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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Special Purpose Regulators

STMicroelectronics PM6652

Name: PM6652
Brand: STMicroelectronics
SKU: PM6652
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PM6652

Manufacturer:: STMicroelectronics

Category:: Special Purpose Regulators

Package:: 32-VFQFN Exposed Pad

Datasheet:: PM6652.pdf

Description:: IC REG CTRLR 1OUT 32VFQFPN

Quantity:: RFQ Add To RFQ list

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Inventory:2,008

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Product details

Overview

PM6652 from STMicroelectronics is a single-phase step-down SMPS controller with 7-bit DAC, designed for Intel® IMVP6.5 GPU/CPU and VR11 Atom CPU voltage regulation. It supports 4.5–36 V input, 0.3–1.5 V output, constant-on-time (COT) control, remote sensing, and programmable droop-enabling precise core voltage delivery in mobile notebooks and netbooks.

For engineers reviewing the PM6652 datasheet, PM6652 pinout, PM6652 application, or PM6652 equivalent, key selection criteria include IMVP6.5/VR11 mode compatibility, DCR- or RSENSE-based current sensing, thermal throttling support, and pulse-skipping operation for battery-powered efficiency.

Technical Context

The PM6652 implements a constant-on-time (COT) PWM architecture with embedded integrator loop compensation to correct DC voltage error caused by output ripple. Its dual-mode operation-IMVP6.5 render/CPU and VR11 Atom-is selected via VID pins and DPRSLPVR/CLKEN# inputs, enabling real-time dynamic voltage/frequency scaling across performance and suspend states.

It integrates high-side and low-side gate drivers (HGATE/LGATE), boot diode, and supports lossless inductor DCR or precision resistor (RSENSE) current sensing. Protection includes latched OVP (+200 mV), UVP (−300 mV), overtemperature, and negative current limit-critical for CPU/GPU rail stability under fast load transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5 V to 36 V - supports wide-input industrial and mobile adapter/battery sources.
Output Voltage Range	0.3 V to 1.5 V - matches Intel IMVP6.5 and VR11 CPU/GPU core voltage requirements.
Voltage Identification	7-bit VID interface - enables dynamic voltage programming per Intel specification with LSB-to-MSB mapping on VID0–VID6.
Control Architecture	Constant-on-time (COT) - delivers ultra-fast load transient response without external compensation.
Current Sensing	Lossless DCR or RSENSE-based - eliminates sense resistor power loss or enables high-accuracy reporting via IMON output.
Protection Features	Latched OVP (+200 mV), UVP (−300 mV), thermal shutdown, and valley current limit - ensures robust rail integrity during fault conditions.
Operating Temperature	−40 °C to +125 °C junction - qualified for mobile platform thermal environments including GPU proximity.

Pinout & Package

PM6652 is housed in a VFQFPN-32 5 × 5 mm package with exposed pad (EP), optimized for thermal dissipation in space-constrained mobile applications.

Pin/Terminal	Circuit Role	Design Meaning
1 VRTT#	Thermal throttling indicator	Open-drain output signaling thermal event; used to throttle CPU/GPU activity when THERM threshold exceeded.
2 THERM	Thermal monitoring input	Connects to NTC thermistor divider for MOSFET/inductor temperature feedback-enables adaptive thermal management.
4 VSNS / 3 GSNS	Remote voltage sense inputs	Differential pair measuring output at load point-eliminates IR drop errors in high-current CPU/GPU rails.
5 CSNS / 6 VOUT	Current sense & feedback node	CSNS is positive input of differential current comparator; VOUT is negative input-supports droop and IMON functions.
19 LGATE / 23 HGATE	Gate driver outputs	Drive external N-channel MOSFETs in synchronous buck topology; integrated boot diode reduces BOM count.
26–32 VID0–VID6	Voltage identification inputs	7-bit parallel interface setting DAC output-directly maps to Intel IMVP6.5/VR11 voltage codes per mode tables.
17 DPRSLPVR	Suspend state control	Selects pulse-skipping (low-power) vs. forced PWM (high-performance) mode-key for Intel render/CPU suspend/resume behavior.

Key Features

Feature	Design Value
Dynamic voltage positioning (Droop)	Programmable via ILIM resistor-enables intentional output voltage sag under load to maintain stable current sharing in multi-phase systems.
Output ripple compensation	Embedded integrator loop-actively cancels DC error induced by output capacitor ESR/ESL ripple, improving regulation accuracy.
Soft-start and soft-end	Controlled via SSTART pin-prevents inrush current and enables graceful power-down sequencing for CPU/GPU cores.
Current monitor (IMON)	Analog output proportional to inductor current-supports real-time current telemetry and system-level power management decisions.
Thermal throttling	Hardware-based THERM/VRTT# interface-triggers immediate CPU/GPU frequency reduction before thermal shutdown occurs.

Applications

Intel Mobile GPU (IMVP6.5 Render Core)

Intel Mobile CPU (IMVP6.5 LV/ULV)

Use Scenario: Powering the graphics render engine in ultrabooks and convertible laptops requiring rapid voltage scaling during GPU workload transitions.

IC Role / Device Role / Timing Role: Single-phase VR controller delivering dynamically adjusted 0.4–1.1 V core supply with sub-10 µs transient response using COT architecture.

Use Value: Enables real-time GPU frequency/voltage coordination per IMVP6.5 spec-reducing idle power by >40% versus fixed-frequency controllers.

Use Scenario: Regulating low-voltage CPU cores in fanless tablets and netbooks where thermal headroom is constrained and light-load efficiency is critical.

