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Renesas ISL8022IRZ-T7A
- Part No.:
- ISL8022IRZ-T7A
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL8022IRZ-T7A.pdf
- Description:
- IC REG BCK ADJ 2A/1.7A DL 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,064
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Product details
Overview
ISL8022IRZ-T7A from Renesas Electronics 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 0.6V reference voltage enabling output as low as 0.6V - used in FPGA and µP core power supplies with Li+-cell input.
For engineers reviewing the ISL8022IRZ-T7A datasheet, ISL8022IRZ-T7A pinout, ISL8022IRZ-T7A application, or ISL8022IRZ-T7A equivalent, key selection criteria include dual-output phase control, PFM/PWM mode configurability, negative current protection, soft-discharge shutdown, and 4×3mm DFN package compatibility with high-density POL designs.
Technical Context
The ISL8022IRZ-T7A implements current-mode PWM control with internal slope compensation and transconductance error amplifiers per channel, enabling fast transient response and stable regulation across 0.6V–3.3V outputs. Each channel features independent enable (EN1/EN2), feedback (FB1/FB2), and switching node (LX1/LX2) terminals with dedicated power-ground pins (PGND1/PGND2).
It supports three operational modes via the SYNC pin: forced PWM (SYNC ≤ 0.4V), PFM (SYNC ≥ 1.5V), or external synchronization up to 8MHz (falling-edge triggered). Phase alignment is fixed at 180° between channels, and both channels share a single open-drain PG output with 1ms delay and internal 1MΩ pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Channel 1: 2A continuous; Channel 2: 1.7A continuous - supports dual-core SoC or split-rail FPGA I/O + core rails. |
| Switching Frequency | 2.25MHz nominal (1.8–2.7MHz range); synchronizable to 5.4–8MHz - enables ≤1.2µH inductors and compact 1.8cm² total layout area. |
| Quiescent Current | 40µA total in PFM mode - extends battery runtime in always-on subsystems without compromising light-load efficiency. |
| Feedback Reference | 0.6V ±1% over temperature - allows precise low-voltage outputs (e.g., 0.8V, 1.2V) using standard resistor dividers. |
| Protection Features | Peak current limiting (3.2A ch1 / 2.8A ch2), hiccup-mode short-circuit recovery, thermal shutdown (150°C), and negative current detection (−1.6A) - prevents damage during output shorts or reverse-current faults. |
| Input Voltage Range | 2.8V to 5.5V - compatible with single Li+ cell (2.7–4.2V), three NiMH cells, or regulated 5V rail. |
| Power-Good Timing | 1ms delayed PG assertion after both outputs reach 91% of regulation - provides reliable system reset sequencing for processors and FPGAs. |
Pinout & Package
ISL8022IRZ-T7A is housed in a RoHS-compliant, thermally enhanced 4mm × 3mm 12-lead DFN package (L12.4x3) with exposed thermal pad requiring connection to system ground via multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1, FB2 | Channel 1 & 2 feedback inputs | Connect to resistor divider to set output voltage; internal 0.6V reference enables 0.6V–3.3V outputs with ±1% accuracy. |
| EN1, EN2 | Independent channel enable inputs | Active-high logic; controls power sequencing and soft-start initiation per channel; discharges output capacitors when pulled low. |
| PG | Open-drain power-good output | Asserts after 1ms delay when both VOUT1 and VOUT2 reach regulation; internal 1MΩ pull-up eliminates need for external resistor. |
| VIN1, VIN2 | Channel 1 & 2 input supplies | VIN1 powers Channel 1 power stage; VIN2 powers Channel 2 and internal logic - must be ≥ VIN1 for proper biasing. |
| LX1, LX2 | High-side switch node outputs | Drive external inductors; support 100% duty cycle for ultra-low dropout operation; require low-ESR ceramic caps to PGND. |
| PGND1, PGND2 | Separate power ground returns | PGND1 serves Channel 1 power stage; PGND2 serves Channel 2 and system ground - minimizes ground bounce in dual-channel operation. |
| SYNC | Mode selection & sync input | Logic-level configurable: low = forced PWM, high = PFM, falling edge = external sync trigger - enables EMI optimization and multi-regulator coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 180° out-of-phase operation | Reduces input RMS current by ~30% and lowers EMI peak amplitude, easing compliance with CISPR-22 Class B limits in compact layouts. |
| Selectable PFM/PWM mode | PFM delivers >90% efficiency at 10mA load; PWM maintains tight regulation and low noise at full load - selectable per system power-state requirements. |
| Internal soft-start & soft-discharge | 1.3ms controlled ramp-up prevents inrush current; soft-discharge (80–130Ω internal FET) safely collapses output voltage during shutdown without external circuitry. |
| Negative current detection | Trips at −1.6A valley current to halt switching and discharge output - protects against reverse-current faults during hot-swap or load-dump events. |
| Pre-biased output start-up | Enables reliable turn-on even when output capacitor is pre-charged - critical for hot-pluggable modules and redundant power systems. |
Applications
| FPGA Core & I/O Power | Li-ion Powered Portable Instruments |
|---|---|
|
Use Scenario: Dual-rail power for Xilinx Artix-7 FPGA requiring 1.0V core and 1.8V I/O with strict sequencing and low-noise operation. IC Role / Device Role / Timing Role: Primary DC/DC converter providing regulated, phase-controlled outputs with independent enable and PG monitoring. Use Value: 180° phase shift cuts input capacitor RMS current; PFM mode extends battery life during standby; 40µA IQ enables weeks of sleep-mode operation. |
Use Scenario: Compact handheld barcode scanner powered by single-cell Li-ion with dynamic load profiles (scan burst vs idle). IC Role / Device Role / Timing Role: Dual-output POL regulator supplying 3.3V logic and 1.2V sensor interface from 2.8–4.2V battery input. Use Value: 2.25MHz operation allows 1.2µH inductors and <10mm² solution size; soft-discharge prevents brownout during rapid shutdown. |
| DC/DC POL Modules for Networking | Test & Measurement System Rails |
