My Inquiry
My Account
Analog Devices Inc. ADP3191AJRQZ-RL
- Part No.:
- ADP3191AJRQZ-RL
- Manufacturer:
- Analog Devices Inc.
- Category:
- Special Purpose Regulators
- Package:
- 28-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
ADP3191AJRQZ-RL.pdf
- Description:
- 6 BIT, PROGRAMMABLE 2-/3-/4-PHAS
- Quantity:
- Payment:
- Shipping:
Inventory:20,961
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ADP3191AJRQZ-RL from Analog Devices is a 6-bit programmable, 2-/3-/4-phase synchronous buck controller optimized for Intel® VRM/VRD-compliant CPU core supplies. It delivers 0.8375 V to 1.6 V output via VID interface, supports up to 1 MHz per phase, achieves ±14.5 mV worst-case differential sensing error over temperature, and drives external high-power MOSFET drivers via logic-level PWM outputs - deployed in desktop PC power supplies for next-generation Intel processors.
For engineers reviewing the ADP3191AJRQZ-RL datasheet, ADP3191AJRQZ-RL pinout, ADP3191AJRQZ-RL application, or ADP3191AJRQZ-RL equivalent, key selection criteria include phase configurability (2/3/4), VID-programmable output voltage range, differential remote sensing accuracy, active current balancing capability, and compatibility with external gate drivers such as ADP3110A.
Technical Context
The ADP3191AJRQZ-RL implements a multimode PWM Flex-Mode™ architecture with internal 6-bit VID DAC, enabling dynamic output voltage positioning and fast load transient response. Its current-sense amplifier uses CSSUM/CSREF inputs for accurate total output current measurement, supporting DCR- or resistor-based sensing with programmable gain via CSCOMP-CSSUM feedback.
Phase configuration is determined at startup by grounding PWM3/PWM4 pins, enabling 2-, 3-, or 4-phase operation with automatic current balancing across active phases. The RT pin sets master oscillator frequency (0.25–2 MHz), which is divided by the number of active phases to determine per-phase switching frequency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage Range | 0.8375 V to 1.6 V, digitally set via 6-bit VID code for Intel VRM/VRD compliance |
| Differential Sensing Error | ±14.5 mV max over 0°C to +85°C, ensuring tight regulation under thermal stress |
| Phase Configurability | 2-, 3-, or 4-phase operation selected by PWM3/PWM4 pin states, no reprogramming required |
| Max Switching Frequency | 1 MHz per phase, achievable with RT = 30 kΩ in 4-phase mode |
| Current Balance Accuracy | ±5% input current matching between SW1–SW4, enabling thermally balanced multi-phase operation |
| Short-Circuit Protection | Programmable latch-off delay (1.5 ms typical with 250 kΩ/12 nF), preventing false trips during transients |
| Power Good Thresholds | ±250 mV UV/OV window relative to DAC output, with 100–250 μs response during VID changes |
Pinout & Package
ADP3191AJRQZ-RL is housed in a 28-lead TSSOP package (JEDEC MO-153, 4.4 mm × 9.7 mm), rated for 0°C to +85°C ambient operation. Pin 28 (VCC) accepts 12 V system supply via 240 Ω series resistor; all VID, PWM, and current-sense pins are logic-compatible with standard gate drivers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VID0–VID5 (Pins 1–6) | Voltage ID DAC Inputs | Set 0.8375–1.6 V output; open-circuit = "No CPU" shutdown mode |
| FB / FBRTN (Pins 8/7) | Differential Feedback Inputs | Enable remote sensing: FB connects to CPU sense point, FBRTN to sense ground |
| PWM1–PWM4 (Pins 27–24) | Logic-Level PWM Outputs | Drive external gate drivers (e.g., ADP3110A); grounding PWM3+PWM4 configures 2-phase mode |
| SW1–SW4 (Pins 23–20) | Phase Current Sense Inputs | Measure individual phase currents for active balancing; unused pins left open |
| CSREF / CSSUM / CSCOMP (Pins 16/17/18) | Current Sense Amplifier Interface | CSREF = reference node; CSSUM = summing point; CSCOMP = gain/compensation node |
| RT (Pin 13) | Oscillator Frequency Set | Resistor-to-GND sets master clock (0.25–2 MHz); per-phase freq = master / active phases |
| ILIMIT (Pin 15) | Current Limit Threshold | Resistor-to-GND sets 10.4 mV/μA threshold for short-circuit protection |
