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onsemi FAN53601UC182X-P
- Part No.:
- FAN53601UC182X-P
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53601UC182X-P.pdf
- Description:
- IC REG BUCK 1.82V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:975,000
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Product details
Overview
FAN53601UC182X-P from Fairchild Semiconductor is a 6 MHz, 600 mA synchronous buck regulator delivering a fixed 1.82 V output from 2.3–5.5 V input. It features 24 µA quiescent current in PFM mode, internal soft-start, and under-voltage lockout-designed for space-constrained mobile power rails in tablets and data cards.
For engineers reviewing the FAN53601UC182X-P datasheet, pinout, applications, or equivalent options, key selection criteria include its WLCSP-6 package, forced-PWM capability via MODE pin, light-load efficiency down to 1 mA, and compatibility with 470 nH inductors and 4.7 µF ceramic output capacitors.
Technical Context
The FAN53601UC182X-P uses a proprietary non-linear fixed-frequency PWM modulator with synchronous rectification, enabling 92% peak efficiency and stable 6 MHz operation across input voltages and load currents. Its control loop is independent of output capacitor ESR, supporting low-ESR ceramic capacitors without compensation.
It operates in auto PFM/PWM mode by default, switching seamlessly between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) based on load. The MODE pin supports external clock synchronization at 1.3–1.7 MHz (×4 output), forced PWM, or automatic mode selection-enabling precise ripple and frequency control in noise-sensitive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.82 V ±3.8% (1.755–1.885 V) over 0–600 mA load and –40°C to +85°C. |
| Max Output Current | 600 mA DC, with open-loop peak current limit of 900–1250 mA for robust startup into capacitive loads. |
| Switching Frequency | 6 MHz nominal (5.4–6.6 MHz) in PWM mode; enables ultra-small 470 nH inductor and 4.7 µF output capacitor. |
| Quiescent Current | 24 µA typical in PFM mode at no load-maintains >80% efficiency down to 1 mA load. |
| Input Voltage Range | 2.3 V to 5.5 V-supports single-cell Li-ion, USB, and multi-rail portable systems without pre-regulation. |
| UVLO Threshold | Rising threshold 2.27 V ±0.12 V with 200 mV hysteresis-ensures clean startup and shutdown behavior. |
| Thermal Shutdown | Activates at 150°C junction temperature with 15°C hysteresis-protects during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 6-bump Wafer-Level Chip-Scale Package (WLCSP), 0.4 mm pitch, 1.16 mm × 0.86 mm footprint, 586 µm typical height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Selects operating mode: logic high forces PWM; logic low enables auto PFM/PWM transition; also accepts sync clock (1.3–1.7 MHz) for frequency locking. |
| B1 | SW | Switching node-connects directly to inductor; carries high di/dt pulsed current; requires low-inductance layout to minimize ringing. |
| C1 | FB | Feedback input-monitors regulated 1.82 V output; internally connected to precision voltage reference; no external resistor divider required. |
| C2 | GND | Power and signal ground-must be tied to common PCB ground plane; serves as reference for all analog and digital circuitry. |
| B2 | EN | Enable input-device enabled when voltage >1.2 V; disabled (<0.4 V) reduces supply current to <1 µA; must not float. |
| A2 | VIN | Main power input-accepts 2.3–5.5 V; requires local 2.2 µF ceramic capacitor placed adjacent to pin to suppress high-frequency switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Low-Ripple Light-Load PFM Mode | Delivers 24 µA IQ while maintaining tight output regulation and fast transient response-ideal for always-on system rails. |
| Forced PWM & External Sync | Eliminates frequency variation in noise-sensitive RF/analog sections; supports deterministic EMI filtering via fixed 6 MHz operation. |
| Internal Soft-Start | Controls output ramp rate (50 mV/µs to 1 V, then 12.5 mV/µs) to prevent inrush current and overshoot-no external components needed. |
| Optional Active Output Discharge | Not implemented in FAN53601UC182X-P (discharge disabled)-avoids unintended discharge path when EN is low. |
| Robust Protection Suite | Includes cycle-by-cycle current limiting, thermal shutdown (150°C), UVLO, and hiccup-mode fault recovery-reduces system-level reliability testing burden. |
Applications
| Tablet Core Logic Rail | Mobile Data Card SoC Supply |
|---|---|
|
Use Scenario: Powers ARM-based application processors in 7–10 inch tablets requiring stable 1.82 V core voltage under dynamic CPU/GPU load changes. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated core power; operates in auto PFM/PWM to balance efficiency and transient response. Use Value: Enables >90% efficiency at 300 mA and maintains <20 mV output deviation during 10–600 mA load steps-reducing thermal stress and battery drain. |
Use Scenario: Supplies baseband processor and RF transceiver in LTE/WiFi data cards where board area and EMI are critical constraints. IC Role / Device Role / Timing Role: Compact point-of-load regulator with 6 MHz switching-minimizes filter component size and avoids interference with cellular bands. Use Value: 470 nH inductor + 4.7 µF capacitor solution occupies <12 mm² total area; forced PWM mode ensures consistent switching frequency for predictable EMI filtering. |
| Digital Still Camera Sensor Bias | Ultra-Mobile PC Memory Interface |
|
Use Scenario: Provides clean, low-noise 1.82 V bias for CMOS image sensor analog front-end and ADC reference in compact DSCs. IC Role / Device Role / Timing Role: Low-ripple power source with PFM disabled via MODE pin-eliminates variable-frequency switching noise near sensitive analog circuits. Use Value: Achieves <15 mVpp output ripple at 200 mA (Figure 16), preserving SNR in high-resolution imaging pipelines. |
Use Scenario: Powers DDR/LPDDR I/O rails in fanless ultra-mobile PCs where thermal headroom and standby power are tightly constrained. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in PFM mode during system idle-reducing system-wide quiescent power. Use Value: Maintains >85% efficiency at 10 mA load, cutting standby current by >40% versus conventional 2 MHz regulators-extending battery life in suspend states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2143GQ-Z | 3 MHz switching, 1 A output, 2.5–5.5 V input, 28 µA IQ, QFN-10 package (2 mm × 2 mm). | Lower switching frequency increases inductor/capacitor size; higher current rating suits future-proofing but adds cost and thermal margin. | Choose MP2143GQ-Z if board layout allows larger passives and higher current headroom is needed beyond 600 mA. |
| TPS62231DRVR | 3 MHz, 600 mA, 2.05–6.0 V input, 17 µA IQ, WSON-6 (2 mm × 2 mm), fixed 1.8 V output. | 1.8 V output differs by 20 mV vs. FAN53601UC182X-P's 1.82 V; lower IQ but lacks MODE pin sync capability. | Choose TPS62231DRVR only if 1.8 V tolerance is acceptable and external clock synchronization is unnecessary. |
Compared with MP2143GQ-Z and TPS62231DRVR, the FAN53601UC182X-P offers superior high-frequency operation (6 MHz) for minimal passive size, exact 1.82 V output matching legacy designs, and unique MODE-pin flexibility-making it optimal for space- and noise-constrained mobile applications where 600 mA is sufficient.
