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onsemi NCV8703SN18T1G
- Part No.:
- NCV8703SN18T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCV8703SN18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 300MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,891
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Product details
Overview
NCV8703SN18T1G from onsemi is an automotive-grade ultra-low-noise, ultra-low-quiescent-current LDO voltage regulator delivering 300 mA output at fixed 1.8 V with 180 mV typical dropout, ±2% output accuracy, and 13 µVRMS noise (100 Hz–100 kHz). It features adaptive ground current, active output discharge, and AEC-Q100 qualification for use in rear-view cameras, GPS receivers, and lane-change detectors.
For engineers reviewing the NCV8703SN18T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 12 µA quiescent current at no load, TSOP-5 package compatibility with space-constrained automotive PCBs, thermal shutdown at 160°C, and stable operation with only a 1 µF ceramic output capacitor.
Technical Context
The NCV8703SN18T1G employs a PMOS pass transistor with integrated soft-start and adaptive ground current control to maintain ultra-low IQ across light-load conditions. Its internal bandgap reference and enable logic support precise 1.8 V regulation over −40°C to +125°C junction temperature.
It integrates undervoltage lockout (UVLO) with 1.6 V turn-on threshold and 100 mV hysteresis, plus thermal shutdown with 20°C hysteresis (160°C trip, 140°C reset), ensuring robust operation in automotive power domains where input voltage can dip during cold-crank events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% over load/line/temperature - ensures stable core supply for 1.8 V logic and image sensors without external feedback. |
| Quiescent Current | 12 µA typical at zero load - enables >10-year battery standby in always-on automotive modules like proximity sensors. |
| Noise Performance | 13 µVRMS (100 Hz–100 kHz) - eliminates need for external noise-bypass capacitors in RF-sensitive analog signal chains. |
| Dropout Voltage | 180 mV typical at 300 mA - supports regulation from 2.0 V input down to 1.8 V output, critical for Li-ion battery discharge tails. |
| PSRR | 68 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding camera or audio subsystems. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with 1.8 V GPIOs and provides 0.5 V hysteresis to reject noise on EN line. |
| Stability | Stable with ≥0.1 µF ceramic COUT - allows use of tiny 0402/0201 MLCCs to minimize board area in compact camera modules. |
Pinout & Package
NCV8703SN18T1G is packaged in TSOP-5 (Case 483), a 3.0 mm × 1.5 mm × 0.95 mm surface-mount package with exposed thermal pad (pin 2 GND). Pin 1 is IN, pin 2 is GND, pin 3 is EN, pin 4 is N/C, pin 5 is OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input voltage supply | Accepts 2.0–5.5 V input; requires local 1 µF ceramic decoupling to suppress high-frequency noise injection. |
| 2 (GND) | Power ground reference | Die ground connected via lead frame; must be soldered to large copper pour for thermal dissipation and low-impedance return path. |
| 3 (EN) | Logic-enable control | Active-high enable: ≥0.9 V turns regulator on; ≤0.4 V forces shutdown with 120 nA supply current and active discharge. |
| 4 (N/C) | No-connect terminal | Internally unconnected; may be left floating or tied to GND for mechanical stability-no electrical function. |
| 5 (OUT) | Regulated 1.8 V output | Delivers up to 300 mA; requires 1 µF X7R/X5R ceramic capacitor placed within 2 mm for stability and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise (13 µVRMS) | Enables clean power for CMOS image sensors and GPS RF front-ends without noise-bypass caps or ferrite beads. |
| Adaptive ground current | Reduces IQ to 12 µA at no load while scaling to 200 µA at 300 mA, optimizing battery life in duty-cycled automotive modules. |
| Active output discharge | Pulls OUT to GND via 320 Ω resistor during shutdown, preventing floating voltage that could disrupt downstream logic sequencing. |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C operation with PPAP capability-meets functional safety requirements for ASIL-B systems. |
| Internal soft-start | Controls output ramp rate to limit inrush current, preventing bus droop when powering multiple LDOs simultaneously. |
Applications
| Rear-View Camera Power | GPS/GLONASS Receiver Supply |
|---|---|
Use Scenario: Powers 1.8 V image sensor and ISP in automotive backup camera modules operating under stop/start engine cycles. IC Role / Device Role / Timing Role: Primary 1.8 V LDO supplying analog and digital cores of CMOS image sensor with ultra-low noise and fast load transient recovery. Use Value: 13 µVRMS noise prevents fixed-pattern noise in captured video; 180 mV dropout sustains regulation during 2.0 V battery brownouts. | Use Scenario: Supplies 1.8 V LNA, mixer, and baseband processor in satellite navigation receivers mounted in vehicle dashboards. IC Role / Device Role / Timing Role: Low-noise bias source for RF front-end and precision ADC reference in GNSS chipsets requiring <20 µVRMS ripple. Use Value: 68 dB PSRR at 1 kHz rejects switching noise from nearby 5 V DC-DC converters; ±2% accuracy maintains timing margin in correlator circuits. |
| Lane-Change Detection Sensor | Automotive Infotainment SoC Core Rail |
