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onsemi NCP105AMX250TCG
- Part No.:
- NCP105AMX250TCG
- Manufacturer:
- onsemi
- Package:
- 4-XDFN Exposed Pad
- Datasheet:
-
NCP105AMX250TCG.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 4XDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,204
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Product details
Overview
NCP105AMX250TCG from onsemi is a 150 mA low-dropout linear regulator with fixed 2.5 V output, ±1% accuracy at room temperature, 125 mV typical dropout at 150 mA (VIN = 3.8 V), and 70 dB PSRR at 1 kHz - designed for noise-sensitive, space-constrained battery-powered applications such as GPS modules and Bluetooth handsets.
For engineers reviewing the NCP105AMX250TCG datasheet, pinout, applications, or equivalent options, key selection criteria include quiescent current (50 µA typ.), active output discharge (enabled in A/C variants), soft-start slew-rate option (normal speed), thermal shutdown (160°C), and stability with 1 µF ceramic output capacitor.
Technical Context
The NCP105AMX250TCG implements a PMOS pass transistor architecture with dynamic quiescent current adjustment to minimize IQ under light/no-load conditions. Its internal bandgap reference and error amplifier deliver ±1% output voltage accuracy across −40°C to +85°C.
It integrates enable logic with 0.9 V turn-on / 0.4 V shutdown thresholds, thermal shutdown with 20°C hysteresis, current limiting (600 mA typ.), and - specific to A/C variants - an active output discharge transistor (100 Ω typ.) that pulls VOUT to GND during disable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5 V - eliminates external feedback network; supports precision analog rails in portable sensors. |
| Max Output Current | 150 mA - sufficient for RF transceivers, camera modules, and low-power microcontrollers. |
| Dropout Voltage | 125 mV typ. @ 150 mA (VIN = 3.8 V) - enables operation from single-cell Li-ion (3.0–3.6 V) with margin. |
| Quiescent Current | 50 µA typ. @ no load - extends battery life in always-on monitoring circuits. |
| PSRR | 70 dB @ 1 kHz - suppresses switching noise from DC-DC converters feeding the LDO input. |
| Output Noise | 70 µVRMS (10 Hz–100 kHz) - suitable for ADC reference supplies and RF biasing. |
| Enable Threshold | VEN_HI = 0.9 V, VEN_LO = 0.4 V - compatible with 1.8 V/3.3 V GPIO without level-shifting. |
Pinout & Package
The NCP105AMX250TCG is housed in a 1.0 mm × 1.0 mm XDFN4 package (Case 711AJ) with exposed pad for thermal dissipation. The EPAD must be soldered directly to a ground plane for optimal thermal performance (RJA = 208°C/W on 1 oz FR4 with 645 mm² copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 2.5 V; requires ≥1 µF ceramic capacitor to GND for stability. |
| 2 - GND | Power ground | Reference node for regulation and thermal path; connects to EPAD. |
| 3 - EN | Enable control | Logic-level input: >0.9 V enables regulator; <0.4 V disables and activates output discharge. |
| 4 - IN | Input supply | Accepts 1.7–5.5 V; requires local 1 µF ceramic decoupling capacitor. |
| EPAD | Thermal & electrical ground | Must be connected to PCB ground plane; critical for thermal reliability above 50 mA load. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | 100 Ω discharge path to GND when disabled - prevents floating VOUT in multi-rail systems. |
| Soft-Start (Normal Slew Rate) | 190 mV/s VOUT ramp-up - avoids inrush current and supply droop during power-on sequencing. |
| Stable with Small Capacitor | Guaranteed stability with 1 µF X5R/X7R ceramic COUT - reduces BOM count and board area vs. larger electrolytics. |
| High PSRR Architecture | 70 dB @ 1 kHz, >40 dB up to 100 kHz - maintains clean output despite noisy DC-DC input sources. |
| Robust Protection Suite | Thermal shutdown (160°C), current limit (600 mA), and reverse-current blocking - ensures fault resilience in unattended operation. |
Applications
| GPS Module Power Supply | Bluetooth Audio Transceiver Bias |
|---|---|
Use Scenario: Powers GNSS baseband IC and RF front-end in handheld navigation devices with single-cell Li-ion input. IC Role / Device Role / Timing Role: Primary 2.5 V analog rail regulator delivering low-noise, high-PSRR supply for sensitive RF receivers and ADCs. Use Value: 70 µVRMS output noise and 70 dB PSRR prevent degradation of carrier-to-noise ratio (C/N₀) in weak-signal acquisition. | Use Scenario: Supplies 2.5 V bias to Bluetooth 5.0 audio SoC (e.g., CSR8675) in wireless earbuds with tight thermal constraints. IC Role / Device Role / Timing Role: Low-IQ LDO enabling ultra-low standby current (<1 µA system sleep) while supporting fast wake-up via EN pin. Use Value: 50 µA quiescent current and 190 mV/s soft-start reduce average system power by >15% versus standard LDOs in duty-cycled audio streaming. |
| Medical Pulse Oximeter Sensor | Industrial IoT Edge Node MCU Core |
Use Scenario: Provides regulated 2.5 V to photodiode amplifier and analog front-end in wearable SpO₂ monitors. IC Role / Device Role / Timing Role: Precision analog supply with ±1% accuracy and low drift over temperature (±40 mV from −40°C to +85°C). Use Value: Tight output tolerance and 70 µVRMS noise ensure sub-1% measurement error in optical signal processing. | Use Scenario: Powers 32-bit ARM Cortex-M4 core (e.g., STM32L4+) in battery-operated condition-monitoring nodes with LoRaWAN radio. IC Role / Device Role / Timing Role: Main system rail LDO with enable-controlled power gating for MCU sleep/wake cycles. Use Value: Active output discharge clears residual charge on MCU VDD pins during deep-sleep entry, preventing latch-up and ensuring deterministic reset behavior. |
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/MB | 250 mA max output, 1.6 µA IQ, no active discharge, 600 mV dropout @ 250 mA | Better for ultra-low-IQ always-on sensing; unsuitable where fast VOUT discharge is required. | Select when lowest possible standby current dominates; avoid if output discharge or <200 mV dropout is needed. |
| TLC76025DCQ | 200 mA, 35 µA IQ, 120 mV dropout @ 150 mA, no enable pin, fixed 2.5 V | Simpler interface (no EN), but lacks programmable sequencing and discharge control. | Choose for cost-sensitive, non-sequenced designs where enable functionality is unnecessary. |
Compared with MCP1700T-2502E/MB and TLC76025DCQ, the NCP105AMX250TCG uniquely combines 150 mA capability, 125 mV dropout, active output discharge, and 50 µA IQ - making it optimal for sequenced, noise-sensitive, battery-powered systems requiring deterministic power-down behavior.
