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Renesas ISL8022IRZ-T
- Part No.:
- ISL8022IRZ-T
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL8022IRZ-T.pdf
- Description:
- IC REG BCK ADJ 2A/1.7A DL 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,721
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Product details
Overview
ISL8022IRZ-T 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. It features 180° out-of-phase switching, 0.6V reference voltage, and integrated power-good monitoring for Li+-powered microcontroller and FPGA power rails.
For engineers reviewing the ISL8022IRZ-T datasheet, ISL8022IRZ-T pinout, ISL8022IRZ-T application, or ISL8022IRZ-T equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to the ISL8022IRZ-T package and performance envelope.
Technical Context
The ISL8022IRZ-T implements current-mode PWM control with internal slope compensation and transconductance error amplifiers per channel, enabling fast transient response and stable loop behavior across 2.8V–5.5V input. Its dual-channel architecture uses independent enable (EN1/EN2), feedback (FB1/FB2), and switching nodes (LX1/LX2) with shared PGND2 ground reference.
It supports three operational modes via the SYNC pin: forced PWM (SYNC ≤ 0.4V), PFM/PWM auto-switching (SYNC ≥ 1.5V), and external synchronization up to 8MHz (falling-edge triggered). Each channel includes peak current limiting (3.2A Ch1 / 2.8A Ch2), negative current detection (−1.6A), hiccup-mode short-circuit protection, and thermal shutdown at 150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A (Ch1) / 1.7A (Ch2) continuous - supports dual-core SoC or FPGA core/I/O rail separation without external current sharing. |
| Switching Frequency | 2.25MHz fixed (PWM) - enables use of 1.2µH inductors and compact 10µF ceramic output capacitors, reducing total solution size to <1.8cm². |
| Quiescent Current | 40µA (PFM mode, both channels) - extends battery runtime in always-on subsystems like sensor hubs or low-power MCU sleep states. |
| Feedback Reference | 0.6V ±1% - allows precise low-voltage regulation down to 0.6V with standard resistor dividers; supports 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V outputs. |
| Input Voltage Range | 2.8V to 5.5V - compatible with single Li+ cell (2.7–4.2V), three NiMH cells (~3.6V), or regulated 5V supplies in portable and embedded systems. |
| Power-Good Delay | 1ms rising-edge delay - provides reliable sequencing signal for downstream logic after both outputs stabilize within regulation tolerance. |
| Thermal Resistance | θJA = 41°C/W (4×3mm DFN) - enables 2A operation at +85°C ambient without forced airflow when PCB has adequate copper area and vias to exposed pad. |
Pinout & Package
ISL8022IRZ-T is housed in a RoHS-compliant, thermally enhanced 4mm × 3mm 12-lead DFN package (L12.4x3) with 1mm max height and exposed thermal pad requiring connection to PGND2 for optimal electrical and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 | Channel 1 feedback input | Negative input to transconductance error amplifier; sets VOUT1 via resistor divider; also used for PG and UVLO monitoring. |
| EN1 | Channel 1 enable | Active-high logic input; enables VOUT1 and initiates soft-start; pulls output capacitor to ground during shutdown. |
| PG | Power-Good open-drain output | 1ms-delayed active-low signal indicating both VOUT1 and VOUT2 are within ±1.5% of nominal; internal 1MΩ pull-up. |
| VIN1 | Channel 1 input supply | Primary input for Ch1 power stage; requires local 10µF ceramic decoupling to PGND1. |
| LX1 | Channel 1 switch node | Connection point to inductor; carries high di/dt switching current; must be routed with minimal loop area. |
| PGND1 | Channel 1 power ground | Return path for Ch1 high-side/low-side MOSFETs; separate from PGND2 to reduce noise coupling between channels. |
| PGND2 | Channel 2 power ground & system ground | Common return for Ch2 power stage and logic bias (VIN2); must connect to exposed thermal pad for thermal and EMI control. |
| LX2 | Channel 2 switch node | Connection point to Ch2 inductor; 180° out-of-phase with LX1 to reduce input RMS current and EMI peaks. |
| VIN2 | Channel 2 input & logic bias | Supplies Ch2 power stage and internal logic; must be ≥ VIN1; requires 10µF ceramic decoupling to PGND2. |
