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onsemi NCV8570BSN18T1G
- Part No.:
- NCV8570BSN18T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCV8570BSN18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,874
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Product details
Overview
NCV8570BSN18T1G from onsemi is an automotive-grade, 200 mA ultra-low-noise LDO voltage regulator with 1.8 V fixed output, 10 µVRMS typical output noise (10 Hz–100 kHz), 82 dB PSRR at 1 kHz, and 140 mV dropout at 200 mA - designed for RF, audio, and camera power rails in safety-critical vehicle systems.
For engineers reviewing the NCV8570BSN18T1G datasheet, pinout, applications, or equivalent options, this page delivers verified package mapping (TSOP-5), confirmed enable/active-discharge functionality, thermal shutdown thresholds (150 °C trip / 135 °C reset), and AEC-Q100-compliant performance data for noise-sensitive automotive subsystems.
Technical Context
The NCV8570BSN18T1G uses a PMOS pass transistor architecture enabling reverse-current blocking and low dropout across its 2.5–5.5 V input range. Its dedicated BYP pin provides direct access to the bandgap reference node, allowing external 10–100 nF capacitors to suppress internal noise sources and achieve sub-10 µVRMS performance at 1.8 V output.
It integrates active discharge (1 kΩ internal path), current limiting (310 mA typ), thermal shutdown with hysteresis (150 °C / 135 °C), and logic-level EN control with 5 MΩ internal pull-down - all implemented in an advanced BiCMOS process to maintain 75 µA ground current at full 200 mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2.5% - tightly regulated for noise-sensitive analog/RF ICs requiring stable core bias. |
| Max Output Current | 200 mA continuous - sufficient for powering single-channel ADCs, RF transceivers, or image sensor analog blocks. |
| Output Noise | 10 µVRMS (typ, 10 Hz–100 kHz, Cnoise = 10 nF) - enables clean power for GPS front-ends and HD audio DACs. |
| PSRR | 82 dB (typ, 1 kHz) - rejects switching noise from adjacent DC-DC converters in multi-rail automotive ECUs. |
| Dropout Voltage | 140 mV (typ, IOUT = 200 mA, VOUT = 1.8 V) - supports operation from 2.5 V input, critical for battery-backed systems. |
| Quiescent Current | 75 µA (typ, IOUT = 200 mA) - minimizes standby power in always-on ADAS modules. |
| Enable Threshold | VEN(HI) ≥ 1.2 V, VEN(LO) ≤ 0.4 V - compatible with 1.8 V/3.3 V GPIOs without level-shifting. |
Pinout & Package
NCV8570BSN18T1G is packaged in a Pb-free TSOP-5 (Case 483) surface-mount package measuring 2.9 mm × 1.6 mm × 1.1 mm, optimized for space-constrained automotive PCBs.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | IN | Input voltage supply (2.5–5.5 V); requires 1 µF ceramic decoupling capacitor to GND for stability and line transient immunity. |
| 2 | GND | Power ground reference; fused internally to EPAD in DFN variants - serves as primary thermal and electrical return path. |
| 3 | EN | Logic-enable input with 5 MΩ internal pull-down; drives device ON when ≥1.2 V, OFF when ≤0.4 V; enables system-level power sequencing. |
| 4 | OUT | Regulated 1.8 V output; stable with 1 µF+ ceramic capacitors; supports fast load transients up to 200 mA step change. |
| 5 | BYP | Noise reduction node; connects to 10–100 nF capacitor to GND to shunt bandgap reference noise - directly controls output RMS noise floor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 10 µVRMS (10 Hz–100 kHz) with 10 nF BYP cap - meets stringent SNR requirements of automotive radar receivers and CMOS image sensors. |
| Active output discharge | Internal 1 kΩ discharge path activated on EN deassertion - ensures rapid, controlled VOUT ramp-down to prevent latch-up in downstream logic. |
| AEC-Q100 qualification | Grade 1 (−40 °C to +125 °C ambient) - validated for engine bay, infotainment, and ADAS applications requiring automotive reliability. |
| Stable with low-ESR ceramics | Works with ≥1 µF X5R/X7R MLCCs - eliminates need for bulky tantalum or electrolytic capacitors, reducing board area and cost. |
| Thermal shutdown with hysteresis | 150 °C trip / 135 °C reset - prevents thermal runaway during sustained overload while avoiding oscillation near threshold. |
Applications
| ADAS Camera Power | Automotive Infotainment Audio |
|---|---|
|
Use Scenario: Powering analog front-end and ISP core of rear-view or surround-view camera modules in vehicles. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying image sensor analog bias and digital core logic with ultra-low ripple. Use Value: 10 µVRMS noise prevents fixed-pattern noise in captured video; 82 dB PSRR isolates sensor from switching noise of main SoC DC-DC. |
Use Scenario: Clean power for high-fidelity audio DACs and headphone amplifiers in head units and premium sound systems. IC Role / Device Role / Timing Role: Low-noise post-regulator delivering stable 1.8 V to audio codec ICs sensitive to supply-induced distortion. Use Value: Sub-10 µVRMS output enables >110 dB THD+N performance; active discharge prevents pop/click during mute/unmute transitions. |
| GPS/GLONASS RF Front-End | Automotive Telematics Modem |
|
Use Scenario: Biasing low-noise amplifiers (LNAs) and downconversion mixers in satellite navigation receivers. IC Role / Device Role / Timing Role: Dedicated LDO for RF signal chain, decoupled from noisy digital domains via high PSRR. Use Value: 82 dB PSRR at 1 kHz suppresses coupling from CAN/LIN bus transceivers; 140 mV dropout allows operation from degraded 12 V rail. |
Use Scenario: Powering cellular modem baseband processors and GNSS receivers in telematics control units (TCUs). IC Role / Device Role / Timing Role: Always-on 1.8 V supply enabling fast wake-from-sleep and maintaining GPS almanac/data during ignition-off. Use Value: 75 µA quiescent current extends battery backup runtime; AEC-Q100 Grade 1 rating ensures operation in under-hood temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2018PDBVR | Lower noise (6.5 µVRMS), but not AEC-Q100 qualified; 300 mA output; 0.5 µA quiescent current in shutdown. | Targeted at industrial or consumer portable devices - lacks automotive qualification and thermal robustness for under-hood use. | Select only for non-automotive designs where AEC-Q100 is not required and lower quiescent current is prioritized over automotive reliability. |
| NCP1117ST18T3G | Higher noise (45 µVRMS), no BYP pin, no active discharge, 800 mA output; TO-220/SOT-223 packages. | General-purpose automotive LDO - suitable for less noise-sensitive digital rails (e.g., microcontroller I/O), not RF/audio. | Choose when cost and output current are primary concerns and ultra-low noise is unnecessary; verify thermal design due to higher dropout and no active discharge. |
Compared with TPS7A2018PDBVR and NCP1117ST18T3G, the NCV8570BSN18T1G uniquely combines AEC-Q100 Grade 1 qualification, 10 µVRMS noise, and integrated active discharge - making it the only viable option for safety-critical, noise-sensitive automotive analog power domains.
