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onsemi NCP605MN15T2G
- Part No.:
- NCP605MN15T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCP605MN15T2G.pdf
- Description:
- IC REG LINEAR 1.5V 500MA 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,605
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Product details
Overview
NCP605MN15T2G from onsemi is a fixed-output 1.5 V, 500 mA low-dropout (LDO) linear regulator in DFN6 3×3.3 mm package, featuring 1.5% output voltage tolerance, 290 mV typical dropout at 500 mA, and 62 dB PSRR at 120 Hz - designed for space-constrained portable battery-powered systems such as notebook computers and hard disk drivers.
For engineers reviewing the NCP605MN15T2G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 500 mA output current with low ground current (145 µA typ), thermal shutdown at 175°C, ESD robustness (4 kV HBM), and compatibility with low-ESR ceramic capacitors without stability constraints.
Technical Context
The NCP605MN15T2G implements a CMOS-based LDO architecture with internal current limiting (675 mA), thermal shutdown, and precision bandgap reference. It operates across 1.5 V to 6.0 V input range and delivers stable 1.5 V output with no enable pin - distinguishing it from the NCP606 series.
Its fixed-output configuration connects the SENSE/ADJ pin directly to the output capacitor, eliminating external resistor networks. The device achieves low noise (50 µVrms) without bypass capacitors and maintains regulation under load transients up to 500 mA with minimal overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% over −40°C to +85°C - ensures stable core logic supply for low-voltage microcontrollers and memory interfaces. |
| Max Output Current | 500 mA continuous - supports single-rail power for USB peripherals, sensor hubs, and SSD controller ICs. |
| Dropout Voltage | 290 mV typ at 500 mA - enables operation from 1.79 V input, suitable for single-cell Li-ion or Li-poly battery discharge profiles. |
| Ground Current | 145 µA typ (independent of load) - minimizes quiescent power loss in always-on subsystems like real-time clocks or wake-up circuits. |
| PSRR | 62 dB at 120 Hz - suppresses ripple from switching DC-DC pre-regulators feeding the LDO input. |
| Noise Voltage | 50 µVrms (10 Hz–100 kHz) - meets low-noise requirements for analog signal chains, ADC references, and RF bias rails. |
| Thermal Shutdown | 175°C activation with 10°C hysteresis - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
Package: DFN6 3.0×3.3 mm, 0.95 mm pitch, exposed pad (EPAD) connected to GND (Case 506AX). RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 (Vin) | Positive Power Supply Input | Must be externally shorted; supplies pass transistor gate drive and internal bias - dual-pin layout reduces IR drop at high current. |
| 2 (GND) | Power Supply Ground | Primary return path for load current and internal circuitry; ties to EPAD for optimal thermal conduction. |
| 3 (NC) | No Connect | Internally unconnected - must remain floating; not usable as enable or feedback node. |
| 4 (Vout) | Regulated Output Voltage | Delivers 1.5 V to load; requires ≥1 µF ceramic capacitor placed adjacent to pin for transient stability. |
| 5 (SENSE/ADJ) | Output Voltage Sense Input | Connected directly to Vout capacitor in fixed mode - enables precise output monitoring without external resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Low IGND independent of load | 145 µA typical - eliminates load-dependent quiescent current drift, critical for battery runtime prediction. |
| Enhanced ESD protection | 4 kV HBM / 200 V MM - withstands handling and board-level ESD events without functional degradation. |
| No minimum ESR requirement | Stable with 1 µF ceramic capacitors - simplifies BOM and layout by removing tantalum or polymer capacitor dependencies. |
| Short-circuit & thermal protection | Auto-recovery current limit (675 mA) and 175°C shutdown - prevents permanent damage during fault conditions. |
| High PSRR at low frequency | 62 dB @ 120 Hz - rejects ripple from AC-DC adapters or buck converter switching artifacts upstream. |
Applications
| Hard Disk Drive Power Management | Notebook Computer Core Logic Rail |
|---|---|
|
Use Scenario: Supplies 1.5 V to HDD servo controller ASICs and spindle motor driver logic during spin-up and seek operations. IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean, stable voltage to timing-critical digital blocks. Use Value: 50 µVrms noise and 62 dB PSRR prevent bit errors caused by supply-induced jitter in read/write channel timing recovery. |
Use Scenario: Powers DDR3/DDR4 memory termination voltage (VTT) or low-power I/O buffers in ultrabook platforms. IC Role / Device Role / Timing Role: Fixed-output LDO providing regulated 1.5 V rail with fast transient response to burst memory access loads. Use Value: 290 mV dropout enables use with 1.8 V intermediate bus, extending battery life while maintaining compliance with JEDEC VTT tolerances. |
| Portable Instrumentation Sensor Bias | USB-C Peripheral Power Rail |
|
Use Scenario: Generates precision 1.5 V reference for analog front-end amplifiers and 16-bit SAR ADCs in handheld multimeters. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source ensuring measurement accuracy across temperature and battery discharge cycles. Use Value: 1.5% output tolerance and <±10 mV load regulation over 1–500 mA ensure consistent ADC full-scale calibration without software compensation. |
