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onsemi NCP694DSAN12T1G
- Part No.:
- NCP694DSAN12T1G
- Manufacturer:
- onsemi
- Package:
- 6-VQFN Exposed Pad
- Datasheet:
-
NCP694DSAN12T1G.pdf
- Description:
- IC REG LINEAR 1.2V 1A 6HSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,718
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Product details
Overview
NCP694DSAN12T1G from onsemi is a 1.2 V fixed-output, 1 A CMOS low-dropout linear voltage regulator in HSON-6 package, featuring ultra-low standby current (≤1.0 µA), −3 mV load regulation at 1 A, and built-in auto-discharge function for rapid output discharge during shutdown. It serves as a precision power supply for battery-powered portable electronics requiring stable low-voltage rails.
For engineers reviewing the NCP694DSAN12T1G datasheet, pinout, applications, or equivalent options, key selection considerations include dropout voltage at 1 A (0.56 V), enable threshold logic compatibility (VTH,CE = 1.0 V high / 0.4 V low), thermal shutdown (150°C), and Pb-free HSON-6 packaging with exposed pad for thermal performance.
Technical Context
The NCP694DSAN12T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, current-limit circuitry, and thermal shutdown protection. Its D-version architecture includes an integrated auto-discharge transistor tied to the CE pin, enabling fast VOUT discharge when disabled - a critical feature for systems requiring controlled power sequencing.
Designed for high-current portable applications, it operates from 1.4 V to 6.0 V input, delivers 1.2 V ±3% output accuracy over temperature (−40°C to +85°C), and maintains stability with 4.7 µF ceramic or tantalum output capacitors. The HSON-6 package provides low thermal resistance (RJA = 111 °C/W) under standard PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.2 V ±3% (0.97–1.03×VREF, VREF = 1.0 V); tight tolerance ensures reliable core voltage for low-power MCUs and sensors. |
| Max Output Current | 1 A continuous; supports high-current digital loads like ARM Cortex-M4 subsystems or RF transceivers without derating at room temperature. |
| Dropout Voltage | 0.56 V at 1 A (typical); enables operation down to VIN = 1.76 V while maintaining regulation - critical for single-cell Li-ion (2.7–4.2 V) or LiFePO4 (2.0–3.6 V) systems. |
| Load Regulation | −3 mV (IOUT = 1 mA → 1 A); minimal output shift under dynamic load steps improves ADC reference stability and analog signal integrity. |
| Standby Current | ≤1.0 µA (VCE = 0 V, VIN = 6.0 V); extends battery life in always-on sensor nodes or real-time clock backup circuits. |
| PSRR | 70 dB @ 1 kHz; suppresses switching noise from upstream DC-DC converters, reducing need for additional filtering in mixed-signal designs. |
| Thermal Shutdown | 150°C with 30°C hysteresis; prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
HSON-6 package (Case 506AE): 2.9 mm × 3.0 mm × 0.7–0.9 mm body with 0.95 mm pitch, exposed thermal pad (D2 = 1.4–1.6 mm), and coplanar terminals for reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VOUT | Dual parallel output pins reduce trace resistance and improve current sharing; mandatory for 1 A operation per datasheet layout guidance. |
| 3 | ADJ / NC | No connection for fixed-output NCP694DSAN12T1G; must be left floating or grounded - not used for feedback. |
| 4 | GND | Power ground return; connects directly to exposed thermal pad for optimal heat dissipation and low-noise reference. |
| 5 | CE | Active-high enable; pulls VOUT low and activates auto-discharge when driven <0.4 V; tie to VIN if unused. |
| 6 | VIN | Input supply (1.4–6.0 V); requires local 4.7 µF decoupling capacitor placed within 2 mm of pin per layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Integrated NMOS transistor discharges VOUT rapidly upon CE deactivation - eliminates hold-up time in power-gated subsystems. |
| Ultra-low standby current | ≤1.0 µA enables >10-year battery life in coin-cell-powered IoT endpoints with periodic wake-up cycles. |
| PMOS pass element | Eliminates ground current dependency on load; supply current remains constant (60–100 µA) regardless of output loading. |
| Pb-free HSON-6 package | RoHS-compliant, thermally enhanced surface-mount package with exposed pad for direct PCB thermal coupling. |
| Robust protection suite | Includes current limiting (250 mA short-circuit), thermal shutdown (150°C), and ESD rating >2 kV HBM - reduces external protection components. |
Applications
| Wearable Health Monitors | Industrial Sensor Nodes |
|---|---|
|
Use Scenario: Continuous ECG/PPG signal acquisition powered by CR2032 or Li-SOCl2 primary cell. IC Role / Device Role / Timing Role: Primary 1.2 V LDO supplying ultra-low-noise analog front-end and BLE SoC core domain. Use Value: 30 µVRMS output noise and 70 dB PSRR preserve SNR in 24-bit delta-sigma ADCs; auto-discharge prevents leakage into disconnected electrodes. |
Use Scenario: Wireless vibration sensor node deployed in factory machinery with 10-year battery target. IC Role / Device Role / Timing Role: Always-on 1.2 V rail for microcontroller RTC, accelerometer, and LoRaWAN transceiver sleep-mode logic. Use Value: ≤1.0 µA standby current extends CR123A battery life beyond 12 years; thermal shutdown protects against enclosure overheating in sealed enclosures. |
| Portable Medical Imaging | Automotive Cabin Sensors |
|
Use Scenario: Handheld ultrasound probe using single-cell Li-ion battery and FPGA-based beamforming. IC Role / Device Role / Timing Role: Secondary 1.2 V supply for FPGA core voltage, replacing inefficient DC-DC due to strict noise requirements. Use Value: 0.56 V dropout enables full utilization of battery range (down to 1.76 V); dual VOUT pins handle 1 A FPGA core current without IR drop. |
