 6 MHz nominal (5.4–6.6 MHz); allows ultra-small passive components: 470 nH inductor and 4.7 µF ceramic output capacitor. |
| Quiescent Current | 24 µA typical in PFM mode; maintains >80% efficiency at 1 mA load, critical for battery-backed always-on functions. |
| Input Voltage Range | 2.3 V to 5.5 V; compatible with single-cell Li-ion (3.0–4.2 V), USB 5 V, and boosted 3.3 V rails. |
| Package | WLCSP-6, 0.4 mm pitch, 1.16 × 0.86 mm footprint; optimized for minimal board area in thin mobile form factors. |
| Thermal Protection | Junction shutdown at 150°C with 15°C hysteresis; prevents damage during sustained overload or poor heatsinking. |
Pinout & Package
Package: Wafer-Level Chip-Scale Package (WLCSP-6), 0.4 mm pitch, 1.16 mm × 0.86 mm body, 586 µm typical height. Bumps face down in standard mounting orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Logic-controlled mode select: HIGH forces fixed PWM; LOW enables auto PFM/PWM transition; also accepts 1.3–1.7 MHz sync clock (×4 output). |
| B1 | SW | Switching node connection to inductor; carries high di/dt pulsed current; requires tight layout to minimize parasitic inductance. |
| C1 | FB | Feedback input tied directly to output; sets regulated voltage internally-no external resistor divider needed for fixed 1.300 V. |
| C2 | GND | Power and signal ground reference; must be connected to low-impedance PCB plane adjacent to CIN/COUT common point. |
| B2 | EN | Enable input: >1.2 V enables regulation; <0.4 V disables with <1 µA shutdown current and optional active FB discharge (230 Ω path). |
| A2 | VIN | Main input supply (2.3–5.5 V); requires local 2.2 µF ceramic decoupling placed within 1 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 24 µA in PFM mode preserves battery life in standby without sacrificing transient response. |
| 6 MHz fixed-frequency operation | Enables smallest possible magnetics and capacitance-reducing solution size by >40% vs. 2 MHz buck regulators. |
| Internal soft-start | Controlled 50 mV/µs ramp to 1 V then 12.5 mV/µs to final setpoint prevents inrush current and output overshoot. |
| Active output discharge | 230 Ω internal path discharges FB to GND when EN = LOW, ensuring fast, controlled rail collapse for sequencing. |
| Best-in-class load transient response | Maintains <±30 mV deviation during 10–200–10 mA load steps (100 ns edge), critical for burst-mode processor cores. |
Applications
| Mobile Application Processor Core Rail | Wi-Fi/Bluetooth SoC Power Supply |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores requiring tightly regulated 1.3 V at up to 1 A with rapid dynamic voltage scaling. IC Role / Device Role / Timing Role: Primary step-down DC-DC converter delivering stable core voltage with sub-300 µs soft-start and hiccup-mode fault recovery. Use Value: Enables energy-efficient DVFS operation while maintaining <±2% output regulation across temperature and load-verified at -40°C to +85°C. |
Use Scenario: Supplies clean 1.3 V to integrated Wi-Fi 6/Bluetooth 5.2 radio subsystems in smartphones and tablets. IC Role / Device Role / Timing Role: Low-noise, high-PSRR (65 dB @ 100 kHz) buck regulator minimizing RF interference and improving receiver sensitivity. Use Value: Delivers >90% peak efficiency at 300 mA and <15 mVpp ripple under 200 mA load steps-validated with 470 nH/4.7 µF passive set. |
| Ultra-Mobile PC Memory Interface | Portable DSC/DVC Image Sensor Bias |
Use Scenario: Provides 1.3 V to LPDDR4x I/O and termination rails in fanless ultrabooks where thermal headroom is limited. IC Role / Device Role / Timing Role: High-efficiency, thermally robust regulator with 125°C/W θJA and automatic thermal foldback above 125°C junction. Use Value: Sustains full 1 A output at +85°C ambient using only PCB copper; eliminates need for external thermal monitoring circuitry. |
Use Scenario: Powers CMOS image sensor analog front-end and ADC bias circuits in compact digital cameras. IC Role / Device Role / Timing Role: Low-ripple, low-noise power source with PFM mode disabling option to eliminate switching artifacts in analog signal chain. Use Value: Achieves <10 mVpp output ripple in forced-PWM mode-critical for <1 LSB noise floor in 12-bit image capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62260DRVR | Fixed 1.2 V output, 600 mA max, 2.25–6 V input, 2.25 MHz switching, no MODE pin sync capability. | Lacks 1 A rating and 6 MHz frequency; unsuitable for high-current, ultra-compact layouts requiring <500 nH inductors. | Select only if 1.2 V output and lower current suffice and board space permits larger passives. |
| RTQ2132BGQW | Adjustable 0.6–3.3 V output, 1.2 A max, 2.5–5.5 V input, 3 MHz switching, integrated MOSFETs, no PFM mode. | Requires external feedback resistors; higher quiescent current (35 µA); no light-load PFM for battery optimization. | Prefer when adjustable output or higher input voltage range is required-but not for fixed 1.3 V, low-IQ mobile use cases. |
Compared with TPS62260DRVR and RTQ2132BGQW, the FAN53611AUC13X uniquely combines 1.300 V fixed output, 1 A capability, 6 MHz operation, and 24 µA PFM quiescent current in a 1.16 × 0.86 mm WLCSP-making it optimal for space- and efficiency-critical mobile SoC rails where pin count and layout simplicity are prioritized.
