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onsemi FAN53600AUC28X
- Part No.:
- FAN53600AUC28X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53600AUC28X.pdf
- Description:
- IC REG BUCK 2.8V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,072
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Product details
Overview
FAN53600AUC28X from ON Semiconductor is a 3 MHz, 600 mA synchronous step-down DC-DC regulator with fixed 2.8 V output, operating from 2.3 V to 5.5 V input. It integrates PMOS/NMOS power switches (175 mΩ/165 mΩ RDS(on)), features 26 µA typical quiescent current in PFM mode, and delivers up to 97% peak efficiency. It is designed for space-constrained mobile power rails in data cards and ultra-portable computing.
For engineers reviewing the FAN53600AUC28X datasheet, pinout, applications, or equivalent options, key selection criteria include its WLCSP-6 package footprint, MODE-pin-controllable PWM/autonomous PFM operation, 180–300 µs soft-start timing, and verified 2.702–2.898 V output voltage accuracy across 0–600 mA load and 3.8–5.0 V input.
Technical Context
The FAN53600AUC28X employs a proprietary non-linear fixed-frequency PWM modulator with seamless transition to pulse-frequency modulation (PFM) at light loads. Its control loop maintains stable 3 MHz switching across wide VIN (2.3–5.5 V) and IOUT (0–600 mA) ranges without requiring output capacitor ESR compensation.
It supports external clock synchronization via the MODE pin (1.3–1.7 MHz input yields 2× synchronized fSW), enables forced PWM mode, and integrates internal soft-start, UVLO (2.27 V threshold, 200 mV hysteresis), thermal shutdown (150°C), and active output discharge (230 Ω path).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±3.5% (2.702–2.898 V) over full load and input range - ensures stable core logic rail for 2.8 V I/O interfaces. |
| Max Output Current | 600 mA continuous - sufficient for single-core application processors or RF front-end biasing in portable devices. |
| Switching Frequency | 3.0 MHz ±10% - enables use of compact 1 µH inductor and 10 µF ceramic output capacitor, minimizing board area. |
| Quiescent Current | 26 µA typical in PFM mode - extends battery life in always-on subsystems like modem standby or sensor hubs. |
| Input Voltage Range | 2.3 V to 5.5 V - compatible with single-cell Li-ion (2.7–4.2 V), Li-polymer, or dual-cell NiMH inputs without pre-regulation. |
| Efficiency Peak | 97% at mid-load - reduces thermal dissipation in thermally constrained WLCSP-6 package (θJA = 125°C/W). |
| Soft-Start Time | 180–300 µs - prevents inrush current during power-up while maintaining fast system boot timing. |
Pinout & Package
Package: WLCSP-6 (Wafer-Level Chip-Scale Package), 0.4 mm ball pitch, 1.16 mm × 0.86 mm footprint, 586 µm typical height. Requires NSMD land pattern with 0.260 mm diameter solder mask opening per ball.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Logic-controlled mode select: high = forced PWM; low = auto PFM/PWM transition; also accepts sync clock (1.3–1.7 MHz) for frequency locking. |
| B1 | SW | Switch node - connects directly to external inductor; carries high di/dt switching current; requires tight layout to minimize EMI and voltage spikes. |
| C1 | FB | Feedback input - internally connected to 2.8 V reference; no external resistor divider needed; sensitive to noise - must be routed away from SW. |
| C2 | GND | Power and signal ground - sole reference for all internal circuits; must be tied to low-impedance PCB ground plane under package. |
| B2 | EN | Enable input - active-high (VIH ≥ 1.2 V); < 0.4 V disables regulator and activates output discharge; 0.25–1.0 µA shutdown current. |
| A2 | VIN | Main power input - supplies internal LDOs and gate drivers; requires local 2.2 µF ceramic capacitor placed within 2 mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ PFM mode | 26 µA typical - enables >100-hour standby in battery-powered IoT nodes without compromising transient response. |
| Integrated active discharge | 230 Ω internal path from FB to GND when EN = low - ensures rapid output discharge for safe power sequencing in multi-rail systems. |
| Thermal and overload protection | 150°C junction shutdown with 15°C hysteresis and cycle-by-cycle current limiting (1.1 A typical peak) - prevents damage during short-circuit or overload faults. |
| High-efficiency synchronous rectification | 175 mΩ PMOS + 165 mΩ NMOS integrated switches - eliminates external Schottky loss, enabling 97% peak efficiency at 3.6 VIN/2.8 VOUT. |
| Robust input UVLO | 2.27 V turn-on threshold with 200 mV hysteresis - prevents erratic startup during brown-out conditions common in Li-ion discharge profiles. |
Applications
| 3G/4G/LTE Data Cards | Tablet SoC Core Rail |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver in mini-PCIe or M.2 form-factor cellular modems. IC Role / Device Role / Timing Role: Primary 2.8 V supply for digital baseband core and analog front-end biasing; operates in auto-PFM to extend battery runtime during idle. Use Value: 26 µA quiescent current and 97% efficiency at 300 mA enable >12-hour standby on 1500 mAh battery; WLCSP-6 footprint fits tight card-edge layouts. |
Use Scenario: Delivering clean, regulated 2.8 V to application processor I/O banks in 7–10 inch tablets. IC Role / Device Role / Timing Role: Secondary buck converter downstream of main PMIC; handles dynamic load steps up to 600 mA during GPU burst activity. Use Value: Superior load transient response (<50 mV deviation at 200→800 mA step) maintains signal integrity on high-speed MIPI DSI/CSI interfaces. |
| Digital Still Cameras (DSC) | Netbooks & Ultra-Mobile PCs |
