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onsemi NCP699SN25T1G
- Part No.:
- NCP699SN25T1G
- Manufacturer:
- onsemi
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
NCP699SN25T1G.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 5TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,223
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Product details
Overview
NCP699SN25T1G from onsemi is a fixed-output 2.5 V CMOS low-dropout linear regulator optimized for portable battery-powered systems. It delivers up to 150 mA output current, features 40 µA typical ground current independent of load, 340 mV dropout at 150 mA, ±2.0% output voltage accuracy, and operates across −40 °C to +85 °C ambient temperature - enabling use in compact handheld instrumentation requiring stable low-power biasing.
For engineers reviewing the NCP699SN25T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its TSOP-5 package footprint, enable control compatibility with sub-1 V logic, stability with 1 µF ceramic capacitors, and thermal shutdown protection at ~160 °C - all critical for space-constrained, battery-life-sensitive designs.
Technical Context
The NCP699SN25T1G integrates a PMOS pass transistor, precision voltage reference, error amplifier, and internal current/temperature limit circuits - eliminating external feedback resistors. Its enable input supports active-high logic with 0.95 V turn-on threshold and 0.3 V turn-off threshold, allowing direct interfacing with low-voltage microcontrollers.
Designed for minimal quiescent power, it maintains 40 µA ground current across full load (1–150 mA) and temperature range (−40 °C to +85 °C), while achieving 55 dB ripple rejection at 120 Hz and 100 µVRMS output noise (100 Hz–100 kHz) - making it suitable for noise-sensitive analog rails in mixed-signal portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V ±2.0% - ensures precise biasing for ADC references or low-voltage logic without external resistor network. |
| Max Output Current | 150 mA - sufficient to power microcontroller cores, sensors, or RF front-end ICs in handheld devices. |
| Dropout Voltage | 340 mV at 150 mA - enables regulation from 2.84 V input, supporting single-cell Li-ion or dual-cell alkaline operation. |
| Ground Current | 40 µA typical (−40 °C to +85 °C) - minimizes standby power loss, extending battery life in always-on sensor nodes. |
| Enable Threshold | 0.95 V (turn-on), 0.3 V (turn-off) - compatible with 1.2 V and 1.8 V I/O domains without level-shifting circuitry. |
| Capacitor Stability | Stable with ≥1 µF ceramic or tantalum - eliminates need for high-ESR capacitors, reducing BOM cost and PCB area. |
| Thermal Protection | Internal shutdown at ~160 °C junction - prevents damage during transient overloads or poor PCB thermal design. |
Pinout & Package
The NCP699SN25T1G is housed in a Pb-free TSOP-5 (SOT-23-5, Case 483) surface-mount package measuring 3.00 × 1.50 × 0.95 mm with 0.95 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vin | Positive input supply - accepts 2.1 V to 6.0 V; must be decoupled with ≥1 µF capacitor near pin. |
| 2 | Gnd | Power ground reference - requires low-impedance connection to minimize noise coupling into regulated output. |
| 3 | Enable | Active-high enable control - pull high to Vin to activate regulator; pull ≤0.3 V to disable and reduce ground current to 0.03 µA. |
| 4 | N/C | No internal connection - must remain unconnected; no routing or copper pour required. |
| 5 | Vout | Regulated 2.5 V output - requires ≥1 µF output capacitor; layout must minimize trace inductance for transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent ground current | 40 µA typical across full temperature and load range - extends battery runtime in sleep-mode applications. |
| Sub-1 V logic-compatible enable | 0.95 V turn-on threshold - allows direct interface with modern ultra-low-voltage MCUs without level shifters. |
| Low-noise output regulation | 100 µVRMS (100 Hz–100 kHz) - suitable for powering precision analog circuits like op-amps or ADC references. |
| Robust capacitor compatibility | Stable with 1 µF ceramic or tantalum - avoids costly high-ESR electrolytics and simplifies layout in dense PCBs. |
| Integrated thermal shutdown | Activates at ~160 °C junction - protects device and system during overload or inadequate heatsinking. |
Applications
| Portable Medical Sensors | Wearable Health Monitors |
|---|---|
|
Use Scenario: Powering optical heart-rate sensor ICs and low-power ADCs in disposable patch-style vital sign monitors. IC Role / Device Role / Timing Role: Provides clean, stable 2.5 V bias rail for analog front-end signal conditioning and digitization. Use Value: 40 µA ground current and 100 µVRMS noise ensure >12-bit effective resolution and multi-day battery life on coin cells. |
Use Scenario: Supplying real-time clock (RTC), accelerometer, and BLE SoC in wrist-worn fitness trackers. IC Role / Device Role / Timing Role: Delivers regulated 2.5 V to mixed-signal subsystems while enabling deep-sleep mode via enable pin control. Use Value: Sub-1 V enable compatibility allows synchronized wake-up with host MCU, minimizing system-level standby current. |
| Handheld Test Instruments | Industrial IoT Edge Nodes |
|
Use Scenario: Biasing precision op-amps and reference buffers in pocket-sized multimeters and LCR meters. IC Role / Device Role / Timing Role: Serves as low-noise, low-drift voltage source for measurement signal chains. Use Value: ±2.0% output accuracy and ±100 ppm/°C tempco maintain calibration integrity across operating temperature range. |
Use Scenario: Powering LoRaWAN transceivers and environmental sensors in battery-operated remote monitoring gateways. IC Role / Device Role / Timing Role: Supplies 2.5 V to RF ICs and microcontrollers during burst transmission cycles. Use Value: 340 mV dropout enables efficient use of partially discharged Li-SOCl₂ batteries, extending field deployment to 10+ years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2502E/TT | 250 mA max output, 1.6 µA quiescent current, SOT-23-3 package (no enable) | Lacks enable control and has higher dropout (600 mV @ 250 mA); suited for simpler always-on rails | Select when ultra-low IQ outweighs need for enable and higher current capability is required. |
| Torex XC6206P252MR-G | 150 mA max output, 1 µA IQ, SOT-23-3 (no enable), ±2% accuracy, 350 mV dropout @ 100 mA | No enable pin; lower IQ but reduced transient performance and no thermal shutdown | Choose for lowest possible standby power where enable control and fault protection are not required. |
Compared with MCP1700T-2502E/TT and XC6206P252MR-G, the NCP699SN25T1G uniquely combines enable functionality, thermal protection, and 40 µA ground current in a 5-pin TSOP package - making it optimal for battery-powered systems requiring controlled power sequencing and robust fault handling.
