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onsemi NCP4626DSN033T1G
- Part No.:
- NCP4626DSN033T1G
- Manufacturer:
- onsemi
- Package:
- SC-74A, SOT-753
- Datasheet:
-
NCP4626DSN033T1G.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,648
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Product details
Overview
NCP4626DSN033T1G from onsemi is a 3.3 V, 300 mA CMOS low-dropout linear regulator with reverse current protection, ECO mode selection (fast/low-power), ±2.5% output accuracy in low-power mode, and stable operation with 2.2 µF input / 4.7 µF output ceramic capacitors. It serves as a primary voltage rail regulator in battery-backed audio-visual systems where VIN may transiently fall below VOUT.
For engineers reviewing the NCP4626DSN033T1G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout voltage at 300 mA (700 mV typ. in low-power mode), quiescent current (6 µA typ.), reverse current blocking capability (<0.1 µA), thermal shutdown (150°C), and SOT-23-5 package compatibility with space-constrained consumer PCBs.
Technical Context
The NCP4626DSN033T1G integrates a reverse-current detector, fold-back current limiting, and thermal shutdown within a single CMOS LDO architecture. Its dual-mode ECO pin selects between fast-response operation (550 mV dropout at 300 mA, 60 dB PSRR at 1 kHz) and ultra-low-quiescent operation (6 µA IQ, ±2.5% VOUT accuracy over −40°C to +85°C).
It operates across 3.5 V to 16 V input range with 3.3 V fixed output, supports auto-discharge via internal N-channel transistor (D-version), and maintains stability with minimal external components-no ESR requirements for CIN/COUT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2.5% (−40°C to +85°C, low-power mode) |
| Max Output Current | 300 mA continuous; enables powering microcontrollers, sensors, and audio codecs |
| Dropout Voltage | 700 mV typ. at 300 mA (low-power mode); allows regulation from 4.0 V input |
| Quiescent Current | 6 µA typ. (ECO = GND); extends battery life in always-on standby circuits |
| Reverse Current | <0.1 µA when VOUT > VIN; prevents backfeed in multi-rail or backup power systems |
| PSRR | 60 dB at 1 kHz; suppresses switching noise from upstream DC-DC converters |
| Thermal Shutdown | Activates at 150°C junction temperature; protects against sustained overload or poor heatsinking |
Pinout & Package
Package: SOT-23-5 (Case 1212), Pb-free, 2.7 mm × 2.5 mm footprint with exposed pad connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ECO) | Mode select input | Logic high (VIN) → fast mode; logic low (GND) → low-power mode; must not float |
| 2 (GND) | Ground reference | Primary return path; connects to exposed pad (internal GND tie) |
| 3 (CE) | Chip enable input | Active-high; internal pull-down allows direct VIN tie if unused |
| 4 (VOUT) | Regulated output | 3.3 V supply rail; includes auto-discharge transistor (D-version) to rapidly discharge COUT on disable |
| 5 (VIN) | Input voltage supply | 3.5–16 V input; max 18 V absolute rating; requires 2.2 µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Reverse current protection | Blocks backflow when VOUT > VIN - critical for battery backup and hot-swap applications |
| Dual-mode ECO control | Selects between 6 µA IQ (low-power) or 550 mV dropout (fast) without changing BOM or layout |
| Auto-discharge function | Internal N-ch transistor discharges output capacitor on CE deassertion - eliminates hold-up delay in system reset |
| Stable with low-ESR ceramics | Requires only 2.2 µF CIN / 4.7 µF COUT - no tantalum or aluminum electrolytics needed |
| Thermal foldback protection | Reduces output current during overload to limit power dissipation and prevent thermal runaway |
Applications
| Digital Home Appliances | Audio Visual Equipment |
|---|---|
Use Scenario: Powering MCU, display driver, and IR receiver in smart TV standby subsystem. IC Role / Device Role / Timing Role: Primary 3.3 V LDO supplying always-on logic with <6 µA quiescent draw. Use Value: Enables sub-10 µA system standby current while maintaining instant wake-up capability. | Use Scenario: Regulating 3.3 V rail for HDMI receiver IC and audio DAC in soundbar. IC Role / Device Role / Timing Role: Low-noise, high-PSRR post-regulator cleaning switched DC-DC output. Use Value: 60 dB PSRR at 1 kHz suppresses DC-DC ripple, reducing audible noise in analog audio paths. |
| Battery Backup Circuits | Industrial Control Panels |
Use Scenario: Maintaining real-time clock and SRAM during main power loss in set-top box. IC Role / Device Role / Timing Role: Reverse-current-protected LDO allowing VOUT (3.3 V) to remain active even if VIN drops to 0 V. Use Value: Prevents backup battery discharge through main power rail - extends battery service life by >3×. | Use Scenario: Supplying isolated I/O expander and touch controller in factory HMI panel. IC Role / Device Role / Timing Role: Robust 3.3 V regulator tolerant of 16 V transients and 85°C ambient. Use Value: 150°C thermal shutdown and 18 V max input withstand industrial surge conditions without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3302E/TT | 250 mA max output, 6 µA IQ, no ECO mode or reverse current protection | Lacks auto-discharge and reverse-blocking - unsuitable for battery backup | Choose only for cost-sensitive, non-backup, low-current (<250 mA) designs |
| TLS850B2TE/V33 | 500 mA, integrated watchdog, AEC-Q100 qualified, 30 µA IQ in standby | Automotive-grade with diagnostics - overqualified and higher IQ for consumer use | Prefer only if functional safety or automotive qualification is mandatory |
Compared with MCP1700T-3302E/TT, NCP4626DSN033T1G delivers 20% higher current and critical reverse-current blocking; versus TLS850B2TE/V33, it offers 80% lower quiescent current and smaller SOT-23 footprint at the expense of automotive qualification.
