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onsemi NCP694H25HT1G
- Part No.:
- NCP694H25HT1G
- Manufacturer:
- onsemi
- Package:
- SOT-89-5/6
- Datasheet:
-
NCP694H25HT1G.pdf
- Description:
- IC REG LINEAR 2.5V 1A SOT89-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,705
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Product details
Overview
NCP694H25HT1G from onsemi is a fixed-output 2.5 V, 1 A CMOS low-dropout linear voltage regulator in SOT-89-5 package, featuring −3 mV load regulation at 1 A, 0.10 V typical dropout at 300 mA, and ultra-low 100 µA supply current - designed for portable battery-powered instrumentation requiring stable low-voltage bias.
For engineers reviewing the NCP694H25HT1G datasheet, pinout, applications, or equivalent options, key selection criteria include output accuracy (±30 mV at 2.5 V), thermal shutdown (150°C), enable-controlled standby mode (1 µA max), and compatibility with 4.7 µF ceramic output capacitors in space-constrained handheld systems.
Technical Context
The NCP694H25HT1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and thermal/overcurrent protection circuitry. Its architecture enables super-low dropout operation by eliminating PNP-based saturation losses and supporting input voltages as low as 1.4 V while maintaining regulation at 2.5 V output.
It implements an active-enable logic interface (CE pin) with 1.0 V turn-on threshold and 0.4 V turn-off threshold, and includes internal current limiting (250 mA short-circuit limit) and thermal hysteresis (30°C) to ensure safe operation under transient overload or elevated ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V ±30 mV (guaranteed over temperature and load) |
| Max Output Current | 1 A continuous (with proper PCB thermal relief) |
| Dropout Voltage | 0.10 V typical at 300 mA; 0.32 V at 1 A (enables operation from 2.8 V input at full load) |
| Load Regulation | −3 mV from 1 mA to 1 A (minimizes output shift during dynamic load changes) |
| Supply Current | 100 µA typical (Vin−Vout = 1 V); enables >1000-hour battery life in always-on sensor nodes) |
| PSRR | 70 dB at 1 kHz (suppresses switching noise from upstream DC/DC converters) |
| Thermal Shutdown | 150°C activation with 30°C hysteresis (prevents latch-up during sustained overload) |
Pinout & Package
SOT-89-5 package (Case 528AB), 4.5 mm × 2.5 mm × 1.5 mm body, with exposed thermal pad (not electrically connected), rated for 900 mW power dissipation on 100 mm² 1 oz copper PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ADJ/NC) | Adjust / No Connection | No connection for fixed-output NCP694H25HT1G; leave floating or tie to GND per layout best practice |
| 2 (GND) | Power Ground | Main return path for load current and internal bias; requires low-impedance PCB pour |
| 3 (CE) | Enable Control Input | Active-high logic input; pulls device into <1 µA standby when driven <0.4 V |
| 4 (Vin) | Input Supply | Accepts 1.4–6.0 V; requires local 4.7 µF decoupling within 3 mm of pin |
| 5 (Vout) | Regulated Output | Delivers 2.5 V ±30 mV; connects directly to load and 4.7 µF output capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Dropout | 0.10 V at 300 mA enables use with single-cell Li-ion (3.0 V min) or two-cell alkaline (3.2 V min) inputs |
| Standby Mode | 1 µA max quiescent current extends battery life in sleep-state portable instruments |
| Integrated Protection | Current limit (250 mA) + thermal shutdown (150°C/30°C hysteresis) eliminate need for external fault management |
| Pb-Free Packaging | SOT-89-5 RoHS-compliant package with "G" marking; qualified for lead-free reflow (JEDEC J-STD-020) |
| High PSRR | 70 dB @ 1 kHz ensures clean 2.5 V rail for ADCs, RF ICs, and precision analog circuits |
Applications
| Battery-Powered Instruments | Hand-Held Test Equipment |
|---|---|
Use Scenario: Portable multimeter powered by two AA alkaline cells (3.2 V fresh, ~2.4 V end-of-life). IC Role / Device Role / Timing Role: Primary 2.5 V bias regulator for microcontroller, display driver, and 12-bit ADC subsystem. Use Value: Maintains regulation down to 2.8 V input (0.3 V dropout margin), enabling full functionality across >95% of battery discharge curve. | Use Scenario: Pocket-sized oscilloscope with real-time sampling and LCD interface. IC Role / Device Role / Timing Role: Low-noise 2.5 V supply for analog front-end amplifiers and reference buffers. Use Value: 70 dB PSRR suppresses ripple from internal 3.3 V buck converter, reducing ADC quantization noise by ≥8 LSB. |
| Camcorders & Digital Cameras | Portable Communication Devices |
Use Scenario: Image sensor biasing in compact camcorder with auto-focus and image stabilization. IC Role / Device Role / Timing Role: Dedicated 2.5 V LDO for CMOS image sensor analog core and PLL clock generation. Use Value: −3 mV load regulation prevents gain drift during rapid focus motor current transients (up to 800 mA peak). | Use Scenario: Bluetooth headset with voice codec, RF transceiver, and touch interface. IC Role / Device Role / Timing Role: Stable 2.5 V rail for audio DAC, microphone preamp, and digital baseband logic. Use Value: 30 µVrms output noise ensures >95 dB SNR in audio path without additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 2.5 V fixed, 250 mA max output, 600 mV dropout at 250 mA, 2 µA quiescent current | Limited to low-current sensor interfaces; insufficient for 1 A loads | Select only for ultra-low-IQ sub-100 mA applications where dropout >0.6 V is acceptable |
