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Renesas ISL6522IVZ
- Part No.:
- ISL6522IVZ
- Manufacturer:
- Renesas
- Category:
- DC DC Switching Controllers
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL6522IVZ.pdf
- Description:
- IC REG CTRLR BUCK 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,622
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Product details
Overview
ISL6522IVZ from Renesas Electronics (formerly Intersil) is a voltage-mode synchronous buck PWM controller designed to drive two N-channel MOSFETs in high-performance microprocessor power supplies. It delivers 0.8V reference accuracy (±1% over line/temperature), 200kHz free-running oscillator (adjustable 50kHz–1MHz), 15MHz gain-bandwidth error amplifier, and rDS(ON)-based overcurrent protection - enabling compact, efficient DC-DC conversion for Pentium® and PowerPC® applications.
For engineers reviewing the ISL6522IVZ datasheet, ISL6522IVZ pinout, ISL6522IVZ application, or ISL6522IVZ equivalent, key selection considerations include its TSSOP-14 industrial-grade (-40°C to +85°C) package, single-loop voltage-mode control architecture, 0–100% duty cycle capability, integrated soft-start with 10µA current source, and MOSFET shoot-through protection for bidirectional current handling.
Technical Context
The ISL6522IVZ implements a fixed-frequency voltage-mode PWM control loop with a 200kHz internal oscillator programmable via external RT resistor. Its error amplifier features 15MHz gain-bandwidth and 6V/µs slew rate to support fast transient response in microprocessor VRMs.
Overcurrent protection uses an internal 200µA current source at OCSET to sense voltage drop across the upper MOSFET's rDS(ON), eliminating discrete current-sense resistors. The controller supports both sourcing and sinking output current, requiring careful VIN rail management during reverse conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Architecture | Voltage-mode PWM with single feedback loop - enables stable regulation without current-sense components. |
| Oscillator Frequency | 200kHz typical (50kHz–1MHz adjustable via RT) - sets switching speed for EMI and efficiency trade-offs. |
| Reference Voltage | 0.800V ±1% over line/temperature - ensures tight output regulation down to sub-1V microprocessor core voltages. |
| Error Amplifier GBW | 15MHz - provides high loop bandwidth for rapid load transient recovery in CPU power delivery. |
| Gate Drive Capability | UGATE: 500mA source / LGATE: 450mA source - drives large N-MOSFETs with low gate charge for minimal switching loss. |
| Overcurrent Sensing | rDS(ON)-based, no external resistor - reduces BOM count and improves efficiency by eliminating sense-resistor losses. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and embedded computing environments with thermal margin. |
Pinout & Package
ISL6522IVZ is housed in a 14-lead TSSOP package (JEDEC MO-153, pkg drawing M14.173), RoHS-compliant with matte tin finish and Pb-free plus anneal construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| UGATE | Upper MOSFET gate driver output | Provides high-current (500mA typ) drive to top N-MOSFET; monitored for adaptive shoot-through protection. |
| LGATE | Lower MOSFET gate driver output | Delivers 450mA typ sink/source to synchronous rectifier; enables bidirectional current flow. |
| PHASE | Switch node connection | Connects to upper MOSFET source; serves as return path for UGATE and overcurrent sensing reference. |
| BOOT | Bootstrap supply input | Bias voltage for high-side driver; requires external bootstrap capacitor between BOOT and PHASE. |
| FB | Inverting input of error amplifier | Connects to resistor divider from output; sets regulated voltage via 0.8V internal reference. |
| COMP | Error amplifier output | External compensation node for loop stability; interfaces with RC network on FB path. |
| OCSET | Overcurrent threshold programming | 200µA current source sets trip point using ROCSET and upper MOSFET rDS(ON). |
| SS | Soft-start timing node | 10µA internal current charges external capacitor to ramp output voltage linearly during startup. |
| EN | Enable input (open-collector) | Pull below 1V to disable PWM; initiates soft-start on rising edge when VCC and OCSET exceed POR thresholds. |
| VCC | Main bias supply input | +12V ±10% operation; powers internal circuitry and gate drivers (excluding LGATE, supplied by PVCC). |
| PVCC | Lower gate driver supply | Separate 12V bias for LGATE driver - isolates lower driver from main VCC noise and dropout. |