Availability
NCV8570BSN18T1G is available at Aetrix Electronics and suitable for ADAS camera modules, automotive infotainment audio subsystems, and telematics GNSS receivers requiring stable component supply with full automotive traceability and PPAP support.
Supply support for NCV8570BSN18T1G 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 is a global semiconductor supplier focused on energy-efficient innovation for automotive, industrial, cloud, medical, and IoT applications.
The NCV8570B series is part of onsemi's automotive power management portfolio, engineered specifically for noise-sensitive analog and RF subsystems in ADAS, infotainment, and telematics - emphasizing ultra-low noise, high PSRR, and AEC-Q100 compliance.
FAQ
What is the maximum input voltage rating for the NCV8570BSN18T1G?
The NCV8570BSN18T1G has an absolute maximum input voltage rating of 6 V. Operation is specified over 2.5 V to 5.5 V input range. Exceeding 6 V may cause permanent damage per the Absolute Maximum Ratings table in the datasheet. The device includes overvoltage protection only at the junction level - external clamping is recommended if input transients exceed 6 V.
Does the NCV8570BSN18T1G require an external capacitor on the BYP pin?
Yes, the NCV8570BSN18T1G requires an external capacitor (10–100 nF) between BYP and GND to achieve its specified 10 µVRMS output noise. Without this capacitor, noise increases significantly - e.g., to 15 µVRMS with 10 nF and 9.5 µVRMS with 100 nF at 200 mA load. The BYP pin accesses the internal bandgap reference, and the capacitor directly filters its dominant noise contribution.
How does the active discharge function work in the NCV8570BSN18T1G?
When the EN pin is pulled low, the NCV8570BSN18T1G activates an internal 1 kΩ discharge path from OUT to GND. This rapidly discharges the output capacitor (COUT) to prevent residual voltage from interfering with downstream logic states during power-down sequencing. Discharge time depends on COUT value - e.g., ~10 ms for 10 µF - and is independent of load current.
Is the NCV8570BSN18T1G pin-compatible with other variants in the NCV8570B family?
Yes, all NCV8570B variants in the TSOP-5 package (including NCV8570BSN25T1G, NCV8570BSN33T1G) share identical pinout: Pin 1=IN, Pin 2=GND, Pin 3=EN, Pin 4=OUT, Pin 5=BYP. Output voltage is set by internal trimming - no external resistors are used. This allows drop-in replacement across voltage options when board layout permits same thermal and decoupling design.
What thermal derating applies to the NCV8570BSN18T1G at elevated ambient temperatures?
The NCV8570BSN18T1G's maximum output current derates above +85 °C ambient due to thermal shutdown activation at 150 °C junction temperature. With the TSOP-5 package's RJA = 204 °C/W on standard FR4, continuous 200 mA operation is limited to ≤+75 °C ambient unless additional copper area or airflow is provided. Derating curves are shown in Figure 7–9 of the datasheet for VOUT = 1.8–3.3 V.
NCV8570BSN18T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 110 µA
- Current - Supply (Max):
- 130 µA
- PSRR:
- 82dB ~ 63dB (1kHz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCV8570BSN18T1G FAQ
1.How can I place an order for NCV8570BSN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8570BSN18T1G 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 NCV8570BSN18T1G reliable?
The price and inventory of NCV8570BSN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8570BSN18T1G is usually 5 days.
3.What payment methods are accepted for NCV8570BSN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCV8570BSN18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCV8570BSN18T1G?
NCV8570BSN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8570BSN18T1G 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 NCV8570BSN18T1G?
For technical support, including NCV8570BSN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8570BSN18T1G requirements.
6.How does Aetrix verify that NCV8570BSN18T1G is sourced from the original manufacturer or authorized distributors?
All NCV8570BSN18T1G 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 NCV8570BSN18T1G meets industry standards.
7.What is the process for return or replacement of NCV8570BSN18T1G?
All NCV8570BSN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8570BSN18T1G, 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 NCV8570BSN18T1G part is unused and in its original packaging.
Return procedure for NCV8570BSN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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