Use Scenario: Occupancy detection module inside automotive A-pillar with ambient temperature range −40°C to +85°C. IC Role / Device Role / Timing Role: Regulated 1.2 V source for MEMS microphone bias and CAN FD transceiver I/O domain. Use Value: Guaranteed operation across full industrial temp range; 111 °C/W RJA allows use on 1-layer FR4 without heatsink in confined space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0512PDBVR | 1.2 V, 200 mA, SOT-23-5; no CE pin or auto-discharge; 170 mV dropout @ 200 mA. | Lower current capacity limits use to sub-200 mA logic rails; unsuitable for 1 A loads or fast shutdown discharge. | Select only for space-constrained, low-current auxiliary rails where auto-discharge is unnecessary. |
| MCP1826-1202E/DB | 1.2 V, 1 A, SOT-223; CE pin present but no auto-discharge; 350 mV dropout @ 1 A; higher quiescent current (85 µA). | Lacks rapid VOUT discharge capability; larger SOT-223 footprint increases board area vs. HSON-6. | Prefer when thermal mass of SOT-223 is acceptable and auto-discharge is not required for system sequencing. |
Compared with TPS7A0512PDBVR and MCP1826-1202E/DB, the NCP694DSAN12T1G uniquely combines 1 A output, HSON-6 compactness, active auto-discharge, and ultra-low standby current - making it the only option meeting all four requirements simultaneously for next-gen portable and industrial edge devices.
Availability
NCP694DSAN12T1G is available at Aetrix Electronics and suitable for wearable health monitors, industrial sensor nodes, portable medical imaging, and automotive cabin sensors requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for NCP694DSAN12T1G 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, sensing, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The NCP694DSAN12T1G belongs to the NCP694 series of super-low-dropout LDOs designed specifically for high-current, battery-powered portable electronics where minimal voltage headroom, fast shutdown discharge, and ultra-low quiescent current are mandatory.
FAQ
What is the minimum input voltage required for NCP694DSAN12T1G to maintain regulation at 1 A load?
The NCP694DSAN12T1G requires a minimum input voltage of 1.76 V to sustain 1.2 V output regulation at 1 A load, based on its typical dropout voltage of 0.56 V. This allows operation down to the end-of-discharge voltage of many primary lithium and LiFePO4 cells. Input below 1.4 V is outside absolute maximum ratings and will disable regulation.
Does NCP694DSAN12T1G require an external resistor divider for output voltage setting?
No, the NCP694DSAN12T1G is a fixed-output variant with internally trimmed 1.2 V regulation; no external resistors are needed. The ADJ/NC pin (Pin 3) is not connected internally and must remain unconnected or grounded - it is not used for feedback in this part number.
How does the auto-discharge function operate in NCP694DSAN12T1G during shutdown?
When the CE pin is pulled low, the NCP694DSAN12T1G disables regulation and activates an internal NMOS transistor between VOUT and GND, discharging the output capacitor rapidly. This prevents residual voltage from interfering with downstream power sequencing or causing latch-up in connected logic.
Can NCP694DSAN12T1G be used with ceramic output capacitors?
Yes, the NCP694DSAN12T1G is stable with 4.7 µF ceramic output capacitors (X5R/X7R), as confirmed in the datasheet's Applications Information section. Ceramic caps are preferred for low ESR and improved transient response; avoid high-ESR tantalum types unless carefully characterized.
What is the thermal resistance (RJA) of NCP694DSAN12T1G in its HSON-6 package?
The NCP694DSAN12T1G has a junction-to-ambient thermal resistance of 111 °C/W when mounted on an 80 mm² copper area (1 oz thickness) per JEDEC 51-7 standards. Actual RJA depends on PCB copper area, layer count, and airflow - doubling copper area typically reduces RJA by ~15–20 °C/W.
NCP694DSAN12T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 6-VQFN 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):
- 1.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.56V @ 1A (Typ)
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 100 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-HSON (2.9x3)
NCP694DSAN12T1G FAQ
1.How can I place an order for NCP694DSAN12T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP694DSAN12T1G 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 NCP694DSAN12T1G reliable?
The price and inventory of NCP694DSAN12T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP694DSAN12T1G is usually 5 days.
3.What payment methods are accepted for NCP694DSAN12T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP694DSAN12T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP694DSAN12T1G?
NCP694DSAN12T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP694DSAN12T1G 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 NCP694DSAN12T1G?
For technical support, including NCP694DSAN12T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP694DSAN12T1G requirements.
6.How does Aetrix verify that NCP694DSAN12T1G is sourced from the original manufacturer or authorized distributors?
All NCP694DSAN12T1G 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 NCP694DSAN12T1G meets industry standards.
7.What is the process for return or replacement of NCP694DSAN12T1G?
All NCP694DSAN12T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP694DSAN12T1G, 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 NCP694DSAN12T1G part is unused and in its original packaging.
Return procedure for NCP694DSAN12T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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