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onsemi NCP605MN33T2G
- Part No.:
- NCP605MN33T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCP605MN33T2G.pdf
- Description:
- IC REG LINEAR 3.3V 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,883
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Product details
Overview
NCP605MN33T2G from onsemi is a fixed-output 3.3 V, 500 mA low-dropout linear regulator with CMOS architecture, no enable pin, and optimized for portable battery-powered systems. It delivers ±2% output voltage tolerance over −40°C to +125°C, achieves 170 mV dropout at 500 mA, and features 62 dB PSRR at 120 Hz - used in notebook computers and hard disk drive power rails.
For engineers reviewing the NCP605MN33T2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at full load, ground current stability across temperature, noise immunity in sensitive analog subsystems, and compatibility with low-ESR ceramic output capacitors without stability compensation.
Technical Context
The NCP605MN33T2G implements a PMOS pass transistor architecture enabling ultra-low ground current (145–180 µA) independent of load, eliminating efficiency degradation at light loads. Its internal reference and error amplifier maintain regulation with only 1.0 µF input and output ceramic capacitors.
Thermal shutdown activates at 175°C with 10°C hysteresis, and short-circuit protection limits output current to 700–1350 mA. The device operates across 1.5–6.0 V input range and supports ambient temperatures from −40°C to +125°C without derating up to 500 mA output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3 V ±2% over −40°C to +125°C, ensuring stable MCU core or I/O rail supply without external feedback. |
| Max Output Current | 500 mA continuous; current limit set at 675 mA to protect against sustained overload while maintaining regulation. |
| Dropout Voltage | 170 mV at 500 mA (VIN = 3.47 V), enabling operation from single-cell Li-ion or 3.6 V supply with margin. |
| PSRR @ 120 Hz | 62 dB - suppresses switching noise from upstream DC-DC converters feeding the LDO input. |
| Output Noise | 50 µVRMS (10 Hz–100 kHz), suitable for powering RF transceivers or precision ADCs without added bypassing. |
| Ground Current | 145–180 µA across load (1–500 mA), enabling >99% efficiency at light loads in always-on subsystems. |
| Thermal Shutdown | Triggers at 175°C junction temperature with 10°C hysteresis, preventing permanent damage during transient overloads. |
Pinout & Package
Package: DFN6 3.0×3.3 mm, 0.95 mm pitch, exposed thermal pad (EPAD) connected to GND per Case 506AX. Pin 1 and Pin 6 are both Vin and must be externally shorted for full 500 mA capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 Vin | Positive power supply input | Dual-input configuration reduces trace resistance and IR drop; both pins must be connected to input rail for rated current. |
| 2 GND | Power ground reference | Primary return path for load and bias currents; connects to EPAD for optimal thermal conduction. |
| 3 NC | No connect | Unbonded pad - must remain floating; not usable as enable or any other function. |
| 4 Vout | Regulated output voltage | Delivers stable 3.3 V to downstream logic; requires ≥1.0 µF ceramic capacitor placed adjacent to pin. |
| 5 SENSE/ADJ | Output voltage sense input | Connected directly to Vout capacitor for fixed versions; enables remote sensing or adjustable configuration if reconfigured. |
Key Features
| Feature | Design Value |
|---|---|
| Low IGND independent of load | 145–180 µA across 1–500 mA output enables >99% light-load efficiency in battery systems. |
| Enhanced ESD robustness | 4 kV HBM / 200 V MM rating allows direct handling in assembly without additional protection circuitry. |
| No minimum ESR requirement | Stable with 1.0 µF ceramic capacitors - eliminates need for costly tantalum or polymer caps and simplifies BOM. |
| High PSRR at low frequency | 62 dB at 120 Hz rejects ripple from AC-DC adapters or buck converter switching artifacts. |
| Fast startup time | 15 µs turn-on (for 3.3 V version) ensures rapid system wake-up from deep sleep states. |
Applications
| Hard Disk Drive Power Rail | Notebook Computer Core Logic |
|---|---|
|
Use Scenario: Supplies regulated 3.3 V to HDD servo controller ICs and interface logic requiring low noise and fast transient response. IC Role / Device Role / Timing Role: Primary post-regulator delivering clean, stable voltage to timing-critical storage subsystems. Use Value: 50 µVRMS noise and 62 dB PSRR prevent bit errors during high-speed data transfer; 170 mV dropout enables use with aging battery packs. |
Use Scenario: Powers CPU I/O buffers and chipset interfaces in ultraportable notebooks where board space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Fixed-output LDO providing decoupled 3.3 V domain for high-speed digital interfaces (SATA, PCIe). Use Value: 145–180 µA ground current minimizes standby power draw; DFN6 package fits tight layout constraints near BGA processors. |
| Battery-Powered Instrumentation | Portable Medical Sensors |
|
Use Scenario: Powers microcontroller peripherals and analog front-end circuits in handheld test equipment operating from single-cell Li-ion. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator supplying precision ADC reference and signal chain bias rails. Use Value: 1.5% initial tolerance and <±2% variation over temperature ensure measurement accuracy; thermal shutdown prevents field failures. |