| DELAY (Pin 12) | Soft Start & Latch-Off Timing | R+C network sets both soft-start ramp time and overcurrent latch-off delay |
Key Features
| Feature | Design Value |
|---|---|
| PWM Flex-Mode™ Architecture | Enables simultaneous optimization of efficiency, ripple reduction, and transient response without sacrificing stability |
| Active Current Balancing | Maintains ≤±5% current mismatch across phases under dynamic load, reducing thermal hotspots |
| VID-Based Dynamic Voltage Positioning | Adjusts output voltage downward under load to match CPU droop requirements, improving power delivery margin |
| Programmable Short-Circuit Latch-Off | Configurable delay prevents nuisance shutdown during brief overload events while ensuring robust fault protection |
| Integrated Power Good Blanking | Suppresses PWRGD assertion during on-the-fly VID changes, enabling seamless CPU voltage scaling |
Applications
| Desktop PC Core Power Supply | Intel® VRM Module |
|---|---|
Use Scenario: Regulating core voltage for dual-core and quad-core Intel Pentium 4 and Core 2 processors in ATX mainboards. IC Role / Device Role / Timing Role: Primary multiphase buck controller managing up to four synchronous buck stages with VID decoding and current balancing. Use Value: Enables stable sub-1 V operation at >100 A with <±15 mV regulation error, meeting VRM 10.x specifications. |
Use Scenario: Integrated into modular VRM solutions for OEM motherboard vendors requiring drop-in CPU power compliance. IC Role / Device Role / Timing Role: Central control IC coordinating phase timing, current sharing, and dynamic VID updates across discrete power stages. Use Value: Reduces BOM count by eliminating external DAC and current-sense amplifiers while supporting programmable load-line slope. |
| Game Console Power Management | High-Performance Workstation PSU |
Use Scenario: Delivering tightly regulated 1.1 V core supply to custom SoCs in Xbox 360 and PlayStation 3 platforms. IC Role / Device Role / Timing Role: Synchronous buck controller interfacing directly with SoC VID bus and driving discrete MOSFET half-bridges. Use Value: Achieves <100 ns VID transition response and crowbar protection within 400 ns, critical for real-time gaming workloads. |
Use Scenario: Supporting Xeon and Itanium processors in dual-socket server motherboards requiring >150 A aggregate current. IC Role / Device Role / Timing Role: 4-phase controller with active thermal balancing across independent power stages mounted on separate PCB zones. Use Value: Distributes thermal load across four phases, lowering peak MOSFET junction temperature by up to 15°C versus single-phase designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multiphase buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6322IRZ | 6-bit VID, 3-/4-phase only; no 2-phase mode; requires external current-sense resistors | Lacks programmable short-circuit latch-off delay; fixed 0.8–1.8 V range | Preferred when higher output voltage ceiling (>1.6 V) and tighter current-sense tolerance (<±2 mV) are required |
| TPS51216RUKR | 5-bit VID (0.5–1.5 V), integrated MOSFET drivers; no external driver support | Fixed 3-phase operation; no SW pin current monitoring or active balancing circuitry | Selected for space-constrained designs where gate driver integration reduces component count |
Compared with ISL6322IRZ and TPS51216RUKR, ADP3191AJRQZ-RL uniquely supports 2-/3-/4-phase flexibility with on-chip current balancing, VID-programmable 0.8375–1.6 V range, and configurable latch-off delay - making it optimal for Intel VRM-compliant systems requiring field-configurable phase count and precise thermal management.
Availability
ADP3191AJRQZ-RL is available at Aetrix Electronics and suitable for desktop PC power supplies, Intel® VRM modules, and game console power management requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ADP3191AJRQZ-RL 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and computing markets since 1965.
