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onsemi NCP605MN25T2G
- Part No.:
- NCP605MN25T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCP605MN25T2G.pdf
- Description:
- IC REG LINEAR 2.5V 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,460
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Product details
Overview
NCP605MN25T2G from onsemi is a fixed-output 2.5 V, 500 mA low-dropout (LDO) linear regulator in DFN6 3×3.3 mm package, featuring 1.5% output voltage tolerance, 250 mV typical dropout at 500 mA, and 50 µVRMS output noise without bypass capacitor. It delivers stable power to core logic rails in space-constrained portable electronics.
For engineers reviewing the NCP605MN25T2G datasheet, pinout, applications, or equivalent options, key selection criteria include its enable-free operation, low ground current (145–180 µA), high PSRR (62 dB @ 120 Hz), thermal shutdown at 175°C, and compatibility with low-ESR ceramic output capacitors.
Technical Context
The NCP605MN25T2G employs a PMOS pass transistor architecture enabling ultra-low ground current independent of load, and integrates internal current limiting (675 mA) and thermal shutdown circuitry. Its feedback loop uses a precision 1.25 V reference with SENSE/ADJ pin tied directly to VOUT for fixed-voltage operation.
No enable functionality is included-pin 3 is NC-making it suitable for always-on rail generation. The device operates across −40°C to +125°C ambient temperature, supports input voltages from 1.5 V to 6.0 V, and maintains regulation with <30 mV load regulation over 1–500 mA output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2% over −40°C to +85°C; ensures stable core supply for 2.5 V logic interfaces. |
| Max Output Current | 500 mA continuous; sufficient for microcontroller cores, FPGAs I/O banks, and sensor signal chains. |
| Dropout Voltage | 250 mV typical at 500 mA; enables operation from 2.75 V input while maintaining 2.5 V output. |
| Ground Current | 145–180 µA over full load range; minimizes quiescent power loss in battery-powered systems. |
| PSRR | 62 dB @ 120 Hz, 55 dB @ 1 kHz; suppresses ripple from noisy switching supplies feeding the LDO input. |
| Output Noise | 50 µVRMS (10 Hz–100 kHz); eliminates need for external noise-reduction capacitor in analog-sensitive circuits. |
| Thermal Shutdown | Activates at 175°C 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 per Case 506AX. RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 | Vin | Positive input supply; pins 1 and 6 must be externally shorted for full 500 mA capability. |
| 2, EPAD | GND | Power ground and thermal path; EPAD soldering required for thermal performance and current rating. |
| 3 | NC | No connection; not internally bonded-must remain unconnected on PCB. |
| 4 | Vout | Regulated 2.5 V output; connects directly to load and output capacitor (min 1 µF ceramic). |
| 5 | SENSE/ADJ | Voltage sense input; tied directly to Vout for fixed 2.5 V operation (no resistor divider needed). |
Key Features
| Feature | Design Value |
|---|---|
| Low IGND independent of load | 145–180 µA across 0–500 mA output; extends battery life in always-on portable instrumentation. |
| High PSRR at low frequency | 62 dB @ 120 Hz; rejects ripple from AC/DC adapters or buck converter second-stage inputs. |
| Enhanced ESD robustness | 4 kV HBM, 200 V MM; improves manufacturing yield and field reliability in handling-sensitive environments. |
| No minimum load requirement | Stable regulation down to 0 mA; eliminates need for dummy load resistors in low-power sleep modes. |
| Thermal protection with hysteresis | Shuts down at 175°C, restarts at 165°C; prevents thermal runaway during transient overloads. |
Applications
| Hard Disk Drive Power Management | Notebook Computer Core Rails |
|---|---|
|
Use Scenario: Providing clean 2.5 V supply to HDD preamplifier ICs and servo control logic. IC Role / Device Role / Timing Role: Primary low-noise post-regulator after main DC/DC converter. Use Value: 50 µVRMS noise prevents bit-error-rate degradation in high-density magnetic read channels. |
Use Scenario: Powering DDR2/DDR3 memory termination voltage (VTT) or chipset I/O rails. IC Role / Device Role / Timing Role: Fixed-output LDO delivering stable 2.5 V with fast load transient response. Use Value: 30 mV load regulation and 250 mV dropout enable efficient use of shared 3.3 V system bus. |
| Battery-Powered Portable Instrumentation | Industrial Sensor Signal Conditioning |
|
Use Scenario: Supplying 2.5 V reference and analog front-end circuitry in handheld multimeters. IC Role / Device Role / Timing Role: Low-quiescent, low-noise bias source for precision ADCs and op-amps. Use Value: 145 µA ground current extends alkaline battery life beyond 100 hours in active measurement mode. |
Use Scenario: Powering 2.5 V rail for bridge-sensor amplifiers and 24-bit sigma-delta ADCs in process transmitters. IC Role / Device Role / Timing Role: Precision voltage source with tight 2% tolerance and low thermal drift. Use Value: 1.25 V reference-based architecture ensures <±0.025 V output shift over −40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8345MFX-2.5/NOPB | Pin-compatible but requires minimum 10 mA load; higher 250 µA quiescent current; no thermal shutdown. | Limited to non-battery applications where constant load exists; unsuitable for zero-load sleep states. | Select only if legacy LP8345 footprint reuse is mandatory and thermal protection is handled externally. |
| MCP1700T-2502E/MB | 250 mA max output; 6 µA quiescent; no current limit or thermal shutdown; SOT-23-5 package. | Targeted at ultra-low-power microcontrollers-not suitable for 500 mA loads or harsh thermal environments. | Choose only for sub-100 mA applications prioritizing nanoamp quiescent over protection features. |
Compared with LP8345MFX-2.5/NOPB and MCP1700T-2502E/MB, the NCP605MN25T2G uniquely combines 500 mA output, integrated thermal/current protection, zero-load stability, and industry-leading PSRR in a thermally enhanced DFN package-making it optimal for portable and industrial 2.5 V rail generation where reliability and efficiency are co-prioritized.