Use Scenario: Provides 1.8 V supply to radar signal processor and microcontroller in blind-spot monitoring systems. IC Role / Device Role / Timing Role: Always-on LDO supporting wake-on-radar functionality with sub-15 µA quiescent current during sleep mode. Use Value: 12 µA IQ extends vehicle battery life over multi-year service intervals; AEC-Q100 qualification ensures reliability in under-hood thermal environments. | Use Scenario: Delivers 1.8 V core voltage to application processors in head-unit infotainment systems with dynamic DVFS scaling. IC Role / Device Role / Timing Role: Secondary LDO regulating SoC core rail after primary buck converter, handling fast load transients from CPU bursts. Use Value: Load transient response limits output deviation to ±100/±150 mV (1→300 mA/300→1 mA), preserving SoC timing margins during clock frequency changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCV8703MX18TCG | XDFN6 1.5×1.5 mm package (vs. TSOP-5); same electrical specs, lower thermal resistance (JA = 146°C/W vs. 241°C/W). | Better thermal performance in high-power-density layouts; requires different footprint and reflow profile. | Select when board space allows smaller footprint and thermal management demands higher power dissipation capability. |
| TPS7A0518PDBVR | 1.8 V fixed-output LDO with 25 µA IQ (vs. 12 µA), 200 mV dropout at 300 mA, and no AEC-Q100 qualification. | Not automotive-qualified; suitable for industrial or consumer portable devices but not safety-critical automotive functions. | Choose for cost-sensitive non-automotive designs where AEC-Q100 is not required and slightly higher IQ is acceptable. |
Compared with NCV8703MX18TCG, the NCV8703SN18T1G offers identical regulation performance but trades thermal efficiency for legacy TSOP-5 compatibility and easier hand-soldering; versus TPS7A0518PDBVR, it delivers superior quiescent current and automotive qualification at the cost of higher unit price and tighter layout constraints.
Availability
NCV8703SN18T1G is available at Aetrix Electronics and suitable for rear-view camera modules, GPS receiver units, and lane-change detection systems requiring stable component supply with automotive-grade reliability and long-term lifecycle support.
Supply support for NCV8703SN18T1G 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, and sensing technologies for automotive, industrial, and cloud infrastructure markets.
The NCV8703SN18T1G belongs to onsemi's automotive-qualified LDO portfolio, designed specifically to meet stringent noise, quiescent current, and thermal reliability requirements of ADAS and infotainment subsystems.
FAQ
What is the maximum input voltage rating for the NCV8703SN18T1G?
The NCV8703SN18T1G has an absolute maximum input voltage of 6 V. However, its recommended operating input range is 2.0 V to 5.5 V. Exceeding 6 V risks permanent damage due to internal ESD structure breakdown, and operation above 5.5 V voids guaranteed performance per the datasheet's Electrical Characteristics table.
Does the NCV8703SN18T1G require an external noise-bypass capacitor?
No, the NCV8703SN18T1G does not require an external noise-bypass capacitor. Its internal architecture achieves 13 µVRMS output noise (100 Hz–100 kHz) without one, as confirmed in the Applications Information section and Figure 3–6 of the datasheet. Adding a bypass cap provides no measurable improvement and consumes unnecessary board area.
How does the active output discharge function work in the NCV8703SN18T1G?
When the EN pin is driven below 0.4 V, the NCV8703SN18T1G activates an internal 320 Ω pull-down transistor between OUT and GND. This discharges the output capacitor rapidly, ensuring VOUT falls to near-zero volts within microseconds-critical for safe power sequencing in multi-rail automotive systems.
Can the NCV8703SN18T1G operate with a 0.47 µF output capacitor?
Yes, the NCV8703SN18T1G remains stable with as little as 0.1 µF effective output capacitance. A 0.47 µF X7R ceramic capacitor meets this requirement and provides adequate phase margin, though the datasheet recommends 1 µF for optimal transient response and PSRR above 100 kHz.
What is the thermal shutdown behavior of the NCV8703SN18T1G?
The NCV8703SN18T1G triggers thermal shutdown at 160°C (typical) and resets at 140°C (typical), providing 20°C hysteresis. During shutdown, the pass transistor turns off and the device draws only 120 nA from VIN. It automatically resumes regulation once die temperature falls below the reset threshold-no external reset signal is needed.
NCV8703SN18T1G 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:
- 300mA
- Current - Quiescent (Iq):
- 20 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCV8703SN18T1G FAQ
1.How can I place an order for NCV8703SN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCV8703SN18T1G 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 NCV8703SN18T1G reliable?
The price and inventory of NCV8703SN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCV8703SN18T1G is usually 5 days.
3.What payment methods are accepted for NCV8703SN18T1G?
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4.How is shipping managed for NCV8703SN18T1G?
NCV8703SN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCV8703SN18T1G 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 NCV8703SN18T1G?
For technical support, including NCV8703SN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCV8703SN18T1G requirements.
6.How does Aetrix verify that NCV8703SN18T1G is sourced from the original manufacturer or authorized distributors?
All NCV8703SN18T1G 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 NCV8703SN18T1G meets industry standards.
7.What is the process for return or replacement of NCV8703SN18T1G?
All NCV8703SN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCV8703SN18T1G, 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 NCV8703SN18T1G part is unused and in its original packaging.
Return procedure for NCV8703SN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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