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onsemi NCP170AMX320TCG
- Part No.:
- NCP170AMX320TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP170AMX320TCG.pdf
- Description:
- IC REG LINEAR 3.2V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:152,861
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Product details
Overview
NCP170AMX320TCG from onsemi is a CMOS low-dropout linear regulator designed for ultra-low-power portable battery applications. It delivers 150 mA output current with 3.2 V fixed output voltage, 170 mV typical dropout at full load, ±1% output accuracy, and ultra-low 500 nA quiescent current-enabling multi-year operation in coin-cell–powered IoT sensors and wearables.
For engineers reviewing the NCP170AMX320TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its XDFN4 1 × 1 mm package, active discharge capability ('A' suffix), 2.2–5.5 V input range, and thermal shutdown with 175°C trip point-critical for space-constrained, thermally sensitive edge-node designs.
Technical Context
The NCP170AMX320TCG integrates a PMOS pass transistor with precision bandgap reference and error amplifier to achieve stable regulation across −40°C to +85°C. Its enable pin (EN) supports active-high logic control with 1.2 V high-threshold and 0.4 V low-threshold, enabling precise power sequencing in multi-rail systems.
Designed for ceramic capacitor stability, it operates with only 1 µF input and output capacitance. The 'A' variant includes an internal active discharge path (100 Ω typical) that rapidly discharges the output when disabled-preventing residual voltage hold-up in always-on sensor nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.2 V ±1% over −40°C to +85°C - ensures reliable biasing of 3.3 V logic without external feedback resistors. |
| Max Output Current | 150 mA - sufficient to power BLE SoCs, low-power microcontrollers, and image sensor interfaces. |
| Dropout Voltage | 170 mV typ. at 150 mA - enables regulation down to 3.37 V input, extending usable battery life in Li-MnO₂ or two-cell alkaline systems. |
| Quiescent Current | 500 nA typ. - reduces standby power loss to <1 µW, critical for >10-year battery life in sealed environmental monitors. |
| Input Voltage Range | 2.2 V to 5.5 V - compatible with single Li-ion, Li-Po, Li-FePO₄, and 2–3 cell alkaline/NiMH sources. |
| Thermal Shutdown | 175°C trip with 25°C hysteresis - protects against sustained overload in enclosed enclosures without requiring external thermal management. |
| PSRR @ 1 kHz | 41 dB at 150 mA - suppresses switching noise from adjacent DC-DC converters feeding mixed-signal sensor front-ends. |
Pinout & Package
XDFN4 package (Case 711AJ), 1.0 mm × 1.0 mm × 0.4 mm, wettable flank, EPAD internally connected to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Power supply input | Accepts 2.2–5.5 V; requires 1 µF ceramic decoupling close to pin for stability. |
| 2 (GND) | Ground reference | Primary return path; connects internally to EPAD for low-impedance thermal and electrical grounding. |
| 3 (EN) | Enable control input | Active-high logic: ≥1.2 V enables regulator; ≤0.4 V disables with active discharge activation. |
| 4 (OUT) | Regulated output | Delivers 3.2 V ±1%; supports 1 µF ceramic output capacitor; features active discharge when EN = low. |
| EPAD | Exposed thermal pad | Internally tied to GND; must be soldered to PCB thermal land for RJA = 250°C/W and thermal shutdown reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 500 nA typical quiescent current enables >10-year operation on CR2032 coin cells in sleep-dominated duty cycles. |
| Active Output Discharge | 100 Ω internal discharge path pulls OUT to GND within milliseconds of EN deactivation-eliminates need for external bleed resistors. |
| Ceramic Capacitor Stability | Stable with ≥1 µF X5R/X7R ceramics on IN and OUT-reduces BOM count and board area vs. tantalum-based LDOs. |
| High PSRR at Low Frequency | 41 dB rejection at 1 kHz improves noise immunity in systems sharing noisy DC-DC rails with analog signal chains. |
| ±1% Output Accuracy | Tight regulation ensures consistent ADC reference, RF transceiver bias, and MCU core voltage across temperature and line/load variation. |
Applications
| Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting via BLE every 5 minutes. IC Role / Device Role / Timing Role: Primary 3.2 V supply for BLE SoC and analog sensor interface. Use Value: 500 nA IQ extends CR2032 life beyond 12 years; active discharge prevents false wake-up from residual output voltage. |
Use Scenario: Wearable ECG patch operating continuously for 7-day clinical monitoring. IC Role / Device Role / Timing Role: Clean 3.2 V rail for low-noise instrumentation amplifier and SAR ADC. Use Value: 41 dB PSRR at 1 kHz suppresses switching noise from companion buck converter; ±1% accuracy maintains diagnostic signal fidelity. |
| Smart Asset Tracker | Industrial Predictive Maintenance Sensor |
Use Scenario: GPS/LoRaWAN tracker powered by 2×AA alkaline, reporting location hourly. IC Role / Device Role / Timing Role: Regulator for GNSS module and ultra-low-power MCU during active acquisition bursts. Use Value: 170 mV dropout allows operation down to 3.37 V input-capturing last 30% of battery capacity before cutoff. |
