My Inquiry
My Account
Renesas ISL8033AIRZ
- Part No.:
- ISL8033AIRZ
- Manufacturer:
- Renesas
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8033AIRZ.pdf
- Description:
- IC REG BUCK ADJ 3A DL 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL8033AIRZ from Renesas Electronics is a dual-channel synchronous buck regulator IC with 3A per channel, 2.5MHz fixed switching frequency, 0.8V to 3.3V adjustable output voltage range, ±2% output accuracy over temperature/load/line, and integrated high-side P-MOSFET (75mΩ max) and low-side N-MOSFET (75mΩ max). It powers microcontrollers, FPGAs, and DSPs in space-constrained Li-ion battery devices.
For engineers reviewing the ISL8033AIRZ datasheet, ISL8033AIRZ pinout, ISL8033AIRZ application, or ISL8033AIRZ equivalent, key selection criteria include its 2.5MHz operation enabling compact 0.47–1.5µH inductors, independent enable/PG pins per channel, 180° out-of-phase interleaving for EMI reduction, and ISET-programmable current limit (2.7–5.5A).
Technical Context
The ISL8033AIRZ implements current-mode PWM control with internal slope compensation and transconductance error amplifiers (20µA/V gain), delivering fast transient response and pulse-by-pulse current limiting. Its dual channels operate at precisely 180° phase offset to minimize input RMS current and conducted EMI.
It features independent digital soft-start (1.5ms), controllable soft-stop discharge (100Ω internal switch), startup with pre-biased outputs, and hiccup-mode short-circuit protection triggered after 17 consecutive overcurrent faults. Thermal shutdown activates at 150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 2.5MHz fixed - enables use of sub-1µH inductors and reduces PCB area by >40% vs 1MHz alternatives. |
| Output Current per Channel | 3A guaranteed minimum - supports high-current core rails for modern µC/FPGA without external boost. |
| Input Voltage Range | 2.85V to 6V - compatible with single Li⁺ cell (3.0–4.2V), three NiMH cells (~3.6V), or regulated 5V supply. |
| Feedback Reference Voltage | 0.800V ±10mV - sets precise output regulation point; enables 0.8V–3.3V programmable VOUT via resistor divider. |
| Quiescent Supply Current | 30–70mA typical at no load - optimized for low-power battery operation while maintaining full regulation capability. |
| Shutdown Current | 8–20µA - ensures minimal battery drain during system sleep or standby modes. |
| Efficiency | Up to 95% at 3A - achieved via integrated 75mΩ P/N-MOSFETs and synchronous rectification, reducing thermal load. |
Pinout & Package
ISL8033AIRZ is housed in a thermally enhanced 24-lead 4mm × 4mm QFN package (1mm max height) with exposed thermal pad (PD) requiring connection to PGND for optimal electrical and thermal performance.
| 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 tight layout and low-inductance routing. |
| PGND1, PGND2, PGND | Power ground (per channel + common) | Separate power return paths minimize noise coupling between channels; must be tied to thermal pad (PD) and system PGND. |
| FB1, FB2 | Feedback input (Channel 1 & 2) | Inverting input to error amplifier; sets output voltage via resistor divider; monitors regulation and triggers PG assertion. |
| EN1, EN2 | Enable input (Channel 1 & 2) | Logic-controlled start/stop; pulls output capacitor to PGND during shutdown - enables precise power sequencing. |
| PG1, PG2 | Power-good open-drain output (Channel 1 & 2) | 1ms delayed assertion after VOUT reaches 92% of target - provides reliable system reset and rail monitoring. |
| ISET | Current limit programming | Sets peak overload current (2.7–5.5A) by connecting to VDD, GND, or floating - enables design flexibility across load profiles. |
| VIN1, VIN2, VDD | Input supply / logic rail | VIN1/VIN2 power MOSFET stages; VDD supplies internal logic - each requires local 22µF ceramic decoupling to PGND. |
| SYNC | External synchronization input | Accepts up to 6MHz external clock (ISL8033 only); ISL8033AIRZ ignores SYNC - pin must be tied to VIN or left floating per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| 180° interleaved dual-channel operation | Reduces input ripple current by ~70%, cuts required input capacitance, and lowers EMI emissions without external components. |
| 100% duty-cycle capability | Enables ultra-low dropout (<250mV at 3A) during battery brownout, extending usable runtime in portable applications. |
| Independent soft-start and soft-discharge | Prevents inrush current at startup and controlled output collapse at shutdown - eliminates bus droop and cross-regulation issues. |
| Negative current protection | Detects reverse current down to –2.5A and enters tri-state mode with active discharge - protects against back-driving and load dumps. |
| Internal current-mode compensation | Eliminates need for external compensation network; stabilizes loop across full load/line/temp range using embedded 27pF/390kΩ RC. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in compact industrial controllers where board space is constrained and thermal management is critical. IC Role / Device Role / Timing Role: Dual independent buck controller delivering tightly regulated 1.2V and 1.8V rails from a shared 5V input. Use Value: 2.5MHz operation allows 0.68µH/1µH inductors and 44µF total output capacitance, reducing solution size by >35% vs 1MHz alternatives. |
Use Scenario: Powering multi-core ARM processors and Xilinx Artix-7 FPGAs in handheld test equipment with Li-ion battery input. IC Role / Device Role / Timing Role: Primary core voltage regulator providing [email protected] (CPU) and [email protected] (I/O) with independent sequencing and PG monitoring. Use Value: ±2% output accuracy and 1.5ms soft-start ensure reliable boot under varying battery voltage (3.0–4.2V) and temperature (–40°C to +85°C). |
| Plug-in DC/DC Modules for Routers and Switchers | Li-ion Battery Power Devices |
