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onsemi NCP694D08HT1G
- Part No.:
- NCP694D08HT1G
- Manufacturer:
- onsemi
- Package:
- SOT-89-5/6
- Datasheet:
-
NCP694D08HT1G.pdf
- Description:
- IC REG LINEAR 0.8V 1A SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,920
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Product details
Overview
NCP694D08HT1G from onsemi is a 1 A, 0.8 V fixed-output CMOS low-dropout linear regulator in SOT-89-5 package, featuring −3 mV load regulation at 1 A, ultra-low standby current (≤1 µA), and integrated auto-discharge function for rapid output discharge during shutdown - designed for battery-powered portable instruments requiring stable low-voltage rail generation.
For engineers reviewing the NCP694D08HT1G datasheet, pinout, applications, or equivalent options, key selection considerations include dropout voltage at 1 A (0.72 V), thermal shutdown (150°C), enable threshold (0.4 V logic low), RDS(on) of auto-discharge transistor (30 Ω), and compatibility with ceramic output capacitors ≥4.7 µF.
Technical Context
The NCP694D08HT1G implements a PMOS pass transistor architecture enabling ultra-low dropout operation and fast turn-off via dedicated auto-discharge circuitry. Its internal error amplifier compares output voltage against a 1.0 V reference, while thermal shutdown and current limiting protect under fault conditions.
It operates across 1.4 V to 6.0 V input range with output accuracy of ±30 mV (0.77–0.83 V) at 25°C and supports stable regulation down to 0.8 V output with ≤100 ppm/°C temperature coefficient - optimized for high-current, low-headroom applications where rapid enable/disable sequencing and output rail collapse are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 0.8 V ±30 mV at 100 mA, ensuring precise core supply for low-voltage SoCs and FPGAs |
| Max Output Current | 1 A continuous, supporting high-efficiency power delivery to processors and RF modules |
| Dropout Voltage | 0.72 V at 1 A (25°C), enabling operation from single-cell Li-ion (3.0 V min) with 2.28 V headroom |
| Load Regulation | −3 mV from 1 mA to 1 A, minimizing output sag during dynamic load transients |
| Standby Current | ≤1.0 µA at VCE = 0 V, extending battery life in sleep-mode portable devices |
| Auto-Discharge RDS(on) | 30 Ω typical, enabling <1 ms output collapse when CE is pulled low |
| PSRR | 70 dB at 1 kHz, suppressing switching noise from upstream DC-DC converters |
Pinout & Package
Package: SOT-89-5 (Case 528AB), surface-mount, thermally enhanced 5-pin plastic package with exposed pad for improved heat dissipation (RJA = 111 °C/W on 100 mm² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | ADJ/NC | No connection (NC) for fixed-output version - must be left unconnected or tied to GND per layout guidelines |
| 2 | GND | Power ground reference and thermal path - requires low-impedance PCB pour for stability and thermal performance |
| 3 | CE | Active-high enable input with 0.4 V logic-low threshold; asserts auto-discharge when low |
| 4 | Vin | Input supply (1.4–6.0 V); requires local 4.7 µF decoupling capacitor placed adjacent to pin |
| 5 | Vout | Regulated 0.8 V output; supports ceramic or tantalum output capacitors ≥4.7 µF with ESR < 100 mΩ |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 0.72 V at 1 A enables use with minimal input headroom - critical for single-cell Li-ion systems |
| Integrated auto-discharge | 30 Ω NMOS discharge path collapses Vout rapidly upon disable, preventing back-powering of downstream circuitry |
| Sub-µA standby current | ≤1.0 µA shutdown current extends battery runtime in always-on sensor nodes and wearables |
| Thermal & overcurrent protection | 150°C thermal shutdown with 30°C hysteresis and 250 mA short-circuit current limit ensure robust field reliability |
| Pb-free, RoHS-compliant | SOT-89-5 package meets global environmental compliance requirements without derating |
Applications
| Battery-Powered Instrumentation | Portable Communication Equipment |
|---|---|
Use Scenario: Handheld multimeter powered by two AA alkaline cells (1.8–3.2 V range) requiring stable 0.8 V supply for ADC and microcontroller core. IC Role / Device Role / Timing Role: Primary LDO delivering regulated 0.8 V rail with <±30 mV tolerance and <10 µs transient response to load steps. Use Value: Enables accurate 16-bit ADC conversion by maintaining tight output regulation despite battery voltage decay and 100 mA pulsed loads. |
Use Scenario: Bluetooth LE audio transmitter module operating from 3.0 V Li-ion cell with burst transmit current up to 800 mA. IC Role / Device Role / Timing Role: Core voltage regulator for BLE SoC, activated only during active transmission via CE control. Use Value: Auto-discharge ensures Vout collapses within 500 µs after transmission ends, eliminating leakage paths that degrade standby current. |
| Camcorder Image Sensor Power | Wearable Health Monitor |
Use Scenario: High-resolution CMOS image sensor in compact camcorder requiring clean 0.8 V analog supply with <30 µV RMS noise. IC Role / Device Role / Timing Role: Low-noise LDO (30 µVRMS) filtering switching noise from main 3.3 V DC-DC converter. Use Value: PSRR of 70 dB at 1 kHz suppresses ripple-induced fixed-pattern noise in captured video frames. |
