ISL68124IRAZ-T7A - Digital 4-Phase PWM Controller | Renesas
Référence : ISL68124IRAZ-T7A ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $10.2 | $10,20 |
| 10 | $9.18 | $91,80 |
| 100 | $8.05 | $805,00 |
| 500 | $7.2 | $3 600,00 |
| 1 000 | $6.5 | $6 500,00 |
ISL68124IRAZ-T7A Présentation
A digital PWM controller is an IC that regulates DC voltage in multiphase buck converter topologies by generating precisely timed pulse-width modulated signals. It belongs to the power management IC hierarchy: PWM controller -> DC-DC controller -> voltage regulator -> power management IC. Digital controllers such as the ISL68124 use a microcontroller core to implement control loops, telemetry, and PMBus communication, replacing analog compensation networks with firmware-based control and providing real-time configurability, telemetry, and adaptive voltage positioning.
Key features include a 0V to 3.05V output voltage sense range per phase, programmable switching frequency up to 1 MHz, integrated MOSFET drivers are absent (external drivers required), adaptive voltage positioning, dynamic phase shedding, and full PMBus 1.3 telemetry including VIN/VOUT/IIN/IOUT/PIN/POUT/TEMP. The device supports current mode control, per-phase current sensing, and overcurrent/overvoltage/undervoltage/over-temperature fault protection with black-box recording.
The ISL68124 architecture pairs Intersil's proprietary digital control loop engine with on-chip non-volatile memory for configuration storage. This eliminates the analog compensation components typical of analog PWM controllers and provides a stable control loop across a wide operating range. The device interfaces with the host through PMBus (SMBus-compatible 2-wire) for telemetry polling and configuration writes, and provides GPIO pins for system-level signaling and fault response.
Typical applications include server/datacenter core VR, telecom and networking ASIC power, high-current graphics and processor rails, FPGA core supplies, and modular POL converters for distributed architectures. The flexible 4-phase capability supports high-current rails such as 240 A+ loads using appropriate external MOSFETs and inductors.
When designing with this part, choose external gate drivers sized for the load current and MOSFET family. PMBus programming requires a unique device address; refer to the manufacturer datasheet for SMBus addressing, pin strap configuration, and GUI setup. External current-sense resistors or inductor DCR sensing must be sized for the per-phase current target.
Alternatives de remplacement direct pour ISL68124IRAZ-T7A — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
ISL68124IRAZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL68134IRAZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL68127IRAZ-T
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ISL68124IRAZ-T7A Valeurs maximales et caractéristiques électriques
| Topologie | Digital multiphase PWM controller |
| Nombre de sorties | 2 (flexibly assigned to 4 phases) |
| Maximum Phases | 4 (X+Y ≤ 4) |
| Phase Configurations | 4+0, 3+1, 2+2, 2+1, 1+1 |
| Switching Frequency Range | 200 kHz to 1 MHz |
| Output Voltage Sense Range | 0 V to 3.05 V |
| Maximum Load Current (per phase, external driver limited) | Up to 240 A total rail (with external MOSFETs) |
| Control Method | Current mode (digital) |
| Communication Interface | PMBus 1.3 (SMBus-compatible 2-wire) |
| Operating Input Voltage Range | 3.3 V (referenced from internal rail) |
| Boîtier | 40-TQFN (5x5 mm) with exposed pad |
| Type de montage | Surface Mount |
| Plage de température de fonctionnement | -40 C to +85 C |
| Statut RoHS | Compliant |
| Gate Driver | External (ISL66xx recommended family) |
| Telemetry | VOUT, IOUT, VIN, IIN, PIN, POUT, TEMP via PMBus |
Configuration des broches de ISL68124IRAZ-T7A
| Broche 1 | PAD — Exposed pad (thermal/ground, refer to datasheet for pin 1 signal) |
| Broche 2 | GPIO1 — General purpose IO 1 |
| Broche 3 | GPIO2 — General purpose IO 2 |
| Broche 4 | GPIO3 — General purpose IO 3 |
| Broche 5 | GPIO4 — General purpose IO 4 |
| Broche 6 | SDA — PMBus serial data |
| Broche 7 | SCL — PMBus serial clock |
| Broche 8 | SALERT — PMBus SMBus alert (active low) |
| Broche 9 | VDD — Supply voltage for digital core |
| Broche 10 | GND — Ground |
| Broche 11 | VSEN1P — Voltage sense rail 1 positive |