Use Scenario: Hot-pluggable 12V-to-1.2V/1.8V converter modules in enterprise networking hardware requiring high reliability and EMI compliance. IC Role / Device Role / Timing Role: Dual-channel regulator with 180° phase shift minimizing input ripple and meeting CISPR-22 Class B conducted EMI limits. Use Value: Interleaved architecture reduces peak input current harmonics, allowing smaller input filter capacitors and lower-cost magnetics. |
Use Scenario: Power management in barcode scanners and portable medical sensors operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: High-efficiency buck converter supporting 0.8V–3.3V outputs, 100% duty cycle for deep battery discharge, and <20µA shutdown current. Use Value: Extends battery life by >25% vs discrete solutions through 95% peak efficiency and ultra-low quiescent current in active and standby states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8033IRZ | 1MHz fixed switching frequency; supports external SYNC up to 6MHz; uses larger inductors (1.0–3.3µH) and higher output capacitance. | Better suited for thermally relaxed designs where EMI filtering priority outweighs board area constraints. | Select ISL8033IRZ when 1MHz operation simplifies EMI filter design or when external clock synchronization is required. |
| TPS65270RGET | Dual 3A/2A outputs; 2.2MHz switching; integrated LDOs; different pinout and enable logic; no ISET current programming. | Targets systems needing mixed analog/digital rails (e.g., ADC reference + core logic) with tighter integration. | Choose TPS65270RGET only if LDO integration and asymmetric current capability (3A/2A) match system requirements - not pin-compatible. |
Compared with ISL8033IRZ, ISL8033AIRZ delivers 2.5× higher switching frequency for smaller passives and lower EMI, but forfeits SYNC capability; versus TPS65270RGET, it offers symmetric 3A/3A outputs and ISET flexibility at the cost of integrated LDOs and different sequencing behavior.
Availability
ISL8033AIRZ 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 ISL8033AIRZ 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 specializing in microcontrollers, analog power management, and timing solutions for automotive, industrial, and computing markets.
The ISL8033AIRZ belongs to Renesas' high-efficiency DC/DC regulator product line, designed specifically for space- and power-constrained portable and embedded systems requiring dual independent low-voltage rails.
FAQ
What is the maximum output voltage supported by the ISL8033AIRZ?
The ISL8033AIRZ supports an adjustable output voltage range from 0.8V to 3.3V, set via external resistor dividers on FB1 and FB2 pins. The internal 0.800V ±10mV reference and ±2% regulation accuracy over temperature/load/line ensure stable operation across this full range. Output voltages above 3.3V are not supported due to internal error amplifier and protection circuit limitations.
Does the ISL8033AIRZ support external clock synchronization?
No, the ISL8033AIRZ does not support external clock synchronization. Its switching frequency is fixed at 2.5MHz. The SYNC pin is not functional in this variant and must be tied to VIN or left floating per the datasheet. Only the ISL8033 (non-A) version supports external synchronization up to 6MHz.
How does the ISET pin affect current limiting on the ISL8033AIRZ?
The ISET pin on the ISL8033AIRZ configures the peak overcurrent limit per channel: connecting ISET to VDD sets 4.1–5.5A, to GND sets 2.7–3.9A, and leaving it floating also sets 2.7–3.9A. This allows designers to optimize fault protection for specific load profiles without changing external components.
What thermal performance can be expected from the ISL8033AIRZ in a 4-layer PCB design?
In a standard 4-layer PCB with 2oz copper, thermal vias under the exposed pad (PD), and 1in² of 2oz copper pour connected to PGND, the ISL8033AIRZ achieves θJA ≈ 36°C/W. At 3A per channel and 5V input, junction temperature rise is typically <45°C above ambient - well within the –40°C to +125°C operating range.
Can the ISL8033AIRZ safely power a pre-biased output during startup?
Yes, the ISL8033AIRZ supports startup with pre-biased outputs. Its control architecture prevents reverse current flow during initial ramp-up, avoiding output voltage overshoot or damage to downstream circuitry. This feature is confirmed in the datasheet's "Start-up with pre-biased output" specification and validated in Figure 20–21 waveforms.
ISL8033AIRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN 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):
- 2.85V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 3A
- Frequency - Switching:
- 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL8033AIRZ FAQ
1.How can I place an order for ISL8033AIRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8033AIRZ 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 ISL8033AIRZ reliable?
The price and inventory of ISL8033AIRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8033AIRZ is usually 5 days.
3.What payment methods are accepted for ISL8033AIRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8033AIRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8033AIRZ?
ISL8033AIRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8033AIRZ 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 ISL8033AIRZ?
For technical support, including ISL8033AIRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8033AIRZ requirements.
6.How does Aetrix verify that ISL8033AIRZ is sourced from the original manufacturer or authorized distributors?
All ISL8033AIRZ 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 ISL8033AIRZ meets industry standards.
7.What is the process for return or replacement of ISL8033AIRZ?
All ISL8033AIRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8033AIRZ, 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 ISL8033AIRZ part is unused and in its original packaging.
Return procedure for ISL8033AIRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL8033AIRZ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
