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onsemi NCP691MN15T2G
- Part No.:
- NCP691MN15T2G
- Manufacturer:
- onsemi
- Package:
- 6-VDFN Exposed Pad
- Datasheet:
-
NCP691MN15T2G.pdf
- Description:
- IC REG LINEAR 1.5V 1A 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:24,000
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Product details
Overview
NCP691MN15T2G from onsemi is a fixed-output 1.5 V, 1 A CMOS low-dropout (LDO) voltage regulator in a 6-lead DFN3x3 package, featuring ±2% output voltage tolerance over −40°C to 125°C, 190 mV dropout at 1 A (VOUT = 2.5 V), and active-low enable control. It delivers stable power to core logic rails in space-constrained portable systems with low quiescent current and high PSRR.
For engineers reviewing the NCP691MN15T2G datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed 1 A output under 1.5 V fixed regulation, EN-active-low timing behavior, thermal shutdown at 175°C, and compatibility with low-ESR ceramic capacitors for load transient stability in battery-powered DSP/FPGA boards.
Technical Context
The NCP691MN15T2G implements a PMOS pass transistor architecture with bandgap reference, internal current limiting, and thermal shutdown circuitry. Its fixed 1.5 V output is trimmed during production to ±2% accuracy across temperature and load, and it uses a dedicated SNS pin for remote output sensing to maintain regulation under PCB trace impedance.
It integrates active output discharge and supports operation from 1.5 V to 6.0 V input while maintaining regulation down to 190 mV dropout at full 1 A load (at VOUT = 2.5 V). The EN pin asserts low to disable the regulator, reducing ground current to ≤1 µA, and features hysteresis-free logic thresholds of 0.9 V (high) and 0.4 V (low).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.5 V ±2% over −40°C to 125°C - ensures stable core supply for 1.5 V I/O domains without external feedback components. |
| Max Output Current | 1 A continuous - supports single-rail powering of FPGA I/O banks or microprocessor subsystems without derating at TJ ≤ 125°C. |
| Dropout Voltage | 190 mV at 1 A (VOUT = 2.5 V), 290 mV at 1 A (VOUT = 1.5 V) - enables operation from 1.8 V input sources while sustaining full load. |
| Ground Current | 145 µA typical at 1 A load - minimizes standby power loss in always-on system management rails. |
| PSRR | 62 dB at 120 Hz, 55 dB at 1 kHz - suppresses switching noise from upstream DC/DC converters feeding the LDO input. |
| Noise Voltage | 50 µVrms (200 Hz–100 kHz) - meets low-noise requirements for analog sensor interfaces or RF bias supplies without bypass capacitor. |
| Enable Logic | Active-low EN with 0.4 V max threshold - compatible with standard 1.8 V/3.3 V GPIOs for sequenced power-up control. |
Pinout & Package
Package: DFN6 3×3 mm, 0.95 mm pitch, exposed thermal pad (Case 506AH, MN suffix). Pin 1 marked by notch or dot; pins 1 and 6 are parallel IN inputs requiring common connection for full 1 A capability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 6 | IN | Dual input voltage terminals - must be shorted externally to deliver full 1 A output current and minimize IR drop. |
| 2 | GND | Power ground connected to EPAD - soldering EPAD to ≥64 mm² copper improves thermal resistance from 169°C/W to 70°C/W. |
| 3 | EN | Active-low enable - pulled low disables regulator and reduces ground current to ≤1 µA; tied to VIN for always-on operation. |
| 4 | OUT | Regulated 1.5 V output - connects directly to load; requires ≥1 µF ceramic capacitor for stability. |
| 5 | SNS | Sense input - must be routed point-to-point to OUT pin to compensate for PCB trace voltage drop and maintain ±2% regulation accuracy. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | Internally discharges OUT pin when disabled - prevents floating voltage on downstream circuits during power sequencing. |
| Enhanced ESD Protection | 4 kV HBM / 200 V MM - withstands handling and board-level ESD events without latch-up or parametric shift. |
| Thermal Shutdown | 175°C trip with 10°C hysteresis - protects against sustained overload or poor heatsinking without requiring external thermal monitoring. |
| Low Noise Operation | 50 µVrms noise without bypass capacitor - eliminates need for secondary filtering in noise-sensitive analog signal chains. |
| Ceramic Capacitor Stability | Stable with ≥1 µF ceramic COUT - avoids costly tantalum or polymer capacitors and simplifies BOM for cost-sensitive designs. |
Applications
| Laptop Core Voltage Rail | FPGA I/O Bank Supply |
|---|---|
Use Scenario: Powering 1.5 V I/O banks on Xilinx Artix-7 or Intel Cyclone V FPGAs in ultraportable notebooks. IC Role / Device Role / Timing Role: Primary post-regulation LDO delivering clean, sequenced 1.5 V to FPGA I/O banks with EN-controlled power-up timing. Use Value: 190 mV dropout allows direct derivation from 1.8 V main rail; ±2% tolerance ensures compliance with FPGA VCCIO min/max specs across temperature. |
Use Scenario: Providing regulated 1.5 V to memory interface circuits (e.g., LPDDR2/3 I/O) on telecom baseband boards. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO supplying memory PHY voltage with fast load transient response (<50 µs recovery). Use Value: 50 µVrms noise and 62 dB PSRR prevent bit errors in high-speed memory links; active discharge clears bus lines during reset. |
| Portable Medical Sensor Hub | Industrial PLC Digital I/O Module |
Use Scenario: Powering ultra-low-power analog front-end ICs (e.g., ADS129x) and BLE SoCs in handheld ECG monitors. IC Role / Device Role / Timing Role: Main system LDO enabling battery-operated operation with <150 µA quiescent current and EN-controlled sleep mode. Use Value: 145 µA ground current at 1 A load extends battery life; thermal shutdown prevents overheating in sealed enclosures. |
