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onsemi NCP4682DSQ25T1G
- Part No.:
- NCP4682DSQ25T1G
- Manufacturer:
- onsemi
- Package:
- SC-82A, SOT-343
- Datasheet:
-
NCP4682DSQ25T1G.pdf
- Description:
- IC REG LINEAR 2.5V 150MA SC82AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,972
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Product details
Overview
NCP4682DSQ25T1G from onsemi is a 150 mA CMOS low-dropout linear voltage regulator with 2.5 V fixed output, ±0.8% output voltage accuracy, 0.34 V dropout (at 150 mA), and ultra-low 1.0 µA quiescent current. It features Chip Enable (active-high), current fold-back protection, and stable operation with 0.1 µF ceramic output capacitors - designed for power-sensitive applications such as battery-powered cameras and STBs.
For engineers reviewing the NCP4682DSQ25T1G datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, package-specific pin functions, real-world application mappings, and validated alternative options for low-noise, low-IQ LDO selection in space-constrained portable designs.
Technical Context
The NCP4682DSQ25T1G implements a CMOS-based LDO architecture with internal N-channel pass transistor, enabling low dropout and high PSRR (30 dB at 1 kHz). Its enable logic is active-high with 1.5 V threshold, and it includes an integrated output discharger (NCP4682D variant) for fast VOUT discharge during shutdown.
It operates across 1.70–5.25 V input range with thermal shutdown and current fold-back protection. The SC-82AB package (1.8 × 1.1 mm) supports high thermal resistance (RJA = 263 °C/W), requiring careful PCB copper area design for >50 mW continuous dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±0.8% (ensures stable core/sensor rail without external feedback) |
| Max Output Current | 150 mA continuous (supports single-core microcontrollers or image sensors) |
| Dropout Voltage | 0.34 V at 150 mA (enables regulation down to VIN = 2.84 V, critical for Li-ion or dual-cell alkaline systems) |
| Quiescent Current | 1.0 µA typical (extends battery life in always-on standby modes) |
| PSRR | 30 dB at 1 kHz (suppresses switching noise from adjacent DC-DC converters) |
| Output Noise | 70 µVRMS (10 Hz–100 kHz, suitable for analog sensor or ADC reference rails) |
| Operating Input Range | 1.70 V to 5.25 V (compatible with single Li-ion, 2×AA/AAA, or regulated 3.3 V/5 V supplies) |
Pinout & Package
Package: SC-82AB (Case 419C), 4-pin, 1.8 mm × 1.1 mm footprint, Pb-free, exposed pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VIN) | Input supply connection | Accepts 1.70–5.25 V; requires 0.1 µF ceramic decoupling placed adjacent to pin |
| 2 (GND) | Ground reference | Primary return path; connects to exposed thermal pad (recommended for thermal relief) |
| 3 (CE) | Chip Enable input | Active-high logic (VCEH = 1.5 V min); pulls down 0.3 µA when unconnected - tie to VIN if unused |
| 4 (VOUT) | Regulated output | Delivers 2.5 V ±0.8%; stable with ≥0.1 µF ceramic capacitor; includes auto-discharge path in D-version |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 1.0 µA typical enables >1-year battery life in 10 µA average-load IoT sensors |
| Auto-output discharge | Integrated Nch transistor rapidly discharges VOUT on CE deactivation - eliminates hold-up time in sequenced power-down |
| Ceramic capacitor stability | Stable with 0.1 µF or larger X5R/X7R ceramics - reduces BOM count vs. tantalum-dependent LDOs |
| Current fold-back protection | Reduces output current and voltage during short-circuit - prevents thermal runaway without external current-sense circuitry |
| High PSRR at low frequency | 30 dB at 1 kHz suppresses ripple from buck converter switching edges before entering sensitive analog stages |
Applications
| Camera Power Management | STB Core Rail |
|---|---|
|
Use Scenario: Powering image sensor analog front-end and ISP core in compact digital cameras. IC Role / Device Role / Timing Role: Provides clean, low-noise 2.5 V supply with fast transient response to burst-mode sensor readout. Use Value: 70 µVRMS noise and 0.34 V dropout ensure consistent ADC performance and extended runtime from single-cell Li-ion. |
Use Scenario: Supplying 2.5 V logic rail for SoC subsystems in set-top boxes during deep-sleep mode. IC Role / Device Role / Timing Role: Delivers regulated voltage with 1.0 µA IQ and active CE control for wake-on-IR functionality. Use Value: Enables <10 µA system standby current while maintaining instant wake capability via CE pin assertion. |
| Portable DVR Audio Codec | Smart Home Sensor Hub |
|
Use Scenario: Biasing audio codec and microphone preamp in battery-operated dashcams. IC Role / Device Role / Timing Role: Supplies low-noise 2.5 V reference for high-SNR audio conversion with minimal EMI coupling. Use Value: 30 dB PSRR at 1 kHz rejects switching noise from nearby PMIC, preserving 95+ dB SNR in analog audio path. |
Use Scenario: Powering multi-sensor fusion module (temperature, humidity, motion) in battery-powered smart thermostats. IC Role / Device Role / Timing Role: Regulates 2.5 V rail for precision ADCs and low-power MCU with programmable enable sequencing. Use Value: Auto-discharge function ensures rapid VOUT collapse during sleep transitions, eliminating leakage through downstream pull-ups. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2502E/TO | 250 mA rating, 1.6 µA IQ, no CE pin, SOT-23-3 package | Lacks enable and auto-discharge; suited for simpler always-on rails | Select when board space allows SOT-23-3 and CE control is unnecessary |
| NCP114AMX25TBG | 300 mA, 2.5 µA IQ, CE pin, UDFN-4 1.0×1.0 mm, no auto-discharge | Higher current but higher IQ; same footprint but different pinout (VIN/GND/CE/VOUT vs. VIN/CE/GND/VOUT) | Choose for higher load margin where auto-discharge is not required and layout permits pinout revision |
Compared with MCP1700-2502E/TO and NCP114AMX25TBG, the NCP4682DSQ25T1G uniquely combines ultra-low 1.0 µA quiescent current, active-high CE, and integrated output discharge - making it optimal for battery-powered systems requiring both low standby power and controlled power-down sequencing.
