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onsemi NCP694DSAN08T1G
- Part No.:
- NCP694DSAN08T1G
- Manufacturer:
- onsemi
- Package:
- 6-VQFN Exposed Pad
- Datasheet:
-
NCP694DSAN08T1G.pdf
- Description:
- IC REG LINEAR 0.8V 1A 6HSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,195
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Product details
Overview
NCP694DSAN08T1G from onsemi is a 0.8 V fixed-output, 1 A CMOS low-dropout linear voltage regulator in HSON-6 package, featuring ultra-low dropout (0.18 V at 300 mA), −3 mV load regulation at 1 A, and integrated auto-discharge function for rapid output discharge during shutdown. It serves as a precision power supply for core logic rails in portable battery-powered systems requiring stable low-voltage bias.
For engineers reviewing the NCP694DSAN08T1G datasheet, pinout, applications, or equivalent options, key selection considerations include its 0.8 V output capability, HSON-6 thermal performance (RJA = 111 °C/W), enable-controlled standby mode (Istby ≤ 1.0 µA), and auto-discharge functionality unique to the "D" variant.
Technical Context
The NCP694DSAN08T1G uses a PMOS pass transistor architecture enabling ultra-low dropout operation down to 0.05 V at 300 mA for 0.8 V output, with internal reference (1.0 V) and error amplifier ensuring tight output regulation. Its enable input (CE) provides logic-level control with defined turn-on/turn-off thresholds (VTH,CE = 1.0 V / 0.4 V) and supports automatic output discharge via an internal transistor when disabled.
Thermal protection includes junction shutdown at 150 °C with 30 °C hysteresis, and overcurrent limiting at 250 mA. The device operates across −40 °C to +85 °C ambient, supports input voltages from 1.4 V to 6.0 V, and delivers 70 dB PSRR at 1 kHz - critical for noise-sensitive analog and RF subsystems powered from noisy battery or DC-DC sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±30 mV (±3.75%) at 100 mA, enabling direct core supply for low-voltage processors and FPGAs |
| Max Output Current | 1 A continuous - sufficient for SoC core rails and high-speed interface I/O banks |
| Dropout Voltage | 0.18 V typical at 300 mA; 0.56 V at 1 A - allows operation from single-cell Li-ion (2.7–4.2 V) with margin |
| Load Regulation | −3 mV from 1 mA to 1 A - ensures < ±0.4% output deviation under full dynamic load swing |
| Standby Current | ≤ 1.0 µA at VIN = 6.0 V - minimizes battery drain in system sleep states |
| PSRR | 70 dB at 1 kHz - suppresses switching noise from upstream DC-DC converters feeding the LDO |
| Thermal Shutdown | 150 °C activation with 30 °C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking |
Pinout & Package
HSON-6 package (Case 506AE): 2.9 mm × 3.0 mm × 0.9 mm body, exposed thermal pad, Pb-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 | VOUT | Dual parallel output pins reduce IR drop and improve current sharing - essential for 1 A delivery with low PCB trace resistance |
| 3 | ADJ / NC | No connection for fixed-output NCP694DSAN08T1G; not used - must be left floating or grounded per layout best practice |
| 4 | GND | Power ground return; connects directly to exposed thermal pad - requires solid copper pour for thermal and EMI performance |
| 5 | CE | Active-high enable: drives output ON when ≥1.0 V; enables fast system-level power sequencing and auto-discharge when pulled low |
| 6 | VIN | Input supply rail; accepts 1.4–6.0 V - compatible with Li-ion, Li-Po, and regulated intermediate bus voltages |
Key Features
| Feature | Design Value |
|---|---|
| Auto-discharge function | Internal NMOS discharges VOUT rapidly upon CE deactivation - eliminates hold-up time and prevents back-powering of upstream circuits |
| Ultra-low quiescent current | 60–100 µA operating supply current - extends battery runtime in always-on sensor nodes and wearables |
| Low thermal resistance | RJA = 111 °C/W (1 oz Cu, 100 mm²) - enables 1 A operation without external heatsink in compact portable designs |
| High PSRR at 1 kHz | 70 dB rejection of ripple from switching regulators - preserves signal integrity in ADC references and RF synthesizers |
| Stable with ceramic output caps | Supports 4.7 µF X5R/X7R MLCCs - eliminates need for bulky, aging-prone tantalum capacitors and reduces BOM cost |
Applications
| Mobile Baseband Processors | Wearable Sensor Hubs |
|---|---|
Use Scenario: Powering ARM Cortex-A/M series application processors in smartphones and tablets where core voltage must scale dynamically between 0.6 V and 0.9 V. IC Role / Device Role / Timing Role: Primary core LDO delivering tightly regulated 0.8 V to processor VDD_CORE, synchronized with DVFS commands via CE pin. Use Value: Enables sub-1 V operation with < ±0.4% load regulation, minimizing dynamic power loss while supporting fast enable/disable for power-state transitions. |
Use Scenario: Supplying ultra-low-power microcontrollers (e.g., Nordic nRF52, TI CC26xx) and MEMS sensors (accelerometers, gyroscopes) in fitness trackers and hearables. IC Role / Device Role / Timing Role: Always-on LDO providing clean 0.8 V bias to RTC, sensor interface, and BLE radio during deep-sleep modes. Use Value: 1.0 µA standby current and auto-discharge prevent battery leakage and ensure deterministic wake-up timing after long idle periods. |
| Portable Medical Monitors | Industrial Handheld Scanners |
Use Scenario: Powering analog front-end (AFE) ICs and low-noise amplifiers in portable ECG and pulse oximetry devices. IC Role / Device Role / Timing Role: Low-noise LDO supplying 0.8 V reference and bias rails to precision ADCs and op-amps. Use Value: 70 dB PSRR and 30 µVRMS output noise preserve SNR in sub-µV biomedical signal chains, meeting IEC 60601-1 EMC requirements. |
