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onsemi NCP4624DSN18T1G
- Part No.:
- NCP4624DSN18T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4624DSN18T1G.pdf
- Description:
- IC REG LINEAR 1.8V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,090
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Product details
Overview
NCP4624DSN18T1G from onsemi is a CMOS 150 mA low-dropout linear voltage regulator with 1.8 V fixed output, 2.5 V to 8.3 V input range (max 11 V), ±2% output accuracy, and integrated reverse current protection - designed for industrial and portable battery-powered systems requiring stable low-quiescent-current regulation.
For engineers reviewing the NCP4624DSN18T1G datasheet, pinout, applications, or equivalent options, this page delivers verified specifications, SOT-23-5 package details, thermal and transient performance data, and real-world selection guidance for low-noise, wide-input LDO deployment in space-constrained designs.
Technical Context
The NCP4624DSN18T1G implements a PMOS pass transistor architecture enabling ultra-low quiescent current (2.0 µA typical) and reverse current blocking when VOUT > VIN. Its internal CE pin logic is active-high and includes an internal pull-down current source (0.3–0.9 µA) ensuring reliable disable state without external components.
It features built-in current limiting (45 mA short-circuit limit), dropout voltage as low as 1.48 V at 150 mA (for 1.8 V output), and operates across −40°C to +85°C ambient with junction temperature up to +150°C. The device supports stable operation with only 0.1 µF ceramic input and output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8 V ±2% over −40°C to +85°C - ensures precise rail generation for 1.8 V logic, memory, or RF circuitry without external feedback. |
| Input Voltage Range | 2.5 V to 8.3 V (VOUT + 6.5 V), max 11 V - supports direct regulation from 2-cell Li-ion (up to 8.4 V) or industrial 9 V supplies. |
| Output Current | 150 mA minimum continuous - sufficient for microcontrollers, sensors, and interface ICs in compact embedded systems. |
| Quiescent Current | 2.0 µA typical at zero load - enables multi-year battery life in always-on IoT and portable equipment. |
| Dropout Voltage | 1.48 V (typ) at 150 mA - allows regulation down to ~3.3 V input while maintaining 1.8 V output, critical for brown-out resilience. |
| Line Regulation | 0.02%/V - minimizes output drift during input supply variation (e.g., battery discharge), improving system stability. |
| Reverse Current Protection | Active blocking when VOUT > VIN (threshold 55–100 mV); release hysteresis 70–120 mV - prevents backfeed in multi-rail or hot-swap systems. |
Pinout & Package
SOT-23-5 package (Case 1212), 2.7 mm × 2.5 mm footprint, 1.3 mm height, exposed pad (EP) recommended to be left floating or connected to GND for thermal relief.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input power supply connection | Accepts up to 11 V DC; requires 0.1 µF ceramic decoupling capacitor placed adjacent to pin for transient immunity. |
| GND (Pin 2) | Ground reference and return path | Common reference for all internal circuits; must be low-impedance and tied directly to PCB ground plane. |
| CE (Pin 3) | Chip enable control input | Active-high logic (1.7–VIN V threshold); internal 0.3–0.9 µA pull-down ensures safe default-off state if left unconnected. |
| NC (Pin 4) | No-connect terminal | Not internally bonded; must remain unconnected on PCB - no routing or copper pour allowed. |
| VOUT (Pin 5) | Regulated output voltage node | Delivers stable 1.8 V; requires 0.1 µF ceramic output capacitor placed adjacent to pin to ensure loop stability and load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | Operates from 2.5 V to 11 V - eliminates need for pre-regulation in high-voltage battery or industrial supply designs. |
| Ultra-low quiescent current | 2.0 µA typical - extends battery runtime in standby-mode applications such as remote sensors and wearables. |
| Integrated reverse current protection | Blocks backflow from VOUT to VIN without external MOSFET - simplifies design and reduces BOM count in multi-supply systems. |
| Auto-discharge capability (D version) | Internal NMOS discharges output capacitor during shutdown - prevents residual voltage hold-up that could delay system reset or cause latch-up. |
| Robust thermal performance | RJA = 238°C/W (SOT-23-5) - supports 150 mA operation at ambient up to 85°C with minimal heatsinking. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered wireless sensor node measuring temperature/humidity with BLE MCU and analog front-end. IC Role / Device Role / Timing Role: Primary 1.8 V supply for MCU core, ADC reference, and RF transceiver - regulated from 2-cell Li-ion (3.0–8.4 V). Use Value: 2.0 µA quiescent current enables >5-year shelf life; reverse current protection prevents cross-talk between sensor rails during partial battery replacement. |
Use Scenario: Handheld ECG monitor powered by rechargeable Li-ion, requiring clean, low-noise 1.8 V for precision analog signal chain. IC Role / Device Role / Timing Role: Low-noise post-regulator for ADC driver and op-amp biasing - rejects ripple from upstream switching converter. Use Value: 105 µVrms output noise (100 Hz–100 kHz) and 27 dB PSRR at 1 kHz preserve signal integrity for sub-mV biopotential measurements. |
| Automotive Infotainment Accessory | Smart Home Hub Controller |
|
Use Scenario: Aftermarket OBD-II dongle with GPS and cellular modem operating from vehicle 12 V bus via buck converter. IC Role / Device Role / Timing Role: Final-stage 1.8 V regulator for SoC I/O domain and memory interface - handles load transients from bursty LTE transmission. Use Value: 150 mA capability and fast load transient response (<100 µs settling) prevent brownout during modem transmit bursts; wide temp range supports under-dash mounting. |
Use Scenario: Always-on voice assistant hub using low-power MCU and mic array, powered by USB-C PD or wall adapter. IC Role / Device Role / Timing Role: Standby power supervisor - enables deep-sleep mode via CE pin while maintaining RTC and wake-up circuitry at 1.8 V. Use Value: Active-high CE with internal pull-down allows direct GPIO control; 0.2–0.6 µA standby current ensures <1 µA system sleep current when disabled. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-1802E/TT | 150 mA, 1.8 V fixed, 2.0–6.0 V input, 1.6 µA IQ, no reverse current protection | Lacks reverse current blocking and auto-discharge; limited to ≤6 V input - unsuitable for 2-cell Li-ion or industrial 9 V inputs | Choose only if input stays below 6 V and reverse blocking is handled externally. |
| Torex XC6206P182MR-G | 150 mA, 1.8 V fixed, 2.0–6.0 V input, 1.0 µA IQ, no CE pin or reverse protection | No enable control or reverse current protection; lower IQ but narrower input range and no shutdown control | Prefer only for ultra-low-IQ, always-on applications where input is strictly ≤6 V and CE functionality is unnecessary. |
Compared with MCP1700T-1802E/TT and XC6206P182MR-G, the NCP4624DSN18T1G uniquely combines 11 V max input, active-high CE, and integrated reverse current protection - making it the only drop-in solution for battery-powered systems requiring both wide-input operation and backfeed prevention in a SOT-23-5 footprint.
