My Inquiry
My Account
onsemi FAN53601AUC105X
- Part No.:
- FAN53601AUC105X
- Manufacturer:
- onsemi
- Package:
- 6-UFBGA, WLCSP
- Datasheet:
-
FAN53601AUC105X.pdf
- Description:
- IC REG BUCK 1.05V 600MA 6WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,337
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FAN53601AUC105X from onsemi is a 6 MHz, 600 mA synchronous buck regulator delivering a fixed 1.050 V output from 2.3–5.5 V input, featuring 24 µA quiescent current in PFM mode, internal soft-start, and active output discharge-designed for power management in compact portable electronics such as tablets and data cards.
For engineers reviewing the FAN53601AUC105X datasheet, pinout, applications, or equivalent options, key selection criteria include its 6-bump WLCSP-6 (0.4 mm pitch) package, forced-PWM/external sync capability via MODE pin, UVLO threshold of 2.27 V, thermal shutdown at 150°C, and compatibility with 470 nH inductors and 4.7 µF ceramic output capacitors.
Technical Context
The FAN53601AUC105X employs a proprietary non-linear fixed-frequency PWM modulator with seamless auto-transition between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) PFM, enabling stable regulation across 1 mA to 600 mA loads while maintaining 92% peak efficiency. Its architecture eliminates ESR dependency, supporting low-ESR ceramic capacitors without loop compensation.
Control logic integrates a Schmitt-triggered MODE pin that enables forced PWM operation or external clock synchronization at 1.3–1.7 MHz (yielding 5.2–6.8 MHz switching), alongside EN-controlled startup with exponential soft-start ramping and displacement-current-limited inrush protection. Thermal shutdown activates at 150°C with 15°C hysteresis, and over-current protection triggers hiccup-mode restart after 16 current-limit cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.050 V ±4.7% (0–600 mA load, PWM mode); ensures precise core voltage for low-power processors and RF ICs. |
| Max Output Current | 600 mA continuous; supports mid-tier SoC cores, PMIC rails, and peripheral I/O supplies in space-constrained designs. |
| Switching Frequency | 6 MHz nominal (5.4–6.6 MHz range); enables ultra-small 470 nH inductors and 4.7 µF output capacitors, minimizing PCB footprint. |
| Quiescent Current | 24 µA typical in PFM mode; extends battery life in always-on subsystems like sensor hubs and modem standby states. |
| Input Voltage Range | 2.3 V to 5.5 V; compatible with single-cell Li-ion (2.7–4.2 V), USB-powered (5 V), and wide-input PMIC outputs. |
| UVLO Threshold | 2.27 V rising; prevents erratic startup during brown-out conditions and ensures clean enablement above minimum battery voltage. |
| Thermal Shutdown | 150°C activation with 15°C hysteresis; protects die under sustained overload or poor thermal layout without requiring external monitoring. |
| Output Discharge | Enabled (230 Ω path to GND when EN = LOW); eliminates residual voltage on VOUT during shutdown, critical for sequencing-sensitive systems. |
Pinout & Package
Package: 6-bump Wafer-Level Chip-Scale Package (WLCSP-6), 0.4 mm pitch, 1.16 mm × 0.86 mm footprint, 586 µm typical height (547–625 µm range), bottom-side solder bumps with NSMD land pattern.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | MODE | Configures operating mode: logic HIGH forces fixed-frequency PWM; logic LOW enables auto PFM/PWM transition; also accepts 1.3–1.7 MHz sync signal (×4 multiplication). |
| B1 | SW | Switching node connection to inductor; carries high di/dt pulsed current; requires short, low-inductance trace to minimize EMI and voltage spikes. |
| C1 | FB | Feedback input tied directly to output capacitor; sets regulated voltage via internal 1.050 V reference; no external resistor divider needed. |
| C2 | GND | Power and signal ground reference; must be connected to low-impedance PCB plane adjacent to CIN/COUT common node. |
| B2 | EN | Enable control: >1.2 V enables regulation with soft-start; <0.4 V disables device and activates output discharge; floating prohibited. |
