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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

onsemi NCP134AMX150TCG

Name: NCP134AMX150TCG
Brand: onsemi
SKU: NCP134AMX150TCG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP134AMX150TCG

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 4-XDFN Exposed Pad

Datasheet:: NCP134AMX150TCG.pdf

Description:: IC REG LINEAR 1.5V 500MA 4XDFN

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Product details

Overview

NCP134AMX150TCG from onsemi is a 500 mA very low dropout (VLDO) CMOS voltage regulator with NMOS pass transistor and separate bias rail (VBIAS), delivering 1.5 V fixed output at up to 500 mA with ±1.5% accuracy over −40°C to +85°C and ultra-low 150 mV dropout at full load (1.5 V_OUT, 3.3 V_BIAS, 85°C). It targets noise-sensitive, space-constrained portable power rails such as smartphone core I/O supplies.

For engineers reviewing the NCP134AMX150TCG datasheet, pinout, applications, or equivalent options, key selection criteria include its dual-rail architecture (VIN/VBIAS), active output discharge capability, 1.2 mm × 1.2 mm XDFN4 package, and guaranteed stability with 2.2 µF ceramic output capacitance.

Technical Context

The NCP134AMX150TCG employs an NMOS pass transistor powered by a dedicated VBIAS rail (2.4–5.5 V), decoupling control circuitry from VIN to enable ultra-low dropout and improved PSRR (80 dB @ 1 kHz on VBIAS). Its internal UVLO monitors VBIAS with 1.6 V threshold and 0.2 V hysteresis.

It integrates logic-level EN control with 0.9 V high-threshold and 0.4 V low-threshold, thermal shutdown (160°C trip/140°C release), and current limiting (550–1000 mA). The active output discharge function-present only in "A"-suffix variants like NCP134AMX150TCG-ensures rapid VOUT discharge during disable.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 1.50 V, ±1.5% tolerance over −40°C to +85°C - ensures stable core I/O supply for low-voltage processors.
Max Output Current	500 mA continuous - supports high-current digital I/O domains without external boost.
VIN Dropout Voltage	150 mV max at 500 mA, 1.5 V_OUT, 3.3 V_BIAS, 85°C - enables operation from weak or aging battery sources.
VBIAS Range	2.4 V to 5.5 V - allows use of shared system rails (e.g., 3.3 V or 5 V bias) independent of VIN.
PSRR (VBIAS)	80 dB @ 1 kHz - suppresses noise coupling from noisy bias rails into sensitive analog/digital loads.
Output Capacitor	Stable with ≥2.2 µF ceramic - eliminates need for bulky tantalum or electrolytic capacitors in compact layouts.
Enable Threshold	V_EN(H) = 0.9 V, V_EN(L) = 0.4 V - compatible with 1.2 V/1.8 V GPIOs without level-shifting.
Active Discharge	Integrated pull-down (R_DISCH = 150 Ω) - discharges VOUT rapidly upon shutdown to prevent latch-up or back-powering.

Pinout & Package

XDFN4 package (Case 711BC): 1.2 mm × 1.2 mm × 0.4 mm, wettable flank, Pb-free, RoHS-compliant. Exposed thermal pad (pin 5 GND) enhances thermal performance (R_JA = 170°C/W).

Pin/Terminal	Circuit Role	Design Meaning
1 - OUT	Regulated output voltage node	Delivers 1.5 V to load; connects directly to 2.2 µF ceramic capacitor for stability.
2 - BIAS	Bias supply input for internal control circuitry	Must be ≥2.4 V; monitored by UVLO; enables low-noise regulation independent of VIN.
3 - EN	Logic-level enable input	High (>0.9 V) enables regulator; low (<0.4 V) disables with <1 µA bias current and activates output discharge.
4 - IN	Main input voltage supply	Accepts 0.8–5.5 V; dropout minimized when VBIAS ≥ VOUT + 1.6 V.
5 - GND	Power and signal ground reference	Shared return path; exposed thermal pad must be soldered to PCB copper for thermal management.

Key Features

Feature	Design Value
Dual-rail NMOS architecture	Separates power path (VIN→OUT) from control logic (VBIAS), enabling 150 mV dropout and 80 dB VBIAS PSRR.
Active output discharge	On-chip 150 Ω pull-down activated during EN low, ensuring fast, controlled VOUT decay to prevent back-powering.
Ultra-low bias current	80 µA typical at VBIAS = 2.7 V; drops to 0.5 µA in shutdown - extends battery life in always-on subsystems.
Stable with small ceramics	Guaranteed stability with 2.2 µF effective ceramic output capacitance - reduces board area and cost vs. larger caps.
Thermal and current protection	Auto-recovering thermal shutdown (160°C trip) and current limit (550–1000 mA) prevent damage under fault conditions.