Use Scenario: Supplying isolated 1.5 V logic rails for digital input conditioning circuits in DIN-rail mounted PLC modules. IC Role / Device Role / Timing Role: Robust, automotive-grade LDO (AEC-Q100 qualified variant available) supporting extended temperature operation. Use Value: −40°C to 125°C operating range and 175°C thermal cutoff ensure reliability in unventilated industrial cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2015PDBVR | 1.5 V fixed, 300 mA max, 165 mV dropout at 300 mA, no SNS pin, 25 µVrms noise | Lower current capacity; lacks remote sense for precision regulation under PCB IR drop | Select for cost-sensitive, low-current applications where SNS compensation is unnecessary. |
| NCP1117ST15T3G | 1.5 V fixed, 1 A, 1.2 V dropout at 800 mA, TO-220/SOT-223 package, no EN pin | Higher dropout limits input voltage flexibility; no enable control or active discharge | Select when board layout permits larger package and sequenced enable is not required. |
Compared with TPS7A2015PDBVR and NCP1117ST15T3G, the NCP691MN15T2G uniquely combines 1 A current, remote sensing (SNS), active-low EN, and active discharge in a 3×3 mm DFN-enabling compact, high-accuracy, and fully controllable 1.5 V regulation where space and sequencing matter.
Availability
NCP691MN15T2G is available at Aetrix Electronics and suitable for laptop power delivery, FPGA I/O supply, portable medical sensor hubs, and industrial PLC digital I/O modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCP691MN15T2G 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 NCP691MN15T2G belongs to the NCP69x CMOS LDO family, designed specifically for space-constrained, battery-powered applications demanding high PSRR, low noise, and robust thermal protection in miniature DFN packages.
FAQ
What is the maximum input voltage rating for the NCP691MN15T2G?
The NCP691MN15T2G has an absolute maximum input voltage (VIN) of 6.5 V. However, its recommended operating input range is 1.5 V to 6.0 V. Exceeding 6.5 V risks permanent damage, and operation below 1.5 V may fail to sustain regulation due to dropout constraints. For reliable 1.5 V output, minimum input is typically 1.79 V (1.5 V + 290 mV dropout).
Does the NCP691MN15T2G require an external resistor network for 1.5 V output?
No, the NCP691MN15T2G is a fixed-output LDO with factory-trimmed 1.5 V regulation - no external resistors are needed. Unlike adjustable variants (e.g., NCP691MNADJT2G), this part integrates internal feedback and delivers 1.5 V ±2% accuracy across temperature and load without external components.
How does the SNS pin improve regulation accuracy in the NCP691MN15T2G?
The SNS pin on the NCP691MN15T2G enables remote output sensing: it must be connected directly to the load-side of the OUT pin to compensate for voltage drop across PCB traces. This maintains ±2% output accuracy at the load, even with trace resistances up to ~50 mΩ, which would otherwise cause significant regulation error in high-current paths.
What thermal performance can be expected from the NCP691MN15T2G on a standard PCB?
On a standard FR4 board with 1 oz copper and 64 mm² thermal pad area, the NCP691MN15T2G exhibits RJA = 169°C/W. With 645 mm² copper, RJA drops to 70°C/W. At 1 A load and 190 mV dropout, power dissipation is ~190 mW - resulting in ~13°C junction rise above ambient with minimal copper, well within the −40°C to 125°C operating range.
Is the NCP691MN15T2G pin-compatible with other devices in the NCP69x family?
Yes, all NCP69x devices (NCP690/NCP691/NCP692/NCV8690) share identical DFN6 3×3 mm pinouts and footprint. However, EN logic polarity differs: NCP691MN15T2G uses active-low EN (pin 3), while NCP692 variants use active-high EN. Swapping them requires verifying EN signal polarity and updating firmware or logic levels accordingly.
NCP691MN15T2G 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):
- 0.41V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 200 µA
- Current - Supply (Max):
- 240 µA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-DFN (3x3)
NCP691MN15T2G FAQ
1.How can I place an order for NCP691MN15T2G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP691MN15T2G 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 NCP691MN15T2G reliable?
The price and inventory of NCP691MN15T2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP691MN15T2G is usually 5 days.
3.What payment methods are accepted for NCP691MN15T2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP691MN15T2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP691MN15T2G?
NCP691MN15T2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP691MN15T2G 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 NCP691MN15T2G?
For technical support, including NCP691MN15T2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP691MN15T2G requirements.
6.How does Aetrix verify that NCP691MN15T2G is sourced from the original manufacturer or authorized distributors?
All NCP691MN15T2G 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 NCP691MN15T2G meets industry standards.
7.What is the process for return or replacement of NCP691MN15T2G?
All NCP691MN15T2G units undergo pre-shipment inspection (PSI). If there is an issue with NCP691MN15T2G, 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 NCP691MN15T2G part is unused and in its original packaging.
Return procedure for NCP691MN15T2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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