|
Use Scenario: Plug-in 12V-input DC/DC module for enterprise router line cards needing isolated 1.2V and 2.5V rails. IC Role / Device Role / Timing Role: High-efficiency, space-constrained dual buck controller with SYNC input for system-wide clock alignment. Use Value: External sync up to 8MHz enables deterministic EMI placement; 4×3mm DFN fits 10mm × 10mm module footprint with <1.8cm² total area. |
Use Scenario: Precision benchtop multimeter requiring ultra-stable 5.0V analog and 3.3V digital supplies with minimal cross-talk. IC Role / Device Role / Timing Role: Dual-channel regulator with independent feedback and PG per rail, supporting differential voltage monitoring. Use Value: 0.6V reference and ±1% output accuracy ensure calibration-grade stability; 180° phase reduces shared input ripple coupling. |
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 |
|---|---|---|---|
| TPS65270RGET | Higher 3A/2A output capability; fixed 1.2MHz frequency; no PFM mode; requires external compensation. | Better suited for higher-current industrial PLC I/O modules; lacks light-load efficiency optimization for battery use. | Choose TPS65270RGET when >2A per channel is required and fixed-frequency EMI control suffices. |
| MP2491DS-LF-Z | Single-channel 2A buck; 2.2MHz operation; 30µA IQ; no dual-phase or PG output; smaller 3×3mm QFN. | Requires two ICs for dual-rail designs; increases BOM count and layout area; no inter-channel timing coordination. | Choose MP2491DS-LF-Z only for cost-sensitive, space-constrained single-rail applications where dual-channel integration is unnecessary. |
Compared with TPS65270RGET and MP2491DS-LF-Z, the ISL8022IRZ-T7A uniquely combines dual-channel 180° phase control, sub-50µA PFM quiescent current, integrated PG, and soft-discharge in a 4×3mm DFN - making it optimal for battery-powered, space-limited, and EMI-sensitive dual-rail systems.
Availability
ISL8022IRZ-T7A is available at Aetrix Electronics and suitable for FPGA power delivery, Li-ion portable instrumentation, and DC/DC POL modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8022IRZ-T7A 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 is a global semiconductor leader delivering microcontrollers, analog power, and connectivity solutions for automotive, industrial, and IoT markets.
The ISL8022IRZ-T7A belongs to Renesas' high-efficiency DC/DC regulator product line, designed specifically for space-constrained, battery-sensitive applications requiring dual independent outputs with advanced power management features.
FAQ
What is the maximum output voltage supported by the ISL8022IRZ-T7A?
The ISL8022IRZ-T7A does not impose an upper limit on output voltage beyond the input supply constraint. Its 0.6V internal reference and external resistor divider allow setting outputs up to just below VIN (e.g., 3.3V with 5.5V input). The datasheet confirms stable operation at 3.3VOUT1 and 3.3VOUT2 in test configurations, with line regulation specified at 0.2%/V - confirming robustness across common logic rail voltages.
Does the ISL8022IRZ-T7A support independent voltage sequencing between its two channels?
Yes, the ISL8022IRZ-T7A supports fully independent sequencing via separate EN1 and EN2 pins. Each channel initiates soft-start only when its respective enable signal transitions high, allowing staggered turn-on (e.g., VOUT2 before VOUT1) or selective shutdown. The shared PG output reflects only active channels, enabling flexible system-level power sequencing without external logic.
Can the ISL8022IRZ-T7A operate with a pre-biased output capacitor?
Yes, the ISL8022IRZ-T7A explicitly supports start-up with pre-biased outputs, as confirmed in the "Features" section and "Theory of Operation". This capability prevents reverse current flow and ensures reliable turn-on in hot-swap, redundant, or multi-source power systems where output capacitors may retain residual charge prior to IC activation.
What is the purpose of the exposed thermal pad on the ISL8022IRZ-T7A package?
The exposed pad on the ISL8022IRZ-T7A's 4×3mm DFN package must be soldered to the PCB's system ground plane using multiple thermal vias. It serves two critical functions: (1) electrical - providing the lowest-impedance return path for high-frequency switching currents, and (2) thermal - reducing θJA from 41°C/W to near 3°C/W (θJC), enabling sustained 2A operation at +85°C ambient without derating.
How does the ISL8022IRZ-T7A handle output short-circuit conditions?
The ISL8022IRZ-T7A employs hiccup-mode protection for output shorts: upon detecting 17 consecutive overcurrent events, it shuts down for four soft-start periods (~5.2ms total), then attempts automatic restart. During short-circuit, negative current detection activates at −1.6A, forcing tri-state mode and soft-discharge to safely collapse the output voltage before recovery - preventing MOSFET thermal runaway.
ISL8022IRZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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-T7A FAQ
1.How can I place an order for ISL8022IRZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8022IRZ-T7A 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-T7A reliable?
The price and inventory of ISL8022IRZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8022IRZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8022IRZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8022IRZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8022IRZ-T7A?
ISL8022IRZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8022IRZ-T7A 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-T7A?
For technical support, including ISL8022IRZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8022IRZ-T7A requirements.
6.How does Aetrix verify that ISL8022IRZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8022IRZ-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL8022IRZ-T7A?
All ISL8022IRZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8022IRZ-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL8022IRZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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