Applications

Smartphone Core I/O Supply	Tablet Memory Interface Rail
Use Scenario: Powering 1.5 V DDR I/O banks in battery-powered tablets where VIN varies from 2.8–4.2 V during discharge. IC Role / Device Role / Timing Role: Post-regulator converting switched-mode 3.3 V or buck-derived rail to precise, low-noise 1.5 V for memory timing compliance. Use Value: 150 mV dropout preserves regulation down to 1.65 V VIN; 40 µV_RMS output noise prevents timing jitter in high-speed data interfaces.	Use Scenario: Delivering clean 1.5 V to LPDDR4 I/O circuits in slim-profile smartphones with strict EMI and thermal limits. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO supplying memory interface with active discharge to meet JEDEC t_DIS requirements. Use Value: Active discharge (150 Ω) achieves <10 µs VOUT decay; 80 dB VBIAS PSRR rejects noise from shared PMIC bias rail.
Camera Sensor Digital Core	DVR Image Signal Processor (ISP) I/O
Use Scenario: Powering 1.5 V digital logic in high-resolution mobile camera modules where PCB space is limited to <1.5 mm². IC Role / Device Role / Timing Role: Space-optimized voltage regulator providing stable I/O supply with monotonic startup to avoid sensor initialization faults. Use Value: 1.2 mm × 1.2 mm XDFN4 footprint fits tight camera flex assemblies; 150 µs turn-on time ensures reliable boot sequencing.	Use Scenario: Regulating 1.5 V for ISP parallel interface I/O in automotive DVRs operating across −40°C to +85°C ambient. IC Role / Device Role / Timing Role: Industrial-grade LDO with ±1.5% output accuracy and thermal shutdown for mission-critical video processing rails. Use Value: Guaranteed accuracy over full temperature range maintains signal integrity; R_JA = 170°C/W supports convection-cooled designs.

Smartphone Core I/O Supply

Tablet Memory Interface Rail

Use Scenario: Powering 1.5 V DDR I/O banks in battery-powered tablets where VIN varies from 2.8–4.2 V during discharge.

IC Role / Device Role / Timing Role: Post-regulator converting switched-mode 3.3 V or buck-derived rail to precise, low-noise 1.5 V for memory timing compliance.

Use Value: 150 mV dropout preserves regulation down to 1.65 V VIN; 40 µV_RMS output noise prevents timing jitter in high-speed data interfaces.

Use Scenario: Delivering clean 1.5 V to LPDDR4 I/O circuits in slim-profile smartphones with strict EMI and thermal limits.

IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO supplying memory interface with active discharge to meet JEDEC t_DIS requirements.

Use Value: Active discharge (150 Ω) achieves <10 µs VOUT decay; 80 dB VBIAS PSRR rejects noise from shared PMIC bias rail.

Camera Sensor Digital Core

DVR Image Signal Processor (ISP) I/O

Use Scenario: Powering 1.5 V digital logic in high-resolution mobile camera modules where PCB space is limited to <1.5 mm².

IC Role / Device Role / Timing Role: Space-optimized voltage regulator providing stable I/O supply with monotonic startup to avoid sensor initialization faults.

Use Value: 1.2 mm × 1.2 mm XDFN4 footprint fits tight camera flex assemblies; 150 µs turn-on time ensures reliable boot sequencing.

Use Scenario: Regulating 1.5 V for ISP parallel interface I/O in automotive DVRs operating across −40°C to +85°C ambient.

IC Role / Device Role / Timing Role: Industrial-grade LDO with ±1.5% output accuracy and thermal shutdown for mission-critical video processing rails.

Use Value: Guaranteed accuracy over full temperature range maintains signal integrity; R_JA = 170°C/W supports convection-cooled designs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar very-low-dropout, dual-rail LDO applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6216D152MR-G	Single-rail (VIN-only), 150 mA max, no VBIAS input, no active discharge	Limited to lower-current, less noise-sensitive rails; cannot replace NCP134AMX150TCG in bias-isolated systems	Select only if bias rail isolation and >300 mA load are unnecessary.
Richtek RT9080AL-15GJ6	Single-rail, 600 mA, 200 mV dropout at 500 mA, no VBIAS, no active discharge	Higher dropout and no bias decoupling reduce efficiency in low-VIN battery apps; lacks discharge for fast power-down	Consider only for cost-sensitive, non-battery applications where 1.5 V accuracy and fast discharge are secondary.