Use Scenario: Vibration/temperature sensor mounted on motor housing, harvesting energy intermittently. IC Role / Device Role / Timing Role: Stable 3.2 V supply for MEMS accelerometer and flash memory during data logging bursts. Use Value: Thermal shutdown at 175°C prevents latch-up in high-ambient industrial environments; XDFN4 footprint minimizes thermal mass. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-3202E/MB | 3.2 V fixed, 250 mA rating, 1.6 µA IQ (typ), SOT-23-5 package | Higher IQ increases standby power 3,200×; larger SOT-23 footprint occupies 3× board area | Select only if higher output current is required and ultra-low IQ is not critical. |
| Torex XC6206P322MR-G | 3.2 V fixed, 150 mA, 1 µA IQ (typ), SOT-25 package | No active discharge; lacks EN pin; no thermal shutdown; 1 µA IQ still 2× higher than NCP170AMX320TCG | Use only in non-critical, low-temperature, always-on applications where fast discharge and thermal protection are unnecessary. |
Compared with MCP1700T-3202E/MB and XC6206P322MR-G, the NCP170AMX320TCG uniquely combines 500 nA IQ, active discharge, thermal shutdown, and 1.0 × 1.0 mm XDFN4 packaging-making it the only option meeting stringent requirements for long-life, space-constrained, and safety-aware edge sensing.
Availability
NCP170AMX320TCG is available at Aetrix Electronics and suitable for wireless sensor nodes, portable medical monitors, smart asset trackers, and industrial predictive maintenance sensors requiring stable component supply, long-lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for NCP170AMX320TCG 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 is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The NCP170 series targets ultra-low-power portable electronics, with the NCP170AMX320TCG specifically engineered for battery-operated edge devices demanding nanowatt quiescent operation, rapid output discharge, and minimal footprint.
FAQ
What is the output voltage tolerance of the NCP170AMX320TCG over temperature?
The NCP170AMX320TCG maintains ±1% output voltage accuracy across the full operating junction temperature range of −40°C to +85°C. At +25°C, the output is tightly regulated between 3.168 V and 3.232 V; over temperature, it remains within 3.168 V to 3.232 V, ensuring consistent performance for precision analog and digital loads without external trimming.
Does the NCP170AMX320TCG require external capacitors, and what values are recommended?
Yes, the NCP170AMX320TCG requires both input and output ceramic capacitors for stability. The datasheet specifies minimum 1 µF X5R or X7R ceramic capacitors on both IN and OUT pins. These must be placed as close as possible to the device pins, with short, low-inductance traces-no additional ESR or series resistance is needed, unlike older LDO architectures.
How does the active discharge function work in the NCP170AMX320TCG?
When the EN pin is driven low, the NCP170AMX320TCG activates an internal 100 Ω (typical) discharge path between OUT and GND. This rapidly discharges the output capacitor-typically within tens of microseconds-eliminating residual voltage that could cause unintended behavior in downstream circuitry. This feature replaces external bleed resistors and is enabled only in 'A'-suffix variants like the NCP170AMX320TCG.
What is the maximum allowable input voltage for the NCP170AMX320TCG?
The absolute maximum input voltage for the NCP170AMX320TCG is 6.0 V, but the recommended operating input voltage range is 2.2 V to 5.5 V. Exceeding 5.5 V risks violating safe operating area limits, especially under high ambient temperature or heavy load conditions, and may trigger thermal shutdown or reduce long-term reliability.
Is the NCP170AMX320TCG RoHS-compliant and halogen-free?
Yes, the NCP170AMX320TCG is Pb-free, halogen-free/BFR-free, and fully RoHS-compliant per EU Directive 2011/65/EU. The device meets onsemi's green packaging standards and is qualified for use in environmentally regulated consumer, medical, and industrial applications without restriction.
NCP170AMX320TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.2V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 900 nA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP170AMX320TCG FAQ
1.How can I place an order for NCP170AMX320TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP170AMX320TCG 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 NCP170AMX320TCG reliable?
The price and inventory of NCP170AMX320TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP170AMX320TCG is usually 5 days.
3.What payment methods are accepted for NCP170AMX320TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP170AMX320TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP170AMX320TCG?
NCP170AMX320TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP170AMX320TCG 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 NCP170AMX320TCG?
For technical support, including NCP170AMX320TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP170AMX320TCG requirements.
6.How does Aetrix verify that NCP170AMX320TCG is sourced from the original manufacturer or authorized distributors?
All NCP170AMX320TCG 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 NCP170AMX320TCG meets industry standards.
7.What is the process for return or replacement of NCP170AMX320TCG?
All NCP170AMX320TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP170AMX320TCG, 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 NCP170AMX320TCG part is unused and in its original packaging.
Return procedure for NCP170AMX320TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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