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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Management - Specialized

Microchip Technology MCP16501TB-E/RMB

Name: MCP16501TB-E/RMB
Brand: Microchip Technology
SKU: MCP16501TB-E/RMB
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP16501TB-E/RMB

Manufacturer:: Microchip Technology

Category:: Power Management - Specialized

Package:: 24-VFQFN Exposed Pad

Datasheet:: MCP16501TB-E/RMB.pdf

Description:: PMIC FOR SAMA5DX/SAM9X6 MPUS

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Product details

Overview

MCP16501TB-E/RMB from Microchip Technology is a triple-buck + LDO power management IC designed for SAMA5DX/SAM9X6/SAMA7G-series embedded MPUs. It delivers three 1A synchronous buck regulators (2 MHz, 100% duty cycle), one 300 mA LDO, ±1% DDR (Buck2) and core (Buck3) voltage accuracy, and MPU-specific sequencing with nRSTO assertion delay - enabling compact, automotive-grade power solutions for LPDDR2 memory and high-performance eMPU applications.

For engineers reviewing the MCP16501TB-E/RMB datasheet, MCP16501TB-E/RMB pinout, MCP16501TB-E/RMB application, or MCP16501TB-E/RMB equivalent, key selection criteria include its AEC-Q100 qualification, pin-selectable Buck2/Buck3 output voltages (1.2V/1.35V/1.8V and 1.0V/1.15V/1.25V), 250 µA low-power mode quiescent current, 6 µA shutdown current, and integrated hibernate-mode support for MPU backup operation.

Technical Context

The MCP16501TB-E/RMB implements peak-current-mode control across all three buck channels with internal slope compensation optimized for 1.5–2.2 µH inductors and 22 µF minimum output capacitance. Its dedicated LDO features 0.9–3.7 V programmable output via external resistor divider on LFB and supports 300 mA load with ≤500 mV dropout at full current.

MPU interface logic includes open-drain nRSTO and nSTRTO outputs, dual-level power-state control via PWRHLD/LPM inputs, and three-state SELV2/SELV3 pins for precise, resistor-free voltage selection of Buck2 and Buck3 - eliminating feedback resistor tolerance errors while enabling seamless migration across memory generations.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	2.7V to 5.5V - supports single-supply operation from Li-ion, USB, or industrial 3.3V/5V rails without pre-regulation.
Buck Output Current	3 × 1A - each channel independently powers I/O, DDR, and core domains of SAMA5D2/SAM9X6 eMPUs.
Switching Frequency	2 MHz (±10%) - enables use of small 1.5–2.2 µH inductors and reduces EMI filtering requirements.
Output Voltage Accuracy	±1% for Buck2 (DDR) and Buck3 (core) - ensures stable memory interface timing and reliable CPU operation under load and temperature variation.
LDO Output Current	300 mA - sufficient to power analog peripherals (e.g., audio PLL, ADC reference) with low-noise regulation.
Quiescent Current	250 µA (all bucks + LDO active, no load, low-power mode) - extends battery life in always-on backup domains.
Shutdown Current	6 µA max (VIN = 4.5V, TJ = +105°C) - meets stringent automotive and industrial standby power budgets.
Operating Temperature	−40°C to +125°C junction - qualified per AEC-Q100 Grade 1 for under-hood and industrial control applications.

Pinout & Package

24-pin 4 mm × 4 mm VQFN package with exposed thermal pad (EP), optimized for thermal dissipation in space-constrained MPU power designs.

