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onsemi NCV8570SN18T1G
- Part No.:
- NCV8570SN18T1G
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
NCV8570SN18T1G.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
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Inventory:6,000
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Product details
Overview
NCV8570SN18T1G from onsemi is an automotive-grade 200 mA ultra-low-noise, high-PSRR BiCMOS LDO regulator delivering a precise 1.8 V output with 15 µVrms noise (typ), 80 dB PSRR (typ at 1 kHz), and 100 mV dropout at 150 mA - engineered for RF power amplifier biasing in satellite radios, infotainment systems, and GPS receivers.
For engineers reviewing the NCV8570SN18T1G datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (TSOP−5), validated pin functions including active-discharge Cnoise terminal, confirmed AEC−Q100 qualification, and real-world design trade-offs versus alternatives.
Technical Context
The NCV8570SN18T1G integrates a bipolar-based error amplifier and PMOS pass device in a BiCMOS process to simultaneously achieve ultra-low noise and low ground current (70 µA typ at 1 mA load). Its dedicated Cnoise pin provides direct access to the internal bandgap reference node, enabling external 10–100 nF capacitors to reduce output noise by up to 5 µVrms.
It features logic-controlled enable (CE) with 0.4 V/1.2 V thresholds, thermal shutdown at 150 °C with 20 °C hysteresis, and current limiting set to 200 mA (min) - all while maintaining stability with 1 µF ceramic output capacitors and no ESR requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8 V ±2% (over −40 °C to +85 °C, 1 mA load); supports precision analog rails in GPS and RF front-ends |
| Noise (10 Hz–100 kHz) | 15 µVrms (typ, with 100 nF Cnoise); enables clean biasing of low-noise amplifiers without post-regulation filtering |
| PSRR | 80 dB (typ at 1 kHz); suppresses switching noise from upstream DC/DC converters in mixed-signal automotive modules |
| Dropout Voltage | 100 mV (typ at 150 mA, VOUT = 1.8 V); allows operation from 1.9 V input - critical for battery-powered HD radio receivers |
| Ground Current | 70 µA (typ at 1 mA); minimizes quiescent drain in always-on vehicle telematics subsystems |
| Enable Threshold | 0.4 V (max low), 1.2 V (min high); compatible with 1.8 V GPIO without level-shifting in modern SoC designs |
| Thermal Shutdown | 150 °C (typ) with 20 °C hysteresis; protects against sustained overloads in enclosed infotainment enclosures |
Pinout & Package
NCV8570SN18T1G uses the TSOP−5 (Case 483) surface-mount package: 3.0 mm × 1.5 mm × 1.1 mm body, gull-wing leads, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Main input supply pin; accepts 2.5 V to 5.5 V; requires 0.1 µF ceramic bypass capacitor close to pin |
| 2 | GND | Power ground reference; fused internally; must be connected to low-impedance PCB ground plane |
| 3 | Vout | Regulated 1.8 V output; stable with ≥1 µF X7R ceramic capacitor; no ESR minimum required |
| 4 | Cnoise | Noise reduction terminal tied directly to bandgap reference; connect 10–100 nF capacitor to GND to reduce output noise |
| 5 | CE | Chip enable input; internal 5 MΩ pull-down; drive >1.2 V to enable, <0.4 V to disable; draws ≤1 µA in sleep mode |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 15 µVrms (10 Hz–100 kHz) with 100 nF Cnoise capacitor - eliminates need for secondary LC filtering in RF PA stages |
| High PSRR at RF frequencies | 80 dB at 1 kHz, 65 dB at 10 kHz - maintains signal integrity when powered from noisy buck converter outputs |
| Active discharge circuit | Fast Vout discharge on CE deactivation - prevents latch-up in multi-rail systems during power sequencing |
| AEC−Q100 qualified | Grade 1 (−40 °C to +125 °C junction) with PPAP capability - meets automotive functional safety requirements for infotainment ECUs |
| Stable with minimal output capacitance | Works with 1 µF ceramic capacitor only - reduces BOM count and PCB area vs. legacy LDOs requiring 10–22 µF tantalum |
Applications
| Satellite Radio Power Amplifier | Automotive GPS Front-End |
|---|---|
|
Use Scenario: Biasing Class-A low-noise amplifier in satellite radio tuner module operating in vehicle cabin with high EMI. IC Role / Device Role / Timing Role: Primary 1.8 V analog supply for RF LNA; provides ultra-clean voltage independent of engine cranking transients. Use Value: 15 µVrms noise ensures <−165 dBm/Hz noise floor; 80 dB PSRR rejects alternator ripple at 120 Hz and switching noise from 2 MHz DC/DC. |
Use Scenario: Powering GPS baseband IC and RF synthesizer in head-unit navigation system with tight thermal constraints. IC Role / Device Role / Timing Role: Low-dropout 1.8 V regulator for GPS correlator and ADC reference; enabled only during position fix acquisition. Use Value: 100 mV dropout enables operation down to 1.9 V battery; 1 µA sleep current extends battery backup runtime during vehicle off-state. |
| HD Audio DAC Supply | Infotainment System Core Logic |
|
Use Scenario: Isolating sensitive audio DAC analog supply from noisy digital SoC domain in premium car audio system. IC Role / Device Role / Timing Role: Dedicated 1.8 V rail for DAC reference and analog output stage; decoupled via Cnoise pin. Use Value: 15 µVrms noise translates to >110 dB SNR; Cnoise pin allows tuning noise profile without changing main output capacitor. |