Use Scenario: Optical heart-rate monitor using photodiode array and analog front-end, powered by coin-cell battery (2.0–3.0 V). IC Role / Device Role / Timing Role: Ultra-low-quiescent LDO supplying 0.8 V to analog signal chain during 10-ms measurement bursts. Use Value: 60–100 µA operating supply current minimizes average power draw, extending coin-cell life beyond 6 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout voltage regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A0508PDBVR | 0.8 V fixed, 200 mA max, 1.4 µA IQ, no auto-discharge, SOT-23-5 package | Limited to sub-200 mA loads; lacks rapid output discharge - unsuitable for systems requiring strict rail sequencing | Select only if load current ≤200 mA and auto-discharge is not required; smaller footprint but lower current capability |
| MCP1804T-0802I/OT | 0.8 V fixed, 150 mA max, 3 µA IQ, no CE pin, SOT-23-5 package | No enable control or auto-discharge; rated only for 150 mA - cannot support 1 A peak loads | Only viable for ultra-low-power, non-sequenced 0.8 V rails with <150 mA demand; no system-level control capability |
Compared with TPS7A0508PDBVR and MCP1804T-0802I/OT, the NCP694D08HT1G uniquely delivers 1 A output with integrated auto-discharge and sub-µA standby - making it the sole option among these three for high-current, sequenced portable power rails.
Availability
NCP694D08HT1G is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable communication equipment, camcorders and wearable health monitors requiring stable component supply with guaranteed long-term manufacturability.
Supply support for NCP694D08HT1G 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 portable electronics.
The NCP694 series belongs to onsemi's precision low-dropout regulator product line, engineered specifically for high-current, low-voltage battery-powered applications demanding fast enable/disable response and rail collapse control.
FAQ
What is the maximum input voltage rating for the NCP694D08HT1G?
The NCP694D08HT1G has an absolute maximum input voltage rating of 6.5 V. However, its recommended operating input voltage range is 1.4 V to 6.0 V. Exceeding 6.0 V may compromise long-term reliability, and operation below 1.4 V prevents regulation at 0.8 V output due to dropout constraints. The device is rated for continuous operation up to 6.0 V input in all ambient conditions specified.
Does the NCP694D08HT1G require an external resistor network to set the output voltage?
No, the NCP694D08HT1G is a fixed-output variant with factory-trimmed 0.8 V regulation - no external resistors are needed. Pin 1 (ADJ/NC) is not connected internally and must remain unconnected or grounded per layout guidance. Only adjustable versions (e.g., NCP694DADJHT1G) require external R1/R2 feedback networks.
How does the auto-discharge function operate in the NCP694D08HT1G?
When the CE pin is driven low, the NCP694D08HT1G disables regulation and activates an internal 30 Ω NMOS transistor between Vout and GND. This provides a controlled discharge path, collapsing the 0.8 V output to <100 mV within ~500 µs under 4.7 µF load capacitance - preventing back-powering and ensuring clean power-down sequencing in portable systems.
Can the NCP694D08HT1G be used with ceramic output capacitors?
Yes, the NCP694D08HT1G is explicitly qualified for use with ceramic output capacitors ≥4.7 µF. Its internal compensation is stable with low-ESR ceramics (typical ESR < 10 mΩ), unlike some older LDOs that require higher-ESR tantalum capacitors. Using X5R/X7R 0805 or 1206 ceramic capacitors placed adjacent to pins 4 (Vin) and 5 (Vout) ensures optimal transient response and PSRR performance.
What is the thermal shutdown behavior of the NCP694D08HT1G?
The NCP694D08HT1G features thermal shutdown at 150°C junction temperature with 30°C hysteresis. When TJ reaches 150°C, the device shuts down regulation and holds Vout low until TJ cools to ~120°C, at which point it automatically resumes operation. This protects against sustained overload or poor PCB thermal design while allowing recovery without manual reset - critical for unattended portable equipment.
NCP694D08HT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-89-5/6
- 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:
- SOT-89-5
NCP694D08HT1G FAQ
1.How can I place an order for NCP694D08HT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP694D08HT1G 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 NCP694D08HT1G reliable?
The price and inventory of NCP694D08HT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP694D08HT1G is usually 5 days.
3.What payment methods are accepted for NCP694D08HT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP694D08HT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP694D08HT1G?
NCP694D08HT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP694D08HT1G 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 NCP694D08HT1G?
For technical support, including NCP694D08HT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP694D08HT1G requirements.
6.How does Aetrix verify that NCP694D08HT1G is sourced from the original manufacturer or authorized distributors?
All NCP694D08HT1G 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 NCP694D08HT1G meets industry standards.
7.What is the process for return or replacement of NCP694D08HT1G?
All NCP694D08HT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP694D08HT1G, 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 NCP694D08HT1G part is unused and in its original packaging.
Return procedure for NCP694D08HT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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