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onsemi NCP605MN28T2G
- Part No.:
- NCP605MN28T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCP605MN28T2G.pdf
- Description:
- IC REG LINEAR 2.8V 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,821
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Product details
Overview
NCP605MN28T2G from onsemi is a fixed-output 2.8 V, 500 mA low-dropout (LDO) linear regulator in DFN6 3×3.3 mm package, featuring 1.5% output voltage tolerance, 170 mV typical dropout at 500 mA, and 50 µVRMS output noise without bypass capacitor. It serves as a stable power source for battery-powered portable electronics requiring low ground current and high PSRR.
For engineers reviewing the NCP605MN28T2G datasheet, pinout, applications, or equivalent options, key selection criteria include dropout performance at 500 mA load, thermal shutdown threshold (175°C), ESD robustness (4 kV HBM), compatibility with ceramic output capacitors ≥1 µF, and absence of enable functionality - distinguishing it from the NCP606 series.
Technical Context
The NCP605MN28T2G uses a CMOS-based pass transistor architecture with internal current limiting (675 mA) and thermal shutdown (175°C). Its fixed 2.8 V output is set internally, eliminating external resistor networks and simplifying layout for space-constrained designs.
It operates across an input range of 1.5 V to 6.0 V, supports full 500 mA output current with ≤30 mV load regulation, and delivers 62 dB PSRR at 120 Hz - critical for noise-sensitive analog and RF subsystems powered from noisy DC-DC rails or battery sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8 V ±2% over −40°C to +125°C ambient; ensures stable core/peripheral rail for 2.8 V logic and sensors. |
| Max Output Current | 500 mA continuous; sufficient for microcontrollers, PMICs, and interface ICs in portable systems. |
| Dropout Voltage | 190 mV typical at 500 mA (VIN = 3.0 V); enables operation from single-cell Li-ion (3.0–4.2 V) or 3.3 V pre-regulated rails. |
| Ground Current | 145–180 µA (load-independent); minimizes quiescent power loss in always-on battery backup circuits. |
| PSRR @ 120 Hz | 62 dB; suppresses ripple from switching converters feeding the LDO input, reducing need for additional filtering. |
| Output Noise | 50 µVRMS (10 Hz–100 kHz); suitable for ADC references, RF synthesizers, and precision analog front-ends. |
| Thermal Shutdown | 175°C activation with 10°C hysteresis; protects against sustained overload or poor PCB thermal design. |
Pinout & Package
Package: DFN6 3.0×3.3 mm, 0.95 mm pitch, exposed pad (EPAD) connected to GND (Case 506AX). Compatible with standard reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 (Vin) | Positive Power Supply Input | Must be externally shorted; dual-input configuration reduces trace inductance and improves transient response. |
| 2 (GND) | Power Ground | Primary ground return; connects to EPAD for optimal thermal and electrical performance. |
| 3 (NC) | No Connect | Internally unconnected; must remain floating - not tied to any net to avoid parasitic coupling. |
| 4 (Vout) | Regulated Output | Delivers 2.8 V to load; requires ≥1 µF ceramic capacitor placed adjacent to pin per layout guidelines. |
| 5 (SENSE) | Output Voltage Sense | Connected directly to Vout capacitor terminal; enables accurate remote sensing and tight load regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low IGND independent of load | 145–180 µA ensures predictable battery life in sleep modes, regardless of output current. |
| Enhanced ESD protection | 4 kV HBM / 200 V MM rating allows direct integration into handheld devices without external TVS diodes. |
| Stable with ceramic capacitors | Zero minimum ESR requirement eliminates need for tantalum or polymer caps, lowering BOM cost and size. |
| High PSRR at low frequency | 62 dB at 120 Hz rejects ripple from AC/DC adapters and buck converters feeding the input rail. |
| Thermal and short-circuit protection | Integrated shutdown at 175°C and 675 mA current limit prevent damage during fault conditions. |
Applications
| Hard Disk Drive Power Management | Notebook Computer Core Rail |
|---|---|
|
Use Scenario: Supplies regulated 2.8 V to HDD spindle motor driver ICs and servo control circuitry. IC Role / Device Role / Timing Role: Primary low-noise post-regulator converting 5 V or 3.3 V system rail to clean 2.8 V motor bias supply. Use Value: 50 µVRMS noise prevents jitter in motor commutation timing; 190 mV dropout enables operation during battery brownout events. |
Use Scenario: Powers 2.8 V I/O interfaces (e.g., SD card, eMMC, USB PHY) in ultraportable notebooks. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable voltage to high-speed digital interfaces with tight voltage margins. Use Value: ±2% output tolerance ensures compliance with JEDEC 2.8 V I/O specs; 62 dB PSRR isolates interface from noisy system power domains. |
| Battery-Powered Instrumentation | Portable Medical Sensors |
|
Use Scenario: Provides 2.8 V reference and analog supply for handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-noise, low-quiescent regulator powering precision ADCs, op-amps, and sensor signal chains. Use Value: 145 µA ground current extends battery life in multi-year deployments; ceramic-capacitor stability simplifies ruggedized PCB layout. |