| TLS850B2TE/V33 | 2.5 V fixed, 500 mA max, integrated watchdog and reset, automotive AEC-Q100 Grade 1 | Designed for automotive infotainment; higher cost and qualification overhead | Choose only if functional safety (ASIL-B) or extended temperature (−40°C to +125°C) are required |
Compared with MCP1703T-2502E/MB and TLS850B2TE/V33, the NCP694H25HT1G uniquely delivers 1 A output with 0.10 V dropout and 100 µA IQ in a low-cost industrial-grade SOT-89-5 package - making it optimal for high-current portable instrumentation where efficiency, size, and cost are jointly constrained.
Availability
NCP694H25HT1G is available at Aetrix Electronics and suitable for battery-powered instruments, hand-held test equipment, camcorders and cameras, and portable communication devices requiring stable component supply with no minimum order quantity.
Supply support for NCP694H25HT1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP694 series belongs to onsemi's high-performance LDO portfolio, engineered specifically for portable battery-powered systems demanding ultra-low dropout, tight output accuracy, and robust thermal protection in minimal footprint packages.
FAQ
What is the maximum input voltage rating for the NCP694H25HT1G?
The NCP694H25HT1G has an absolute maximum input voltage rating of 6.5 V. However, the recommended operating range is 1.4 V to 6.0 V. Exceeding 6.0 V may trigger internal protection or reduce reliability; operation above 6.5 V risks permanent damage per the Absolute Maximum Ratings table in the datasheet.
Does the NCP694H25HT1G require an external capacitor on the ADJ pin?
No - the NCP694H25HT1G is a fixed-output variant (2.5 V), and Pin 1 is labeled ADJ/NC (Adjust/No Connection). This pin is not used and must be left unconnected or tied to GND per layout guidelines; no external resistor divider or capacitor is needed or supported.
What is the thermal resistance (RJA) of the NCP694H25HT1G in its SOT-89-5 package?
The junction-to-ambient thermal resistance (RJA) for the NCP694H25HT1G in SOT-89-5 is 111°C/W under standard test conditions: 1 oz copper, 100 mm² board area, per JEDEC 51-1. Actual RJA will improve with larger copper pours or thermal vias beneath the exposed pad.
Can the NCP694H25HT1G be used with ceramic output capacitors?
Yes - the NCP694H25HT1G is explicitly characterized and stabilized for use with 4.7 µF ceramic output capacitors (X5R/X7R). The datasheet confirms stability with low-ESR ceramics and warns against high-ESR tantalum caps that may cause oscillation, confirming ceramic compatibility as a design feature of the NCP694H25HT1G.
What is the enable (CE) pin behavior during power-up for the NCP694H25HT1G?
The CE pin of the NCP694H25HT1G is active-high with a 1.0 V typical turn-on threshold. During power-up, the device remains disabled until CE rises above ~1.0 V; if CE is tied to Vin (standard configuration), the regulator enables only after Vin reaches sufficient level - preventing brown-out output glitches. This behavior is confirmed in Figure 31 and the Electrical Characteristics table.
NCP694H25HT1G 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.32V @ 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
NCP694H25HT1G FAQ
1.How can I place an order for NCP694H25HT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP694H25HT1G 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 NCP694H25HT1G reliable?
The price and inventory of NCP694H25HT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP694H25HT1G is usually 5 days.
3.What payment methods are accepted for NCP694H25HT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP694H25HT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP694H25HT1G?
NCP694H25HT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP694H25HT1G 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 NCP694H25HT1G?
For technical support, including NCP694H25HT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP694H25HT1G requirements.
6.How does Aetrix verify that NCP694H25HT1G is sourced from the original manufacturer or authorized distributors?
All NCP694H25HT1G 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 NCP694H25HT1G meets industry standards.
7.What is the process for return or replacement of NCP694H25HT1G?
All NCP694H25HT1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP694H25HT1G, 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 NCP694H25HT1G part is unused and in its original packaging.
Return procedure for NCP694H25HT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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