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onsemi NCP171AMX170165TCG
- Part No.:
- NCP171AMX170165TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP171AMX170165TCG.pdf
- Description:
- IC REG LINEAR 1.7V 80MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
NCP171AMX170165TCG from onsemi is an ultra-low-quiescent-current dual-mode LDO regulator delivering 80 mA in Active Mode and consuming only 50 nA in Low Power Mode. It features factory-programmed 165 mV output voltage offset in Low Power Mode (vs. 1.7 V nominal Active Mode output), ECO pin-controlled mode switching, and ±2% output accuracy - ideal for battery-powered IoT sensors requiring multi-year operation.
For engineers reviewing the NCP171AMX170165TCG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, XDFN4 package layout, real-world use cases in energy-harvesting nodes and RFID tags, and validated alternative options with documented functional trade-offs.
Technical Context
The NCP171AMX170165TCG implements a dual-path internal architecture: one optimized for low-noise, high-PSRR (65 dB @ 1 kHz) regulation in Active Mode, and a separate ultra-low-IQ path enabling 50 nA quiescent current at no load. Its ECO pin directly controls mode selection - pulled to GND for Low Power Mode (5 mA max output), driven to VOUT for Active Mode (80 mA max).
Output voltage scaling is fixed at 165 mV reduction in Low Power Mode, factory-programmed per ordering code ('165' in suffix). The device includes active output discharge (RDS(on) ≈ 50 Ω), thermal shutdown (165°C), and current limiting (140–170 mA in Active Mode), all operating within 1.7–5.5 V input range and ±2% output accuracy over −40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Quiescent Current (LP) | 50 nA typical at no load - enables >10-year battery life in sleep-state sensor nodes |
| Output Current (Active) | 80 mA maximum - sufficient to power microcontrollers, RF transceivers, or analog front-ends during active duty cycles |
| Output Voltage Offset | 165 mV factory-programmed reduction in Low Power Mode - lowers system power by ~10% at same load vs. fixed-output LDOs |
| Dropout Voltage | 41 mV typical at 80 mA / 3.3 V - supports regulation from 1.7 V input down to 1.7 V output (e.g., single Li-SOCl₂ cell) |
| PSRR @ 1 kHz | 65 dB in Active Mode - suppresses switching noise from DC-DC converters feeding the LDO input |
| Output Accuracy | ±2% over −40°C to +85°C - ensures reliable logic-level compliance for 1.8 V or 3.3 V digital interfaces |
| Enable Threshold | VENA(H) = 1.2 V, VENA(L) = 0.4 V - compatible with standard GPIOs and open-drain controllers |
Pinout & Package
Package: XDFN4 1.2 mm × 1.2 mm, 5-pin (4 signal + 1 exposed pad), Case 711BC, RoHS-compliant, Pb-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ECO | Mode control input | Pull to GND → Low Power Mode (5 mA, 50 nA IQ); drive to VOUT → Active Mode (80 mA, 55–95 µA IQ) |
| 2 - OUT | Regulated output | Delivers stable 1.7 V (Active) or 1.535 V (Low Power) with active discharge to GND when disabled |
| 3 - IN | Input supply | Accepts 1.7–5.5 V; requires 1.0 µF ceramic decoupling capacitor placed adjacent to pin |
| 4 - ENA | Enable input | Voltage ≥ 1.2 V enables regulator; ≤ 0.4 V disables with 30 nA shutdown current and fast output discharge |
| 5 (EP) - GND | Power ground / thermal pad | Exposed pad must be soldered to PCB ground plane for thermal relief (RJA = 170°C/W) and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Dual power mode with ECO pin | Enables dynamic system-level power management: firmware-triggered transition between full-performance and nano-power states |
| Factory-programmed 165 mV offset | Eliminates need for external resistive divider or mode-specific feedback network - reduces BOM count and layout area |
| Active output discharge | Internal 50 Ω NMOS pulls VOUT to GND in <1 ms upon disable - prevents floating outputs and unintended wake-up of downstream circuitry |
| High PSRR (65 dB @ 1 kHz) | Maintains clean 1.7 V rail even when powered from noisy switcher outputs - critical for ADC reference stability and RF transmitter performance |
| Thermal shutdown with 20°C hysteresis | Protects against sustained overload without latch-up; auto-recovery after cooling - suitable for unattended edge devices |
Applications
| Wireless Sensor Node | RFID Reader Module |
|---|---|
Use Scenario: Sub-GHz LoRaWAN node powered by CR2032 coin cell, transmitting temperature data every 5 minutes. IC Role / Device Role / Timing Role: Primary power regulator supplying MCU, radio, and sensor - dynamically switches to Low Power Mode between transmissions. Use Value: 50 nA quiescent current extends battery life beyond 7 years; 165 mV voltage scaling reduces sleep-mode power by 9.7% at 1.7 V nominal. |
Use Scenario: Portable UHF RFID reader using battery + boost converter, requiring clean 1.7 V for analog front-end and digital baseband. IC Role / Device Role / Timing Role: Post-regulator stabilizing boosted rail; ECO pin synchronized with tag interrogation cycle to minimize average power. Use Value: 65 dB PSRR rejects boost converter ripple; active discharge prevents residual charge from interfering with next read cycle timing. |
| Energy-Harvesting Wearable | Industrial Asset Tracker |
Use Scenario: Solar-powered health patch harvesting ~10 µW/cm², storing energy in supercapacitor, powering BLE SoC intermittently. IC Role / Device Role / Timing Role: Ultra-low-IQ LDO enabling startup from sub-2 V storage voltage; ECO controlled by SoC's deep-sleep exit signal. Use Value: 1.7 V minimum input allows regulation from partially discharged supercapacitor; 165 mV offset matches SoC's lower-voltage retention mode. |
