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onsemi ILC6383CIR33X
- Part No.:
- ILC6383CIR33X
- Manufacturer:
- onsemi
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ILC6383CIR33X.pdf
- Description:
- IC REG BOOST 3.3V 1A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,719
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Product details
Overview
ILC6383CIR33X from Fairchild Semiconductor is a fixed 3.3V synchronous step-up DC-DC converter for single-to-three-cell battery inputs, delivering up to 375mA at 3.3V from 3V input, featuring true load disconnect in shutdown, 300kHz ±15% internal oscillator, and power-good (POK) output. It targets portable wireless devices requiring high efficiency and low-noise operation.
For engineers reviewing the ILC6383CIR33X datasheet, pinout, applications, or equivalent options, key selection criteria include startup voltage (0.9V), PFM/PWM mode selectability via SEL pin, ±3.5% output accuracy over –40°C to +85°C, and MSOP-8 package compatibility with space-constrained handheld designs.
Technical Context
The ILC6383CIR33X implements dual-mode control: PWM for noise-sensitive loads (fixed 300kHz switching) and PFM for light-load efficiency optimization, selected via SEL pin logic level. Its synchronous rectification eliminates external diode requirements and enables true load disconnect when LBI/SD is pulled low.
It integrates a 1.25V reference for low-battery detection (LBI/SD pin), open-drain POK flag with 92–98% VOUT threshold and 50mV hysteresis, and internal N- and P-channel MOSFETs with RDS(on) of 400mΩ and 750mΩ respectively - enabling efficient boost conversion from 0.9V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±3.5% over –40°C to +85°C - ensures stable rail for 3.3V logic and RF subsystems without external feedback components. |
| Input Voltage Range | 0.9V to 3.5V - supports single-cell Li-ion (2.7–4.2V), NiMH (0.9–1.4V/cell), and alkaline (0.9–1.5V/cell) sources across 1–3 cells. |
| Max Output Current | 375mA at 3.3V from 3V input - sufficient for GSM/GPRS baseband processors and display backlight drivers in compact form factors. |
| Oscillator Frequency | 300kHz ±15% - avoids audio band (<20kHz) and 455kHz IF band, minimizing EMI in cellular and pager RF sections. |
| Shutdown Input Current | 1µA typical with VOUT = 0V - prevents battery drain during system sleep, critical for multi-day standby in pagers and PDAs. |
| Efficiency | Peak >90% in PWM mode at 50mA - reduces thermal load and extends runtime in thermally constrained palmtop enclosures. |
| Startup Voltage | 0.9V in PWM mode - enables operation down to deeply discharged single-cell batteries, improving usable battery capacity. |
Pinout & Package
ILC6383CIR33X is housed in an 8-lead MSOP (Micro Small Outline Package) with 0.65mm pitch, 3.1mm × 4.65mm footprint, and exposed thermal pad (not electrically connected). Pin 1 is marked by a dot or beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 LX | Inductor switch node | Connects to inductor's high-side terminal; carries pulsed current up to 1A peak - requires low-inductance layout and Kelvin connection. |
| 2 VIN | Battery input | Direct connection to battery anode; accepts 0.9–3.5V; must be decoupled with ≥47µF ceramic capacitor near pin. |
| 3 LBI/SD | Low-battery detect input / shutdown control | Pulled low (<0.4V) forces shutdown and true load disconnect; threshold set externally via resistor divider - rejects transients <120ms. |
| 4 SEL | Mode select | Grounded → PFM mode (light-load efficiency); open/high → PWM mode (noise-controlled, full-load performance). |
| 5 POK | Power-good open-drain output | Sinks 2mA when VOUT is within 92–98% of 3.3V; requires external pull-up to enable system power sequencing or reset assertion. |
| 6 LBO | Low-battery open-drain output | Sinks 2mA when VIN falls below user-set LBI threshold; complements LBI/SD pin - used for battery status indication. |
| 7 GND | Power and signal ground | Must connect to low-impedance star ground point; separate from noisy power traces to minimize reference noise on LBI/SD and POK. |
| 8 VOUT | Regulated 3.3V output | Supplies downstream circuitry; requires ≥47µF low-ESR ceramic output capacitor placed within 6mm of pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Eliminates external Schottky diode - reduces forward drop losses and improves efficiency by ~5–8% versus diode-based boost converters. |
| User-selectable PFM/PWM mode | SEL pin configures operating mode: PFM extends battery life at <50mA loads; PWM maintains tight regulation and low ripple at full load. |
| True load disconnect in shutdown | LBI/SD <0.4V disables both switches and isolates VOUT from VIN - leakage <10µA prevents battery discharge during storage or deep sleep. |
| Integrated low-battery detector with transient rejection | 120ms hold time on LBI/SD ensures LBO only asserts after sustained low-voltage condition - prevents false triggers from RF burst current spikes. |
| Power-good (POK) flag with hysteresis | 50mV hysteresis prevents chatter during output settling; enables reliable microcontroller reset or enable sequencing in multi-rail systems. |
Applications
| Cellular Handsets | Wireless Pagers |
|---|---|
Use Scenario: Powering baseband processor and RF transceiver from single-cell Li-ion battery during transmit bursts. IC Role / Device Role / Timing Role: Step-up regulator providing stable 3.3V rail with fast transient response and minimal conducted EMI. Use Value: Enables operation down to 0.9V input, extending usable battery range by ~15% compared to non-synchronous alternatives. |
Use Scenario: Supplying 3.3V logic and LCD driver in ultra-low-power two-way pagers with intermittent receive duty cycle. IC Role / Device Role / Timing Role: High-efficiency PFM-mode boost converter active only during message decode windows. Use Value: Achieves >88% efficiency at 1mA load, reducing average quiescent current and enabling multi-week standby. |
| Palmtop PDAs | Portable Medical Monitors |