Availability
NCP4626DSN033T1G is available at Aetrix Electronics and suitable for digital home appliances, audio visual equipment, and battery backup circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP4626DSN033T1G 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP4626 series is designed for space-constrained, low-power consumer and industrial systems requiring robust LDO performance with reverse-current immunity and selectable efficiency/transient response trade-offs.
FAQ
What is the maximum input voltage rating for the NCP4626DSN033T1G?
The NCP4626DSN033T1G has an absolute maximum input voltage rating of 18 V. Its recommended operating input range is 3.5 V to 16 V. Exceeding 18 V risks permanent damage, and operation above 16 V is outside specified performance limits per the datasheet's Recommended Operating Conditions table.
Does the NCP4626DSN033T1G provide reverse current protection, and how does it work?
Yes, the NCP4626DSN033T1G includes integrated reverse current protection. When VOUT exceeds VIN (e.g., during power loss or hot-swap), the internal circuitry blocks current flow from VOUT to VIN, limiting reverse current to <0.1 µA. This prevents unintended discharge of backup batteries or interference with upstream supplies - a key feature confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables.
What is the purpose of the ECO pin on the NCP4626DSN033T1G, and how should it be used?
The ECO pin on the NCP4626DSN033T1G selects between two operating modes: logic high (connected to VIN) enables fast mode (550 mV dropout, better transient response); logic low (connected to GND) enables low-power mode (6 µA IQ, ±2.5% VOUT accuracy). The pin must never be left floating - datasheet Figure 2 and Pin Function Description explicitly warn against indefinite internal current flow if biased between threshold voltages.
Is the NCP4626DSN033T1G compatible with ceramic output capacitors, and what value is required?
Yes, the NCP4626DSN033T1G is fully stable with ceramic output capacitors. A minimum 4.7 µF X5R/X7R ceramic capacitor is required on VOUT, placed as close as possible to the device pins. The datasheet confirms stability with no ESR requirements, eliminating need for tantalum or aluminum electrolytics - verified in Application Information section and Typical Characteristics Figures 3–8.
What thermal protection features does the NCP4626DSN033T1G include, and at what temperature does it activate?
The NCP4626DSN033T1G includes thermal shutdown protection that activates at a junction temperature of 150°C (typical), with hysteresis releasing regulation at 130°C. This prevents permanent damage during overload or inadequate heatsinking. The thermal characteristics are validated in Absolute Maximum Ratings and confirmed in Typical Characteristics Figures 75–80 showing startup behavior under thermal stress.
NCP4626DSN033T1G 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):
- 16V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 1V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
NCP4626DSN033T1G FAQ
1.How can I place an order for NCP4626DSN033T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP4626DSN033T1G 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 NCP4626DSN033T1G reliable?
The price and inventory of NCP4626DSN033T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP4626DSN033T1G is usually 5 days.
3.What payment methods are accepted for NCP4626DSN033T1G?
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NCP4626DSN033T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP4626DSN033T1G 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 NCP4626DSN033T1G?
For technical support, including NCP4626DSN033T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP4626DSN033T1G requirements.
6.How does Aetrix verify that NCP4626DSN033T1G is sourced from the original manufacturer or authorized distributors?
All NCP4626DSN033T1G 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 NCP4626DSN033T1G meets industry standards.
7.What is the process for return or replacement of NCP4626DSN033T1G?
All NCP4626DSN033T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP4626DSN033T1G, 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 NCP4626DSN033T1G part is unused and in its original packaging.
Return procedure for NCP4626DSN033T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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