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Renesas ISL8033IRZ-T
- Part No.:
- ISL8033IRZ-T
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8033IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,637
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Product details
Overview
ISL8033IRZ-T from Renesas Electronics (formerly Intersil) is a dual-channel synchronous buck regulator IC delivering up to 3A per channel at 1MHz fixed switching frequency, optimized for low-voltage POL applications with input range 2.85V–6V, 0.8V–3.3V programmable output, and integrated P/N-MOSFETs with ≤75mΩ ON-resistance. It powers microcontrollers, FPGAs, and DSPs in battery-powered systems such as Li-ion devices and barcode readers.
For engineers reviewing the ISL8033IRZ-T datasheet, ISL8033IRZ-T pinout, ISL8033IRZ-T application, or ISL8033IRZ-T equivalent, this page delivers verified technical context, confirmed pin functions, real-world efficiency curves (up to 95% at 3A), validated alternatives, and design-critical features including 180° out-of-phase operation, independent soft-start, and 100% duty-cycle dropout control.
Technical Context
The ISL8033IRZ-T implements current-mode PWM control with internal slope compensation and transconductance error amplifiers (20µA/V gain, 0.2Ω trans-resistance), enabling fast transient response and pulse-by-pulse current limiting. Each channel integrates matched P- and N-channel MOSFETs with typical 50mΩ ON-resistance at VIN = 6V.
It supports independent enable (EN1/EN2), power-good (PG1/PG2) with 1ms delay, and ISET-configurable peak current limits (2.7A–5.5A). Channels operate 180° out-of-phase to reduce input RMS current and EMI, and feature thermal shutdown at 150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A per channel, guaranteed minimum under VDD-connected ISET and 2.85V–6V input. |
| Switching Frequency | Fixed 1MHz (ISL8033 variant); enables compact 1.5µH inductors and stable 2×22µF ceramic output capacitors. |
| Input Voltage Range | 2.85V to 6V DC - supports single Li+ cell, three NiMH cells, or regulated 5V rails without external LDO pre-regulation. |
| Output Voltage Range | 0.8V to 3.3V, set via external resistor divider; 2% accuracy over line/load/temperature ensures tight regulation for core logic supplies. |
| Efficiency | Up to 95% at 3A (VIN=5V, VOUT=1.8V); high efficiency reduces thermal load in space-constrained PCB layouts. |
| Quiescent Current | 15–40mA typical in active mode; 8µA shutdown current extends battery life in always-on portable systems. |
| Thermal Resistance | θJA = 36°C/W (4×4 QFN); exposed pad tied to PGND enables robust thermal dissipation in high-current operation. |
Pinout & Package
ISL8033IRZ-T is housed in a 24-lead 4mm × 4mm QFN package (L24.4x4D) with 1mm max height and thermally enhanced exposed pad (PD) requiring connection to PGND via multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX1, LX2 | Switch node (Channel 1 & 2) | Connects to inductor high-side terminal; carries high di/dt switching current - requires short, low-inductance layout. |
| PGND1, PGND2 | Power ground (Channel 1 & 2) | Separate return paths for each channel's power stage minimize ground bounce and improve PSRR. |
| FB1, FB2 | Feedback input (Channel 1 & 2) | High-impedance (0.1µA bias) node sensing output voltage; sets regulation point via resistor divider to 0.8V reference. |
| EN1, EN2 | Enable input (Channel 1 & 2) | Logic-controlled start/stop with soft-discharge during shutdown; must not float - tie to SGND or VDD via pull-up/down. |
| PG1, PG2 | Power-good open-drain output | 1ms-delayed active-low signal confirms output is within ±8% of target; used for sequencing and system reset coordination. |
| ISET | Current limit configuration | Selects peak overload current (2.7A/4.8A/5.5A) by connecting to GND/VDD/floating - critical for short-circuit protection tuning. |
| VIN1, VIN2, VDD | Input supply pins | VIN1/VIN2 accept 2.85–6V; VDD powers internal logic - decouple each with ≥22µF ceramic capacitor near respective pins. |
| SYNC | External synchronization input | Negative-edge-triggered; accepts up to 6MHz clock to force PWM mode and synchronize both channels - not used in ISL8033IRZ-T default operation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 3A synchronous buck regulation | Integrated P/N-MOSFETs eliminate external switches; 100% duty cycle enables <250mV dropout at 3A for extended battery runtime. |
| 180° out-of-phase operation | Reduces input ripple current by ~70% versus in-phase dual converters - lowers required input capacitance and EMI filter size. |
| Independent digital soft-start (1.5ms) | Prevents inrush current and output overshoot during power-up; ramp rate is fixed and unadjustable - simplifies design validation. |
| Hiccup-mode overcurrent protection | Trips on 17 consecutive current-limit events; enters 4-cycle restart delay before retry - protects against sustained shorts without thermal runaway. |
| Soft-stop output discharge | Internal 100Ω switch discharges output capacitors when disabled - prevents back-powering of downstream circuitry during sequencing. |
| Pre-biased output startup | Starts safely even if output voltage is non-zero at enable - essential for hot-swap and multi-rail power systems. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in compact embedded modules where board area and thermal density are constrained. IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller providing isolated 1.2V/1.8V rails from 5V or Li+ input. Use Value: 4×4mm QFN footprint and 5.46cm² total solution area enable high-density module designs without external MOSFETs. |
