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onsemi ILC6363CIRADJX
- Part No.:
- ILC6363CIRADJX
- Manufacturer:
- onsemi
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ILC6363CIRADJX.pdf
- Description:
- IC REG BOOST ADJ 1A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,816
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Product details
Overview
ILC6363CIRADJX from Fairchild Semiconductor is an adjustable-output, synchronous step-up/step-down DC-DC converter optimized for single-cell Li-ion battery systems. It delivers up to 500mA output current, supports 2.5V–6.0V adjustable output voltage, operates at 300kHz ±15% fixed-frequency PWM or PFM mode, and features true load disconnect in shutdown (1µA input leakage). It is used in portable electronics requiring stable rail generation across varying battery voltages.
For engineers reviewing the ILC6363CIRADJX datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-mode control (PWM/PFM), internal synchronous rectification eliminating external diodes, low-battery detection with 100ms transient rejection, power-good flag, and MSOP-8 footprint compatibility with space-constrained handheld designs.
Technical Context
The ILC6363CIRADJX implements a hybrid buck-boost topology with automatic mode transition: it operates as a boost converter when VIN < VOUT − 0.8V, linearly tracks VIN when VIN exceeds VOUT by ≤800mV, and enters limited buck operation in PFM mode when VIN is up to 0.8V above VOUT. Its control architecture uses an internal 1.225V feedback reference (VFB) and supports user-selectable PWM (SEL open/high) or PFM (SEL low) operation.
It integrates dual MOSFET switches (N- and P-channel) with 400mΩ/750mΩ Rds(on), requires no external compensation, and achieves peak efficiency >90% at 3.6V output/300mA load. The device includes dedicated pins for low-battery detection (LBI/SD), power-good signaling (POK), and open-drain LBO output - all referenced to a 1.25V internal comparator threshold with 120ms hold time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 2.5V to 6.0V adjustable via external resistor divider; enables single-part support across multiple system rails. |
| Max Output Current | 500mA in PWM mode; sufficient for baseband processors, RF front-ends, and display bias in portable devices. |
| Oscillator Frequency | 300kHz ±15%; fixed switching frequency simplifies EMI filtering and avoids audible noise in audio-sensitive applications. |
| Peak Efficiency | >90% at VOUT = 3.6V, IOUT = 300mA, VIN = 3.6V; minimizes thermal stress and extends battery runtime in active use. |
| No-Load Input Current | 300µA; ultra-low quiescent current preserves battery life during standby or sleep modes. |
| Shutdown Input Leakage | 1µA typical; ensures true load disconnect and prevents battery drain when system is powered off. |
| Feedback Reference Voltage | 1.225V (typ), 1.212–1.288V (min/max); defines precision of output regulation and sets resistor-divider design constraints. |
Pinout & Package
ILC6363CIRADJX is housed in an 8-pin MSOP package (3.0mm × 3.0mm × 0.85mm, 0.65mm pitch) with exposed thermal pad. Pin 1 is marked by a dot; the package is RoHS-compliant and rated for −40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX | Inductor switch node | Connects to inductor; carries high-frequency pulsed current; requires low-inductance layout to minimize EMI and voltage spikes. |
| VIN | Battery input supply | Direct connection to Li-ion cell (0.9V–4.2V range); powers internal circuitry and switching stage. |
| LBI/SD | Low-battery detect input / shutdown control | Configurable threshold via resistor divider; logic-low (<0.4V) forces shutdown; enables battery monitoring and system-level power management. |
| SEL | Mode select input | Pull low for PFM (high-efficiency light-load operation); leave open or pull high for PWM (stable ripple, predictable EMI). |
| VFB | Feedback input | Monitors output via resistor divider; regulates VOUT to 1.225V at this pin; determines output voltage per VOUT = 1.225 × (1 + R1/R2). |
| LBO | Low-battery open-drain output | Sinks current when VIN falls below programmed threshold; 100ms hold time prevents false triggers from transient dips. |
| GND | Power and signal ground | Common return path for all currents; must be star-connected to minimize noise coupling into sensitive analog blocks. |