| GND | Signal ground reference | Common reference for all analog functions including FB, COMP, and OCSET comparator inputs. |
| PGND | Power ground return | Low-impedance return path for lower MOSFET source and high-current switching paths. |
| RT | Oscillator frequency set | Resistor-to-GND or resistor-to-VCC configures switching frequency from 50kHz to >1MHz. |
Key Features
| Feature | Design Value |
|---|---|
| 0–100% duty cycle range | Enables full output voltage adjustment from near 0V up to input rail - critical for low-VOUT microprocessor rails. |
| rDS(ON)-based overcurrent protection | Eliminates external current-sense resistor, reducing cost, board space, and conduction losses in high-current designs. |
| Adaptive shoot-through protection | Monitors UGATE and LGATE transitions to prevent simultaneous conduction - avoids destructive shoot-through current. |
| Integrated soft-start with 10µA current source | Ensures controlled output voltage ramp using only one external capacitor - simplifies design and improves reliability. |
| Separate PVCC supply for LGATE | Decouples lower gate driver from main VCC noise, improving noise immunity and enabling robust synchronous rectification. |
Applications
| Microprocessor Core Supply | High-Current 5V-to-3.xV Regulator |
|---|---|
Use Scenario: Power delivery for Intel Pentium® Pro and PowerPC® processors requiring tightly regulated sub-1V core voltage with fast transient response. IC Role / Device Role / Timing Role: Primary PWM controller managing synchronous buck topology with dual N-MOSFET drive and rDS(ON) current sensing. Use Value: ±1% reference accuracy and 15MHz error amplifier GBW ensure stable 0.8V output under dynamic CPU load steps exceeding 1A/ns. | Use Scenario: High-efficiency step-down conversion from 5V intermediate bus to 3.3V or 2.5V logic rails in telecom and server boards. IC Role / Device Role / Timing Role: Voltage-mode controller providing constant-frequency PWM with 0–100% duty cycle for flexible output voltage scaling. Use Value: Adjustable 50kHz–1MHz switching frequency allows optimization for size (high-freq) or efficiency (low-freq) without changing IC. |
| Distributed Low-Voltage Supply | Industrial Embedded CPU Power |
Use Scenario: Local point-of-load (POL) regulation in distributed power architectures where multiple ICs share a common 12V input bus. IC Role / Device Role / Timing Role: Buck controller supporting bidirectional current flow (source/sink) to manage dynamic load transients across shared bus impedance. Use Value: Current-sinking capability enables active regulation of input rail voltage during transient undershoot, preventing brownouts in multi-rail systems. | Use Scenario: Reliable CPU power in industrial controllers operating continuously at -40°C to +85°C ambient temperature. IC Role / Device Role / Timing Role: Industrial-grade PWM controller with extended temperature qualification and Pb-free RoHS compliance for long-lifecycle deployments. Use Value: TSSOP-14 package with matte tin finish ensures compatibility with both SnPb and Pb-free reflow profiles - simplifying manufacturing transition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL6535 | Drop-in enhanced version with improved thermal performance, tighter reference tolerance (±0.5%), and extended frequency range (up to 1.5MHz). | Designed for new designs requiring higher precision and faster switching; not recommended for legacy ISL6522IVZ footprint reuse without validation. | Select ISL6535 for new designs needing higher accuracy or higher frequency; verify PCB layout compatibility for thermal pad and decoupling. |
| TPS51116 | TI part with integrated MOSFET drivers, 3.3V LDO, and VRD-compatible SVID interface - differs in control architecture (current-mode) and feature set. | Targets modern mobile CPU VRMs with digital interface requirements; lacks rDS(ON) sensing and uses external current-sense resistors. | Choose TPS51116 only when SVID communication or integrated LDO is required; not a functional substitute for ISL6522IVZ's analog voltage-mode control. |
Compared with ISL6522IVZ, ISL6535 offers superior reference accuracy and frequency flexibility but requires layout review for thermal pad integration, while TPS51116 introduces digital control complexity and different sensing methodology - making ISL6522IVZ optimal for cost-sensitive, analog-controlled industrial microprocessor supplies.