Use Scenario: Supplying image sensor interface and ISP core voltage in compact DSC modules with limited PCB real estate. IC Role / Device Role / Timing Role: Dedicated 2.8 V rail for CMOS image sensor digital I/O and embedded flash controller; enabled only during capture sequence. Use Value: 300 µs soft-start prevents sensor reset glitches; 1 µH inductor + 10 µF output cap meets size constraints while supporting 500 mA peak sensor readout current. |
Use Scenario: Providing auxiliary 2.8 V rail for USB 3.0 PHY, eMMC controller, or Wi-Fi/BT combo chip in fanless netbook designs. IC Role / Device Role / Timing Role: Standalone point-of-load regulator; synchronizes switching to system clock via MODE pin to reduce EMI coupling into audio or display paths. Use Value: 3 MHz fixed-frequency operation avoids audible noise in speaker amplifiers; forced PWM mode eliminates PFM frequency variation during video playback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 2.8 V fixed, 600 mA, 3.6 MHz, 17 µA IQ, WSON-6 (2 mm × 2 mm) | Larger footprint (4× area), higher fSW, no MODE-pin sync capability | Preferred where board space allows larger package and higher switching frequency is acceptable for smaller inductors. |
| RT8059ZSP | 2.8 V fixed, 600 mA, 2.5 MHz, 25 µA IQ, WDFN-6 (2 mm × 2 mm) | Lower fSW, no external sync, no active discharge, larger thermal pad | Suitable for cost-sensitive designs where PFM-only operation and absence of discharge path are acceptable. |
Compared with TPS62231DRVR and RT8059ZSP, the FAN53600AUC28X offers the smallest PCB footprint (WLCSP-6), integrated MODE-pin synchronization, and guaranteed active discharge - making it optimal for ultra-thin mobile devices requiring strict EMI control and safe power sequencing.
Availability
FAN53600AUC28X is available at Aetrix Electronics and suitable for 3G/4G data cards, tablet SoC I/O rails, digital camera sensor interfaces, and netbook peripheral power requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for FAN53600AUC28X 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 is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and mobile markets.
The FAN53600 series belongs to ON Semiconductor's high-frequency, ultra-compact DC-DC regulator product line, engineered specifically for space- and efficiency-critical portable electronics requiring sub-1 mm profile and microamp-level quiescent current.
FAQ
What is the recommended inductor value for FAN53600AUC28X?
The FAN53600AUC28X is optimized for a 1 µH shielded power inductor rated for ≥600 mA saturation current and ≤190 mΩ DCR. Murata LQM21PN1R0MC0 is validated per datasheet Figure 4–26. Using 2.2 µH improves ripple but degrades transient response; values below 0.8 µH risk instability and excessive RMS losses.
Does FAN53600AUC28X require an external feedback resistor divider?
No. The FAN53600AUC28X has an internal 2.8 V reference connected directly to the FB pin. No external resistors are needed - FB must be connected only to the output capacitor's VOUT node. Adding external components to FB will disrupt regulation and void output accuracy guarantees.
How does the MODE pin affect FAN53600AUC28X operation?
When MODE is pulled high (>1.2 V), FAN53600AUC28X forces continuous PWM mode regardless of load. When MODE is low (<0.4 V), it enables automatic PFM/PWM transition. Applying a 1.3–1.7 MHz square wave to MODE synchronizes switching to twice that frequency - critical for EMI reduction in dense layouts.
What is the maximum allowable input voltage for FAN53600AUC28X?
The absolute maximum input voltage for FAN53600AUC28X is 7.0 V, but the recommended operating range is strictly 2.3 V to 5.5 V. Exceeding 5.5 V risks permanent damage to internal MOSFETs and gate drivers, even momentarily - design must include input clamping or upstream protection if VIN may surge.
Is FAN53600AUC28X RoHS compliant and lead-free?
Yes. FAN53600AUC28X is manufactured in compliance with RoHS Directive 2011/65/EU and is lead-free. The WLCSP-6 package uses SnAgCu (SAC305) solder balls, and the device meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30°C/85% RH.
FAN53600AUC28X 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):
- 2.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WLCSP (1.23x0.88)
FAN53600AUC28X FAQ
1.How can I place an order for FAN53600AUC28X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53600AUC28X 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 FAN53600AUC28X reliable?
The price and inventory of FAN53600AUC28X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53600AUC28X is usually 5 days.
3.What payment methods are accepted for FAN53600AUC28X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53600AUC28X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53600AUC28X?
FAN53600AUC28X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53600AUC28X 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 FAN53600AUC28X?
For technical support, including FAN53600AUC28X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53600AUC28X requirements.
6.How does Aetrix verify that FAN53600AUC28X is sourced from the original manufacturer or authorized distributors?
All FAN53600AUC28X 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 FAN53600AUC28X meets industry standards.
7.What is the process for return or replacement of FAN53600AUC28X?
All FAN53600AUC28X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53600AUC28X, 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 FAN53600AUC28X part is unused and in its original packaging.
Return procedure for FAN53600AUC28X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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