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Renesas ISL8022IRZ
- Part No.:
- ISL8022IRZ
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL8022IRZ.pdf
- Description:
- IC REG BCK ADJ 2A/1.7A DL 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:9,697
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Product details
Overview
ISL8022IRZ from Renesas Electronics (formerly Intersil) is a dual-channel synchronous buck regulator delivering 2A on Channel 1 and 1.7A on Channel 2, operating at 2.25MHz with 40µA quiescent current in PFM mode, 180° out-of-phase switching for EMI reduction, and optimized for Li+-powered portable electronics requiring compact, high-efficiency DC/DC conversion.
For engineers reviewing the ISL8022IRZ datasheet, ISL8022IRZ pinout, ISL8022IRZ application, or ISL8022IRZ equivalent, key selection considerations include its dual-output independent regulation, 0.6V feedback reference, forced PWM/PFM mode selection via SYNC pin, 2.8V–5.5V input range, and thermal shutdown with hiccup-mode protection - all in a space-constrained 4mm×3mm DFN package.
Technical Context
The ISL8022IRZ implements current-mode PWM control with internal slope compensation and transconductance error amplifiers per channel, enabling fast transient response and stable operation down to 0.6V output. Each channel features independent enable (EN1/EN2), feedback (FB1/FB2), and switching node (LX1/LX2) connections, with shared PGND and dedicated PGND1/PGND2 for optimal noise isolation.
Its 180° phase shift between channels reduces input RMS current ripple and EMI emissions, while negative current detection (-1.6A valley limit) and hiccup-mode overcurrent protection (17-cycle fault counter) provide robust short-circuit resilience. External synchronization up to 8MHz allows precise timing coordination with system clocks without compromising phase relationship.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A (Ch1), 1.7A (Ch2) continuous - supports µC/FPGA core rails and I/O supplies simultaneously |
| Switching Frequency | 2.25MHz fixed (PWM) or variable (PFM) - enables ≤1.2µH inductors and <22µF ceramic output caps |
| Quiescent Current | 40µA total (both channels, PFM mode) - extends battery runtime in always-on low-power states |
| Feedback Reference | 0.6V ±1% - allows precise low-voltage regulation (e.g., 1.2V, 1.8V) with standard resistor dividers |
| Input Voltage Range | 2.8V to 5.5V - compatible with single Li+ cell (3.0–4.2V), three NiMH cells, or regulated 5V bus |
| Power-Good Delay | 1ms rising-edge delay - ensures stable output before system logic release, with internal 1MΩ pull-up |
| Thermal Protection | 150°C shutdown with 25°C hysteresis - prevents damage during sustained overload or poor airflow |
Pinout & Package
ISL8022IRZ is housed in a thermally enhanced 12-lead 4mm × 3mm DFN package (L12.4x3) with exposed thermal pad requiring connection to PGND for electrical integrity and optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 / FB2 | Channel 1 / 2 feedback input | Negative input to transconductance error amplifier; sets output voltage via external resistor divider referenced to 0.6V |
| EN1 / EN2 | Channel 1 / 2 enable input | Active-high logic control; pulls output low and discharges capacitor when disabled - supports power sequencing |
| PG | Power-Good open-drain output | 1ms-delayed active-low signal indicating both outputs are within ±1.5% of regulation; internal 1MΩ pull-up |
| VIN1 / VIN2 | Channel 1 input / Channel 2 bias supply | VIN1 powers Ch1 power stage; VIN2 powers Ch2 stage and logic - must be ≥ VIN1 for proper operation |
| LX1 / LX2 | Channel 1 / 2 switch node | Connection to inductor high-side terminal; carries high di/dt switching current - requires tight layout and ground stitching |
| PGND1 / PGND2 | Power ground for Ch1 / Ch2 | Separate return paths minimize cross-talk; PGND2 also serves as system ground reference |
| SYNC | Mode selection & sync input | Logic-high = PFM mode; logic-low = forced PWM; external clock input (5.4–8MHz) synchronizes switching edges |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase operation | Reduces input capacitor RMS current by ~30%, lowering required capacitance and EMI filter size |
| Pre-biased output start-up | Allows safe turn-on into pre-charged output rails - essential for hot-swap and multi-rail sequencing |
| Negative current detection | Trips at –1.6A valley current to prevent reverse conduction and inductor saturation during light-load transitions |
| 100% duty cycle capability | Enables ultra-low dropout operation (e.g., 3.3V→3.0V) without losing regulation under high input conditions |
| Internal soft-start ramp | 1.3ms controlled voltage ramp minimizes inrush current and avoids undershoot on load transients |
| Hiccup-mode overcurrent protection | After 17 consecutive OC faults, enters 4-cycle restart delay - protects MOSFETs and PCB during sustained shorts |
Applications
| Mobile Processor Power | FPGA Core & I/O Rails |
|---|---|
|
Use Scenario: Powering ARM-based application processors in handheld medical devices with dual-core CPU and integrated GPU. IC Role / Device Role / Timing Role: Dual-output regulator supplying 1.2V CPU core and 1.8V GPU I/O from single Li+ cell, with independent enable sequencing. Use Value: 40µA PFM quiescent current extends battery life >30% vs. fixed-frequency alternatives; 2.25MHz switching enables <10mm² solution size. |
Use Scenario: Delivering tightly regulated 1.0V core and 2.5V auxiliary rails to Xilinx Spartan-7 FPGA in industrial edge gateway. IC Role / Device Role / Timing Role: High-efficiency POL converter with 1ms PG assertion ensuring FPGA configuration completes only after stable VCCINT/VCCAUX. Use Value: 180° phase shift cuts input ripple, reducing bulk capacitor count; negative current limit prevents latch-up during dynamic reconfiguration. |
| Barcode Scanner Module | Test Equipment DC/DC Module |
|