Availability
NCP105AMX250TCG is available at Aetrix Electronics and suitable for GPS modules, Bluetooth audio transceivers, medical pulse oximeters, and industrial IoT edge nodes requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for NCP105AMX250TCG 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, with leadership in power management, analog, sensor, and connectivity solutions.
The NCP105AMX250TCG belongs to onsemi's high-PSRR, low-IQ LDO family engineered specifically for portable, battery-powered applications demanding ultra-low noise, precise voltage regulation, and robust protection in minimal footprint.
FAQ
What is the output voltage tolerance of the NCP105AMX250TCG over temperature?
The NCP105AMX250TCG delivers ±1% output voltage accuracy at room temperature (25°C). Over the full operating junction temperature range (−40°C to +85°C), the output deviation is ±40 mV for VOUT ≤ 2.0 V - which corresponds to ±1.6% for the 2.5 V variant. This is confirmed in the Electrical Characteristics table under "Output Voltage Accuracy" with test conditions specifying TJ = −40°C to +85°C.
Does the NCP105AMX250TCG support active output discharge, and how does it function?
Yes, the NCP105AMX250TCG supports active output discharge - a feature present in all NCP105A and NCP105C variants per the datasheet. When the EN pin is driven below 0.4 V, the internal discharge transistor turns on, pulling VOUT to GND through a 100 Ω path (typical). This ensures rapid, controlled discharge of output capacitance, preventing floating voltages that could cause downstream latch-up or undefined logic states.
What is the recommended input and output capacitor configuration for the NCP105AMX250TCG?
The NCP105AMX250TCG requires a minimum 1 µF X5R or X7R ceramic capacitor on both IN and OUT pins, placed as close as possible to the device. The output capacitor must have ESR < 1.8 Ω; tantalum capacitors are not recommended due to high and temperature-variable ESR. The device remains stable down to 0.47 µF effective capacitance, accounting for DC bias and temperature derating - especially critical for 0402-size MLCCs.
How does the NCP105AMX250TCG achieve low quiescent current, and what is its value at no load?
The NCP105AMX250TCG employs dynamic quiescent current adjustment, reducing internal bias currents under light/no-load conditions. Its typical quiescent current is 50 µA at IOUT = 0 mA and 25°C, rising to 95 µA maximum across temperature. During shutdown (EN < 0.4 V), consumption drops to 0.01 µA typ., enabling multi-year battery life in maintenance-free sensor nodes powered by the NCP105AMX250TCG.
Is the NCP105AMX250TCG pin-compatible with other NCP105 variants, and what package does it use?
Yes, all NCP105 variants - including NCP105AMX250TCG - share identical pinout and the XDFN4 1.0 mm × 1.0 mm package (Case 711AJ). Pin 1 is OUT, Pin 2 is GND, Pin 3 is EN, Pin 4 is IN, and the exposed pad (EPAD) is internally connected to GND. This uniformity allows drop-in replacement across voltage options (1.05 V to 3.45 V) and slew-rate variants (A/B/C/D) without PCB redesign.
NCP105AMX250TCG 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):
- 2.5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 95 µA
- Current - Supply (Max):
- -
- PSRR:
- 70dB (1kHz)
- Control Features:
- Enable
- Protection Features:
- Current Limit
- Operating Temperature:
- -40°C ~ 85°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-XDFN (1x1)
NCP105AMX250TCG FAQ
1.How can I place an order for NCP105AMX250TCG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP105AMX250TCG 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 NCP105AMX250TCG reliable?
The price and inventory of NCP105AMX250TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP105AMX250TCG is usually 5 days.
3.What payment methods are accepted for NCP105AMX250TCG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP105AMX250TCG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP105AMX250TCG?
NCP105AMX250TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP105AMX250TCG 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 NCP105AMX250TCG?
For technical support, including NCP105AMX250TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP105AMX250TCG requirements.
6.How does Aetrix verify that NCP105AMX250TCG is sourced from the original manufacturer or authorized distributors?
All NCP105AMX250TCG 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 NCP105AMX250TCG meets industry standards.
7.What is the process for return or replacement of NCP105AMX250TCG?
All NCP105AMX250TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP105AMX250TCG, 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 NCP105AMX250TCG part is unused and in its original packaging.
Return procedure for NCP105AMX250TCG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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