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onsemi FAN53601UC182X
- Part No.:
- FAN53601UC182X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53601UC182X.pdf
- Description:
- IC REG BUCK 1.82V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:5,940
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Product details
Overview
FAN53601UC182X from onsemi is a 6 MHz, 600 mA synchronous buck regulator delivering a fixed 1.82 V output from 2.3–5.5 V input, featuring 24 µA quiescent current in PFM mode, internal soft-start, and UVLO protection. It targets power rails for application processors and memory in space-constrained portable electronics.
For engineers reviewing the FAN53601UC182X datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, WLCSP-6 package layout guidance, load-transient performance data, and validated alternative options for low-voltage, high-efficiency DC-DC conversion in mobile and embedded systems.
Technical Context
The FAN53601UC182X employs a proprietary non-linear fixed-frequency PWM modulator with seamless auto-switching between PWM and PFM modes, enabling stable 6 MHz operation down to 1 mA load while maintaining >80% efficiency. Its synchronous rectification architecture uses integrated PMOS/NMOS switches with 175 mΩ/165 mΩ RDS(on) to minimize conduction loss.
Control is implemented via voltage-mode regulation with external feedback (FB pin), MODE pin–enabled forced-PWM or synchronization to 1.3–1.7 MHz external clocks, and EN pin–controlled startup with 300 µs soft-start ramp. Thermal shutdown activates at 150°C with 15°C hysteresis, and over-current protection triggers after 16 current-limit cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.820 V ±3.6% (1.755–1.885 V) across 0–600 mA load and –40°C to +85°C. |
| Max Output Current | 600 mA continuous; peak current limit 900–1250 mA (open-loop test condition). |
| Switching Frequency | 6.0 MHz nominal in PWM mode; supports external sync up to 1.7 MHz on MODE pin. |
| Quiescent Current | 24 µA typical in PFM mode; drops to <1 µA in shutdown (EN = GND). |
| Input Voltage Range | 2.3 V to 5.5 V; UVLO threshold 2.27 V with 200 mV hysteresis. |
| Efficiency | Peak 92% at 3.6 VIN/1.82 VOUT; >80% maintained down to 1 mA load. |
| Package | 6-bump Wafer-Level Chip-Scale Package (WLCSP), 0.4 mm pitch, 1.16 × 0.86 mm footprint. |
Pinout & Package
Package: 6-bump WLCSP (0.4 mm pitch), dimensions 1.16 mm × 0.86 mm, typical height 586 µm. Bumps face down in standard mounting; land pattern requires NSMD pads with 0.26 mm diameter solder mask opening.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Logic-controlled mode selection: HIGH forces PWM; LOW enables auto PFM/PWM switching; also accepts sync clock (×4 multiplication). |
| B1 | SW | Switching node: connects directly to inductor; carries high di/dt pulsed current; requires low-inductance routing. |
| C1 | FB | Feedback input: senses output voltage via resistive divider (not used for fixed-output FAN53601UC182X); tied internally to set 1.82 V reference. |
| C2 | GND | Power and signal ground: primary return path for SW, VIN, and internal circuits; must connect to solid ground plane under IC. |
| B2 | EN | Enable input: active HIGH (>1.2 V); device enters shutdown (<0.4 V); internal pull-down absent-must be driven. |
| A2 | VIN | Main power input: supplies internal circuitry and high-side switch; requires local 2.2 µF ceramic capacitor placed adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 24 µA in light-load PFM mode preserves battery life in always-on subsystems without sacrificing transient response. |
| 6 MHz fixed-frequency operation | Enables use of tiny 470 nH inductors and 4.7 µF output capacitors, reducing solution size by >40% vs. 1–2 MHz converters. |
| Seamless PFM/PWM transition | Eliminates output voltage discontinuity during load changes; maintains regulation stability across 1 mA to 600 mA range. |
| Internal soft-start | 300 µs controlled ramp prevents inrush current and output overshoot during power-up, even with large COUT. |
| Synchronous rectification | Integrated 175 mΩ PMOS / 165 mΩ NMOS switches replace external diode, increasing efficiency by 8–12% at medium loads. |
Applications
| Mobile Application Processor Core Rail | LPDDR Memory I/O Supply |
|---|---|
Use Scenario: Powers ARM Cortex-A series CPU cores in smartphones and tablets requiring tight voltage tolerance and fast load-step response. IC Role / Device Role / Timing Role: Primary step-down regulator delivering stable 1.82 V at up to 600 mA with <100 ns load transient recovery. Use Value: Maintains 92% peak efficiency and <±1.5% output regulation across temperature, enabling longer battery runtime and thermal margin. |
Use Scenario: Supplies I/O voltage for LPDDR2/LPDDR3 memory interfaces where low noise and minimal ripple are critical for signal integrity. IC Role / Device Role / Timing Role: Low-ripple DC-DC converter operating in forced PWM mode to suppress switching noise near high-speed data lanes. Use Value: Delivers <15 mVpp output ripple at 600 mA (5.0 VIN), meeting JEDEC AC timing margins for 400+ MHz memory buses. |
| Wi-Fi/Bluetooth SoC Power Domain | Portable DSC/DVC Image Sensor Bias |
Use Scenario: Powers dual-band Wi-Fi 6/Bluetooth 5.0 combo chips in compact IoT modules with bursty RF transmit current demands. IC Role / Device Role / Timing Role: High-efficiency buck regulator supporting dynamic voltage scaling during RF transmit/receive duty cycles. Use Value: Achieves >85% efficiency at 10–100 mA loads and recovers from 10→200 mA transients in <5 µs, minimizing RF interference. |