Pin/Terminal	Circuit Role	Design Meaning
OUT1, OUT2, OUT3	Buck output voltage sense	Direct connection to regulation point (e.g., MPU VDDIO, VDDIODDR, VDDCORE) for accurate closed-loop feedback.
SW1, SW2, SW3	Buck switch node	Connects internal high-side/low-side MOSFETs to external inductors; requires tight layout to minimize switching loop area.
PGND1, PGND2, PGND3	Power ground per buck channel	Separate ground returns isolate high-frequency switching noise between domains and reduce crosstalk.
SELV2, SELV3	Three-state voltage select input	Configures Buck2 (DDR) and Buck3 (core) output voltages without external resistors - eliminates trimming error and BOM count.
nRSTO, nSTRTO	Open-drain status outputs	Drive external pull-ups to signal MPU reset readiness (nRSTO) and start-event propagation (nSTRTO) with leakage-free interfacing.
PWRHLD, LPM	MPU-controlled power state inputs	Define active/low-power/hibernate modes; LPM = 1 + PWRHLD = 0 enables DDR self-refresh with minimal current draw.
LEN	LDO enable input	LV logic-compatible (VIH ≥ 1.15 V) control for independent LDO activation - supports dynamic analog subsystem power gating.
VIN, LOUT, LFB	LDO supply, output, and feedback	VIN powers internal analog circuitry; LOUT delivers regulated output; LFB accepts external divider for 0.9–3.7 V programmability.

Key Features

Feature	Design Value
MPU-optimized sequencing	Hardwired default startup order and nRSTO assertion delay eliminate need for external firmware or sequencer ICs in SAMA5D2 designs.
Pin-selectable DDR/core voltages	SELV2/SELV3 three-state inputs provide exact 1.2V/1.35V/1.8V (Buck2) and 1.0V/1.15V/1.25V (Buck3) outputs - no resistor tolerance drift or layout sensitivity.
Leakage-free MPU interface	ESD-hardened I/Os (2 kV HBM) prevent back-powering or leakage into MPU pins during VIN removal - critical for safe hot-swap and battery-backed operation.
Hibernate-mode efficiency	110–190 µA non-switching quiescent current (IQNS_HIB1/IQNS_HIB2) sustains DDR self-refresh with minimal impact on backup supply runtime.
Safe start-up into pre-biased outputs	Active discharge resistors (25 Ω) on all outputs prevent reverse current flow during power-up - protects downstream circuits and ensures monotonic ramp.
Automotive reliability	AEC-Q100 Grade 1 qualification and 150°C max junction temperature rating enable deployment in demanding automotive infotainment and ADAS subsystems.

Applications

SAMA5D2 eMPU Power System	LPDDR2 Memory Interface Supply
Use Scenario: Powering Microchip SAMA5D2 embedded MPU in industrial HMIs and edge gateways requiring DDR memory, USB, and Ethernet connectivity. IC Role / Device Role / Timing Role: Primary PMIC delivering regulated 3.3V I/O, 1.2V DDR, and 1.25V core rails with synchronized sequencing and MPU-controlled hibernate entry. Use Value: Reduces BOM count by integrating three bucks + LDO + sequencing logic - eliminates discrete regulators and external timing components.	Use Scenario: Providing tightly regulated, low-noise 1.2V supply to LPDDR2 memory in automotive telematics units operating across −40°C to +125°C. IC Role / Device Role / Timing Role: Dedicated DDR voltage rail generator with ±1% accuracy, fast transient response, and hibernate-mode retention for self-refresh. Use Value: Ensures DDR timing margin compliance under temperature and load variation - prevents data corruption during thermal cycling.
eMPU Core Voltage Regulation	Backup-Supply Analog Subsystem
Use Scenario: Delivering stable 1.25V core voltage to SAMA7G-series MPUs in ruggedized IoT controllers with extended temperature requirements. IC Role / Device Role / Timing Role: Precision core regulator using SELV3-based voltage selection and active discharge for safe power-down transitions. Use Value: Maintains ±1% output accuracy over full temperature range - guarantees CPU frequency stability and avoids brown-out resets.	Use Scenario: Powering real-time clock, sensor interface, and wake-up logic from supercapacitor or coin-cell backup during main supply loss. IC Role / Device Role / Timing Role: LDO (LOUT) + hibernate-mode bucks supply ultra-low-quiescent subsystems with 110 µA non-switching IQ. Use Value: Extends backup runtime beyond 72 hours at 100 µA load - enables long-duration event logging and secure wake-up capability.