Availability
NCP605MN25T2G is available at Aetrix Electronics and suitable for notebook computers, portable instrumentation, and industrial sensor nodes requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for NCP605MN25T2G 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, automotive, industrial, and cloud power solutions.
The NCP605MN25T2G belongs to onsemi's NCP605/NCP606 family of low-IGND, high-PSRR LDOs designed specifically for space-constrained, battery-powered portable electronics demanding low noise and robust thermal protection.
FAQ
What is the maximum input voltage for the NCP605MN25T2G?
The NCP605MN25T2G supports an absolute maximum input voltage of 6.5 V, but its recommended operating input range is 1.5 V to 6.0 V. For reliable 2.5 V regulation at 500 mA, Vin must exceed Vout + VDO = 2.75 V; operation below this risks dropout. The device includes overvoltage protection on Vin per absolute maximum ratings.
Does the NCP605MN25T2G require an external enable signal?
No-the NCP605MN25T2G has no enable function. Pin 3 is marked NC (not connected) and must remain unconnected on the PCB. This distinguishes it from the NCP606 series, which includes an active-high EN pin. The NCP605MN25T2G powers up automatically when valid input voltage is applied.
What output capacitor value is required for stable operation of the NCP605MN25T2G?
A minimum 1.0 µF ceramic capacitor is required at the Vout pin, placed as close as possible to the device. Larger values (e.g., 10 µF) improve load transient response and noise rejection. Unlike many LDOs, the NCP605MN25T2G does not require a minimum ESR and remains stable with X5R/X7R MLCCs, including Murata GRM219R71E105K.
How does the NCP605MN25T2G handle thermal overload conditions?
The NCP605MN25T2G incorporates an internal thermal shutdown circuit that activates at approximately 175°C junction temperature and includes 10°C hysteresis-re-enabling output only after cooling to ~165°C. This protects against sustained overloads or inadequate PCB copper area, and is fully specified in the Thermal Characteristics table of the datasheet.
Is the NCP605MN25T2G compatible with lead-free reflow processes?
Yes-the NCP605MN25T2G is a Pb-free device packaged in a DFN6 3×3.3 mm RoHS-compliant outline (Case 506AX). It is qualified for standard lead-free reflow profiles per J-STD-020, with peak temperatures up to 260°C. The exposed pad must be soldered to a thermal land for both mechanical integrity and thermal performance.
NCP605MN25T2G 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 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)
NCP605MN25T2G FAQ
1.How can I place an order for NCP605MN25T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP605MN25T2G 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 NCP605MN25T2G reliable?
The price and inventory of NCP605MN25T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP605MN25T2G is usually 5 days.
3.What payment methods are accepted for NCP605MN25T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP605MN25T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP605MN25T2G?
NCP605MN25T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP605MN25T2G 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 NCP605MN25T2G?
For technical support, including NCP605MN25T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP605MN25T2G requirements.
6.How does Aetrix verify that NCP605MN25T2G is sourced from the original manufacturer or authorized distributors?
All NCP605MN25T2G 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 NCP605MN25T2G meets industry standards.
7.What is the process for return or replacement of NCP605MN25T2G?
All NCP605MN25T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP605MN25T2G, 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 NCP605MN25T2G part is unused and in its original packaging.
Return procedure for NCP605MN25T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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