Use Scenario: Supplies clean, regulated bias to CMOS image sensors in digital still/video cameras where analog noise directly impacts SNR. IC Role / Device Role / Timing Role: Low-noise, low-ESR power source with PSRR >50 dB at 100 kHz, decoupled via 4.7 µF X5R ceramic capacitor. Use Value: Reduces sensor readout noise floor by 3–5 dB compared to LDO-based solutions, improving low-light image quality. |
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 | Fixed 1.8 V output, 600 mA, 3.6 MHz switching, 22 µA IQ, WSON-6 package (2.0 × 2.0 mm). | Larger footprint (+230% area), lower switching frequency limits min inductor size to 1 µH. | Choose when board layout allows larger package and lower EMI sensitivity permits reduced switching frequency. |
| RT8059GJ6 | Adjustable 0.6–3.3 V output, 600 mA, 3 MHz, 28 µA IQ, WDFN-6 (1.5 × 1.5 mm). | Requires external feedback resistors; no MODE pin sync capability; lacks PFM/PWM auto-transition logic. | Choose when output voltage flexibility is required and system-level clock synchronization is unnecessary. |
Compared with TPS62231DRYR and RT8059GJ6, the FAN53601UC182X offers superior power density (1.0 mm² WLCSP), higher 6 MHz switching for smaller passives, and autonomous light-load efficiency optimization-making it optimal for ultra-compact, battery-sensitive designs where fixed 1.82 V is acceptable.
Availability
FAN53601UC182X is available at Aetrix Electronics and suitable for mobile SoC core rails, LPDDR memory supplies, Wi-Fi/Bluetooth power domains, and portable imaging sensor bias requiring stable component supply and long-term production continuity.
Supply support for FAN53601UC182X 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 FAN53601UC182X belongs to onsemi's high-frequency synchronous buck regulator product line, engineered specifically for space-constrained portable electronics demanding ultra-small footprint, high efficiency across wide load ranges, and robust transient performance.
FAQ
What is the output voltage tolerance of the FAN53601UC182X over full load and temperature?
The FAN53601UC182X delivers a fixed 1.820 V output with ±3.6% tolerance (1.755–1.885 V) across 0–600 mA load and –40°C to +85°C ambient. In PWM mode only, tolerance tightens to ±1.6% (1.781–1.859 V). This is verified per Electrical Characteristics Table on page 4 of the official datasheet (Rev. 2, Dec-2017).
Does the FAN53601UC182X require external feedback resistors to set its output voltage?
No. The FAN53601UC182X is a fixed-output device with internal feedback network configured for 1.820 V. The FB pin is not user-accessible for adjustment; it is internally connected to the reference and should remain unconnected in standard operation. External resistors are unnecessary and would disrupt regulation.
How does the MODE pin function on the FAN53601UC182X, and what happens if left floating?
The MODE pin on the FAN53601UC182X controls operating mode: logic HIGH forces continuous PWM; logic LOW enables automatic PFM/PWM transition; and 1.3–1.7 MHz square wave input synchronizes switching to 4× that frequency. It must not be left floating-internal Schmitt trigger prevents noise susceptibility, but undefined logic level may cause erratic mode behavior or increased EMI.
What is the minimum recommended output capacitor for stable operation of the FAN53601UC182X?
The minimum recommended output capacitor is 1.6 µF (ceramic, X5R/X7R), though 4.7 µF is specified for typical application. Performance scales with capacitance: 4.7 µF yields <15 mVpp ripple at 600 mA and improves load transient response. Capacitance below 1.6 µF risks instability and excessive ripple, especially at high load currents or low input voltages.
Can the FAN53601UC182X safely operate with a 2.3 V input supply at full 600 mA load?
Yes, the FAN53601UC182X is rated for 2.3–5.5 V input and supports 600 mA at 2.3 VIN, but switching frequency drops below 6 MHz under heavy load due to tOFF(MIN) limitation. At 2.3 VIN/1.82 VOUT, frequency falls to ~4.5 MHz at 600 mA (per Figure 34), reducing efficiency by ~3–5% versus 3.6 VIN operation.
FAN53601UC182X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- 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 FAQ
1.How can I place an order for FAN53601UC182X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53601UC182X 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 reliable?
The price and inventory of FAN53601UC182X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53601UC182X is usually 5 days.
3.What payment methods are accepted for FAN53601UC182X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53601UC182X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53601UC182X?
FAN53601UC182X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53601UC182X 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?
For technical support, including FAN53601UC182X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53601UC182X requirements.
6.How does Aetrix verify that FAN53601UC182X is sourced from the original manufacturer or authorized distributors?
All FAN53601UC182X 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 meets industry standards.
7.What is the process for return or replacement of FAN53601UC182X?
All FAN53601UC182X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53601UC182X, 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 part is unused and in its original packaging.
Return procedure for FAN53601UC182X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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