Availability
FAN53601UC182X-P is available at Aetrix Electronics and suitable for tablet power management, mobile data card SoC supplies, and ultra-mobile PC memory interface rails requiring stable component supply, long-term lifecycle support, and guaranteed WLCSP-6 sourcing.
Supply support for FAN53601UC182X-P 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 (now part of ON Semiconductor) is a global leader in power management and analog ICs, specializing in high-efficiency, miniaturized solutions for portable and battery-powered electronics.
The FAN53601/53611 product line was designed specifically for ultra-compact, high-switching-frequency DC-DC conversion in smartphones, tablets, and wireless data modules-emphasizing minimal bill-of-materials, low quiescent power, and robust transient performance.
FAQ
What is the output voltage tolerance of the FAN53601UC182X-P over temperature and load?
The FAN53601UC182X-P delivers a fixed 1.82 V output with ±3.8% accuracy (1.755 V to 1.885 V) across full load range (0–600 mA) and operating temperature (–40°C to +85°C), as specified in the Electrical Characteristics table under VO parameter for 1.820 V option. This tolerance includes line, load, and temperature effects-no external feedback resistors are used or required.
Does the FAN53601UC182X-P support external clock synchronization, and what frequency range is accepted?
Yes, the FAN53601UC182X-P supports external clock synchronization via the MODE pin. When driven with a square wave between 1.3 MHz and 1.7 MHz, the device synchronizes its internal 6 MHz switching frequency to exactly four times the input clock frequency. This capability enables deterministic EMI reduction and coexistence with other high-speed digital clocks in dense PCB layouts.
Is active output discharge enabled on the FAN53601UC182X-P, and how does it affect shutdown behavior?
No, active output discharge is disabled on the FAN53601UC182X-P (as indicated by "No" in the Ordering Information table for "Active Discharge"). During shutdown (EN < 0.4 V), the FB pin is left floating-no intentional discharge path is activated. Designers must provide external discharge circuitry if rapid VOUT decay is required after disable.
What are the minimum recommended external components for a basic FAN53601UC182X-P application?
The minimum recommended components are: a 470 nH shielded inductor (e.g., Murata LQM21PNR47MC0), a 2.2 µF X5R 0402 input capacitor placed adjacent to VIN/GND, and a 4.7 µF X5R 0402 output capacitor. These values enable full 6 MHz operation, meet ripple and transient requirements, and fit within the compact WLCSP-6 footprint constraints outlined in the Applications Information section.
How does the FAN53601UC182X-P handle thermal overload, and what is the shutdown hysteresis?
The FAN53601UC182X-P activates thermal shutdown at a nominal junction temperature of 150°C, disabling switching until the die cools by at least 15°C (hysteresis). Once below 135°C, normal operation resumes automatically. This protection prevents permanent damage during sustained overload or inadequate PCB thermal design-verified per JEDEC JESD51 thermal characterization.
FAN53601UC182X-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- 1.82V
- Voltage - Output (Max):
- -
- Current - Output:
- 600mA
- 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)
FAN53601UC182X-P FAQ
1.How can I place an order for FAN53601UC182X-P through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53601UC182X-P 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 FAN53601UC182X-P reliable?
The price and inventory of FAN53601UC182X-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53601UC182X-P is usually 5 days.
3.What payment methods are accepted for FAN53601UC182X-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53601UC182X-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53601UC182X-P?
FAN53601UC182X-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53601UC182X-P 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 FAN53601UC182X-P?
For technical support, including FAN53601UC182X-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53601UC182X-P requirements.
6.How does Aetrix verify that FAN53601UC182X-P is sourced from the original manufacturer or authorized distributors?
All FAN53601UC182X-P 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 FAN53601UC182X-P meets industry standards.
7.What is the process for return or replacement of FAN53601UC182X-P?
All FAN53601UC182X-P units undergo pre-shipment inspection (PSI). If there is an issue with FAN53601UC182X-P, 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 FAN53601UC182X-P part is unused and in its original packaging.
Return procedure for FAN53601UC182X-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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