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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear + Switching

onsemi NCP1526MUTXG

Name: NCP1526MUTXG
Brand: onsemi
SKU: NCP1526MUTXG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: NCP1526MUTXG

Manufacturer:: onsemi

Category:: Voltage Regulators - Linear + Switching

Package:: 10-UFDFN Exposed Pad

Datasheet:: NCP1526MUTXG.pdf

Description:: IC REG DL BUCK/LNR SYNC 10UDFN

Quantity:: RFQ Add To RFQ list

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Product details

Overview

NCP1526MUTXG from onsemi is a monolithic dual-output power management IC integrating a 3 MHz synchronous step-down DC-DC converter (1.2 V, 400 mA) and an ultra-low-noise LDO regulator (2.8 V, 150 mA), optimized for RF-sensitive modules in portable battery-powered systems. It operates from 2.7–5.2 V input, delivers up to 94% efficiency in buck mode, and features integrated soft-start, cycle-by-cycle current limiting, and thermal shutdown.

For engineers reviewing the NCP1526MUTXG datasheet, pinout, applications, or equivalent options, this device supports critical low-noise power delivery for application processors and RF transceivers in space-constrained mobile designs where simultaneous high-efficiency conversion and clean biasing are required.

Technical Context

The NCP1526MUTXG implements a constant-frequency voltage-mode PWM architecture with internal P-channel and N-channel MOSFETs for synchronous rectification-eliminating external Schottky diodes and enabling high efficiency at 3 MHz switching. Its dual-regulator topology isolates noisy switching paths from sensitive analog/RF loads via separate ground pins (GND1, GND2) and dedicated bypass (BYPASS) and output (V1) nodes.

Control logic includes independent enable inputs (EN1 for buck, EN2 for LDO), fixed 1.2 V and 2.8 V outputs with ±3% accuracy, and protection features including undervoltage lockout (2.5 V threshold), 1000 mA peak inductor current limit, and thermal shutdown at 160°C with 25°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
DC-DC Output	Fixed 1.2 V ±3%, 400 mA max - powers core logic or baseband processor with tight regulation under load steps
LDO Output	Fixed 2.8 V ±3%, 150 mA max, 45 µV_RMS noise - supplies RF front-end or PLL with ultra-clean bias
Switching Frequency	3.0 MHz nominal (2.4–3.6 MHz range) - enables use of sub-2.2 µH inductors and compact ceramic capacitors
Input Voltage Range	2.7–5.2 V for buck (VIN1); 3.0–5.2 V for LDO (VIN2) - compatible with single Li-ion or triple alkaline/NiMH battery stacks
Efficiency	Up to 94% at full load - minimizes thermal dissipation in sealed handheld enclosures
Package	3.0 × 3.0 × 0.55 mm UDFN-10 (Case 506AT) - ultra-low-profile footprint for thin mobile PCBs
PSRR (LDO)	67 dB at 1 kHz, 45 dB at 100 kHz - suppresses switching ripple from shared input rail

Pinout & Package

Package: 3.0 mm × 3.0 mm × 0.55 mm ultra-thin UDFN-10 (Case 506AT), Pb-free, exposed thermal pad (EP) connected to GND1.

Pin/Terminal	Circuit Role	Design Meaning
1 FB	Feedback Input	Connects to DC-DC output divider node; sets 1.2 V output via internal 1.2 V reference
2 EN1	Digital Enable (Buck)	Active-high control for DC-DC section; logic LOW disables buck converter and reduces quiescent current to 0.2 µA
3 EN2	Digital Enable (LDO)	Active-high control for LDO section; logic LOW disables V1 output and cuts LDO quiescent current to 0.2 µA
4 GND2	LDO Power Ground	Dedicated ground return for LDO section; must be star-connected separately from GND1 to prevent noise coupling
5 BYPASS	LDO Reference Bypass	Requires 100 nF capacitor to ground; stabilizes bandgap reference and achieves 45 µV_RMS output noise
6 V1	LDO Output	Delivers regulated 2.8 V; requires 1.0 µF decoupling capacitor for stability and transient response
7 VIN2	LDO Input	Supplies LDO section only; accepts 3.0–5.2 V; decoupled with 4.7 µF capacitor
8 GND1	Buck Power Ground	Dedicated ground return for DC-DC converter and LX switch node; connects to exposed thermal pad
9 LX	Switch Node	Drives external inductor; carries high di/dt switching current; layout requires short, wide trace and local ground plane
10 VIN1	Buck Input	Supplies DC-DC converter and internal circuitry; accepts 2.7–5.2 V; decoupled with 4.7 µF capacitor