Compared with XC6216D152MR-G and RT9080AL-15GJ6, the NCP134AMX150TCG uniquely delivers dual-rail operation, 500 mA capability with 150 mV dropout, and integrated active discharge - making it irreplaceable in space-constrained, battery-powered systems requiring rail isolation and fast shutdown.

Availability

NCP134AMX150TCG is available at Aetrix Electronics and suitable for smartphone I/O regulation, tablet memory interface power, and camera sensor digital core supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for NCP134AMX150TCG 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 specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The NCP134AMX150TCG belongs to onsemi's NCP134 family of dual-rail VLDO regulators, designed specifically for noise-sensitive, space-constrained portable electronics requiring high accuracy, ultra-low dropout, and active discharge functionality.

FAQ

What is the maximum dropout voltage of the NCP134AMX150TCG at full 500 mA load?

The NCP134AMX150TCG has a maximum VIN dropout voltage of 150 mV at 500 mA output current, 1.5 V nominal output, 3.3 V VBIAS, and +85°C junction temperature. This value is specified in the Electrical Characteristics table under "VIN Dropout Voltage" for the NCP134AMX110TCG device condition, and confirmed applicable to NCP134AMX150TCG per Figure 6 and ordering table correlation. The low dropout enables operation from weak battery sources while maintaining regulation.

Does the NCP134AMX150TCG support active output discharge, and how is it enabled?

Yes, the NCP134AMX150TCG includes integrated active output discharge, a feature present only in "A"-suffix variants. It is automatically activated when the EN pin is driven low (≤0.4 V), pulling VOUT to GND through an internal 150 Ω resistor. This ensures rapid discharge to prevent back-powering of upstream circuits or latch-up during power sequencing - critical for JEDEC-compliant memory interfaces and camera modules.

What input capacitor is required for stable operation of the NCP134AMX150TCG?

The NCP134AMX150TCG requires a minimum 1 µF ceramic input capacitor (CIN) connected directly between the IN pin and GND. Per the Applications Information section, this stabilizes the input rail against PCB inductance, especially when VIN source impedance is non-negligible. A 0.1 µF ceramic capacitor (CBIAS) is also recommended on the BIAS pin for optimal noise rejection and transient response.

Can the NCP134AMX150TCG operate with a VBIAS voltage lower than 2.7 V?

Yes, the NCP134AMX150TCG supports VBIAS as low as 2.4 V, per the Absolute Maximum Ratings and Electrical Characteristics tables. However, the Undervoltage Lockout (UVLO) threshold is 1.6 V with 0.2 V hysteresis, meaning VBIAS must rise above ~1.8 V to exit UVLO. For guaranteed performance including ±1.5% output accuracy and full 500 mA current limit, VBIAS should be ≥ (VOUT + 1.4 V) = 2.9 V or 2.7 V - whichever is greater - as specified in the test conditions.

What is the thermal resistance (R_JA) of the NCP134AMX150TCG in its XDFN4 package?

The NCP134AMX150TCG in the XDFN4 package (Case 711BC) has a junction-to-air thermal resistance (R_JA) of 170°C/W. This value is derived from thermal simulations using a standard 40 mm × 40 mm × 1.6 mm FR4 PCB with 2-ounce copper on top and bottom layers covering 800 mm². Proper soldering of the exposed thermal pad to the PCB ground plane is essential to achieve this rating and maintain safe junction temperatures below 125°C under full load.

NCP134AMX150TCG 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):: 1.5V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.25V @ 500mA

Current - Output:: 500mA

Current - Quiescent (Iq):: -

Current - Supply (Max):: -

PSRR:: 80dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature, Under Voltage Lockout (UVLO)

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 4-XDFN (1.2x1.2)

NCP134AMX150TCG FAQ

1.How can I place an order for NCP134AMX150TCG through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP134AMX150TCG 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 NCP134AMX150TCG reliable?

The price and inventory of NCP134AMX150TCG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP134AMX150TCG is usually 5 days.

3.What payment methods are accepted for NCP134AMX150TCG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP134AMX150TCG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP134AMX150TCG?

NCP134AMX150TCG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP134AMX150TCG 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 NCP134AMX150TCG?

For technical support, including NCP134AMX150TCG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP134AMX150TCG requirements.

6.How does Aetrix verify that NCP134AMX150TCG is sourced from the original manufacturer or authorized distributors?

All NCP134AMX150TCG 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 NCP134AMX150TCG meets industry standards.

7.What is the process for return or replacement of NCP134AMX150TCG?

All NCP134AMX150TCG units undergo pre-shipment inspection (PSI). If there is an issue with NCP134AMX150TCG, 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 NCP134AMX150TCG part is unused and in its original packaging.

Return procedure for NCP134AMX150TCG:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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