The ADP3191AJRQZ-RL belongs to Analog Devices' VRM/VRD-compliant multiphase controller product line, designed specifically for high-current, low-voltage CPU core regulation in Intel-platform systems with emphasis on transient response, thermal balance, and VID compatibility.
FAQ
What is the operating temperature range for the ADP3191AJRQZ-RL?
The ADP3191AJRQZ-RL is specified for commercial operation from 0°C to +85°C ambient temperature. Its internal circuits - including the VID DAC, error amplifier, and current-sense amplifier - maintain guaranteed performance across this full range, with worst-case differential sensing error limited to ±14.5 mV. Junction temperature must not exceed 125°C under continuous operation.
How does the ADP3191AJRQZ-RL configure 2-phase vs. 3-phase operation?
The ADP3191AJRQZ-RL detects phase count at power-up by monitoring PWM3 and PWM4 pin voltages. Grounding PWM4 alone configures 3-phase operation; grounding both PWM3 and PWM4 configures 2-phase mode. PWM1 and PWM2 remain active in all configurations. This detection occurs during the first two oscillator cycles and requires external pull-down resistors ≥25 kΩ to ensure reliable recognition.
Can the ADP3191AJRQZ-RL drive external MOSFETs directly?
No, the ADP3191AJRQZ-RL provides logic-level PWM outputs (0–5 V swing, ±400 μA drive) intended exclusively for interfacing with external gate drivers such as the ADP3110A. It lacks the current drive capability to switch power MOSFETs directly. Each PWM output must connect to a dedicated driver IC that handles high-side/low-side gate charging and dead-time control.
What is the purpose of the RAMPADJ pin on the ADP3191AJRQZ-RL?
The RAMPADJ pin on the ADP3191AJRQZ-RL sets the slope of the internal PWM ramp by accepting an external resistor from the converter input voltage. Adjusting this resistor tunes the current-loop response and improves transient performance. The RAMPADJ input current range is 0–100 μA, and its voltage relative to FB is maintained within ±50 mV to preserve ramp linearity and current-mode stability.
Does the ADP3191AJRQZ-RL support dynamic VID changes during operation?
Yes, the ADP3191AJRQZ-RL supports on-the-fly VID code changes with built-in blanking for PWRGD and crowbar functions. VID transitions propagate to FB within 400 ns, and the power-good signal remains asserted during the change due to programmable blanking. This enables seamless CPU voltage scaling during active execution without system reset or brownout.
ADP3191AJRQZ-RL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 28-SSOP (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Controller, Intel VRM
- Voltage - Input:
- 5V, 12V
- Number of Outputs:
- 4
- Voltage - Output:
- 0.84V ~ 1.6V
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QSOP
ADP3191AJRQZ-RL FAQ
1.How can I place an order for ADP3191AJRQZ-RL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP3191AJRQZ-RL 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 ADP3191AJRQZ-RL reliable?
The price and inventory of ADP3191AJRQZ-RL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP3191AJRQZ-RL is usually 5 days.
3.What payment methods are accepted for ADP3191AJRQZ-RL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP3191AJRQZ-RL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP3191AJRQZ-RL?
ADP3191AJRQZ-RL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP3191AJRQZ-RL 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 ADP3191AJRQZ-RL?
For technical support, including ADP3191AJRQZ-RL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP3191AJRQZ-RL requirements.
6.How does Aetrix verify that ADP3191AJRQZ-RL is sourced from the original manufacturer or authorized distributors?
All ADP3191AJRQZ-RL 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 ADP3191AJRQZ-RL meets industry standards.
7.What is the process for return or replacement of ADP3191AJRQZ-RL?
All ADP3191AJRQZ-RL units undergo pre-shipment inspection (PSI). If there is an issue with ADP3191AJRQZ-RL, 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 ADP3191AJRQZ-RL part is unused and in its original packaging.
Return procedure for ADP3191AJRQZ-RL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ADP3191AJRQZ-RL Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
