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onsemi ILC7082AIM545X
- Part No.:
- ILC7082AIM545X
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
ILC7082AIM545X.pdf
- Description:
- IC REG LINEAR 4.5V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,883
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Product details
Overview
ILC7082AIM545X from Fairchild Semiconductor is a 150mA, fixed 4.5V output low-dropout (LDO) voltage regulator in SOT-23-5 package, featuring 1% output voltage accuracy, 40µVRMS output noise, and 85dB ripple rejection at 1kHz - designed for RF-sensitive portable power rails in cellular phones and wireless communicators.
For engineers reviewing the ILC7082AIM545X datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, validated pin functions, real-world transient response data, and confirmed alternative options for low-noise, high-PSRR LDO selection in battery-powered RF systems.
Technical Context
The ILC7082AIM545X implements a CMOS-based RF-LDO™ architecture with transconductance amplifier output stage and internal zero-pole compensation to stabilize operation with zero-ESR ceramic capacitors. Its bandgap-referenced error amplifier drives a high-impedance output stage, enabling ultra-low noise and high PSRR without requiring tantalum capacitors.
It integrates ON/OFF control with hysteresis, thermal shutdown at 170°C, and short-circuit protection delivering up to 600mA peak current. The device maintains regulation down to 150mV dropout at 150mA load and achieves <14mV dynamic line regulation with 2µs edge rates.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 4.5V ±1% - ensures stable bias for RF front-end ICs and PLL VCOs without external feedback network. |
| Max Output Current | 150mA continuous - sufficient for powering baseband processors, RF transceivers, or sensor subsystems in compact handheld devices. |
| Dropout Voltage | 200mV at 150mA load - enables operation from single-cell Li-ion (3.0–4.2V) or dual-cell NiMH while maintaining regulation. |
| Output Noise | 40µVRMS (300Hz–50kHz) - minimizes phase noise injection into sensitive RF receivers and local oscillators. |
| Ripple Rejection | 85dB at 1kHz, 60dB at 1MHz - suppresses switching noise from DC/DC converters feeding the LDO input rail. |
| Ground Current | 100µA at 100mA load - extends battery life in always-on monitoring or low-power sleep modes. |
| Operating Temp | –40°C to +85°C ambient - qualified for consumer and industrial portable electronics environments. |
Pinout & Package
ILC7082AIM545X is housed in an industry-standard 5-lead SOT-23 surface-mount package (JEDEC MO-178AA), with 1.3mm × 2.9mm footprint and 1.0mm max height - optimized for space-constrained PCB layouts in mobile applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply connection | Accepts 2V to 13V input; must be decoupled with ≥1µF ceramic capacitor close to pin to ensure stability and line transient immunity. |
| 2 - GND | Local ground reference | Return path for COUT and CNOISE; must be routed separately from main system ground plane to avoid noise coupling. |
| 3 - ON/OFF | Enable/disable control input | Logic-low ≤0.6V disables regulator (IQ < 2µA); logic-high ≥1.5V enables; includes hysteresis for noisy control signals. |
| 4 - CNOISE | Noise bypass terminal | High-impedance node for optional 0.01µF ceramic capacitor to reduce output noise further; not connected in basic configurations. |
| 5 - VOUT | Regulated output | Delivers fixed 4.5V; requires ≥1µF low-ESR ceramic capacitor between this pin and GND for stability and load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise architecture | 40µVRMS output noise enables clean power for RF receivers and VCOs without added filtering. |
| CMOS RF-LDO™ topology | Transconductance output stage with integrated pole-zero compensation ensures stability with zero-ESR ceramic capacitors. |
| High PSRR across frequency | 85dB @1kHz and 60dB @1MHz suppresses noise from switching regulators and digital ICs sharing the same input rail. |
| Low-quiescent-current shutdown | <2µA OFF-state current supports long-term battery storage and ultra-low-power wake-up architectures. |
| Robust protection suite | Thermal shutdown (170°C), short-circuit limiting (600mA peak), and overcurrent foldback prevent damage under fault conditions. |
Applications
| Cellular Phone Power Rail | Wireless Transceiver Bias |
|---|---|
|
Use Scenario: Supplies 4.5V bias to power amplifier (PA) driver stages and RF front-end ICs in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Low-noise post-regulator isolating PA bias from noisy DC/DC converter outputs. Use Value: 40µVRMS noise and 85dB PSRR prevent AM-to-PM distortion and adjacent-channel leakage in transmit paths. |
Use Scenario: Powers 2.4GHz Bluetooth/Wi-Fi transceiver ICs requiring stable, low-ripple 4.5V supply during burst-mode transmission. IC Role / Device Role / Timing Role: High-peak-current (500mA) LDO delivering regulated voltage during RF transmit bursts. Use Value: 150mV dropout at 150mA and fast load transient response (<40mV deviation) maintain VCO tuning stability during TX ramp-up. |
| PDA Baseband Processor Core | Portable Medical Sensor Module |
|
Use Scenario: Provides clean 4.5V supply to ARM9-based baseband processor core and memory interface in PDAs. IC Role / Device Role / Timing Role: Primary voltage regulator for digital subsystem, enabled via ON/OFF pin synchronized with processor sleep states. Use Value: 100µA ground current at full load and <2µA shutdown current extend runtime in intermittent-use applications. |
Use Scenario: Powers analog front-end (AFE) and low-power MCU in battery-operated ECG or pulse oximeter modules. IC Role / Device Role / Timing Role: Precision LDO ensuring stable reference for 16-bit ADCs and low-noise op-amps. Use Value: 1% initial accuracy and <±2% variation over –40°C to +85°C guarantee consistent signal chain gain and offset calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-4502E/MB | 4.5V fixed, 250mA, 18µVRMS noise, but only 65dB PSRR at 1kHz and requires minimum 2.2µF output capacitance. | Lacks CNOISE pin; less effective in ultra-low-noise RF biasing where >80dB PSRR above 100kHz is required. | Prefer ILC7082AIM545X when PSRR >80dB at 1MHz or CNOISE-based noise tailoring is needed. |
| TLS850F4V5BXTMA1 | Automotive-grade 4.5V LDO, 500mA, 45µVRMS, but higher 300mV dropout at 150mA and AEC-Q100 qualified. | Designed for automotive infotainment; over-specified for portable consumer use and lacks ON/OFF hysteresis. | Choose ILC7082AIM545X for cost-sensitive, space-constrained portable designs needing fast enable/disable control. |
Compared with MCP1703T-4502E/MB and TLS850F4V5BXTMA1, the ILC7082AIM545X uniquely balances ultra-low noise, high-frequency PSRR, and ON/OFF hysteresis in a 5-pin SOT-23 - making it optimal for RF-critical, battery-powered applications where layout area and transient immunity are constrained.
