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onsemi NCP170AMX190TCG
- Part No.:
- NCP170AMX190TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP170AMX190TCG.pdf
- Description:
- IC REG LINEAR 1.9V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
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Product details
Overview
NCP170AMX190TCG from onsemi is a CMOS low-dropout linear regulator designed for ultra-low-power portable battery applications. It delivers 150 mA output current with 1.9 V fixed output voltage, 335 mV typical dropout at full load, ±1% output accuracy over −40°C to +85°C, and ultra-low 500 nA typical quiescent current-enabling multi-year battery life in always-on sensors and wearables.
For engineers reviewing the NCP170AMX190TCG datasheet, pinout, applications, or equivalent options, this page provides verified package mapping (XDFN4-4), validated enable threshold (1.2 V high, 0.4 V low), confirmed active discharge capability (100 Ω), thermal shutdown behavior (175°C trip), and real-world PSRR/noise performance across load and frequency conditions.
Technical Context
The NCP170AMX190TCG integrates a PMOS pass transistor with precision bandgap reference and error amplifier to achieve stable regulation under dynamic load transients. Its active discharge circuit rapidly discharges the output capacitor when EN is pulled low-critical for power sequencing in multi-rail systems.
Designed for ceramic-capacitor stability (≥1 µF), it operates across 2.2 V–5.5 V input while maintaining <20 mV load regulation (0–150 mA) and 0.05%/V line regulation-making it suitable for Li-ion, coin-cell, and energy-harvesting supply rails where headroom and quiescent power are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.9 V ±1% over −40°C to +85°C - ensures reliable biasing of 1.8 V I/O domains with margin |
| Max Output Current | 150 mA - supports moderate-power microcontrollers, BLE radios, and image sensors |
| Dropout Voltage | 335 mV typ. at 150 mA - enables operation down to 2.235 V input with 1.9 V output |
| Quiescent Current | 0.5 µA typ. - extends shelf life and runtime in battery-backed RTCs and IoT endpoints |
| PSRR @ 1 kHz | 57 dB at 150 mA - suppresses switching noise from adjacent DC-DC converters |
| Output Noise | 100 µVRMS (100 Hz–1 MHz) - meets low-noise analog sensor and ADC reference requirements |
| Enable Threshold | VENH = 1.2 V min., VENL = 0.4 V max. - compatible with 1.8 V GPIO and open-drain logic |
Pinout & Package
Package: XDFN4 (1.0 mm × 1.0 mm, 0.4 mm height, Case 711AJ), moisture sensitivity level 1, RoHS-compliant, Pb-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Input Power Supply | Accepts 2.2–5.5 V; requires ≥1 µF ceramic input capacitor for stability |
| 2 (GND) | Power Ground | Primary ground return; EPAD internally connected to GND for thermal conduction |
| 3 (EN) | Enable Control Input | Active-high logic; draws ≤10 nA; pulls output to 0 V when disabled (A-version only) |
| 4 (OUT) | Regulated Output | Delivers 1.9 V ±1%; requires ≥1 µF ceramic output capacitor with low ESR |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low IQ | 0.5 µA typical - reduces standby power loss by >95% vs. standard LDOs in always-on nodes |
| Active Output Discharge | 100 Ω typical resistance - discharges output to <0.1 V within 1 ms after disable, preventing back-powering |
| Ceramic-Capacitor Stable | Stable with 1 µF X5R/X7R MLCCs - eliminates need for costly tantalum or electrolytic capacitors |
| Thermal Shutdown | 175°C trip with 25°C hysteresis - protects against sustained overload without latch-up |
| Over-Current Protection | 225 mA short-circuit limit - limits fault current while allowing brief inrush during startup |
Applications
| Wearable Health Monitor | BLE Wireless Sensor Node |
|---|---|
Use Scenario: Continuous ECG/PPG sensing powered by CR2032 coin cell with 10-year shelf life requirement. IC Role / Device Role / Timing Role: Primary 1.9 V supply for ultra-low-power MCU and analog front-end. Use Value: 0.5 µA quiescent current enables >8 years of standby; 335 mV dropout allows operation until battery reaches 2.235 V. |
Use Scenario: Battery-powered temperature/humidity node transmitting data every 5 seconds via Bluetooth Low Energy. IC Role / Device Role / Timing Role: Regulator for BLE SoC's 1.8 V I/O and RF sections. Use Value: Active discharge prevents VOUT hold-up from interfering with MCU reset timing during sleep/wake transitions. |
| Industrial IoT Edge Sensor | Smart Camera Module |
Use Scenario: LoRaWAN node deployed in remote locations with primary AA alkaline battery pack. IC Role / Device Role / Timing Role: Clean 1.9 V rail for precision ADC and digital isolator interface. Use Value: 100 µVRMS noise and 57 dB PSRR ensure <1 LSB error in 12-bit ADC conversions despite noisy DC-DC supply. |
Use Scenario: Compact camera module using CIS with 1.8 V analog core and 1.9 V I/O interface. IC Role / Device Role / Timing Role: Dedicated 1.9 V supply for image sensor I/O and timing controller. Use Value: ±1% output accuracy maintains CIS timing margins; 20 mV load regulation prevents frame sync jitter during burst readout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B192MR-G | Same 1.9 V output, 150 mA, 0.6 µA IQ, but no active discharge; SOT-25 package (larger footprint) | Lacks active discharge - unsuitable for strict power sequencing; requires larger PCB area | Choose if active discharge is unnecessary and SOT-25 assembly infrastructure exists |
| Richtek RT9080-19GB | 1.9 V, 200 mA, 0.8 µA IQ, no active discharge, 250 mV dropout at 150 mA; WDFN-6 package | Lower dropout improves efficiency at low VIN, but higher IQ and no discharge limit use in deep-sleep systems | Prefer for higher-current loads where 0.3 µA extra IQ is acceptable and discharge not required |
Compared with XC6219B192MR-G and RT9080-19GB, the NCP170AMX190TCG uniquely combines sub-µA quiescent current, guaranteed active discharge, and XDFN4's 1.0 mm² footprint-making it optimal for space-constrained, multi-state battery devices requiring deterministic power-down behavior.