| A2 | VIN | Main input supply (2.3–5.5 V); requires local 2.2 µF ceramic capacitor placed within 2 mm of pin to suppress high-frequency ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Best-in-class light-load efficiency | 80%+ efficiency at 1 mA load due to 24 µA quiescent current and DCM PFM architecture-critical for IoT sleep modes. |
| Ultra-fast load transient response | Sub-10 µs recovery from 10–200–10 mA steps without external compensation-enables dynamic voltage scaling for burst-mode processors. |
| Integrated soft-start with inrush limiting | Exponential ramp (50 mV/µs to 1 V, then 12.5 mV/µs) plus cycle-by-cycle current limit prevents overshoot and startup failure into large COUT. |
| External clock synchronization | MODE pin accepts 1.3–1.7 MHz square wave to lock switching frequency to 5.2–6.8 MHz-eliminates beat frequencies in multi-rail systems. |
| Active output discharge | 230 Ω internal path discharges FB to GND when EN = LOW-ensures safe, rapid rail collapse for power sequencing compliance. |
| Robust fault protection | Combined thermal shutdown (150°C), hiccup-mode over-current (16-cycle limit), and UVLO prevent damage during faults or miswiring. |
Applications
| Mobile Data Cards | Tablets |
|---|---|
Use Scenario: Powering baseband processors and RF transceivers in LTE/WiMAX data dongles with aggressive size constraints and battery runtime targets. IC Role / Device Role / Timing Role: Primary 1.05 V core supply regulator delivering tightly regulated voltage with minimal ripple and fast transient response to handle bursty data traffic. Use Value: Enables use of 470 nH inductors and 4.7 µF ceramic capacitors-reducing total solution area by >40% versus legacy 1–2 MHz buck converters. |
Use Scenario: Supplying application processor I/O or GPU voltage rails in 7–10 inch tablets where thermal density and standby power are critical. IC Role / Device Role / Timing Role: Secondary buck regulator providing dynamically scaled 1.05 V rail synchronized to system clock via MODE pin to avoid interference with display or audio subsystems. Use Value: 24 µA quiescent current extends standby time beyond 14 days; active discharge ensures clean power-down for secure boot integrity. |
| Digital Still Cameras | Ultra-Mobile PCs |
Use Scenario: Powering image signal processors (ISPs) and CMOS sensors in compact DSCs requiring low-noise, low-ripple 1.05 V supply during high-speed capture. IC Role / Device Role / Timing Role: Low-EMI buck regulator operating in forced PWM mode (MODE = HIGH) to eliminate PFM noise during exposure and readout phases. Use Value: 6 MHz fixed frequency shifts switching noise beyond sensitive analog bands (e.g., 1–10 MHz ISP clock domains), improving SNR by ≥3 dB. |
Use Scenario: Regulating memory interface voltage (e.g., LPDDR I/O) in fanless UMPCs where thermal headroom is limited and ambient temperature exceeds 70°C. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with thermal shutdown (150°C) and 125°C/W junction-to-ambient resistance-maintaining regulation under sustained CPU load. Use Value: Delivers 92% peak efficiency at 600 mA, reducing heat generation by 350 mW versus 85% efficient alternatives-delaying thermal throttling by >2 minutes. |
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 | 1.05 V fixed output, 600 mA, 3.6 MHz, 22 µA IQ, WSON-6 (2 mm × 2 mm) | Larger 2 mm × 2 mm package vs. FAN53601AUC105X's 1.16 mm × 0.86 mm WLCSP; lacks external sync and active discharge. | Choose TPS62231DRYR if board space allows larger footprint and sync/discharge features are unnecessary. |
| RT7295BGJ6F | 1.05 V fixed output, 600 mA, 2 MHz, 35 µA IQ, TSOT-23-6 | Lower 2 MHz frequency requires larger 2.2 µH inductor and 10 µF capacitor; higher IQ reduces battery life in always-on use cases. | Choose RT7295BGJ6F only for cost-sensitive designs where 6 MHz size/efficiency benefits are secondary to BOM cost. |
Compared with TPS62231DRYR and RT7295BGJ6F, the FAN53601AUC105X delivers superior miniaturization (6-bump WLCSP), lower quiescent current, and unique features including external clock synchronization and active output discharge-making it optimal for next-generation portable devices where PCB area, battery life, and power sequencing are critical.