Availability
NCP4682DSQ25T1G is available at Aetrix Electronics and suitable for camera modules, set-top box subsystems, and portable DVRs requiring stable component supply with guaranteed long-term manufacturability and Pb-free compliance.
Supply support for NCP4682DSQ25T1G 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 focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and intelligent power systems.
The NCP4682DSQ25T1G belongs to onsemi's ultra-low-IQ LDO family, engineered specifically for battery longevity and fast dynamic response in portable consumer and IoT edge devices.
FAQ
What is the maximum input voltage for the NCP4682DSQ25T1G?
The absolute maximum input voltage for the NCP4682DSQ25T1G is 6.0 V per Absolute Maximum Ratings. However, the recommended operating input voltage range is 1.70 V to 5.25 V. Operation above 5.25 V is only permitted for ≤500 hours total lifetime and must not exceed 5.50 V - a constraint critical for long-life battery applications where overvoltage transients must be clamped externally.
Does the NCP4682DSQ25T1G require an external pull-up on the CE pin?
No, the NCP4682DSQ25T1G does not require an external pull-up on the CE pin. It includes an internal pull-down current source (0.3 µA typical), so the CE pin defaults to logic low (disable state) when left floating. To enable the device permanently, connect CE directly to VIN - no resistor needed. This simplifies layout and eliminates standby current from external bias networks.
How does the auto-discharge feature work in the NCP4682DSQ25T1G?
The NCP4682DSQ25T1G (D-version) integrates an N-channel transistor between VOUT and GND that activates automatically when CE is driven low. This discharges the output capacitor rapidly - reducing VOUT to <0.1 V within microseconds - ensuring clean power-down sequencing in multi-rail systems and preventing back-powering of upstream regulators or logic.
Can the NCP4682DSQ25T1G operate stably with a 0.1 µF ceramic output capacitor?
Yes, the NCP4682DSQ25T1G is explicitly characterized and guaranteed stable with a minimum 0.1 µF ceramic output capacitor (X5R/X7R dielectric), as confirmed in the Electrical Characteristics table and Application Information section. Larger values improve transient response but are not required for stability - enabling minimal BOM count and small PCB area in size-constrained designs.
What is the thermal resistance (RJA) of the NCP4682DSQ25T1G in its SC-82AB package?
The NCP4682DSQ25T1G in SC-82AB package has a junction-to-air thermal resistance (RJA) of 263 °C/W, as specified in the Thermal Characteristics table. This value assumes standard JEDEC test board conditions; actual RJA improves significantly with PCB copper pour under the exposed pad - design guidance recommends connecting the pad to a solid GND plane for best thermal performance.
NCP4682DSQ25T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-82A, SOT-343
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.25V
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.4V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 1.5 µA
- Current - Supply (Max):
- -
- PSRR:
- 30dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-82AB
NCP4682DSQ25T1G FAQ
1.How can I place an order for NCP4682DSQ25T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4682DSQ25T1G 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 NCP4682DSQ25T1G reliable?
The price and inventory of NCP4682DSQ25T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4682DSQ25T1G is usually 5 days.
3.What payment methods are accepted for NCP4682DSQ25T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4682DSQ25T1G transactions.
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4.How is shipping managed for NCP4682DSQ25T1G?
NCP4682DSQ25T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4682DSQ25T1G 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 NCP4682DSQ25T1G?
For technical support, including NCP4682DSQ25T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4682DSQ25T1G requirements.
6.How does Aetrix verify that NCP4682DSQ25T1G is sourced from the original manufacturer or authorized distributors?
All NCP4682DSQ25T1G 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 NCP4682DSQ25T1G meets industry standards.
7.What is the process for return or replacement of NCP4682DSQ25T1G?
All NCP4682DSQ25T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4682DSQ25T1G, 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 NCP4682DSQ25T1G part is unused and in its original packaging.
Return procedure for NCP4682DSQ25T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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