Use Scenario: Regulating power to barcode image sensors and laser drivers in ruggedized warehouse scanners operating from 3.7 V Li-ion packs. IC Role / Device Role / Timing Role: High-current LDO buffering the main 3.3 V rail to deliver stable 0.8 V to CIS image sensor cores. Use Value: 1 A capability with 0.56 V dropout at full load ensures reliable operation even at end-of-battery (3.0 V input), avoiding frame corruption during scanning bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout, fixed-output voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0508PDBVR | 0.8 V fixed, 200 mA max, SOT-23-5; lower current, no auto-discharge, 25 µA IQ | Suitable only for ultra-low-power MCU cores or peripherals - insufficient for 1 A loads | Select if system load ≤200 mA and lowest possible quiescent current is prioritized over discharge control. |
| NCP114SN08T1G | 0.8 V fixed, 300 mA max, SOT-23-5; no CE pin, no auto-discharge, 60 µA IQ | Lacks enable and discharge functions - requires external MOSFET for sequencing and discharge | Choose only for space-constrained, non-sequenced applications where 300 mA suffices and CE functionality is unnecessary. |
Compared with TPS7A0508PDBVR and NCP114SN08T1G, the NCP694DSAN08T1G uniquely delivers 1 A output with integrated auto-discharge and enable control in a thermally efficient HSON-6 package - making it the only viable option for high-current, sequenced, battery-critical portable systems.
Availability
NCP694DSAN08T1G is available at Aetrix Electronics and suitable for mobile baseband processors, wearable sensor hubs, portable medical monitors, industrial handheld scanners, and battery-powered instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for NCP694DSAN08T1G 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, sensor, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The NCP694 series was designed specifically for portable battery-powered equipment demanding high output current, ultra-low dropout, and intelligent power sequencing - targeting next-generation wearables, medical devices, and compact wireless edge nodes.
FAQ
What is the minimum input voltage required for NCP694DSAN08T1G to regulate 0.8 V output at 1 A?
The NCP694DSAN08T1G requires a minimum input voltage of 1.4 V per datasheet specifications. At 1 A load, the dropout voltage is 0.56 V, so Vin must be ≥ 1.36 V to maintain regulation - the 1.4 V rating provides margin for line and load transients. Operation below 1.4 V risks dropout and unregulated output.
Does NCP694DSAN08T1G require an external resistor network to set its output voltage?
No. The NCP694DSAN08T1G is a fixed-output variant with factory-trimmed 0.8 V regulation - no external resistors are needed. Pin 3 (ADJ/NC) is not connected internally and must remain unconnected or grounded; using it for adjustment would violate the device's fixed-output design.
How does the auto-discharge function operate in NCP694DSAN08T1G?
When the CE pin is driven low, the NCP694DSAN08T1G activates an internal NMOS transistor between VOUT and GND, discharging the output capacitor rapidly. This prevents residual voltage from back-powering downstream circuitry and ensures deterministic power-down timing - a feature exclusive to "D" version devices like NCP694DSAN08T1G.
Can NCP694DSAN08T1G be used with ceramic output capacitors?
Yes. The NCP694DSAN08T1G is stable with 4.7 µF ceramic capacitors (X5R/X7R), as confirmed in the datasheet's Applications Information section. Ceramic caps reduce size, cost, and aging drift versus tantalum, and their low ESR improves transient response - no series resistor is required for stability.
What is the thermal performance of NCP694DSAN08T1G in its HSON-6 package?
The NCP694DSAN08T1G has a junction-to-ambient thermal resistance (RJA) of 111 °C/W when mounted on a standard 1 oz copper, 100 mm² PCB. At 1 A load with 0.56 V dropout (0.56 W dissipation), this yields ~62 °C temperature rise above ambient - well within the 150 °C junction limit, provided ambient stays ≤88 °C.
NCP694DSAN08T1G 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):
- 0.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.72V @ 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)
NCP694DSAN08T1G FAQ
1.How can I place an order for NCP694DSAN08T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP694DSAN08T1G 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 NCP694DSAN08T1G reliable?
The price and inventory of NCP694DSAN08T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP694DSAN08T1G is usually 5 days.
3.What payment methods are accepted for NCP694DSAN08T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP694DSAN08T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP694DSAN08T1G?
NCP694DSAN08T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP694DSAN08T1G 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 NCP694DSAN08T1G?
For technical support, including NCP694DSAN08T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP694DSAN08T1G requirements.
6.How does Aetrix verify that NCP694DSAN08T1G is sourced from the original manufacturer or authorized distributors?
All NCP694DSAN08T1G 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 NCP694DSAN08T1G meets industry standards.
7.What is the process for return or replacement of NCP694DSAN08T1G?
All NCP694DSAN08T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP694DSAN08T1G, 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 NCP694DSAN08T1G part is unused and in its original packaging.
Return procedure for NCP694DSAN08T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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