Availability
FAN53611AUC13X is available at Aetrix Electronics and suitable for mobile application processors, Wi-Fi/Bluetooth SoCs, ultra-mobile PCs, and portable imaging systems requiring stable component supply with guaranteed long-term manufacturability.
Supply support for FAN53611AUC13X 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and mobile markets.
The FAN53611AUC13X belongs to onsemi's high-frequency synchronous buck regulator product line, designed specifically for compact, battery-powered consumer electronics demanding ultra-small footprints, high light-load efficiency, and fast transient response.
FAQ
What is the output voltage tolerance of the FAN53611AUC13X over full load and temperature?
The FAN53611AUC13X delivers 1.300 V with a guaranteed tolerance of ±3.85% (1.250 V to 1.350 V) across 0–1 A load and -40°C to +85°C ambient temperature, as specified in the Electrical Characteristics table under "VO Output Voltage Accuracy" for the 1.300 V variant. This includes both line and load regulation effects, verified in closed-loop operation.
Does the FAN53611AUC13X require external feedback resistors to set its output voltage?
No, the FAN53611AUC13X is a fixed-output regulator with internal feedback network configured for 1.300 V. The FB pin connects directly to the output capacitor; no external resistors are needed, simplifying layout and reducing BOM count. This is confirmed in the Pin Definitions and Typical Application schematic.
How does the MODE pin function on the FAN53611AUC13X?
The MODE pin on the FAN53611AUC13X serves three roles: (1) logic HIGH (>1.2 V) forces fixed PWM operation; (2) logic LOW (<0.4 V) enables automatic PFM/PWM transition; (3) applying a 1.3–1.7 MHz square wave synchronizes switching at 4× that frequency. It must never be left floating and is internally Schmitt-triggered.
What is the minimum recommended output capacitor for stable operation of the FAN53611AUC13X?
The FAN53611AUC13X is characterized and stabilized with a minimum 4.7 µF X5R ceramic capacitor (0402 or 0603) at the output. The datasheet confirms stability down to 1.6 µF but recommends ≥4.7 µF for optimal transient response and ripple suppression-especially under 1 A load steps.
Is active output discharge available on the FAN53611AUC13X, and how is it enabled?
Yes, the FAN53611AUC13X includes optional active output discharge via an internal 230 Ω path from FB to GND when EN is pulled LOW. This feature is factory-enabled on the AUC13X variant (as indicated by "Yes" in the Ordering Information table) and requires no external components or configuration.
FAN53611AUC13X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- 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):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 6MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.23x0.88)
FAN53611AUC13X FAQ
1.How can I place an order for FAN53611AUC13X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53611AUC13X 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 FAN53611AUC13X reliable?
The price and inventory of FAN53611AUC13X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53611AUC13X is usually 5 days.
3.What payment methods are accepted for FAN53611AUC13X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53611AUC13X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53611AUC13X?
FAN53611AUC13X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53611AUC13X 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 FAN53611AUC13X?
For technical support, including FAN53611AUC13X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53611AUC13X requirements.
6.How does Aetrix verify that FAN53611AUC13X is sourced from the original manufacturer or authorized distributors?
All FAN53611AUC13X 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 FAN53611AUC13X meets industry standards.
7.What is the process for return or replacement of FAN53611AUC13X?
All FAN53611AUC13X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53611AUC13X, 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 FAN53611AUC13X part is unused and in its original packaging.
Return procedure for FAN53611AUC13X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FAN53611AUC13X 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…