Availability
NCP170AMX190TCG is available at Aetrix Electronics and suitable for wearable electronics, industrial sensor nodes, and smart camera modules requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for NCP170AMX190TCG 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 is part of onsemi's ultra-low-power analog portfolio, engineered specifically for battery-operated edge devices where nanoscale quiescent current and precise voltage regulation directly impact product lifetime and signal integrity.
FAQ
What is the maximum input voltage rating for the NCP170AMX190TCG?
The NCP170AMX190TCG has an absolute maximum input voltage of 6.0 V. Operation above this level risks permanent damage. The recommended operating range is 2.2 V to 5.5 V, ensuring stable 1.9 V output across all valid conditions. This range accommodates single-cell Li-ion (4.2 V max), two-cell alkaline (3.2 V fresh), and energy-harvesting sources without external clamping.
Does the NCP170AMX190TCG include active output discharge functionality?
Yes, the "A" suffix in NCP170AMX190TCG explicitly denotes the active discharge version. When the EN pin is driven low, an internal 100 Ω switch connects OUT to GND, discharging the output capacitor to <0.1 V within 1 ms. This prevents back-powering of upstream circuitry and ensures clean power-down sequencing in multi-rail systems.
What is the thermal shutdown behavior of the NCP170AMX190TCG?
The NCP170AMX190TCG triggers thermal shutdown at 175°C junction temperature and remains latched off until the die cools by at least 25°C (hysteresis), resuming regulation at ~150°C. This protects against sustained overload or poor PCB thermal design. The XDFN4 package's 250°C/W junction-to-air thermal resistance requires adequate copper pour for continuous 150 mA operation above 60°C ambient.
Can the NCP170AMX190TCG be used with ceramic output capacitors?
Yes-the NCP170AMX190TCG is fully stable with 1.0 µF or greater X5R/X7R ceramic capacitors on the output. No ESR requirements or external compensation are needed. This eliminates bulkier, less reliable tantalum or aluminum electrolytic capacitors and simplifies layout in space-constrained designs like hearables and medical patches.
What is the enable pin logic configuration for the NCP170AMX190TCG?
The EN pin is active-high with VENH ≥ 1.2 V (minimum) and VENL ≤ 0.4 V (maximum). It draws only 10 nA, making it compatible with weak GPIOs or open-drain controllers. Pulling EN below 0.4 V disables regulation and activates active discharge; pulling above 1.2 V enables normal operation with fast turn-on (<10 µs).
NCP170AMX190TCG 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):
- 1.9V
- 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)
NCP170AMX190TCG FAQ
1.How can I place an order for NCP170AMX190TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP170AMX190TCG 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 NCP170AMX190TCG reliable?
The price and inventory of NCP170AMX190TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP170AMX190TCG is usually 5 days.
3.What payment methods are accepted for NCP170AMX190TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP170AMX190TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP170AMX190TCG?
NCP170AMX190TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP170AMX190TCG 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 NCP170AMX190TCG?
For technical support, including NCP170AMX190TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP170AMX190TCG requirements.
6.How does Aetrix verify that NCP170AMX190TCG is sourced from the original manufacturer or authorized distributors?
All NCP170AMX190TCG 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 NCP170AMX190TCG meets industry standards.
7.What is the process for return or replacement of NCP170AMX190TCG?
All NCP170AMX190TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP170AMX190TCG, 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 NCP170AMX190TCG part is unused and in its original packaging.
Return procedure for NCP170AMX190TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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