Use Scenario: Generating 3.3V for touchscreen controller and flash memory interface in battery-powered PDAs. IC Role / Device Role / Timing Role: Synchronous boost IC with true load disconnect, preventing backfeed into depleted battery during USB host charging. Use Value: Eliminates need for external reverse-blocking MOSFET or diode - saves PCB area and BOM cost in space-limited designs. |
Use Scenario: Providing regulated 3.3V for low-noise analog front-end and Bluetooth LE radio in wearable vital sign monitors. IC Role / Device Role / Timing Role: PWM-mode converter with 300kHz fundamental frequency - avoids interference with ECG/SpO₂ signal bands. Use Value: Delivers <10mVpp output ripple at 50mA, meeting EN ISO 14971 immunity requirements for Class II medical devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRVR | Higher 2MHz switching frequency; 95% peak efficiency; no integrated LBO; requires external feedback resistors even for fixed 3.3V. | Better suited for ultra-thin devices needing smaller inductors; lacks built-in low-battery detection and true shutdown disconnect. | Select when board space is critical and system already implements battery monitoring externally. |
| MAX17063ETA+ | Fixed 3.3V output; 1.2MHz operation; 1.8V min startup; includes thermal shutdown but no POK or LBO outputs. | Optimized for high-density consumer electronics; missing power sequencing and battery-status signaling features. | Choose when cost sensitivity outweighs need for POK/LBO flags and sub-1V startup capability. |
Availability
ILC6383CIR33X is available at Aetrix Electronics and suitable for cellular handsets, wireless pagers, palmtop PDAs, and portable medical monitors requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for ILC6383CIR33X 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 U.S.-based analog and power IC manufacturer focused on energy-efficient power management, signal conditioning, and interface solutions for consumer, industrial, and communications markets.
The ILC6383 series was designed specifically for battery-powered wireless communication devices - emphasizing ultra-low startup voltage, spectral-clean switching, and integrated system-level functions like POK and LBO to reduce external component count.
FAQ
What is the minimum input voltage required for ILC6383CIR33X to start up in PWM mode?
The ILC6383CIR33X guarantees startup in PWM mode at 0.9V input with 10mA load, as specified in the Electrical Characteristics table. This allows operation from deeply discharged single-cell alkaline or NiMH batteries, extending usable battery life beyond conventional boost converters requiring ≥1.8V startup.
Does ILC6383CIR33X support automatic mode switching between PFM and PWM?
No, ILC6383CIR33X does not auto-switch modes. The SEL pin must be externally controlled: tied to GND for forced PFM operation (optimal for <50mA loads), or left open/floating for forced PWM operation (recommended for noise-sensitive or high-current applications). No internal logic performs dynamic mode selection.
How is the power-good (POK) output of ILC6383CIR33X configured and used?
The POK pin (pin 5) is an open-drain output that pulls low until VOUT reaches 92–98% of 3.3V, then releases to allow external pull-up. It requires a pull-up resistor (typically 10kΩ to VOUT or system rail) to generate a logic-high signal for microcontroller reset or enable sequencing - ensuring downstream circuits power only when regulation is stable.
Can ILC6383CIR33X be used with a 5V input source?
No, ILC6383CIR33X has an absolute maximum VIN rating of 7V but is designed for 1–3-cell battery inputs (0.9–3.5V typical). Applying 5V exceeds recommended operating conditions and risks damage per Absolute Maximum Ratings. For 5V input, use a buck regulator or dedicated wide-input boost IC instead.
What is the purpose of the LBI/SD pin on ILC6383CIR33X, and how is it connected?
The LBI/SD pin (pin 3) serves dual functions: low-battery detection input and shutdown control. When pulled below 0.4V, it forces shutdown and true load disconnect. For battery monitoring, it connects to a resistor divider from VIN to set threshold (e.g., 2.8V cutoff); internal 1.25V reference compares against this voltage with 120ms hold time to reject transients.
ILC6383CIR33X 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
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1V
- Voltage - Input (Max):
- 3.8V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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
ILC6383CIR33X FAQ
1.How can I place an order for ILC6383CIR33X through Aetrix?
Please submit a Request for Quotation (RFQ) for ILC6383CIR33X 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 ILC6383CIR33X reliable?
The price and inventory of ILC6383CIR33X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ILC6383CIR33X is usually 5 days.
3.What payment methods are accepted for ILC6383CIR33X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ILC6383CIR33X transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ILC6383CIR33X?
ILC6383CIR33X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ILC6383CIR33X 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 ILC6383CIR33X?
For technical support, including ILC6383CIR33X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ILC6383CIR33X requirements.
6.How does Aetrix verify that ILC6383CIR33X is sourced from the original manufacturer or authorized distributors?
All ILC6383CIR33X 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 ILC6383CIR33X meets industry standards.
7.What is the process for return or replacement of ILC6383CIR33X?
All ILC6383CIR33X units undergo pre-shipment inspection (PSI). If there is an issue with ILC6383CIR33X, 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 ILC6383CIR33X part is unused and in its original packaging.
Return procedure for ILC6383CIR33X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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