SAMA5D2 eMPU Power System

LPDDR2 Memory Interface Supply

Use Scenario: Powering Microchip SAMA5D2 embedded MPU in industrial HMIs and edge gateways requiring DDR memory, USB, and Ethernet connectivity.

IC Role / Device Role / Timing Role: Primary PMIC delivering regulated 3.3V I/O, 1.2V DDR, and 1.25V core rails with synchronized sequencing and MPU-controlled hibernate entry.

Use Value: Reduces BOM count by integrating three bucks + LDO + sequencing logic - eliminates discrete regulators and external timing components.

Use Scenario: Providing tightly regulated, low-noise 1.2V supply to LPDDR2 memory in automotive telematics units operating across −40°C to +125°C.

IC Role / Device Role / Timing Role: Dedicated DDR voltage rail generator with ±1% accuracy, fast transient response, and hibernate-mode retention for self-refresh.

Use Value: Ensures DDR timing margin compliance under temperature and load variation - prevents data corruption during thermal cycling.

eMPU Core Voltage Regulation

Backup-Supply Analog Subsystem

Use Scenario: Delivering stable 1.25V core voltage to SAMA7G-series MPUs in ruggedized IoT controllers with extended temperature requirements.

IC Role / Device Role / Timing Role: Precision core regulator using SELV3-based voltage selection and active discharge for safe power-down transitions.

Use Value: Maintains ±1% output accuracy over full temperature range - guarantees CPU frequency stability and avoids brown-out resets.

Use Scenario: Powering real-time clock, sensor interface, and wake-up logic from supercapacitor or coin-cell backup during main supply loss.

IC Role / Device Role / Timing Role: LDO (LOUT) + hibernate-mode bucks supply ultra-low-quiescent subsystems with 110 µA non-switching IQ.

Use Value: Extends backup runtime beyond 72 hours at 100 µA load - enables long-duration event logging and secure wake-up capability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar multi-rail PMIC applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP16501D-E/RMB	Same pinout and electrical specs; supports LPDDR2 memory interface and automatic wake-up pulse (AWKP) on fault recovery.	Required for designs using LPDDR2; lacks hysteretic control mode (HCM) present in MCP16501E variants.	Select MCP16501D-E/RMB when LPDDR2 compatibility and fault-initiated restart are needed; verify AWKP timing against system watchdog requirements.
TPS65910A3RSLR	10-channel PMIC with integrated RTC and battery charger; higher integration but larger 48-pin QFN package and no AEC-Q100 qualification.	Targets broader application scope including portable Linux devices; not automotive-qualified and lacks MPU-specific sequencing defaults.	Choose TPS65910A3RSLR only if RTC, charging, or additional LDOs are required - otherwise MCP16501TB-E/RMB offers superior size, cost, and automotive fit.

Compared with MCP16501D-E/RMB, the MCP16501TB-E/RMB omits LPDDR2 support but retains identical buck/LDO performance and AEC-Q100 qualification; versus TPS65910A3RSLR, it trades channel count for smaller footprint, lower quiescent current, and guaranteed automotive reliability - making it optimal for space- and safety-critical eMPU systems.

Availability

MCP16501TB-E/RMB is available at Aetrix Electronics and suitable for automotive infotainment, industrial HMIs, and edge gateway designs requiring stable component supply, AEC-Q100 compliance, and long-term MPU power architecture continuity.

Supply support for MCP16501TB-E/RMB 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

Microchip Technology is a leading provider of microcontrollers, analog, and power management ICs, with deep expertise in embedded MPU power architectures and automotive-grade reliability.