Availability
FAN53601AUC105X is available at Aetrix Electronics and suitable for mobile data cards, tablets, digital still cameras, and ultra-mobile PCs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for FAN53601AUC105X 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 manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and portable electronics.
The FAN53601AUC105X belongs to onsemi's high-frequency synchronous buck regulator product line, engineered specifically for space-constrained, battery-powered applications demanding ultra-small passive components, low IQ, and robust protection features.
FAQ
What is the output voltage tolerance of the FAN53601AUC105X under full load?
The FAN53601AUC105X delivers 1.050 V with ±4.7% accuracy (1.003 V to 1.097 V) across 0–600 mA load at TA = –40°C to +85°C in AUTO mode. In forced PWM mode, tolerance tightens to ±3.2% (1.016 V to 1.084 V). This specification is validated per the onsemi datasheet Rev. 2, Section "Electrical Characteristics".
Does the FAN53601AUC105X require external feedback resistors?
No, the FAN53601AUC105X is a fixed-output regulator with an internal 1.050 V reference connected directly to the FB pin. The FB pin must be tied to the output capacitor node without any external resistor divider-simplifying layout and eliminating resistor tolerance errors. This is confirmed in the "Pin Definitions" and "Typical Application" sections of the datasheet.
How does the MODE pin function in the FAN53601AUC105X?
The MODE pin on the FAN53601AUC105X serves three functions: (1) logic HIGH forces fixed-frequency PWM operation; (2) logic LOW enables automatic PFM/PWM mode switching; (3) a 1.3–1.7 MHz square wave input synchronizes switching to 5.2–6.8 MHz. It includes internal Schmitt triggering for noise immunity, as specified in the "Pin Definitions" and "Operation Description" sections.
What is the maximum recommended output capacitance for stable operation of the FAN53601AUC105X?
The FAN53601AUC105X supports output capacitances up to 12.0 µF without compromising stability, as stated in the "Recommended Operating Conditions" table. Increasing COUT beyond the typical 4.7 µF improves transient response and reduces output ripple but does not affect loop compensation-enabling design flexibility for varying load dynamics.
Is the FAN53601AUC105X RoHS-compliant and halogen-free?
Yes, the FAN53601AUC105X is RoHS-compliant and halogen-free per onsemi's material declarations and packaging specifications. The WLCSP-6 package uses lead-free solder bumps and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), verified in the "Physical Dimensions" and compliance documentation referenced in the datasheet.
FAN53601AUC105X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-UFBGA, WLCSP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- 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):
- 1.05V
- 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)
FAN53601AUC105X FAQ
1.How can I place an order for FAN53601AUC105X through Aetrix?
Please submit a Request for Quotation (RFQ) for FAN53601AUC105X 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 FAN53601AUC105X reliable?
The price and inventory of FAN53601AUC105X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FAN53601AUC105X is usually 5 days.
3.What payment methods are accepted for FAN53601AUC105X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FAN53601AUC105X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FAN53601AUC105X?
FAN53601AUC105X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FAN53601AUC105X 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 FAN53601AUC105X?
For technical support, including FAN53601AUC105X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FAN53601AUC105X requirements.
6.How does Aetrix verify that FAN53601AUC105X is sourced from the original manufacturer or authorized distributors?
All FAN53601AUC105X 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 FAN53601AUC105X meets industry standards.
7.What is the process for return or replacement of FAN53601AUC105X?
All FAN53601AUC105X units undergo pre-shipment inspection (PSI). If there is an issue with FAN53601AUC105X, 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 FAN53601AUC105X part is unused and in its original packaging.
Return procedure for FAN53601AUC105X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FAN53601AUC105X 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…
