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onsemi NCV8570SN28T1G
- Part No.:
- NCV8570SN28T1G
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
NCV8570SN28T1G.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
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Inventory:6,000
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Product details
Overview
NCV8570SN28T1G from onsemi is a 200 mA ultra-low-noise, high-PSRR BiCMOS LDO regulator delivering a precise 2.8 V output for RF-sensitive power domains. It features 15 µVrms output noise (typ), 80 dB PSRR at 1 kHz, and dropout voltage of 105 mV at 150 mA - optimized for satellite radio, automotive infotainment, and precision instrumentation.
For engineers reviewing the NCV8570SN28T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, TSOP-5 package compatibility, active discharge circuit, and Cnoise pin support for configurable noise filtering in battery-powered RF subsystems.
Technical Context
The NCV8570SN28T1G integrates a bipolar-based error amplifier and PMOS pass device within a BiCMOS process to simultaneously achieve low ground current (70 µA typ at 1 mA load) and ultra-low noise performance. Its bandgap reference node is externally accessible via the Cnoise pin, enabling direct bypassing to suppress reference-derived noise before amplification.
It implements logic-level chip enable (CE) with 0.4–1.2 V threshold, internal 5 MΩ pull-down, and active discharge that sinks output capacitance when disabled - ensuring fast, controlled turn-off without external components. Thermal shutdown (150 °C) and current limit (200 mA min) provide robust fault protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.8 V ±2% (1.764–1.836 V at 1 mA); maintains regulation across −40 °C to +85 °C ambient |
| Output Current | 200 mA continuous (min current limit); supports peak loads up to 310 mA before foldback |
| Noise (10 Hz–100 kHz) | 15 µVrms (typ) with 100 nF Cnoise capacitor; enables clean bias for RF power amplifiers |
| PSRR | 80 dB (typ) at 1 kHz; rejects switching noise from upstream DC/DC converters in mixed-signal systems |
| Dropout Voltage | 105 mV (typ) at 150 mA; allows operation from 2.905 V input while sustaining 2.8 V output |
| Quiescent Current | 70 µA (typ) at 1 mA load; reduces standby power in always-on automotive modules |
| Enable Threshold | 0.4 V (max low), 1.2 V (min high); compatible with 1.8 V/3.3 V GPIO without level-shifting |
Pinout & Package
NCV8570SN28T1G uses the TSOP-5 (Case 483) surface-mount package: 3.0 mm × 1.5 mm × 1.1 mm body, lead pitch 0.95 mm, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Main input supply (2.5–5.5 V); connects to upstream DC/DC or battery rail |
| 2 | GND | Power ground reference; fused internally for low-inductance return path |
| 3 | Vout | Regulated 2.8 V output; drives RF PA, ADC analog supply, or PLL VCO core |
| 4 | Cnoise | Noise reduction node; requires 10–100 nF capacitor to GND to suppress reference noise |
| 5 | CE | Chip enable input; <0.4 V disables regulator and activates active discharge; >1.2 V enables |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 15 µVrms (10 Hz–100 kHz) with 100 nF Cnoise cap - meets stringent RF PA supply requirements |
| High PSRR at audio frequencies | 80 dB at 1 kHz - suppresses ripple from buck converter switching harmonics |
| Active discharge circuit | Internally discharges Vout when CE = low; eliminates hold-up time and prevents latch-up in multi-rail sequencing |
| AEC-Q100 qualified | Grade 1 (−40 °C to +125 °C junction); certified for automotive infotainment and ADAS sensor power rails |
| Stable with ceramic capacitors | Works with ≥1 µF X7R/X5R ceramics (no ESR requirement); simplifies layout and reduces BOM count |
Applications
| Satellite Radio Power Amplifier | Automotive Infotainment Audio DAC Supply |
|---|---|
Use Scenario: Powers final-stage RF power amplifier in HD/satellite radio tuners where supply noise directly modulates carrier signal. IC Role / Device Role / Timing Role: Low-noise bias source for GaAs FET PA; provides stable 2.8 V under dynamic load transients. Use Value: 15 µVrms noise ensures EVM degradation <0.1% and adjacent channel leakage ratio (ACLR) compliance per DVB-S2 standards. |
Use Scenario: Supplies analog section of stereo audio DAC in automotive head units, co-located with noisy digital processors. IC Role / Device Role / Timing Role: Clean analog VDD for DAC reference and output buffer; decouples from 3.3 V system rail. Use Value: 80 dB PSRR at 1 kHz eliminates audible 1.2 MHz buck converter beat tones; THD+N remains <0.002%. |
| Precision Instrumentation Sensor Bias | GPS/GLONASS Front-End LNA Supply |
Use Scenario: Provides excitation voltage for high-resolution RTD or bridge sensors in automotive cabin air quality monitors. IC Role / Device Role / Timing Role: Ultra-stable 2.8 V reference-grade supply; minimizes offset drift in 24-bit ΣΔ ADC front-end. Use Value: ±2% output tolerance over temperature and 12 mV load regulation ensure <±0.05% measurement error across full operating range. |
Use Scenario: Powers low-noise amplifier (LNA) in GPS/GLONASS receiver modules embedded in telematics control units. IC Role / Device Role / Timing Role: Dedicated LNA VDD rail; isolated from noisy MCU and CAN transceiver supplies. Use Value: Cnoise pin enables 10 nF bypass to reduce phase noise floor by 3 dB, improving C/N0 by 1.2 dB-Hz in weak-signal acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79928DRVR | 200 mA, 2.8 V, 25 µVrms noise, 60 dB PSRR @ 1 kHz, SOT-23-5 package | Lacks Cnoise pin and active discharge; lower PSRR limits use in high-dynamic-range RF stages | Select when board space is constrained and PSRR >70 dB is sufficient; not recommended for satellite radio PA bias |
| MCP1703T-2802E/MB | 250 mA, 2.8 V, 30 µVrms noise, no Cnoise pin, thermal shutdown only (no current limit) | Higher noise and no active discharge increase risk of cross-talk in multi-rail automotive modules | Acceptable for cost-sensitive non-AEC-Q100 consumer audio; lacks automotive qualification and noise performance for precision RF |
Compared with TPS79928DRVR and MCP1703T-2802E/MB, the NCV8570SN28T1G delivers superior noise/PSRR performance and automotive-grade reliability - critical for RF power stages where 10 µVrms noise margin separates functional compliance from field failure.