Use Scenario: Providing regulated 1.8 V to FPGA configuration I/O banks and memory interface in modular infotainment platform. IC Role / Device Role / Timing Role: Always-on LDO for FPGA configuration retention and wake-up logic; CE controlled by system MCU. Use Value: 70 µA ground current at light load minimizes standby power; thermal shutdown prevents damage during firmware update reboots. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS79918DRVR | 1.8 V, 200 mA, 25 µVrms noise, 60 dB PSRR @ 1 kHz, SOT-23-5 package | Lacks dedicated Cnoise pin; higher noise limits use in ultra-sensitive RF stages | Choose for cost-sensitive non-automotive designs where AEC−Q100 is not required and noise <20 µVrms is acceptable |
| NCP1117ST18T3G | 1.8 V, 1 A, 420 µVrms noise, 40 dB PSRR @ 120 Hz, SOT-223 package | Higher noise and lower PSRR; designed for general-purpose loads, not RF | Choose only for high-current digital logic rails where noise performance is secondary to output current capability |
Compared with TPS79918DRVR, NCV8570SN18T1G delivers 10 dB better PSRR and 10 µVrms lower noise due to its BiCMOS architecture and Cnoise pin - making it irreplaceable in satellite radio PA biasing. Versus NCP1117ST18T3G, it trades 800 mA current capacity for 28× lower noise and automotive qualification - essential for safety-critical infotainment subsystems.
Availability
NCV8570SN18T1G is available at Aetrix Electronics and suitable for automotive infotainment systems, satellite radio modules, and GPS navigation units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for NCV8570SN18T1G 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 power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The NCV8570 series belongs to onsemi's automotive-qualified LDO portfolio, designed specifically to meet stringent noise, PSRR, and reliability requirements of RF-sensitive vehicle subsystems such as telematics, ADAS sensors, and digital radio receivers.
FAQ
What is the maximum input voltage rating for the NCV8570SN18T1G?
The NCV8570SN18T1G has an absolute maximum input voltage (Vin) rating of −0.3 V to 6 V. Operation above 5.5 V is not recommended per electrical characteristics - the device is optimized for 2.5 V to 5.5 V input range to maintain 1.8 V regulation, low dropout, and specified PSRR performance. Exceeding 6 V risks permanent damage.
Does the NCV8570SN18T1G require an external capacitor on the Cnoise pin?
Yes - the NCV8570SN18T1G requires a capacitor (10 nF to 100 nF) between the Cnoise pin and GND to achieve its specified 15 µVrms noise performance. Without this capacitor, output noise rises to 20 µVrms. The capacitor must be placed close to the pin with short traces to avoid parasitic inductance that degrades high-frequency noise suppression.
Is the NCV8570SN18T1G pin-compatible with other variants in the NCV8570 family?
No - the NCV8570SN18T1G (TSOP−5) is not pin-compatible with DFN6-packaged variants like NCV8570MN180R2G. While both share identical pin functions (Vin, GND, Vout, Cnoise, CE), their physical layouts differ: TSOP−5 assigns Vout to pin 3 and Cnoise to pin 4, whereas DFN6 places Vout on pin 4 and Cnoise on pin 6. PCB layout must match the specific package variant.
What is the thermal resistance (RJA) of the NCV8570SN18T1G in its TSOP−5 package?
The NCV8570SN18T1G in TSOP−5 package has a junction-to-ambient thermal resistance (RJA) of 220 °C/W (typical, with no copper pour) and 109 °C/W (junction-to-lead). With 1 oz copper on 1 in² PCB area, RJA improves to ~150 °C/W. Derating is required above 85 °C ambient - full 200 mA load is only supported below 70 °C ambient with standard layout.
How does the active discharge feature work in the NCV8570SN18T1G?
When the CE pin is driven low, the NCV8570SN18T1G activates an internal NMOS transistor between Vout and GND, discharging the output capacitor rapidly. This circuit draws power from Vout itself - ensuring <1 µA quiescent current during sleep mode. Discharge time depends on COUT value and load; typical turn-off time is 800 µs with 1 µF capacitor and 1 mA load.
NCV8570SN18T1G 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:
- -
NCV8570SN18T1G FAQ
1.How can I place an order for NCV8570SN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8570SN18T1G 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 NCV8570SN18T1G reliable?
The price and inventory of NCV8570SN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8570SN18T1G is usually 5 days.
3.What payment methods are accepted for NCV8570SN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8570SN18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8570SN18T1G?
NCV8570SN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8570SN18T1G 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 NCV8570SN18T1G?
For technical support, including NCV8570SN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8570SN18T1G requirements.
6.How does Aetrix verify that NCV8570SN18T1G is sourced from the original manufacturer or authorized distributors?
All NCV8570SN18T1G 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 NCV8570SN18T1G meets industry standards.
7.What is the process for return or replacement of NCV8570SN18T1G?
All NCV8570SN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8570SN18T1G, 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 NCV8570SN18T1G part is unused and in its original packaging.
Return procedure for NCV8570SN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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