Key Features

Feature	Design Value
Synchronous Buck Architecture	Eliminates external Schottky diode, reducing conduction loss and improving efficiency by ~5–10% vs. asynchronous designs
Independent Dual Enables	EN1 and EN2 allow sequenced power-up/down of processor core and RF subsystem without external logic
Ultra-Low-Noise LDO	45 µV_RMS output noise (100 Hz–100 kHz) with 100 nF BYPASS cap - meets stringent RF supply requirements
Integrated Soft-Start	100–300 µs ramp time prevents inrush current and output overshoot during startup or enable transitions
Thermal Protection with Hysteresis	Shuts down at 160°C junction temperature; auto-restarts only after cooling to 135°C - prevents thermal runaway in sealed assemblies

Applications

Cellular Baseband Power	RF Front-End Bias
Use Scenario: Powers application processor core in GSM/WCDMA/LTE smartphones operating from single-cell Li-ion battery. IC Role / Device Role / Timing Role: Provides tightly regulated 1.2 V supply with fast transient response to handle CPU burst loads while maintaining voltage within ±2%. Use Value: Enables reliable operation under dynamic load conditions (1–400 mA steps) with <35 mV output deviation and no need for external compensation.	Use Scenario: Supplies low-noise bias to PA driver, LNA, or mixer in cellular RF transceiver modules. IC Role / Device Role / Timing Role: Delivers ultra-clean 2.8 V at up to 150 mA with 45 µV_RMS noise and 67 dB PSRR at 1 kHz to minimize phase noise and EVM degradation. Use Value: Eliminates need for discrete LDO + ferrite-bead filtering, saving board area and reducing BOM count in RF sections.
Digital Camera Image Sensor	Wireless Modem Core Logic
Use Scenario: Powers CMOS image sensor digital core and analog bias rails in compact digital still cameras. IC Role / Device Role / Timing Role: Simultaneously delivers 1.2 V for digital logic and 2.8 V for analog pixel array, with isolated grounds preventing switching noise coupling into analog domain. Use Value: Achieves >90% efficiency at 200 mA load while maintaining <10 mV_pp ripple on V1 - critical for low-noise image capture.	Use Scenario: Supplies baseband processor and memory interface in DSL/wireless broadband modems. IC Role / Device Role / Timing Role: Regulates 1.2 V core voltage and 2.8 V I/O voltage from shared 3.6 V battery rail, with independent enable control for power-state management. Use Value: Supports deep-sleep modes with <0.5 µA total quiescent current (buck + LDO off), extending battery life in always-on connectivity devices.

Cellular Baseband Power

RF Front-End Bias

Use Scenario: Powers application processor core in GSM/WCDMA/LTE smartphones operating from single-cell Li-ion battery.

IC Role / Device Role / Timing Role: Provides tightly regulated 1.2 V supply with fast transient response to handle CPU burst loads while maintaining voltage within ±2%.

Use Value: Enables reliable operation under dynamic load conditions (1–400 mA steps) with <35 mV output deviation and no need for external compensation.

Use Scenario: Supplies low-noise bias to PA driver, LNA, or mixer in cellular RF transceiver modules.

IC Role / Device Role / Timing Role: Delivers ultra-clean 2.8 V at up to 150 mA with 45 µV_RMS noise and 67 dB PSRR at 1 kHz to minimize phase noise and EVM degradation.

Use Value: Eliminates need for discrete LDO + ferrite-bead filtering, saving board area and reducing BOM count in RF sections.

Digital Camera Image Sensor

Wireless Modem Core Logic

Use Scenario: Powers CMOS image sensor digital core and analog bias rails in compact digital still cameras.

IC Role / Device Role / Timing Role: Simultaneously delivers 1.2 V for digital logic and 2.8 V for analog pixel array, with isolated grounds preventing switching noise coupling into analog domain.

Use Value: Achieves >90% efficiency at 200 mA load while maintaining <10 mV_pp ripple on V1 - critical for low-noise image capture.

Use Scenario: Supplies baseband processor and memory interface in DSL/wireless broadband modems.

IC Role / Device Role / Timing Role: Regulates 1.2 V core voltage and 2.8 V I/O voltage from shared 3.6 V battery rail, with independent enable control for power-state management.

Use Value: Supports deep-sleep modes with <0.5 µA total quiescent current (buck + LDO off), extending battery life in always-on connectivity devices.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-output PMIC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TPS62260DRVR	Single-output 3 MHz buck (1.2 V, 600 mA); no integrated LDO - requires external low-noise regulator for RF bias	Suitable for digital-only loads; cannot replace NCP1526MUTXG's dual-rail capability without added components	Select when only high-efficiency core voltage is needed and RF noise sensitivity is low
RT8059ZSP	Single-output 2.5 MHz buck (adjustable 0.6–5.5 V, 600 mA); includes enable but no LDO or BYPASS pin for noise reduction	Offers output flexibility but lacks dedicated low-noise LDO path - unsuitable for RF module biasing	Choose for general-purpose buck conversion where output adjustability outweighs noise performance needs

Compared with TPS62260DRVR and RT8059ZSP, the NCP1526MUTXG uniquely integrates both a high-frequency buck converter and a specified ultra-low-noise LDO in one package - eliminating inter-stage filtering, reducing component count by ≥3, and guaranteeing co-designed noise isolation between digital and RF power domains.