Availability
NCP699SN25T1G is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, and handheld test instruments requiring stable component supply, long-term lifecycle support, and Pb-free compliance.
Supply support for NCP699SN25T1G 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 focused on energy-efficient electronics for automotive, industrial, cloud, and medical applications.
The NCP699SN25T1G belongs to onsemi's NCP699 series of ultra-low-IQ LDOs, designed specifically for battery-powered handheld communication equipment and portable instrumentation where minimal standby power and small footprint are critical.
FAQ
What is the maximum input voltage rating for the NCP699SN25T1G?
The NCP699SN25T1G supports an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. For reliable 2.5 V output regulation, the minimum recommended input is 2.84 V (2.5 V + 340 mV dropout), and typical operating range is 2.8 V to 5.5 V to ensure margin for line regulation and thermal safety.
Does the NCP699SN25T1G require external resistors to set its output voltage?
No, the NCP699SN25T1G does not require external resistors. It is a fixed-output LDO with factory-trimmed 2.5 V regulation achieved via internal resistor networks and a precision voltage reference. This eliminates component count, layout complexity, and potential drift from external resistor tolerances - a key advantage for space-constrained portable designs.
Can the NCP699SN25T1G be used with ceramic capacitors smaller than 1 µF?
No - the NCP699SN25T1G is specified and characterized for stability only with ≥1 µF ceramic or tantalum output capacitance. Using smaller values may cause oscillation or degraded transient response. The datasheet explicitly recommends 1 µF minimum, and TDK part numbers C2012X5R1C105K and C1608X5R1A105K are validated for use with the NCP699SN25T1G.
What happens to ground current when the NCP699SN25T1G is disabled via the Enable pin?
When the Enable pin is pulled low (≤0.3 V), the NCP699SN25T1G enters shutdown mode and reduces ground current to 0.03 µA typical (−40 °C to +85 °C). This ultra-low disable current preserves battery charge during extended idle periods - a critical feature for intermittently active IoT edge nodes and portable diagnostic tools relying on the NCP699SN25T1G.
Is the NCP699SN25T1G still in active production or discontinued?
The NCP699SN25T1G was marked as discontinued in the February 2026 revision (Rev. 9) of the official onsemi datasheet. However, Aetrix Electronics maintains active inventory and supply chain support for this part, including lifecycle coordination and last-time-buy planning - ensuring continuity for legacy designs and production programs dependent on the NCP699SN25T1G.
NCP699SN25T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- 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):
- 0.45V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 90 µA
- Current - Supply (Max):
- -
- PSRR:
- 55dB ~ 50dB (120Hz ~ 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:
- 5-TSOP
NCP699SN25T1G FAQ
1.How can I place an order for NCP699SN25T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP699SN25T1G 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 NCP699SN25T1G reliable?
The price and inventory of NCP699SN25T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP699SN25T1G is usually 5 days.
3.What payment methods are accepted for NCP699SN25T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP699SN25T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP699SN25T1G?
NCP699SN25T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP699SN25T1G 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 NCP699SN25T1G?
For technical support, including NCP699SN25T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP699SN25T1G requirements.
6.How does Aetrix verify that NCP699SN25T1G is sourced from the original manufacturer or authorized distributors?
All NCP699SN25T1G 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 NCP699SN25T1G meets industry standards.
7.What is the process for return or replacement of NCP699SN25T1G?
All NCP699SN25T1G units undergo pre-shipment inspection (PSI). If there is an issue with NCP699SN25T1G, 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 NCP699SN25T1G part is unused and in its original packaging.
Return procedure for NCP699SN25T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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