Availability
NCP4624DSN18T1G is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, automotive infotainment accessories, smart home hubs, and battery-powered IoT gateways requiring stable component supply with full lifecycle support.
Supply support for NCP4624DSN18T1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP4624DSN18T1G belongs to the NCP4624 family of wide-input, low-IQ LDOs engineered specifically for battery-powered and industrial systems demanding high reliability, reverse current blocking, and minimal board space - especially where 2-cell Li-ion or unregulated 9 V supplies are used.
FAQ
What is the maximum input voltage rating for the NCP4624DSN18T1G?
The NCP4624DSN18T1G has an absolute maximum input voltage of 12 V, with recommended continuous operation up to 11 V. Its operating input range is specified as 2.5 V to 8.3 V (VOUT + 6.5 V), making it suitable for 2-cell Li-ion batteries (3.0–8.4 V) and industrial 9 V supplies. Exceeding 12 V risks permanent damage per Absolute Maximum Ratings.
Does the NCP4624DSN18T1G require external capacitors, and what values are recommended?
Yes, the NCP4624DSN18T1G requires both input and output ceramic capacitors. A 0.1 µF (100 nF) X7R or better ceramic capacitor is recommended for both CIN and COUT, placed as close as possible to their respective pins. Larger values improve line/load transient response, but the device remains stable with just 0.1 µF - no ESR requirements or tantalum alternatives needed.
How does the reverse current protection function in the NCP4624DSN18T1G?
The NCP4624DSN18T1G integrates a reverse current detection circuit that activates when VOUT exceeds VIN by 55–100 mV (VREV_DET), blocking current flow from VOUT to VIN. It releases when the differential drops below 70–120 mV (VREV_REL), providing hysteresis to prevent oscillation. This function operates reliably for VOUT > 1.5 V and eliminates need for external reverse-blocking diodes or MOSFETs.
Can the NCP4624DSN18T1G be used without connecting the CE pin?
Yes - the CE pin has an internal pull-down current source (0.3–0.9 µA), so leaving it unconnected defaults the NCP4624DSN18T1G to the OFF state. To enable regulation, connect CE to VIN or a compatible logic-high signal (≥1.7 V). For always-on operation, tie CE directly to VIN; for controlled sequencing, drive CE from a GPIO or power-good signal.
What is the thermal resistance (RJA) of the NCP4624DSN18T1G in its SOT-23-5 package?
The NCP4624DSN18T1G in SOT-23-5 (Case 1212) has a junction-to-air thermal resistance (RJA) of 238°C/W under standard JEDEC test conditions. With 150 mA output current and 1.48 V dropout, power dissipation is ~222 mW - resulting in ~53°C junction rise above ambient. Adequate copper pour on GND and VIN/VOUT traces significantly improves real-world thermal performance.
NCP4624DSN18T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 11V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 2.19V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 3.7 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Reverse Polarity
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
NCP4624DSN18T1G FAQ
1.How can I place an order for NCP4624DSN18T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4624DSN18T1G 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 NCP4624DSN18T1G reliable?
The price and inventory of NCP4624DSN18T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4624DSN18T1G is usually 5 days.
3.What payment methods are accepted for NCP4624DSN18T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP4624DSN18T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP4624DSN18T1G?
NCP4624DSN18T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4624DSN18T1G 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 NCP4624DSN18T1G?
For technical support, including NCP4624DSN18T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4624DSN18T1G requirements.
6.How does Aetrix verify that NCP4624DSN18T1G is sourced from the original manufacturer or authorized distributors?
All NCP4624DSN18T1G 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 NCP4624DSN18T1G meets industry standards.
7.What is the process for return or replacement of NCP4624DSN18T1G?
All NCP4624DSN18T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4624DSN18T1G, 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 NCP4624DSN18T1G part is unused and in its original packaging.
Return procedure for NCP4624DSN18T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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