| SYNC | Mode selection & sync input | Configures PFM (≥1.5V), forced PWM (≤0.4V), or external sync (falling-edge triggered up to 8MHz). |
| EN2 | Channel 2 enable | Active-high logic input; enables VOUT2 independently; supports staggered power sequencing with EN1. |
| FB2 | Channel 2 feedback input | Negative input to Ch2 error amplifier; sets VOUT2 independently; shares same 0.6V reference and accuracy spec as FB1. |
Key Features
| Feature | Design Value |
|---|---|
| 180° out-of-phase operation | Reduces input ripple current by ~30% and lowers EMI filter component stress compared to in-phase dual bucks. |
| Start-up with pre-biased output | Allows safe power-up into existing output voltage (e.g., hot-swap or backup rail scenarios) without reverse current flow. |
| Negative current detection | Trips at −1.6A valley current to prevent reverse conduction damage during light-load discontinuous conduction mode. |
| 100% duty cycle capability | Enables ultra-low dropout operation (e.g., 3.3V→3.0V) when input approaches output voltage, critical for battery end-of-life support. |
| Internal soft-start ramp | 1.3ms linear voltage ramp prevents inrush current and avoids undershoot on downstream LDOs or memory rails. |
| Soft-discharge on shutdown | 80–130Ω internal discharge FET actively pulls VOUT1/VOUT2 to ground, eliminating hold-up time and enabling safe system reset. |
Applications
| Microcontroller Core Power | FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Powering ARM Cortex-M7 core at 1.2V/1.5A and auxiliary peripherals at 3.3V/0.8A from single Li+ cell. IC Role / Device Role / Timing Role: Dual-output DC/DC regulator providing tightly regulated, sequenced, low-noise core and I/O voltages with independent enable control. Use Value: Eliminates need for discrete LDOs or second converter; 97% peak efficiency at 1.2V/1.5A extends runtime by >12% vs. linear regulators. |
Use Scenario: Supplying 1.8V/1.7A to FPGA I/O banks and 2.5V/2A to core logic in industrial PLC module. IC Role / Device Role / Timing Role: High-current POL regulator with 180° phase shift minimizing input capacitor stress and EMI in dense PCB layouts. Use Value: 2.25MHz operation allows 1.2µH inductors and 22µF ceramic caps-reducing footprint by 40% vs. 500kHz solutions. |
| Barcode Reader Power Management | Test Equipment DC/DC Module |
|
Use Scenario: Battery-powered handheld scanner requiring 3.3V/1.2A for imager and 1.8V/0.6A for Bluetooth radio. IC Role / Device Role / Timing Role: Low-IQ dual buck delivering high light-load efficiency (40µA) and fast load transient response for burst-mode operation. Use Value: PFM mode achieves >85% efficiency at 10mA load, doubling battery life in standby versus fixed-frequency alternatives. |
Use Scenario: Modular bench power supply generating 5V/2A and 3.3V/1.7A from 12V input in automated test fixture. IC Role / Device Role / Timing Role: Synchronous buck pair with external SYNC input enabling precise frequency alignment to system clock for EMI compliance testing. Use Value: 5.4–8MHz sync range allows EMI energy shifting away from sensitive measurement bands without changing inductor values. |
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 |
|---|---|---|---|
| TPS65270PWP | 2.5A/1.5A dual buck, 2.2MHz, 25µA IQ, but no PFM mode or negative current protection. | Requires external circuitry for pre-bias start-up and lacks hiccup-mode short-circuit recovery. | Preferred where lowest quiescent current is critical and light-load efficiency is less important than absolute IQ. |
| RTQ2134B-QA | 2A/2A dual buck, 2.1MHz, AEC-Q100 qualified, 60µA IQ, includes spread-spectrum modulation. | Designed for automotive ADAS cameras; higher cost and qualification overhead not needed for industrial/portable use. | Selected only when automotive-grade reliability and EMI reduction via spread spectrum are mandatory requirements. |
Compared with TPS65270PWP and RTQ2134B-QA, the ISL8022IRZ-T uniquely combines 40µA PFM IQ, 180° phase shift, negative current protection, and soft-discharge shutdown in a 4×3mm DFN-making it optimal for space-constrained, battery-sensitive portable designs where robust fault handling is required.