| Broche 12 | VSEN1N — Voltage sense rail 1 negative (GND return) |
| Broche 13 | VSEN2P — Voltage sense rail 2 positive |
| Broche 14 | VSEN2N — Voltage sense rail 2 negative (GND return) |
| Broche 15 | ISEN1P — Current sense phase 1 positive |
| Broche 16 | ISEN1N — Current sense phase 1 negative |
| Broche 17 | ISEN2P — Current sense phase 2 positive |
| Broche 18 | ISEN2N — Current sense phase 2 negative |
| Broche 19 | ISEN3P — Current sense phase 3 positive |
| Broche 20 | ISEN3N — Current sense phase 3 negative |
| Broche 21 | ISEN4P — Current sense phase 4 positive |
| Broche 22 | ISEN4N — Current sense phase 4 negative |
| Broche 23 | PWM1 — PWM output phase 1 |
| Broche 24 | PWM2 — PWM output phase 2 |
| Broche 25 | PWM3 — PWM output phase 3 |
| Broche 26 | PWM4 — PWM output phase 4 |
| Broche 27 | UGATE1 — Upper gate driver signal phase 1 |
| Broche 28 | LGATE1 — Lower gate driver signal phase 1 |
| Broche 29 | UGATE2 — Upper gate driver signal phase 2 |
| Broche 30 | LGATE2 — Lower gate driver signal phase 2 |
| Broche 31 | UGATE3 — Upper gate driver signal phase 3 |
| Broche 32 | LGATE3 — Lower gate driver signal phase 3 |
| Broche 33 | UGATE4 — Upper gate driver signal phase 4 |
| Broche 34 | LGATE4 — Lower gate driver signal phase 4 |
| Broche 35 | VDRV — Gate drive supply |
| Broche 36 | ENABLE — Master enable |
| Broche 37 | FAULT — Fault output (open drain) |
| Broche 38 | PGOOD — Power good indicator |
| Broche 39 | RTUNE — Reference tuning input |
| Broche 40 | VDDIO — Digital IO supply |
Applications typiques
ISL68124IRAZ-T7A convient pour 7 applications: Server CPU Core Voltage Regulator, Telecom ASIC and Networking Processor Power, FPGA Core and Transceiver Rail Power, Graphics Card and GPU Power Delivery, Datacenter Distributed POL Architecture, Industrial High-Power Computing Modules, Test and Measurement Equipment Multi-Rail Supplies.
Server CPU Core Voltage Regulator
The ISL68124IRAZ-T7A fits server CPU core VR rails because its X+Y ≤ 4 phase flexibility and 0V to 3.05V output sense range cover typical 0.6V-1.2V CPU rails when configured as 4+0. The PMBus 1.3 interface provides real-time VOUT, IOUT, and POUT telemetry required for server management, and the digital control loop delivers adaptive voltage positioning for transient load steps. With external ISL66xx gate drivers and discrete MOSFETs, the design supports 240 A continuous load currents needed by dual-socket server platforms. The 200 kHz to 1 MHz per-phase frequency range allows optimization of efficiency versus transient response.
Recommandé
Telecom ASIC and Networking Processor Power
The ISL68124IRAZ-T7A's PMBus telemetry and flexible phase assignment (2+2, 3+1) suit telecom ASIC rails where multiple voltage domains must be monitored centrally. The 3.05V output sense range accommodates networking ASICs operating at 0.8V-2.5V rails, and the digital controller eliminates analog compensation component drift over temperature. Dual-output mode lets one ISL68124IRAZ-T7A drive both the core and I/O rails of a single ASIC, saving PCB area versus two single-output controllers. PMBus fault recording (black box) supports field diagnostics in deployed telecom equipment.
Recommandé
FPGA Core and Transceiver Rail Power
High-end FPGAs such as Stratix-class devices require multiple independent voltage rails with tight regulation, and the ISL68124IRAZ-T7A supports this via dual flexible outputs. Configure as 3+1 to power the FPGA core at 240 A and a separate transceiver rail at lower current; per-phase current sharing maintains thermal balance across phases. The 1 MHz switching frequency capability shrinks output inductor size and reduces PCB area versus 300 kHz-class designs. PMBus dynamic VID adjustment supports FPGA performance state changes without requiring external analog pins.
Recommandé
Graphics Card and GPU Power Delivery
The ISL68124IRAZ-T7A drives high-current GPU VRM sections in graphics cards and add-in cards requiring 0.8V-1.2V rails up to 240 A. The 4-phase digital controller provides fast transient response for GPU load steps via adaptive voltage positioning and dynamic phase shedding for light-load efficiency. PMBus telemetry supports real-time GPU power monitoring for board telemetry and adaptive cooling. Combined with appropriate DrMOS or discrete MOSFET stages, the design achieves high power density in space-constrained graphics card form factors.