Use Scenario: Compact barcode reader using laser diode and CMOS imager powered from 3.7V Li-ion battery. IC Role / Device Role / Timing Role: Supplies 3.3V imager interface and 1.2V processor core, with EN2-controlled sleep mode activation. Use Value: Forced PWM mode eliminates audible noise during scanning; soft-discharge function clears residual charge before deep sleep entry. |
Use Scenario: Modular benchtop power supply unit generating multiple isolated rails for analog sensor calibration fixtures. IC Role / Device Role / Timing Role: Dual-channel step-down stage feeding downstream LDOs, synchronized to master clock for jitter-sensitive ADC references. Use Value: 8MHz sync capability aligns switching edges across modules, suppressing beat frequencies in multi-channel measurement systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65217C | Integrated PMIC with fuel gauge, RTC, and LDOs; lower max current (1.5A/1.5A); 2.2MHz fixed freq | Targeted at AM335x Sitara SoCs; includes system-level functions beyond regulation | Choose TPS65217C when full power management integration (battery monitoring, reset control) is required alongside regulation |
| MP2144GQ | Single-channel 4A buck; no dual output or phase control; 2.2MHz, 30µA IQ; smaller 3mm×3mm QFN | Requires two ICs for dual-rail designs; lacks PG, SYNC, or negative current protection | Choose MP2144GQ for cost-sensitive single-rail applications where board area is critical and dual-channel coordination is unnecessary |
Compared with TPS65217C and MP2144GQ, the ISL8022IRZ uniquely delivers true dual-channel independent control with 180° phasing, sub-50µA light-load IQ, and comprehensive fault protection - making it optimal for space-constrained, battery-powered systems demanding both efficiency and reliability.
Availability
ISL8022IRZ is available at Aetrix Electronics and suitable for mobile computing, FPGA power delivery, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8022IRZ 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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for legacy power management ICs including the ISL8022 series.
The ISL8022 product line was designed specifically for high-density, battery-operated portable electronics requiring dual independent DC/DC rails with minimal footprint, ultra-low quiescent current, and robust protection - targeting medical, industrial, and communications end equipment.
FAQ
What is the minimum input voltage required for reliable operation of the ISL8022IRZ?
The ISL8022IRZ has an undervoltage lockout (UVLO) threshold of 2.5V (rising) and 2.4V (falling). Reliable operation begins at 2.8V input, which is the lower limit of its specified operating range. Below this, the device disables switching and holds outputs in shutdown state - critical for preserving battery health in Li+-based systems where voltage drops near end-of-discharge.
How does the ISL8022IRZ handle startup into a pre-biased output condition?
The ISL8022IRZ supports pre-biased start-up: when enabled into an already charged output rail, it inhibits initial switching until the feedback voltage falls below the 0.6V reference, then ramps output voltage smoothly via internal soft-start. This prevents reverse current flow and avoids destabilizing downstream circuitry - a key requirement in hot-pluggable modules and multi-rail sequenced systems.
Can the ISL8022IRZ synchronize to an external clock while maintaining 180° phase separation between channels?
Yes. When an external clock (5.4–8MHz) is applied to the SYNC pin, the ISL8022IRZ uses falling edges to trigger alternating channel ON-pulses: the first falling edge initiates Channel 1, the second triggers Channel 2, repeating continuously. This preserves exact 180° phase alignment regardless of sync frequency - enabling EMI reduction and deterministic timing in synchronized multi-converter systems.
What protection mechanisms does the ISL8022IRZ implement against output short circuits?
The ISL8022IRZ employs dual-stage protection: immediate peak current limiting (3.2A Ch1 / 2.8A Ch2) followed by hiccup-mode recovery after 17 consecutive overcurrent events. It also detects negative inductor current (–1.6A) and forces tri-state shutdown with active discharge until regulation resumes. These features prevent thermal runaway and ensure safe recovery without manual intervention or power cycling.
Is the exposed thermal pad on the ISL8022IRZ package electrically connected, and how must it be handled in layout?
Yes, the exposed pad on the ISL8022IRZ is internally connected to PGND2 and must be soldered directly to the PCB's power ground plane using ≥4 thermal vias. Failure to do so degrades thermal resistance (θJC rises from 3°C/W to >15°C/W), risks junction temperature exceedance above 150°C, and compromises long-term reliability - especially under 2A continuous load on Channel 1.
ISL8022IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A, 1.7A
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
ISL8022IRZ FAQ
1.How can I place an order for ISL8022IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8022IRZ 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 ISL8022IRZ reliable?
The price and inventory of ISL8022IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8022IRZ is usually 5 days.
3.What payment methods are accepted for ISL8022IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8022IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8022IRZ?
ISL8022IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8022IRZ 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 ISL8022IRZ?
For technical support, including ISL8022IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8022IRZ requirements.
6.How does Aetrix verify that ISL8022IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8022IRZ 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 ISL8022IRZ meets industry standards.
7.What is the process for return or replacement of ISL8022IRZ?
All ISL8022IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8022IRZ, 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 ISL8022IRZ part is unused and in its original packaging.
Return procedure for ISL8022IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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