Analog Devices Inc. ADP3190JRQZ-RL

Overview

ADP3190JRQZ-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, achieves ±9.5 mV differential sensing error over temperature, and drives external high-power MOSFET drivers via logic-level PWM outputs - deployed in desktop PC VRM modules and next-generation game console power supplies.

For engineers reviewing the ADP3190JRQZ-RL datasheet, ADP3190JRQZ-RL pinout, ADP3190JRQZ-RL application, or ADP3190JRQZ-RL equivalent, key selection criteria include phase configurability (2/3/4), VID-programmable output range, current-balancing accuracy, soft-start and latch-off delay programmability, and compatibility with 12 V system supply via internal shunt regulator.

Technical Context

The ADP3190JRQZ-RL implements a multimode PWM Flex-Mode™ architecture with independent phase enable/disable via PWM3/PWM4 grounding, enabling dynamic reconfiguration between 2-, 3-, and 4-phase operation. Its internal 6-bit DAC reads Intel-compatible VID codes to set output voltage, while active current balancing uses SW1–SW4 inputs to monitor per-phase switch-node currents and correct thermal imbalance in real time.

It integrates differential remote sensing (FB/FBRTN), programmable current-limit protection (via ILIMIT resistor), and crowbar blanking during on-the-fly VID changes. The controller operates from a 12 V input via internal shunt regulator (240 Ω series resistor), delivers 5 V to internal circuitry, and features UVLO at 6.3–8.0 V with 0.9 V hysteresis.

Key Specifications

Pinout & Package

ADP3190JRQZ-RL is housed in a 28-lead TSSOP package (JEDEC MO-153, 9.7 mm × 4.4 mm, 0.65 mm pitch), thermally enhanced for high-power VRM applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ADP3188ARQZ-RL and ISL6322IRZ-T, ADP3190JRQZ-RL uniquely combines 12 V direct input support, per-phase current monitoring (SW1–SW4), and programmable droop without sacrificing pin compatibility with legacy ADP3188 layouts - making it optimal for VRM upgrades requiring enhanced thermal management and simplified biasing.

Availability

ADP3190JRQZ-RL is available at Aetrix Electronics and suitable for desktop PC VRM modules, Intel® processor core power supplies, and game console power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for ADP3190JRQZ-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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADP3190JRQZ-RL belongs to Analog Devices' VRM/VRD controller product line, engineered specifically for high-efficiency, multiphase CPU core power delivery in Intel-compatible platforms with emphasis on transient response, thermal balancing, and VID compliance.

FAQ

What is the function of the SW1–SW4 pins on the ADP3190JRQZ-RL?

The SW1–SW4 pins on the ADP3190JRQZ-RL serve as per-phase current balance inputs, sampling switch-node voltages to enable real-time active current balancing across all enabled phases. This function ensures thermal uniformity and improves reliability in high-current VRM designs. Each SWx pin connects to the corresponding buck stage's high-side switch node, and the ADP3190JRQZ-RL uses these signals internally to adjust PWM duty cycles and maintain ≤±5% inter-phase current matching under dynamic load conditions.

How does the ADP3190JRQZ-RL support on-the-fly VID code changes?

The ADP3190JRQZ-RL supports on-the-fly VID code changes through built-in crowbar blanking and power-good (PWRGD) delay logic. When the CPU updates its VID code, the ADP3190JRQZ-RL temporarily suppresses PWRGD assertion and disables crowbar triggering for 100–250 μs, allowing smooth voltage transition without false fault detection. This behavior is hardwired and requires no external configuration - ensuring robust operation during Intel SpeedStep® or dynamic voltage scaling events.

Can the ADP3190JRQZ-RL operate from a 5 V system supply?

No, the ADP3190JRQZ-RL is designed for 12 V system supply operation only, utilizing an internal shunt regulator that requires a 240 Ω series resistor from 12 V to the VCC pin to generate its internal 5 V rail. For 5 V input operation, the pin-compatible ADP3190A variant must be used - it substitutes a 10 Ω resistor and adjusts UVLO thresholds accordingly. Using ADP3190JRQZ-RL with 5 V violates absolute maximum ratings and will prevent proper startup.

What determines the actual switching frequency per phase in the ADP3190JRQZ-RL?

The actual switching frequency per phase in the ADP3190JRQZ-RL is determined by dividing the master oscillator frequency (set by the RT pin resistor) by the number of active phases. For example, with RT = 100 kΩ (≈400 kHz master clock) and 4-phase operation, each phase switches at 100 kHz; with PWM3+PWM4 grounded (2-phase), the frequency becomes 200 kHz per phase. This division is handled internally and ensures consistent phase interleaving regardless of configuration.

How is current limit protection configured on the ADP3190JRQZ-RL?

Current limit protection on the ADP3190JRQZ-RL is configured using an external resistor from the ILIMIT pin to GND, which sets a threshold voltage of 105–145 mV (with 10.4 mV/μA scaling). When the CSREF–CSCOMP differential exceeds this threshold, the controller enters current-limit mode, clamping COMP voltage to hold average output current constant. A second RC network on the DELAY pin then determines the latch-off delay time - typically 1.5 ms with 250 kΩ/12 nF - before full shutdown.