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onsemi NCP702SN31T1G
- Part No.:
- NCP702SN31T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP702SN31T1G.pdf
- Description:
- IC REG LINEAR 3.1V 200MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,178
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Product details
Overview
NCP702SN31T1G from onsemi is a 200 mA ultra-low-noise, ultra-low-quiescent-current LDO voltage regulator in TSOP-5 package, delivering fixed 3.1 V output with ±2% accuracy, 140 mV typical dropout at full load, and 11 µVRMS output noise (100 Hz–100 kHz). It powers noise-sensitive RF blocks including PLLs, VCOs, and low-noise amplifiers in portable wireless systems.
For engineers reviewing the NCP702SN31T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its adaptive ground current (10 µA typ. IQ), no-bypass-capacitor ultra-low-noise operation, active output discharge, and EN-controlled shutdown with 10 nA disable current - all critical for battery-powered precision analog supply design.
Technical Context
The NCP702SN31T1G integrates a PMOS pass transistor with adaptive biasing to maintain ultra-low quiescent current across load conditions, coupled with internal soft-start and active discharge circuitry. Its bandgap reference and error amplifier deliver tight line/load regulation (0.29 mV/V and 13 µV/mA) without external compensation.
It employs undervoltage lockout (UVLO) with 100 mV hysteresis and thermal shutdown (160°C trip, 20°C hysteresis) for robust operation. The EN pin controls both regulation and active discharge via a 1 kΩ pull-down path, enabling fast, controlled turn-off without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.1 V ±2% over full load/line/temperature range - ensures stable bias for RF ICs without trimming. |
| Max Output Current | 200 mA continuous - supports moderate-power analog subsystems like GPS receivers or Bluetooth baseband. |
| Dropout Voltage | 140 mV typical at 200 mA - enables operation from single-cell Li-ion (3.0 V min) while maintaining regulation. |
| Quiescent Current | 10 µA typical at no load - extends battery life in always-on sensor nodes and standby modes. |
| Output Noise | 11 µVRMS (100 Hz–100 kHz) - eliminates need for external noise bypass capacitor in sensitive RF supply rails. |
| PSRR | 68 dB at 1 kHz - suppresses switching noise from adjacent DC-DC converters feeding the same system. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with 1.8 V/3.3 V logic without level-shifting. |
Pinout & Package
TSOP-5 (Case 483) package: 5-pin surface-mount, 2.9 mm × 1.6 mm × 1.0 mm profile, Pb-free, RoHS-compliant.
| 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 minimize trace inductance effects. |
| 2 - EN | Enable control input | Logic-compatible enable: >0.9 V enables regulation; <0.4 V disables with active discharge (1 kΩ to GND). |
| 3 - N/C | No-connect terminal | Internally unconnected; may be tied to GND for improved thermal dissipation per datasheet recommendation. |
| 4 - GND | Power ground reference | Primary return path for load current and internal bias; must be low-impedance connection to PCB ground plane. |
| 5 - OUT | Regulated output | Delivers stable 3.1 V; requires ≥1 µF X5R/X7R ceramic capacitor (±10%, ESR <700 mΩ) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise without bypass cap | 11 µVRMS output noise achieved with only 1 µF output capacitor - reduces BOM count and board area. |
| Adaptive ground current | 10 µA IQ at no load, rising to 160 µA at 200 mA - minimizes battery drain in sleep mode while supporting full-load operation. |
| Active output discharge | 1 kΩ internal discharge path activated during shutdown - ensures rapid, controlled VOUT decay for sequencing-critical systems. |
| Stable with small ceramic COUT | Guaranteed stability with 1 µF ±10% X5R/X7R MLCC - avoids costly tantalum or large-case ceramics. |
| Integrated protection | Thermal shutdown (160°C), current limit (385 mA typ.), and UVLO (1.6 V enable threshold) - enables robust, maintenance-free deployment. |
Applications
| GPS Receiver Module | Bluetooth Audio SoC Power Rail |
|---|---|
|
Use Scenario: Supplies clean 3.1 V to GPS baseband processor and RF front-end in handheld navigation devices. IC Role / Device Role / Timing Role: Low-noise analog supply for crystal oscillator buffer and LNA stages to preserve phase noise and SNR. Use Value: 11 µVRMS noise and 68 dB PSRR prevent clock jitter and receiver desensitization caused by digital switching noise. |
Use Scenario: Powers 3.1 V analog section of Bluetooth 5.0 audio SoC in true wireless stereo earbuds. IC Role / Device Role / Timing Role: Regulated supply for DAC, headphone amplifier, and RF synthesizer blocks. Use Value: Adaptive 10 µA quiescent current extends battery runtime in multi-day standby; active discharge enables precise power sequencing. |
| Portable Medical Pulse Oximeter | IoT Sensor Node MCU Core Supply |
|
Use Scenario: Provides stable 3.1 V to photodiode transimpedance amplifier and ADC in battery-operated oximeters. IC Role / Device Role / Timing Role: Precision analog supply ensuring <±0.5% gain stability and minimal offset drift over temperature. Use Value: ±2% output accuracy and 13 µV/mA load regulation maintain measurement fidelity across 0–200 mA dynamic current draw. |
Use Scenario: Delivers regulated 3.1 V to ARM Cortex-M0+ MCU core and integrated ADC in LPWAN sensor nodes. IC Role / Device Role / Timing Role: Primary system supply enabling low-power active/sleep cycling with fast EN-controlled wake-up. Use Value: 300 µs turn-on time and 10 nA shutdown current meet sub-µA average current targets for 10-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3102E/TO | 300 mA rated, 1.6 µA IQ, but higher 25 µVRMS noise and no active discharge. | Lacks active discharge and has lower PSRR (55 dB @1 kHz); suitable where ultra-low noise is secondary to lowest IQ. | Select when minimum quiescent current dominates over RF noise performance and sequencing control. |
| Torex XC6206P312MR-G | 150 mA rated, 1 µA IQ, 20 µVRMS noise, no EN pin or thermal shutdown. | No enable control or protection features; requires external circuitry for sequencing or fault handling. | Choose only for cost-sensitive, non-critical analog rails where full protection and EN functionality are unnecessary. |
Compared with MCP1700-3102E/TO and XC6206P312MR-G, the NCP702SN31T1G uniquely combines ultra-low noise (11 µVRMS), active discharge, and comprehensive protection - making it the only option qualified for RF-sensitive, sequenced, and safety-critical portable designs.