Use Scenario: Supplies 2.8 V to wearable biosensors (ECG, SpO₂) operating from coin-cell or Li-poly batteries. IC Role / Device Role / Timing Role: Primary power stage for ultra-low-power analog front-end and BLE radio subsystems. Use Value: 170 mV dropout enables >90% battery utilization down to 2.9 V; 4 kV HBM withstands ESD events during clinical handling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8345MFX-2.8/NOPB | Pin-compatible but requires minimum 10 µA load; higher 250 µA ground current; no thermal shutdown. | Limited to non-critical, low-power applications where load current never drops to zero. | Select only if legacy LP8345 footprint reuse is mandatory and thermal safety is managed externally. |
| NCP606MN28T2G | Same package and 2.8 V output, but adds active-high EN pin and 0.1 µA disable current. | Suitable for power-gated subsystems requiring controlled startup/shutdown sequencing. | Choose when enable control is needed; note that NCP606 has slightly higher dropout (200 mV) and lower PSRR (60 dB). |
Compared with LP8345MFX-2.8/NOPB, NCP605MN28T2G offers superior thermal safety and lower quiescent current; compared with NCP606MN28T2G, it trades enable functionality for tighter dropout and simpler routing - ideal for always-on, space-constrained rails.
Availability
NCP605MN28T2G is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and battery-powered medical sensors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for NCP605MN28T2G 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 belongs to onsemi's low-noise, low-IGND LDO portfolio, designed specifically for battery-powered portable equipment where efficiency, small size, and noise immunity are critical.
FAQ
What is the maximum input voltage for the NCP605MN28T2G?
The absolute maximum input voltage for the NCP605MN28T2G 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 2.8 V output, Vin must exceed Vout + VDO (≥2.99 V typical), making it compatible with single-cell Li-ion (3.0–4.2 V) and 3.3 V pre-regulated supplies.
Does the NCP605MN28T2G require an enable signal to operate?
No, the NCP605MN28T2G does not have an enable function. Pin 3 is designated NC (No Connect) and must remain unconnected. This distinguishes it from the NCP606 series, which includes an active-high EN pin. The NCP605MN28T2G powers up automatically whenever valid input voltage is applied within its operating range.
Can the NCP605MN28T2G be used with ceramic output capacitors?
Yes, the NCP605MN28T2G is fully stable with ceramic output capacitors ≥1 µF and zero minimum ESR requirement. This eliminates reliance on tantalum or aluminum electrolytic capacitors, reducing board area, cost, and failure risk. Recommended part: Murata GRM219R71E105K (1 µF, 25 V, X7R, 0805).
What is the thermal shutdown behavior of the NCP605MN28T2G?
The NCP605MN28T2G activates thermal shutdown at approximately 175°C junction temperature and remains latched off until junction temperature falls by ~10°C (hysteresis). During shutdown, output is disabled and ground current drops to near-zero. Recovery is automatic upon cooling - no external reset is required. This protects against sustained overload or inadequate PCB copper area.
How does the SENSE pin function in the NCP605MN28T2G?
In the NCP605MN28T2G, the SENSE pin (Pin 5) is connected directly to the output capacitor's Vout terminal to enable remote voltage sensing. This compensates for IR drop across PCB traces, maintaining ±2% regulation accuracy at the load point even with 100 mΩ trace resistance - critical for high-current or long-trace applications.
NCP605MN28T2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.24V @ 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)
NCP605MN28T2G FAQ
1.How can I place an order for NCP605MN28T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP605MN28T2G 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 NCP605MN28T2G reliable?
The price and inventory of NCP605MN28T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP605MN28T2G is usually 5 days.
3.What payment methods are accepted for NCP605MN28T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP605MN28T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP605MN28T2G?
NCP605MN28T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP605MN28T2G 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 NCP605MN28T2G?
For technical support, including NCP605MN28T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP605MN28T2G requirements.
6.How does Aetrix verify that NCP605MN28T2G is sourced from the original manufacturer or authorized distributors?
All NCP605MN28T2G 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 NCP605MN28T2G meets industry standards.
7.What is the process for return or replacement of NCP605MN28T2G?
All NCP605MN28T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP605MN28T2G, 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 NCP605MN28T2G part is unused and in its original packaging.
Return procedure for NCP605MN28T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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