Recommandé
Datacenter Distributed POL Architecture
Datacenter systems increasingly use distributed point-of-load topologies where multiple ISL68124IRAZ-T7A controllers are managed centrally via PMBus. The device's PMBus 1.3 compliance ensures compatibility with standard system management controllers, and the flexible 4-phase allocation lets one controller power two rails per board. Hot-swap PMBus addressing allows board replacement without reconfiguration. The digital controller's firmware-based compensation eliminates the manual tuning required by analog controllers, accelerating deployment timelines.
Recommandé
Industrial High-Power Computing Modules
Industrial embedded computing modules require robust multi-rail power delivery with telemetry for predictive failure analysis. The ISL68124IRAZ-T7A's PMBus telemetry of PIN, POUT, and TEMP enables condition-based monitoring in industrial deployments. The -40 C to +85 C operating temperature range supports factory automation and outdoor edge-compute enclosures. Dual-output mode powers both SoC core and companion GPU/FPGA in single-board computer designs from a single controller.
Recommandé
Test and Measurement Equipment Multi-Rail Supplies
Bench-top and rack-mount test equipment often require multiple isolated and non-isolated rails with precise regulation and remote monitoring. The ISL68124IRAZ-T7A's dual flexible output supports two independent rails per IC, reducing component count. PMBus interface enables SCPI-over-Ethernet front-ends to read VOUT, IOUT, and POUT for ATE test reports. The wide switching range (200 kHz to 1 MHz) lets designers balance EMI margins against transient response for instrumentation-grade output ripple.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ISL68124IRAZ-T7A — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ISL68124IRAZ | ISL68134IRAZ | ISL68127IRAZ-T |
|---|---|---|---|---|
| Package | 40-TQFN (5x5) | 40-TQFN (5x5) - same | 40-TQFN (5x5) - same | 40-TQFN (5x5) - same |
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics |
| Maximum Phases | 4 (X+Y ≤ 4) | 4 | 4 (extended family) | 7 |
| Switching Frequency | 200 kHz to 1 MHz | 200 kHz to 1 MHz | 200 kHz to 1 MHz | 200 kHz to 1 MHz |
| Output Voltage Sense Range | 0 V to 3.05 V | 0 V to 3.05 V | 0 V to 3.05 V | 0 V to 3.05 V |
| PMBus Interface | PMBus 1.3 | PMBus 1.3 | PMBus 1.3 | PMBus 1.3 |
| Control Method | Digital current mode | Digital current mode | Digital current mode | Digital current mode |
| Gate Driver | External (ISL66xx recommended) | External (ISL66xx) | External (ISL66xx) | External (ISL66xx) |
Principaux différenciateurs
- Flexible dual-output 4-phase assignment in a single IC (vs ISL68127IRAZ-T (7-phase))
- PMBus 1.3 compliance with full telemetry (vs ISL68124IRAZ (non-T7A))
- Digital current-mode control with adaptive voltage positioning (vs ISL68134IRAZ)
Notes de conception
The ISL68124IRAZ-T7A does not include integrated gate drivers. Pair it with external gate drivers such as the ISL6617A or ISL66xx family, sized for the per-phase load current and MOSFET gate charge (Qg). At full-load 240 A across 4 phases, each phase carries 60 A and requires low-Qg DirectFET or DrMOS-class FETs. Estimated: at VIN=12V, VOUT=1.0V, 60 A per phase (Qgx5-stage) the controller itself draws under 100 mA, so power dissipation is dominated by external MOSFETs and inductors - typically 8-12 W at 90% efficiency.
Place the ISL68124IRAZ-T7A on the same side as the external MOSFETs and inductors, keeping the per-phase PWM traces short and matched in length to minimize phase-to-phase timing skew. The exposed pad (pin 1/EP) must be soldered to a continuous ground plane with at least 6 thermal vias to inner copper layers for heatsinking. Route VSEN and ISEN differential pairs as tightly-coupled 50 ohm traces with ground guard on both sides; improper sense routing causes instability and inaccurate telemetry. Keep SMBus (SDA, SCL, SALERT) traces away from PWM switching nodes by at least 3 mm.
Do not exceed the 3.05V absolute maximum on VSEN pins - telemetry faults and device damage can result. Configure PMBus device address via external resistors before initial power-up; do not change address without full power cycle. Ensure PMBus pull-up resistors (typ. 2.2 kohm to 3.3V) are present on SDA, SCL, and SALERT lines. The MTP (multi-time programmable) memory stores configuration; re-writing requires the manufacturer's GUI tool. Phase assignments (X+Y) are software-configurable but must match physical output inductor and gate driver connections.
Informations de conformité
RoHS compliant per Renesas product page. Not AEC-Q100 qualified (industrial/commercial grade). MSL level not in provided data - flagged as [DATA_NEEDED] in specs.