Availability
ILC7082AIM545X is available at Aetrix Electronics and suitable for cellular phone power rails, wireless transceiver biasing, and portable medical sensor modules requiring stable component supply with guaranteed long-term continuity.
Supply support for ILC7082AIM545X 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 U.S.-based analog and power IC manufacturer acquired by ON Semiconductor in 2016, known for high-performance LDOs, MOSFETs, and gate drivers targeting portable and industrial markets.
The ILC7082AIM545X belongs to Fairchild's RF-LDO™ product line, engineered specifically for noise-sensitive RF power domains in wireless communications - emphasizing low RMS noise, high PSRR, and ceramic-capacitor compatibility.
FAQ
What is the maximum input voltage rating for the ILC7082AIM545X?
The ILC7082AIM545X has an absolute maximum input voltage of +13.5V, with recommended operating range from (VOUT + VDO) to 13V - meaning it supports inputs up to 13V while delivering regulated 4.5V output. This allows direct use with 9V or 12V wall adapters or multi-cell battery packs when paired with appropriate thermal design.
Does the ILC7082AIM545X require an external capacitor on the CNOISE pin?
No - the CNOISE pin on the ILC7082AIM545X is optional. A 0.01µF ceramic capacitor may be added to reduce output noise further, but the device operates fully stably without it. If used, the capacitor must be low-leakage and placed close to the pin; connecting larger values slows ON/OFF response.
Can the ILC7082AIM545X be used with ceramic output capacitors?
Yes - the ILC7082AIM545X is explicitly designed for low-ESR ceramic capacitors (including X5R/X7R dielectrics), with stability guaranteed down to 0Ω ESR. Fairchild recommends ≥1µF ceramic COUT (e.g., 0805 or 1206 size) for optimal transient response and noise performance.
What protection features does the ILC7082AIM545X include?
The ILC7082AIM545X integrates overcurrent protection (600mA short-circuit limit), thermal shutdown (170°C trip, 160°C recovery), and ON/OFF hysteresis. It also features internal current limiting that prevents damage during sustained overload, enabling robust operation in portable systems with variable load profiles.
Is the ILC7082AIM545X pin-compatible with other ILC7082 variants?
Yes - all fixed-output versions of the ILC7082 in SOT-23-5 package (e.g., ILC7082AIM533X, ILC7082AIM528X) share identical pinout and footprint. The ILC7082AIM545X differs only in output voltage (4.5V), allowing drop-in replacement where 4.5V regulation is required without layout changes.
ILC7082AIM545X Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 13V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.3V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 220 µA
- Current - Supply (Max):
- 280 µA
- PSRR:
- 85dB ~ 60dB (1kHz ~ 1MHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
ILC7082AIM545X FAQ
1.How can I place an order for ILC7082AIM545X through Aetrix?
Please submit a Request for Quotation (RFQ) for ILC7082AIM545X 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 ILC7082AIM545X reliable?
The price and inventory of ILC7082AIM545X are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ILC7082AIM545X is usually 5 days.
3.What payment methods are accepted for ILC7082AIM545X?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ILC7082AIM545X transactions.
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4.How is shipping managed for ILC7082AIM545X?
ILC7082AIM545X orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ILC7082AIM545X 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 ILC7082AIM545X?
For technical support, including ILC7082AIM545X datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ILC7082AIM545X requirements.
6.How does Aetrix verify that ILC7082AIM545X is sourced from the original manufacturer or authorized distributors?
All ILC7082AIM545X 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 ILC7082AIM545X meets industry standards.
7.What is the process for return or replacement of ILC7082AIM545X?
All ILC7082AIM545X units undergo pre-shipment inspection (PSI). If there is an issue with ILC7082AIM545X, 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 ILC7082AIM545X part is unused and in its original packaging.
Return procedure for ILC7082AIM545X:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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