Use Scenario: Core and I/O voltage regulation for ARM-based microcontrollers and Xilinx/Altera FPGAs in portable test equipment. IC Role / Device Role / Timing Role: Primary power controller delivering tightly regulated, low-noise 0.8V–1.5V core supplies with fast transient response. Use Value: 2% output accuracy and 180° phase shift ensure stable operation under dynamic load steps common in processor burst modes. |
| Li-ion Battery Power Devices | Bar Code Readers |
Use Scenario: Single-cell Li+ powered handheld scanners requiring >8-hour runtime and cold-temperature operation down to -40°C. IC Role / Device Role / Timing Role: Main DC/DC converter stepping 2.85–4.2V battery voltage to 3.3V and 1.8V system rails. Use Value: 8µA shutdown current and 100% duty-cycle operation maximize usable battery capacity across full discharge curve. |
Use Scenario: Compact, low-cost barcode reader with integrated imager, laser, and Bluetooth radio sharing limited PCB real estate. IC Role / Device Role / Timing Role: Dual-output regulator powering imager sensor (1.8V) and MCU/radio (3.3V) from shared Li+ source. Use Value: Independent EN/PG pins allow precise power sequencing between imaging subsystem and wireless interface during wake/sleep cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8033AIRZ-T | 2.5MHz fixed switching frequency vs. 1MHz; requires smaller 0.47–1.5µH inductors and same 2×22µF output caps. | Better suited for ultra-compact designs where PCB area is more critical than light-load efficiency. | Select ISL8033AIRZ-T when minimizing inductor size and EMI filtering components is prioritized over lowest quiescent current. |
| TPS65270RGET | 3A/2A dual buck with integrated LDO; 2.2MHz sync capability; higher 3.5V–18V input range; no ISET current limit adjustment. | Targets industrial 12V rail systems rather than low-voltage battery inputs; adds linear regulation flexibility. | Choose TPS65270RGET only when operating from >6V sources or requiring mixed buck/LDO outputs - not drop-in compatible. |
Compared with ISL8033IRZ-T, ISL8033AIRZ-T trades lower light-load efficiency for smaller passive components, while TPS65270RGET shifts application scope to higher-input industrial systems with added LDO integration but no ISET configurability.
Availability
ISL8033IRZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8033IRZ-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 product support, documentation, and manufacturing continuity for the ISL8033 family.
The ISL8033 series was designed specifically for high-efficiency, low-voltage dual-rail power in portable and battery-operated systems - emphasizing minimal external components, thermal robustness, and seamless integration with microprocessor and FPGA power requirements.
FAQ
What is the maximum output current per channel for ISL8033IRZ-T?
The ISL8033IRZ-T guarantees 3A per channel when the ISET pin is connected to VDD and operating within its specified input voltage range (2.85V–6V) and ambient temperature (-40°C to +85°C). Peak current capability reaches 4.8A under typical conditions, supporting transient loads without dropout.
Does ISL8033IRZ-T support external synchronization?
Yes, ISL8033IRZ-T supports external synchronization up to 6MHz via the SYNC pin, using negative-edge triggering to align switching cycles. This feature allows phase control and EMI reduction in multi-converter systems, though it operates at fixed 1MHz internally when SYNC is left unconnected or tied high.
How does the ISET pin affect current limiting on ISL8033IRZ-T?
The ISET pin configures the peak overcurrent threshold: grounded ISET sets 2.7A, floating sets 4.8A, and VDD-connected ISET sets 5.5A per channel. This direct hardware control enables precise short-circuit protection tuning without firmware or external components - a key differentiator of the ISL8033IRZ-T.
What package type and thermal characteristics does ISL8033IRZ-T use?
ISL8033IRZ-T uses a 24-lead 4mm × 4mm QFN package (L24.4x4D) with exposed thermal pad (PD). Its θJA is 36°C/W and θJC is 2°C/W, requiring the PD pad to be soldered to PGND with multiple thermal vias for optimal heat transfer - critical for sustaining 3A/channel continuous operation.
Can ISL8033IRZ-T operate with a pre-biased output voltage?
Yes, ISL8033IRZ-T supports startup into a pre-biased output, meaning it can safely begin regulation even when the output capacitor already holds voltage. This eliminates risk of reverse current flow and ensures reliable power sequencing in complex multi-rail systems where rails may power up asynchronously.
ISL8033IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN 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):
- 2.85V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL8033IRZ-T FAQ
1.How can I place an order for ISL8033IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8033IRZ-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 ISL8033IRZ-T reliable?
The price and inventory of ISL8033IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8033IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8033IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8033IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8033IRZ-T?
ISL8033IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8033IRZ-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 ISL8033IRZ-T?
For technical support, including ISL8033IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8033IRZ-T requirements.
6.How does Aetrix verify that ISL8033IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8033IRZ-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 ISL8033IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8033IRZ-T?
All ISL8033IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8033IRZ-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 ISL8033IRZ-T part is unused and in its original packaging.
Return procedure for ISL8033IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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