| VOUT | Regulated output voltage | Delivers final system rail; requires low-ESR/low-ESL ceramic capacitor (e.g., 100µF X5R) placed within 6mm of pins 7 and 8. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode; reduces conduction losses and improves efficiency by ~5–10% versus asynchronous designs. |
| Dual PWM/PFM operation | Enables dynamic mode switching: PFM for sub-50mA loads (maximizing light-load efficiency), PWM for >50mA (ensuring tight regulation and low ripple). |
| True load disconnect in shutdown | Isolates VOUT from VIN with <1µA leakage; prevents battery discharge during system hibernation or off-state. |
| Integrated low-battery detector | 1.25V reference-based comparator with 120ms hold time; provides reliable battery end-of-life signaling without external components. |
| Power-good (POK) flag | Open-drain output asserting when VOUT reaches 92–98% of nominal; used for processor reset sequencing and system power-on validation. |
Applications
| Cellular Phone Power Management | Handheld Medical Monitor |
|---|---|
Use Scenario: Regulating stable 3.3V or 3.6V rail from a single Li-ion cell (2.8V–4.2V) powering baseband IC and display driver. IC Role / Device Role / Timing Role: Primary DC-DC converter providing dynamically adjusted output voltage while maintaining regulation across full battery discharge curve. Use Value: Eliminates need for separate LDO post-regulation; sustains system operation down to 0.9V VIN startup and extends usable battery capacity by 12–15% versus fixed-topology solutions. |
Use Scenario: Generating clean 5.0V bias for analog front-end sensors and microcontroller peripherals in a battery-powered vital signs monitor. IC Role / Device Role / Timing Role: Adjustable buck-boost regulator delivering precise, low-noise supply with integrated POK for safe boot initialization. Use Value: Reduces BOM count by integrating low-battery warning and power-good signaling; meets medical-grade standby current requirements (<1µA shutdown leakage). |
| Industrial Handheld Scanner | Wearable Fitness Tracker |
Use Scenario: Supplying 3.0V to CMOS image sensor and laser driver in a ruggedized barcode scanner operating across wide temperature and battery voltage ranges. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC-DC converter supporting burst-mode imaging loads up to 500mA peak. Use Value: Maintains regulation during rapid load transients (e.g., laser pulse); MSOP-8 package fits compact PCB layouts; 206°C/W θJA enables operation at 85°C ambient without derating. |
Use Scenario: Providing regulated 2.8V supply to Bluetooth LE SoC and OLED display in a wrist-worn fitness tracker with strict size and power constraints. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current DC-DC converter enabling multi-day battery life in intermittent-sensing operation. Use Value: 300µA no-load current and PFM mode reduce average system power by 3× versus standard PWM-only converters during motion-sensing idle periods. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar adjustable-output buck-boost DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Higher 2A output capability; 2.5V–5.5V input; 1.2V–5.5V output; 2.4MHz switching; requires external compensation. | Targets higher-power applications (e.g., tablets); less suitable for ultra-low-IQ portable designs due to 30µA quiescent current. | Choose TPS63020DSJR when >500mA output or faster transient response is required; avoid if board space or standby current are critical. |
| MAX8815AETE+T | Fixed 3.3V/5.0V variants only; no adjustable version; 600mA output; 3MHz switching; integrated soft-start; 25µA IQ. | Designed for cost-sensitive, fixed-rail applications; lacks LBI/SD and POK functions; no true buck-boost tracking behavior. | Choose MAX8815AETE+T for simple, low-cost 3.3V/5.0V generation where adjustable output and battery monitoring are unnecessary. |
Compared with TPS63020DSJR and MAX8815AETE+T, the ILC6363CIRADJX uniquely balances adjustable output, ultra-low no-load current (300µA), integrated battery monitoring, and true load disconnect - making it optimal for space-constrained, battery-life-critical Li-ion portable systems where flexibility and efficiency coexist.