Availability
ISL8022IRZ-T is available at Aetrix Electronics and suitable for microcontroller power delivery, FPGA I/O rail generation, and portable barcode reader applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8022IRZ-T 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 supply-chain responsibility for legacy Intersil power management ICs including the ISL8022 family.
The ISL8022 product line was designed specifically for high-efficiency, low-quiescent-current dual-output DC/DC conversion in space- and battery-constrained portable electronics, emphasizing small solution size, light-load efficiency, and robust protection features.
FAQ
What is the maximum input voltage rating for the ISL8022IRZ-T?
The ISL8022IRZ-T has an absolute maximum input voltage rating of 6V DC or 7V for durations up to 20ms. The recommended operating range is 2.8V to 5.5V, making it ideal for single Li+ cells (2.7–4.2V), three NiMH cells (~3.6V), or regulated 5V supplies. Exceeding 6V continuously risks permanent damage to the internal P-channel MOSFETs and control circuitry.
Does the ISL8022IRZ-T support independent voltage setting for each channel?
Yes, the ISL8022IRZ-T supports fully independent output voltage configuration via separate FB1 and FB2 pins. Each channel uses the same 0.6V internal reference, so VOUT1 = 0.6V × (1 + R2/R1) and VOUT2 = 0.6V × (1 + R5/R6), allowing distinct voltages such as 1.2V/1.8V or 2.5V/3.3V without cross-regulation impact.
How does the ISL8022IRZ-T handle output short-circuit conditions?
The ISL8022IRZ-T employs hiccup-mode short-circuit protection: upon detecting 17 consecutive overcurrent events, it shuts down for four soft-start periods (~5.2ms total), then attempts automatic restart. During hard shorts, negative current detection at −1.6A forces tri-state mode and active discharge until regulation recovers-preventing thermal runaway and MOSFET failure.
Can the ISL8022IRZ-T operate with pre-biased outputs during startup?
Yes, the ISL8022IRZ-T supports start-up into pre-biased outputs. Its control architecture prevents reverse current flow by disabling the low-side MOSFET until the output voltage falls below the target regulation level, enabling safe integration in hot-swap, redundant, or backup power systems without external diodes or controllers.
What thermal performance can be expected from the ISL8022IRZ-T in a typical 4-layer PCB layout?
In a standard 4-layer PCB with 2oz copper, 6 thermal vias under the exposed pad, and 200mm² of inner-layer copper pour connected to PGND2, the ISL8022IRZ-T achieves θJA ≈ 41°C/W. At 2A/1.7A full load and +25°C ambient, junction temperature rises ~35°C-well within the −40°C to +125°C recommended operating range and below the 150°C thermal shutdown threshold.
ISL8022IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T FAQ
1.How can I place an order for ISL8022IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8022IRZ-T 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-T reliable?
The price and inventory of ISL8022IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8022IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8022IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8022IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8022IRZ-T?
ISL8022IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8022IRZ-T 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-T?
For technical support, including ISL8022IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8022IRZ-T requirements.
6.How does Aetrix verify that ISL8022IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8022IRZ-T 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-T meets industry standards.
7.What is the process for return or replacement of ISL8022IRZ-T?
All ISL8022IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8022IRZ-T, 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-T part is unused and in its original packaging.
Return procedure for ISL8022IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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