Use Scenario: Delivers 3.3 V to low-power biosensor signal conditioning and BLE radio modules in wearable health monitors. IC Role / Device Role / Timing Role: Always-on power source for sensor fusion subsystems requiring long battery life and reliability. Use Value: No-enable architecture eliminates control logic complexity; Pb-free DFN6 meets medical RoHS compliance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8345MFX-3.3/NOPB | Pin-compatible but requires minimum 10 mA load; higher 250 µA quiescent current; no thermal shutdown. | Legacy design reuse where load current never drops below 10 mA; unsuitable for ultra-low-power sleep modes. | Select only if existing LP8345 footprint and load profile match; verify thermal management externally. |
| MCP1700T-3302E/TT | 250 mA max output; 6 µA quiescent current; 350 mV dropout at 250 mA; no current limit or thermal shutdown. | Ultra-low-power sensor nodes with sub-100 mA peak loads; cannot replace NCP605MN33T2G in 500 mA applications. | Use only for cost-sensitive, low-current designs where 500 mA capability and protection features are unnecessary. |
Compared with LP8345MFX-3.3/NOPB and MCP1700T-3302E/TT, the NCP605MN33T2G provides higher output current, integrated thermal/current protection, and lower ground current - making it the preferred choice for modern portable electronics demanding reliability and efficiency across full load range.
Availability
NCP605MN33T2G is available at Aetrix Electronics and suitable for notebook computers, hard disk drives, and portable instrumentation requiring stable component supply with guaranteed long-term availability and Pb-free compliance.
Supply support for NCP605MN33T2G 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 sensor solutions for automotive, industrial, and portable electronics.
The NCP605 series was designed specifically for space-constrained, battery-powered applications requiring high PSRR, low noise, and minimal quiescent current - targeting next-generation mobile computing and storage platforms.
FAQ
What is the maximum input voltage for the NCP605MN33T2G?
The absolute maximum input voltage for the NCP605MN33T2G is 6.5 V, but the recommended operating range is 1.5 V to 6.0 V. Operation below 1.5 V or above 6.0 V risks failure or degraded regulation. For reliable 3.3 V output, minimum input must exceed 3.47 V (3.3 V + 170 mV dropout) at 500 mA load.
Does the NCP605MN33T2G require an enable signal to operate?
No, the NCP605MN33T2G has no enable pin - Pin 3 is internally unconnected (NC). It powers up automatically when valid input voltage is applied. This simplifies design for always-on applications. If enable functionality is required, the pin-compatible NCP606MN33T2G should be selected instead.
Can the NCP605MN33T2G be used with ceramic output capacitors?
Yes, the NCP605MN33T2G is fully stable with 1.0 µF or larger ceramic capacitors and does not require minimum ESR. This eliminates the need for bulkier, higher-ESR tantalum or aluminum electrolytic capacitors - reducing board area and cost while improving transient response.
What is the thermal shutdown behavior of the NCP605MN33T2G?
The NCP605MN33T2G activates thermal shutdown at approximately 175°C junction temperature and remains latched off until junction temperature falls by ~10°C (hysteresis). Once cooled, it resumes regulation automatically without external reset. This protects against permanent damage during sustained overload or poor PCB thermal design.
How does the ground current of the NCP605MN33T2G vary with load?
The ground current of the NCP605MN33T2G remains nearly constant at 145–180 µA across the full 1–500 mA output range - a key advantage of its CMOS architecture. This independence from load current maximizes efficiency in battery-powered systems where light-load operation dominates duty cycle.
NCP605MN33T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.22V @ 500mA
- Current - Output:
- 500mA
- Current - Quiescent (Iq):
- 180 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (3x3.3)
NCP605MN33T2G FAQ
1.How can I place an order for NCP605MN33T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP605MN33T2G 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 NCP605MN33T2G reliable?
The price and inventory of NCP605MN33T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP605MN33T2G is usually 5 days.
3.What payment methods are accepted for NCP605MN33T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP605MN33T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP605MN33T2G?
NCP605MN33T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP605MN33T2G 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 NCP605MN33T2G?
For technical support, including NCP605MN33T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP605MN33T2G requirements.
6.How does Aetrix verify that NCP605MN33T2G is sourced from the original manufacturer or authorized distributors?
All NCP605MN33T2G 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 NCP605MN33T2G meets industry standards.
7.What is the process for return or replacement of NCP605MN33T2G?
All NCP605MN33T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP605MN33T2G, 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 NCP605MN33T2G part is unused and in its original packaging.
Return procedure for NCP605MN33T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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