Availability

NCP1526MUTXG is available at Aetrix Electronics and suitable for cellular phones, digital still cameras, and wireless modems requiring stable component supply across high-volume production cycles and long-term design-in commitments.

Supply support for NCP1526MUTXG 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, and sensor solutions for automotive, industrial, and portable electronics.

The NCP1526MUTXG belongs to onsemi's portable power management product line, designed specifically to address the dual-rail, low-noise, and space-constrained requirements of battery-powered RF and multimedia devices.

FAQ

What is the maximum output current capability of the NCP1526MUTXG's DC-DC converter and LDO sections?

The NCP1526MUTXG's DC-DC converter delivers up to 400 mA at its fixed 1.2 V output, while the integrated LDO provides up to 150 mA at 2.8 V. Both sections include overcurrent protection: the buck stage limits peak inductor current to 1000 mA, and the LDO clamps output current to approximately 300 mA under short-circuit conditions. These ratings are validated across −40°C to +85°C ambient temperature.

Can the NCP1526MUTXG operate from a single Li-ion battery, and what is its minimum input voltage?

Yes, the NCP1526MUTXG is explicitly designed for single Li-ion battery operation. Its DC-DC converter (VIN1) accepts 2.7–5.2 V, and the LDO (VIN2) accepts 3.0–5.2 V. The undervoltage lockout activates below 2.5 V (typical) on VIN1, ensuring reliable startup as the battery discharges from 4.2 V down to ~3.0 V - covering the usable range of a standard Li-ion cell.

How does the NCP1526MUTXG achieve ultra-low noise on its LDO output (V1)?

The NCP1526MUTXG achieves 45 µV_RMS output noise on V1 through three integrated design elements: a dedicated BYPASS pin requiring a 100 nF capacitor to stabilize the internal bandgap reference, separate LDO ground (GND2) to isolate switching noise, and internal PSRR optimization delivering 67 dB rejection at 1 kHz. This noise performance is measured with C_BYPASS = 100 nF and C_OUT = 1.0 µF, per the datasheet test conditions.

What is the purpose of the two separate ground pins (GND1 and GND2) on the NCP1526MUTXG?

GND1 serves as the power ground return for the DC-DC converter and LX switch node, while GND2 is the dedicated ground return for the LDO section. This separation prevents high-di/dt switching currents from coupling noise into the sensitive LDO reference and output paths. The datasheet mandates star-point connection of both grounds to the system ground plane - a critical layout requirement to maintain the specified 45 µV_RMS LDO noise and 67 dB PSRR.

Is the NCP1526MUTXG pin-compatible with other members of the NCP152x family, such as NCP1522 or NCP1527?

No, the NCP1526MUTXG is not pin-compatible with NCP1522 or NCP1527. While all belong to the same functional family, the NCP1526MUTXG uses a unique 10-pin UDFN package (Case 506AT) with specific pin assignments including dual enables (EN1/EN2), separate VIN1/VIN2 inputs, and dedicated BYPASS and GND2 pins. Other variants use different packages (e.g., SOIC-8) and lack the dual-input, dual-ground architecture - making direct substitution impossible without PCB redesign.

NCP1526MUTXG Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: 10-UFDFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Topology:: Step-Down (Buck) Synchronous (1), Linear (LDO) (1)

Number of Outputs:: 2

Frequency - Switching:: 3MHz

Voltage/Current - Output 1:: 1.2V, 400mA

Voltage/Current - Output 2:: 2.8V, 150mA

Voltage/Current - Output 3:: -

w/LED Driver:: No

w/Supervisor:: No

w/Sequencer:: No

Voltage - Supply:: 2.7V ~ 5.2V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 10-UDFN (3x3)

NCP1526MUTXG FAQ

1.How can I place an order for NCP1526MUTXG through Aetrix?

Please submit a Request for Quotation (RFQ) for NCP1526MUTXG 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 NCP1526MUTXG reliable?

The price and inventory of NCP1526MUTXG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP1526MUTXG is usually 5 days.

3.What payment methods are accepted for NCP1526MUTXG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP1526MUTXG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for NCP1526MUTXG?

NCP1526MUTXG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your NCP1526MUTXG 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 NCP1526MUTXG?

For technical support, including NCP1526MUTXG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP1526MUTXG requirements.

6.How does Aetrix verify that NCP1526MUTXG is sourced from the original manufacturer or authorized distributors?

All NCP1526MUTXG 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 NCP1526MUTXG meets industry standards.

7.What is the process for return or replacement of NCP1526MUTXG?

All NCP1526MUTXG units undergo pre-shipment inspection (PSI). If there is an issue with NCP1526MUTXG, 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 NCP1526MUTXG part is unused and in its original packaging.

Return procedure for NCP1526MUTXG:

1.Submit a request within 90 days.

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

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