Analog Devices Inc. ADP3190AJRQZ-RL

Overview

ADP3190AJRQZ-RL from Analog Devices is a 6-bit programmable, 2-/3-/4-phase synchronous buck controller optimized for Intel® processor core voltage regulation. It delivers 0.8375 V to 1.6 V output via VID interface, supports up to 1 MHz per phase, and features ±9.5 mV differential sensing error over temperature. Its logic-level PWM outputs drive external high-power MOSFET drivers in desktop PC VRM modules.

For engineers reviewing the ADP3190AJRQZ-RL datasheet, ADP3190AJRQZ-RL pinout, ADP3190AJRQZ-RL application, or ADP3190AJRQZ-RL equivalent, key selection criteria include phase configurability (2/3/4), active current balancing, programmable short-circuit latch-off delay, VID-based dynamic voltage positioning, and compatibility with 12 V system supply using internal shunt regulator.

Technical Context

The ADP3190AJRQZ-RL implements a multimode PWM Flex-Mode™ architecture with independent phase control logic, enabling precise load transient response and thermal balancing across up to four phases. Its internal 6-bit DAC reads VID codes directly from Intel processors to set output voltage, while the CSSUM/CSCOMP current-sense interface supports DCR- or resistor-based total output current measurement.

Phase configuration is determined at startup by grounding PWM3/PWM4 pins, with automatic detection of 2-, 3-, or 4-phase operation. The device uses a programmable RT-resistor oscillator and RAMPADJ-adjustable internal ramp slope to optimize switching frequency and transient performance without requiring external clock synchronization.

Key Specifications

Pinout & Package

ADP3190AJRQZ-RL is housed in a 28-lead TSSOP package with exposed pad for thermal management. Pin functions are validated per Analog Devices Rev. A datasheet Figure 2 and Table 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar multiphase buck controller applications.

Compared with ADP3190A and ADP3188, ADP3190AJRQZ-RL uniquely integrates a 12 V shunt regulator, supports higher per-phase frequency (1 MHz), and delivers improved current-balancing accuracy-making it optimal for new 12 V-input Intel VRM implementations requiring minimal BOM count and thermal headroom.

Availability

ADP3190AJRQZ-RL is available at Aetrix Electronics and suitable for desktop PC VRMs, game console power supplies, and Intel processor reference designs requiring stable component supply, long-lifecycle support, and verified thermal performance.

Supply support for ADP3190AJRQZ-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, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision electronics.

The ADP3190AJRQZ-RL belongs to Analog Devices' VRM/VRD-compliant multiphase controller product line, designed specifically for high-current, low-voltage CPU core power delivery in Intel-based platforms.

FAQ

What is the function of the RAMPADJ pin on the ADP3190AJRQZ-RL?

The RAMPADJ pin on the ADP3190AJRQZ-RL sets the slope of the internal PWM ramp by accepting an external resistor from the converter input voltage. This adjustment directly influences transient response speed and stability margin-critical for maintaining regulation during rapid CPU load steps. A properly configured RAMPADJ ensures optimal feed-forward behavior without requiring additional compensation components in the voltage loop.

How does the ADP3190AJRQZ-RL achieve active current balancing across phases?

The ADP3190AJRQZ-RL achieves active current balancing by monitoring individual phase currents through dedicated SW1–SW4 inputs, comparing them against a common reference, and dynamically adjusting PWM duty cycles via its internal current-balancing circuit. This closed-loop method maintains ≤5% inter-phase current mismatch under steady-state and transient conditions, reducing thermal hotspots and extending MOSFET lifetime in high-current VRM applications.

Can the ADP3190AJRQZ-RL operate with a 5 V system supply?

No-the ADP3190AJRQZ-RL is specifically designed for 12 V system supply operation using its integrated shunt regulator and 240 Ω series resistor. For 5 V input, the pin-compatible ADP3190A variant must be used instead. Attempting to power ADP3190AJRQZ-RL from 5 V will result in insufficient VCC voltage and failure to meet UVLO thresholds (6.3–8.0 V).

What is the purpose of the CSSUM and CSCOMP pins on the ADP3190AJRQZ-RL?

The CSSUM pin on the ADP3190AJRQZ-RL serves as the current-sense summing node, receiving weighted signals from each phase's switch node to compute total output current. The CSCOMP pin provides the compensation point for the current-sense amplifier, where an external RC network sets gain and bandwidth-enabling precise load-line positioning and accurate current-limit detection aligned with Intel VRM specifications.

Does the ADP3190AJRQZ-RL support dynamic VID voltage changes during operation?

Yes-the ADP3190AJRQZ-RL supports dynamic VID changes with built-in blanking intervals: 100–250 μs for PWRGD assertion and 100–250 μs for crowbar blanking. These intervals prevent false fault triggering during CPU-initiated voltage transitions, ensuring uninterrupted operation while maintaining ±9.5 mV regulation accuracy before and after each VID update.