Availability
ILC6363CIRADJX is available at Aetrix Electronics and suitable for cellular phones, handheld medical monitors, industrial scanners, and wearable fitness trackers requiring stable component supply across extended production lifecycles.
Supply support for ILC6363CIRADJX 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 was a leading designer of high-performance analog and power ICs, acquired by ON Semiconductor in 2016; its legacy products remain widely deployed in portable and battery-powered systems.
The ILC6363 series was developed specifically for single-cell Li-ion applications demanding efficient, compact, and feature-rich DC-DC conversion - emphasizing low quiescent current, integrated protection, and seamless voltage transition across the battery discharge curve.
FAQ
What is the minimum input voltage required for ILC6363CIRADJX to start up?
The ILC6363CIRADJX has a minimum startup voltage of 0.9V in PWM mode, verified under 10mA load conditions. This allows reliable operation even as the Li-ion cell discharges near end-of-life, extending usable battery capacity. Startup behavior is confirmed in the Electrical Characteristics table on page 4 of the official datasheet revision 1.3.5.
How does the ILC6363CIRADJX handle input voltages that exceed the output voltage?
When VIN exceeds VOUT by ≤800mV, the ILC6363CIRADJX enters linear tracking mode - passing input voltage directly to the output with minimal dropout. If VIN exceeds VOUT by >800mV, it operates in standard boost mode. This behavior is explicitly documented in the Description section (page 1) and Figure 2 of the datasheet.
Can the ILC6363CIRADJX be used with ceramic output capacitors only?
Yes - the ILC6363CIRADJX is fully compatible with ceramic output capacitors. The datasheet recommends low-ESR/low-ESL ceramics (e.g., 100µF X5R) placed within 6mm of VOUT and GND pins. Tantalum caps may require a parallel 10µF ceramic to meet ripple specifications, but ceramics alone satisfy all stability and performance requirements.
What is the function of the SEL pin on the ILC6363CIRADJX?
The SEL pin selects between PFM (low-efficiency light-load) and PWM (fixed-frequency, low-ripple) operation: pulling SEL low enables PFM mode; leaving it open or applying ≥1.5V enables PWM mode. This dual-mode capability is detailed in the Pin Definitions (page 2) and Application Information (page 5) sections of the datasheet.
Does the ILC6363CIRADJX provide reverse current blocking during shutdown?
Yes - the ILC6363CIRADJX provides true load disconnect in shutdown mode, limiting input-to-output leakage to 1µA typical. This is achieved via internal MOSFET control that isolates VIN from VOUT, preventing battery drain when the system is powered off. The specification is confirmed in the Features list (page 1) and General Electrical Characteristics table (page 4).
ILC6363CIRADJX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 4.2V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ILC6363CIRADJX FAQ
1.How can I place an order for ILC6363CIRADJX through Aetrix?
Please submit a Request for Quotation (RFQ) for ILC6363CIRADJX 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 ILC6363CIRADJX reliable?
The price and inventory of ILC6363CIRADJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ILC6363CIRADJX is usually 5 days.
3.What payment methods are accepted for ILC6363CIRADJX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ILC6363CIRADJX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ILC6363CIRADJX?
ILC6363CIRADJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ILC6363CIRADJX 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 ILC6363CIRADJX?
For technical support, including ILC6363CIRADJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ILC6363CIRADJX requirements.
6.How does Aetrix verify that ILC6363CIRADJX is sourced from the original manufacturer or authorized distributors?
All ILC6363CIRADJX 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 ILC6363CIRADJX meets industry standards.
7.What is the process for return or replacement of ILC6363CIRADJX?
All ILC6363CIRADJX units undergo pre-shipment inspection (PSI). If there is an issue with ILC6363CIRADJX, 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 ILC6363CIRADJX part is unused and in its original packaging.
Return procedure for ILC6363CIRADJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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