IC Role / Device Role / Timing Role: IMVP6.5-compliant controller operating in pulse-skipping mode during DPRSLPVR assertion-maintaining regulation at <1 mA quiescent current.

Use Value: Extends battery life by 22% in suspend states while preserving fast wake-up latency (<50 µs) via hardware-controlled soft-start.

Intel Atom® VR11 CPU Systems

Notebook/Netbook Mainboard VR

Use Scenario: Supplying 7-bit VID-configurable voltage to Intel Atom processors in embedded edge devices and thin clients requiring VR11 compliance.

IC Role / Device Role / Timing Role: VR11 mode-selected controller supporting VID step transitions ≤200 ns-meeting Intel's strict timing window for voltage slewing.

Use Value: Eliminates need for external VID translators; achieves ±0.5% VCORE accuracy across −40 °C to +85 °C ambient.

Use Scenario: Primary CPU/GPU voltage regulator on compact notebook mainboards with tight layout constraints and aggressive thermal targets.

IC Role / Device Role / Timing Role: Integrated gate driver + boot diode + thermal sensing controller-reduces discrete component count by 7 parts versus discrete driver solutions.

Use Value: Lowers PCB area by 28% and improves thermal resistance (R_thJA = 35 °C/W) via exposed-pad VFQFPN-32 package.

Equivalent & Alternatives

The following parts are listed as comparable options for similar CPU/GPU voltage regulation applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ISL6268	Supports IMVP6.5 only; no VR11 mode; uses external gate drivers and separate current sense amplifier.	Lacks integrated boot diode and VR11 compatibility-requires additional components for Atom platforms.	Choose ISL6268 only for legacy IMVP6.5-only designs where board space and BOM count are secondary to proven field reliability.
RT8803A	Single-phase VR11 controller with 6-bit VID; no IMVP6.5 support; lower max input (24 V); no thermal throttling pin.	Cannot replace PM6652 in dual-mode (GPU+CPU) designs; unsuitable for high-temperature GPU proximity layouts.	Select RT8803A only for cost-sensitive VR11-only Atom modules where thermal monitoring is handled externally.

Compared with ISL6268 and RT8803A, the PM6652 uniquely combines IMVP6.5 and VR11 mode support in one IC, integrates gate drivers and boot diode, and provides hardware thermal throttling-making it the sole option for space-constrained dual-core mobile platforms requiring both GPU and CPU rail control.

Availability

PM6652 is available at Aetrix Electronics and suitable for Intel mobile GPU rendering, mobile CPU voltage regulation, and Atom-based VR11 computing platforms requiring stable component supply across long-life production cycles.

Supply support for PM6652 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

STMicroelectronics is a global semiconductor leader specializing in power management, microcontrollers, and analog ICs for automotive, industrial, and consumer applications.

The PM6652 belongs to ST's dedicated CPU/GPU voltage regulator product line, engineered specifically for Intel mobile platform compliance-including IMVP6.5 and VR11 specifications-with emphasis on thermal resilience and fast transient performance.

FAQ

What Intel specifications does the PM6652 support?

The PM6652 fully supports Intel IMVP6.5 for mobile GPU render cores and LV/ULV CPUs, plus VR11 for Atom processors. It implements all required timing, VID encoding, droop, and suspend/resume behaviors per official Intel documentation (Doc ID 16867 Rev 5), including DPRSLPVR pulse-skipping and VID5 transition profiles.

How is current sensing implemented on the PM6652?

The PM6652 supports two current sensing methods: lossless inductor DCR sensing via CSNS/VOUT differential inputs, or precision resistor (RSENSE) sensing with external components. Both feed the same internal current comparator and enable IMON analog current reporting with ±3% accuracy across temperature and load.

Does the PM6652 require external gate drivers?

No. The PM6652 integrates high-side (HGATE) and low-side (LGATE) MOSFET gate drivers capable of driving standard 12 V logic-level N-channel MOSFETs. It also embeds a boot diode, eliminating the need for an external bootstrap diode in typical synchronous buck configurations.

What protection features are hardware-latched versus auto-recoverable?

OVP (+200 mV), UVP (−300 mV), and overtemperature faults trigger latched shutdown-requiring COREON de-assertion and re-assertion to reset. Pulse-skipping mode, soft-start, and IMON reporting remain functional during non-latched events like transient overcurrent or thermal throttling (VRTT# assertion).

PM6652 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: 32-VFQFN Exposed Pad

Packaging:: Tray

Product Status:: Obsolete

Applications:: Controller, Intel IMVP-6.5™, VR11

Voltage - Input:: 4.5V ~ 36V

Number of Outputs:: 1

Voltage - Output:: 0.3V ~ 1.5V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 32-VFQFPN-EP (5x5)

PM6652 FAQ

1.How can I place an order for PM6652 through Aetrix?

Please submit a Request for Quotation (RFQ) for PM6652 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 PM6652 reliable?

The price and inventory of PM6652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PM6652 is usually 5 days.

3.What payment methods are accepted for PM6652?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PM6652 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PM6652?

PM6652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PM6652 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 PM6652?

For technical support, including PM6652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PM6652 requirements.

6.How does Aetrix verify that PM6652 is sourced from the original manufacturer or authorized distributors?

All PM6652 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 PM6652 meets industry standards.

7.What is the process for return or replacement of PM6652?

All PM6652 units undergo pre-shipment inspection (PSI). If there is an issue with PM6652, 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 PM6652 part is unused and in its original packaging.

Return procedure for PM6652:

1.Submit a request within 90 days.

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

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