Use Scenario: Provides 1.5 V auxiliary power to USB-C PD controller logic and CC line interface circuitry in portable docks. IC Role / Device Role / Timing Role: Always-on LDO supporting hot-plug detection and policy engine operation during USB enumeration. Use Value: 145 µA ground current and no-enable architecture reduce standby power, enabling multi-week dock battery life in energy-harvesting designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP8345MFX-1.5/NOPB | Pin-compatible 1.5 V LDO with 300 mA rating and higher 350 mV dropout; lacks thermal shutdown. | Lower current capacity limits use in high-transient loads; absence of thermal protection requires external fault management. | Select only if system-level thermal control exists and peak load remains ≤300 mA. |
| NCP1117ST15T3G | 1.5 V adjustable variant with 1 A rating, TO-220/SOT-223 package, 1.2 V dropout, but 10× higher ground current (1.5 mA). | Larger footprint and higher quiescent draw make it unsuitable for compact, battery-sensitive designs. | Prefer for high-current, non-portable applications where thermal mass mitigates dropout heating. |
Compared with LP8345MFX-1.5/NOPB, NCP605MN15T2G offers 67% higher current capability and integrated thermal protection; versus NCP1117ST15T3G, it reduces ground current by 90% and cuts board area by >95%, enabling ultra-thin mobile form factors.
Availability
NCP605MN15T2G is available at Aetrix Electronics and suitable for notebook computers, hard disk drivers, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP605MN15T2G 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 sensing solutions for automotive, industrial, and consumer markets.
The NCP605MN15T2G belongs to onsemi's NCP605/NCP606 family of low-IGND, high-PSRR LDOs engineered specifically for portable battery-powered electronics demanding ultra-low quiescent current and small-footprint packaging.
FAQ
What is the maximum input voltage for the NCP605MN15T2G?
The NCP605MN15T2G supports an absolute maximum input voltage of 6.5 V, but its recommended operating range is 1.5 V to 6.0 V. Operation below 1.5 V risks dropout failure, while exceeding 6.0 V may trigger thermal shutdown or degrade long-term reliability. For 1.5 V output, minimum valid input is 1.79 V (1.5 V + 290 mV dropout).
Does the NCP605MN15T2G require an enable signal to operate?
No, the NCP605MN15T2G has no enable pin - Pin 3 is NC (no connect) and must remain unconnected. It powers up automatically when valid input voltage is applied. This differs from the NCP606 series, which uses Pin 3 as an active-high enable. The NCP605MN15T2G is always-on unless input is removed.
Can the NCP605MN15T2G be used with ceramic output capacitors?
Yes, the NCP605MN15T2G is fully stable with low-ESR ceramic capacitors as small as 1 µF - no minimum ESR requirement. This eliminates need for bulkier tantalum or aluminum electrolytic capacitors. Place the 1 µF ceramic capacitor within 2 mm of Pins 4 (Vout) and 2 (GND) for optimal transient response.
What is the thermal resistance of the NCP605MN15T2G in standard layout?
In a standard layout with 645 mm² of 1 oz copper on FR4, the NCP605MN15T2G exhibits 75°C/W junction-to-ambient thermal resistance (RJA). With ambient temperature at 25°C and maximum junction temperature limited to 125°C, this allows up to 1.3 W power dissipation - sufficient for 500 mA at 2.6 V input (1.1 V dropout × 0.5 A = 0.55 W).
How does the NCP605MN15T2G handle short-circuit conditions?
The NCP605MN15T2G features foldback current limiting that caps output current at 675 mA and activates thermal shutdown at 175°C. During sustained short-circuit, it cycles between current limit and thermal shutdown to prevent damage. Recovery is automatic once fault clears and junction temperature falls below 165°C (10°C hysteresis).
NCP605MN15T2G 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):
- 1.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.36V @ 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)
NCP605MN15T2G FAQ
1.How can I place an order for NCP605MN15T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP605MN15T2G 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 NCP605MN15T2G reliable?
The price and inventory of NCP605MN15T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP605MN15T2G is usually 5 days.
3.What payment methods are accepted for NCP605MN15T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP605MN15T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP605MN15T2G?
NCP605MN15T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP605MN15T2G 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 NCP605MN15T2G?
For technical support, including NCP605MN15T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP605MN15T2G requirements.
6.How does Aetrix verify that NCP605MN15T2G is sourced from the original manufacturer or authorized distributors?
All NCP605MN15T2G 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 NCP605MN15T2G meets industry standards.
7.What is the process for return or replacement of NCP605MN15T2G?
All NCP605MN15T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP605MN15T2G, 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 NCP605MN15T2G part is unused and in its original packaging.
Return procedure for NCP605MN15T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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