Availability
ISL6522IVZ is available at Aetrix Electronics and suitable for microprocessor core supplies, high-current 5V-to-3.xV regulators, and industrial embedded CPU power applications requiring stable component supply across extended temperature ranges.
Supply support for ISL6522IVZ 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
Renesas Electronics Corporation is a global semiconductor leader delivering trusted embedded solutions for automotive, industrial, infrastructure, and IoT applications.
The ISL6522IVZ belongs to Renesas' high-performance analog power management portfolio, specifically engineered for precise, efficient DC-DC conversion in demanding microprocessor and CPU power delivery systems.
FAQ
What is the operating temperature range of the ISL6522IVZ?
The ISL6522IVZ is rated for industrial operation from -40°C to +85°C ambient temperature. This range is confirmed in the official ordering information table (page 2 of FN9030 Rev 8.00), where "ISL6522IVZ" is explicitly listed with "-40 to 85" under TEMP. RANGE (°C). The junction temperature limit is -40°C to +125°C, ensuring reliable performance in thermally demanding embedded computing environments.
Does the ISL6522IVZ require an external current-sense resistor?
No, the ISL6522IVZ does not require an external current-sense resistor. As documented on page 1 of FN9030 Rev 8.00, it uses the rDS(ON) of the upper MOSFET for overcurrent monitoring - a feature explicitly highlighted in the "Features" section and detailed in the "Overcurrent Protection" functional description (pages 6–7). This eliminates sense-resistor losses and reduces BOM cost and board area.
What package type is used for the ISL6522IVZ?
The ISL6522IVZ uses a 14-lead TSSOP package, as specified in the Ordering Information table (page 2 of FN9030 Rev 8.00) and confirmed by the "Pinouts" diagram on page 1. The package drawing number is M14.173, and it is RoHS-compliant with Pb-free plus anneal construction - matching the "ISL6522IVZ" row in the table.
Can the ISL6522IVZ support bidirectional current flow?
Yes, the ISL6522IVZ supports both sourcing and sinking output current, as stated on page 1 ("Converter can source and sink current") and elaborated in the "Current Sinking" section (page 7). This capability enables active regulation during load transients but requires careful design of the VIN rail path to avoid overvoltage - a requirement explicitly called out in the datasheet to prevent damage to MOSFETs or the ISL6522IVZ itself.
What is the reference voltage accuracy of the ISL6522IVZ over temperature and line variation?
The ISL6522IVZ provides a 0.800V internal reference with ±1% tolerance over line voltage and temperature variations for the industrial grade (I-temp) version, as specified in the "Electrical Specifications" table on page 4 of FN9030 Rev 8.00. This accuracy is confirmed under "Reference Voltage Tolerance" with "Industrial" row listing "-2 / - / +1 %", and the text on page 1 states "maximum tolerance of ±1% over temperature and line voltage variations" for the ISL6522 family.
ISL6522IVZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 10.8V ~ 13.2V
- Frequency - Switching:
- 200kHz
- Duty Cycle (Max):
- 100%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- -
- Control Features:
- Enable, Frequency Control, Phase Control, Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
ISL6522IVZ FAQ
1.How can I place an order for ISL6522IVZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6522IVZ 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 ISL6522IVZ reliable?
The price and inventory of ISL6522IVZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6522IVZ is usually 5 days.
3.What payment methods are accepted for ISL6522IVZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6522IVZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6522IVZ?
ISL6522IVZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6522IVZ 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 ISL6522IVZ?
For technical support, including ISL6522IVZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6522IVZ requirements.
6.How does Aetrix verify that ISL6522IVZ is sourced from the original manufacturer or authorized distributors?
All ISL6522IVZ 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 ISL6522IVZ meets industry standards.
7.What is the process for return or replacement of ISL6522IVZ?
All ISL6522IVZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6522IVZ, 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 ISL6522IVZ part is unused and in its original packaging.
Return procedure for ISL6522IVZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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