Availability
NCP702SN31T1G is available at Aetrix Electronics and suitable for GPS modules, Bluetooth audio systems, and portable medical instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed Pb-free compliance.
Supply support for NCP702SN31T1G 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 leader focused on energy-efficient innovation, delivering high-performance silicon solutions for automotive, industrial, cloud, and IoT applications.
The NCP702SN31T1G belongs to onsemi's precision analog LDO family, engineered specifically for ultra-low-noise, ultra-low-IQ power delivery in battery-constrained RF and medical systems.
FAQ
What is the output voltage tolerance of the NCP702SN31T1G over temperature and load?
The NCP702SN31T1G maintains ±2% output voltage accuracy across −40°C to +125°C junction temperature, full 0–200 mA load range, and input voltage from VOUT + 0.3 V to 5.5 V. This specification is guaranteed by design and production-tested per onsemi's characterization methodology, ensuring consistent 3.1 V regulation in demanding portable environments where thermal and load transients occur.
Does the NCP702SN31T1G require an external noise bypass capacitor?
No, the NCP702SN31T1G achieves 11 µVRMS output noise (100 Hz–100 kHz) without any external noise bypass capacitor. Its internal architecture - including optimized bandgap reference, low-noise error amplifier, and PMOS pass device - eliminates the need for a dedicated 10 nF–100 nF capacitor typically used with other LDOs, reducing BOM count and PCB area while maintaining RF-grade cleanliness.
How does the EN pin function on the NCP702SN31T1G?
The EN pin on the NCP702SN31T1G provides logic-level ON/OFF control: driving EN >0.9 V enables regulation; driving EN <0.4 V disables the pass transistor and activates the 1 kΩ internal discharge path to GND. With 110 nA internal pull-down, the device defaults to OFF if EN is left floating - enabling safe, predictable power sequencing without external components.
What is the maximum input voltage the NCP702SN31T1G can withstand?
The NCP702SN31T1G has an absolute maximum input voltage rating of 6 V, but its recommended operating input voltage range is 2.0 V to 5.5 V. Operation above 5.5 V risks permanent damage, while below 2.0 V may trigger undervoltage lockout (UVLO) below ~1.5 V. For reliable 3.1 V output, VIN must remain ≥3.4 V (3.1 V + 140 mV dropout) under 200 mA load.
Is the NCP702SN31T1G stable with a 1 µF output capacitor?
Yes, the NCP702SN31T1G is explicitly designed and characterized for stability with a minimum 1.0 µF ceramic capacitor (X5R or X7R dielectric, ±10% tolerance, ESR <700 mΩ). This is verified across temperature, load, and input conditions per onsemi's application testing - eliminating need for larger or specialized capacitors and simplifying layout for space-constrained designs.
NCP702SN31T1G 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):
- 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 16 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 5-TSOP
NCP702SN31T1G FAQ
1.How can I place an order for NCP702SN31T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP702SN31T1G 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 NCP702SN31T1G reliable?
The price and inventory of NCP702SN31T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP702SN31T1G is usually 5 days.
3.What payment methods are accepted for NCP702SN31T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP702SN31T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP702SN31T1G?
NCP702SN31T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP702SN31T1G 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 NCP702SN31T1G?
For technical support, including NCP702SN31T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP702SN31T1G requirements.
6.How does Aetrix verify that NCP702SN31T1G is sourced from the original manufacturer or authorized distributors?
All NCP702SN31T1G 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 NCP702SN31T1G meets industry standards.
7.What is the process for return or replacement of NCP702SN31T1G?
All NCP702SN31T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP702SN31T1G, 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 NCP702SN31T1G part is unused and in its original packaging.
Return procedure for NCP702SN31T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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