The MCP16501 product line was engineered specifically to simplify power design for Microchip's SAMA5DX/SAM9X6/SAMA7G eMPUs - delivering integrated sequencing, precision voltage selection, and hibernate-mode optimization in a thermally efficient 4 mm × 4 mm package.

FAQ

What is the primary application target for the MCP16501TB-E/RMB?

The MCP16501TB-E/RMB is purpose-built for powering Microchip SAMA5DX, SAM9X6, and SAMA7G embedded MPUs. It provides three regulated buck outputs (3.3V I/O, 1.2V DDR, 1.25V core) and a 300 mA LDO in a single AEC-Q100-qualified device - enabling compact, automotive-grade power solutions for industrial HMIs, telematics, and edge gateways where reliability and thermal efficiency are critical.

Does the MCP16501TB-E/RMB support LPDDR2 memory interfaces?

No, the MCP16501TB-E/RMB does not support LPDDR2. That functionality is exclusive to the MCP16501D variant. The TB-E/RMB shares identical buck/LDO performance and pinout but omits LPDDR2-specific timing and signaling features - making it suitable for SAMA5D2/SAM9X6 systems using DDR2/DDR3 or non-LPDDR memory configurations.

How does the MCP16501TB-E/RMB achieve ±1% output voltage accuracy on Buck2 and Buck3?

The MCP16501TB-E/RMB achieves ±1% accuracy on Buck2 (DDR) and Buck3 (core) through factory-trimmed internal reference and precision comparator circuitry - independent of external resistor tolerances. Voltage selection is performed via three-state SELV2/SELV3 inputs, which directly configure internal DACs to set nominal outputs (e.g., 1.2V, 1.25V) without feedback dividers - eliminating resistor-induced errors and temperature drift.

What is the role of the PWRHLD and LPM pins in the MCP16501TB-E/RMB power state control?

PWRHLD and LPM jointly define the MCP16501TB-E/RMB's operational mode: PWRHLD = high maintains active regulation; PWRHLD = low initiates controlled shutdown. LPM = high + PWRHLD = low enables hibernate mode (DDR self-refresh), drawing just 110–190 µA. This dual-signal scheme allows the MPU to orchestrate power transitions - including backup-mode entry - without external sequencers or firmware intervention.

Can the MCP16501TB-E/RMB be used in automotive applications?

Yes, the MCP16501TB-E/RMB passes AEC-Q100 Grade 1 reliability testing and operates across −40°C to +125°C junction temperature. Its leakage-free MPU interface, 6 µA shutdown current, and hibernate-mode quiescent performance make it suitable for automotive infotainment, digital clusters, and ADAS subsystems where functional safety and thermal robustness are required.

MCP16501TB-E/RMB Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Processor

Current - Supply:: 14mA

Voltage - Supply:: 2.7V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-VQFN (4x4)

MCP16501TB-E/RMB FAQ

1.How can I place an order for MCP16501TB-E/RMB through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP16501TB-E/RMB 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 MCP16501TB-E/RMB reliable?

The price and inventory of MCP16501TB-E/RMB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16501TB-E/RMB is usually 5 days.

3.What payment methods are accepted for MCP16501TB-E/RMB?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16501TB-E/RMB transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP16501TB-E/RMB?

MCP16501TB-E/RMB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP16501TB-E/RMB 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 MCP16501TB-E/RMB?

For technical support, including MCP16501TB-E/RMB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16501TB-E/RMB requirements.

6.How does Aetrix verify that MCP16501TB-E/RMB is sourced from the original manufacturer or authorized distributors?

All MCP16501TB-E/RMB 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 MCP16501TB-E/RMB meets industry standards.

7.What is the process for return or replacement of MCP16501TB-E/RMB?

All MCP16501TB-E/RMB units undergo pre-shipment inspection (PSI). If there is an issue with MCP16501TB-E/RMB, 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 MCP16501TB-E/RMB part is unused and in its original packaging.

Return procedure for MCP16501TB-E/RMB:

1.Submit a request within 90 days.

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

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