Availability
NCV8570SN28T1G is available at Aetrix Electronics and suitable for satellite radio, automotive infotainment, and precision instrumentation requiring stable component supply with AEC-Q100 traceability and long-term production continuity.
Supply support for NCV8570SN28T1G 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 silicon solutions for automotive, industrial, cloud, and IoT applications.
The NCV8570 series belongs to onsemi's automotive-qualified power management portfolio, designed specifically to deliver ultra-clean, highly regulated voltage for RF and precision analog circuits in safety-critical vehicle systems.
FAQ
What is the maximum input voltage rating for the NCV8570SN28T1G?
The NCV8570SN28T1G has an absolute maximum input voltage (Vin) rating of 6 V. Operation above this level risks permanent damage. The recommended operating input range is 2.5 V to 5.5 V - sufficient to support 3.3 V or 4.2 V battery-backed systems while maintaining 105 mV dropout at full 150 mA load. Exceeding 5.5 V may degrade PSRR and increase thermal stress.
Does the NCV8570SN28T1G require an external capacitor on the Cnoise pin?
Yes, the NCV8570SN28T1G requires an external capacitor (10 nF to 100 nF) between the Cnoise pin and GND to achieve specified noise performance. Without it, output noise rises from 15 µVrms to 20 µVrms. The capacitor must be placed close to the pin with short traces; X7R ceramics are recommended. Omitting this capacitor invalidates the ultra-low-noise claim in the NCV8570SN28T1G datasheet.
Is the NCV8570SN28T1G pin-compatible with other variants in the NCV8570 family?
Yes, all NCV8570 variants in the TSOP-5 package - including NCV8570SN18T1G, NCV8570SN25T1G, and NCV8570SN28T1G - share identical pinout, footprint, and electrical interface. Only the marked output voltage differs. This allows voltage-scaling flexibility during design-in or revision without PCB changes, provided thermal and load requirements remain within spec.
How does the active discharge feature work in the NCV8570SN28T1G?
When the CE pin is driven low, the NCV8570SN28T1G activates an internal NMOS transistor between Vout and GND, rapidly discharging output capacitance. This occurs without external components and reduces turn-off delay to <800 µs (at 1 mA load). The discharge current is sourced from Vout itself, keeping sleep-mode current below 1 µA - essential for automotive always-on modules meeting ISO 16750 quiescent power targets.
What thermal derating applies to the NCV8570SN28T1G in a standard 1 oz copper PCB layout?
In a standard 1 oz copper PCB with minimal thermal relief, the NCV8570SN28T1G exhibits a junction-to-ambient thermal resistance (RJA) of 220 °C/W. At 150 mA load and 5 V input, power dissipation is ~330 mW, resulting in ~73 °C junction rise above ambient. To stay within the 150 °C max junction limit, ambient must remain ≤77 °C - requiring either reduced load, enhanced copper area, or airflow in enclosed automotive enclosures.
NCV8570SN28T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
NCV8570SN28T1G FAQ
1.How can I place an order for NCV8570SN28T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8570SN28T1G 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 NCV8570SN28T1G reliable?
The price and inventory of NCV8570SN28T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8570SN28T1G is usually 5 days.
3.What payment methods are accepted for NCV8570SN28T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8570SN28T1G transactions.
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4.How is shipping managed for NCV8570SN28T1G?
NCV8570SN28T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8570SN28T1G 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 NCV8570SN28T1G?
For technical support, including NCV8570SN28T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8570SN28T1G requirements.
6.How does Aetrix verify that NCV8570SN28T1G is sourced from the original manufacturer or authorized distributors?
All NCV8570SN28T1G 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 NCV8570SN28T1G meets industry standards.
7.What is the process for return or replacement of NCV8570SN28T1G?
All NCV8570SN28T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8570SN28T1G, 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 NCV8570SN28T1G part is unused and in its original packaging.
Return procedure for NCV8570SN28T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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