Use Scenario: GPS-enabled tracker in cold-chain logistics, operating −40°C to +85°C, reporting location every 2 hours via NB-IoT. IC Role / Device Role / Timing Role: Main system regulator for MCU, GNSS receiver, and cellular modem - maintains 1.7 V rail across wide temperature and load transients. Use Value: ±2% accuracy ensures reliable 1.8 V I/O interface operation; thermal shutdown prevents damage during extended solar charging in hot environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6210B172MR-G | Single-mode LDO; 250 nA IQ, 150 mA output, fixed 1.7 V output, no voltage scaling or ECO control | Lacks dual-mode capability and programmable offset - suitable only for always-on or simple enable-controlled systems | Select when lowest possible BOM cost and footprint are prioritized over dynamic power optimization |
| Richtek RT9080-17PU5 | Ultra-low-IQ LDO (300 nA), 300 mA output, adjustable output via external resistor, no factory-programmed offset | Requires external feedback network; no integrated ECO logic or guaranteed 165 mV scaling - design complexity increases | Choose when higher output current and adjustable voltage are needed, and board space permits external resistors |
Compared with Torex XC6210B172MR-G and Richtek RT9080-17PU5, the NCP171AMX170165TCG uniquely delivers factory-trimmed 165 mV voltage scaling and sub-100 nA quiescent current in a 1.2×1.2 mm package - eliminating external components while enabling precise, firmware-controlled power state transitions.
Availability
NCP171AMX170165TCG is available at Aetrix Electronics and suitable for wireless sensor nodes, RFID reader modules, energy-harvesting wearables, and industrial asset trackers requiring stable component supply with long-term lifecycle assurance.
Supply support for NCP171AMX170165TCG 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 NCP171AMX170165TCG belongs to onsemi's SLIQ (Super Low IQ) LDO family - engineered specifically for battery-constrained edge devices where multi-year operation and dynamic power-state agility are mandatory.
FAQ
What is the exact output voltage configuration of the NCP171AMX170165TCG?
The NCP171AMX170165TCG is factory-programmed for 1.7 V nominal output in Active Mode and 1.535 V (1.7 V − 165 mV) in Low Power Mode. This 165 mV offset is permanently laser-trimmed and cannot be adjusted externally - confirmed in Table 4 of the official datasheet under "Offset (Note 5)" and ordering code '165'.
How does the ECO pin function in the NCP171AMX170165TCG?
The ECO pin on the NCP171AMX170165TCG directly selects operating mode: pulling it to GND forces Low Power Mode (5 mA max output, 50 nA IQ), while driving it to VOUT engages Active Mode (80 mA max, 55–95 µA IQ). No external pull-up/down resistors are required - the internal thresholds are VECOH = 0.5 V and VECOL = 0.2 V.
Does the NCP171AMX170165TCG support active output discharge, and how does it work?
Yes, the NCP171AMX170165TCG includes integrated active output discharge. When the ENA pin is driven below 0.4 V, an internal NMOS transistor (RDS(on) ≈ 50 Ω) connects VOUT to GND, discharging the output capacitor in under 1 ms. This prevents floating voltages that could cause unintended wake-up or latch-up in downstream circuitry.
What is the thermal performance of the NCP171AMX170165TCG in its XDFN4 package?
The NCP171AMX170165TCG in XDFN4 has a junction-to-ambient thermal resistance (RJA) of 170°C/W when mounted on a 40 mm × 40 mm FR4 PCB with 2-ounce copper on top and bottom layers. Its thermal shutdown activates at 165°C with 20°C hysteresis, and proper grounding of the exposed pad is essential to maintain safe junction temperatures under 80 mA load.
Can the NCP171AMX170165TCG be used with input voltages below 1.7 V?
No - the absolute minimum operating input voltage for the NCP171AMX170165TCG is 1.7 V, as specified in Table 4 ("Operating Input Voltage") and Absolute Maximum Ratings. Operation below this threshold is not characterized or guaranteed; attempting to power the device at 1.6 V may result in unstable regulation or failure to start up.
NCP171AMX170165TCG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 4-XDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.7V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 80mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- -
- PSRR:
- 65dB (1kHz)
- 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 (1.2x1.2)
NCP171AMX170165TCG FAQ
1.How can I place an order for NCP171AMX170165TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP171AMX170165TCG 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 NCP171AMX170165TCG reliable?
The price and inventory of NCP171AMX170165TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP171AMX170165TCG is usually 5 days.
3.What payment methods are accepted for NCP171AMX170165TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP171AMX170165TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP171AMX170165TCG?
NCP171AMX170165TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP171AMX170165TCG 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 NCP171AMX170165TCG?
For technical support, including NCP171AMX170165TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP171AMX170165TCG requirements.
6.How does Aetrix verify that NCP171AMX170165TCG is sourced from the original manufacturer or authorized distributors?
All NCP171AMX170165TCG 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 NCP171AMX170165TCG meets industry standards.
7.What is the process for return or replacement of NCP171AMX170165TCG?
All NCP171AMX170165TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP171AMX170165TCG, 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 NCP171AMX170165TCG part is unused and in its original packaging.
Return procedure for NCP171AMX170165TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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