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Renesas ISL8024IRTAJZ
- Part No.:
- ISL8024IRTAJZ
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8024IRTAJZ.pdf
- Description:
- IC REG BUCK ADJ 4A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,486
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Product details
Overview
ISL8024IRTAJZ from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 4A continuous output current from a 2.7V–5.5V input, featuring integrated 45mΩ P-Channel and 19mΩ N-Channel MOSFETs, 1MHz default switching frequency, and 0.6V ±0.5% reference voltage. It serves as a high-efficiency point-of-load (POL) power supply for FPGA, microcontroller, and DSP core rails in space-constrained portable and embedded systems.
For engineers reviewing the ISL8024IRTAJZ datasheet, ISL8024IRTAJZ pinout, ISL8024IRTAJZ application, or ISL8024IRTAJZ equivalent, key selection criteria include its adjustable output capability, 100% duty-cycle operation enabling <200mV dropout at 4A, hiccup-mode overcurrent protection, and compatibility with compact 3×3mm QFN layouts requiring minimal external components.
Technical Context
The ISL8024IRTAJZ employs current-mode PWM control with slope compensation (440mV/Ts) and a transconductance error amplifier (80µA/V internal, 150µA/V with external FS resistor), enabling fast transient response and stable loop behavior across 500kHz–4MHz switching frequencies. Its dual-mode operation-PWM (forced continuous) or PFM (discontinuous)-is selected via the SYNC pin, directly impacting light-load efficiency and EMI profile.
Internal protection includes hiccup-mode overcurrent limiting (5.2–7.8A peak), negative current detection (−1.8 to −3.0A), thermal shutdown at +150°C (25°C hysteresis), and output voltage monitoring via PG with 1ms delay and ±15% window. The device supports pre-biased start-up and soft-stop discharge through a 100Ω internal switch during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - enables single-chip core rail supply for mid-range FPGAs and application processors without external current sharing. |
| Input Voltage Range | 2.7V to 5.5V - supports Li-ion battery (3.0–4.2V), USB-powered (5V), and intermediate bus architectures. |
| Reference Voltage | 0.600V ±0.5% - ensures ≤±6mV output regulation error across temperature, line, and load for precision core supplies. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - allows optimization of inductor size (e.g., 1µH at 1MHz) vs. efficiency vs. EMI. |
| Efficiency | Up to 95% at 1.8V/4A - achieved via low RDS(on) FETs (45mΩ HS / 19mΩ LS) and synchronous rectification. |
| Duty Cycle | 100% - maintains regulation down to VIN – (IOUT × 45mΩ); enables <200mV dropout at full 4A load. |
| Quiescent Current | 50µA (no load, PFM mode) - extends battery runtime in always-on subsystems and low-power standby states. |
Pinout & Package
ISL8024IRTAJZ is housed in a 16-lead 3×3mm Pb-free TQFN package with exposed thermal pad (L16.3x3D), optimized for low θJA = 45°C/W and minimal PCB area (<0.22 in²).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires two 22µF ceramic capacitors to PGND for stability and ripple suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt; must be routed with minimal loop area to reduce EMI. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switch return; separate from SGND to avoid noise coupling into feedback. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, SS, EN, FS, SYNC, PG; must be tied to exposed pad and isolated from PGND plane except at single point. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; internal 0.6V reference sets VOUT = 0.6V × (1 + R2/R3); supports adjustable outputs from 0.6V to near VIN. |
| COMP (Pin 9) | Error amplifier output | Provides loop compensation node; connected to SGND in internal-compensation mode (FS = VIN); used for external pole-zero placement when FS resistor is applied. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown on floating; initiates soft-start and PG assertion on rising edge. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after regulation; pulled low during UVLO, OCP, OTP, or soft-start; requires external 10k–100kΩ pull-up to VIN. |
| SS (Pin 7) | Soft-start timing | Internal 1ms ramp when tied to SGND; capacitor to SGND scales ramp time (TSS ≈ CSS × 1.6µA); max 33nF recommended. |
| FS (Pin 6) | Frequency set | Resistor to SGND programs fSW = 220kΩ / RFS (kHz); default 1MHz when tied to VIN; enables internal compensation. |
| SYNC (Pin 4) | Mode selection/synchronization | Logic high = PWM mode; logic low = PFM mode; external clock input (positive-edge triggered) up to 4MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 45mΩ P-Channel HS + 19mΩ N-Channel LS MOSFETs - eliminates external switches and reduces BOM count to ≤3 external components (inductor, input/output caps, feedback resistors). |
| 100% Duty-Cycle Operation | Enables ultra-low dropout: <200mV at 4A - critical for extending runtime in battery-powered systems nearing end-of-discharge. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter triggers shutdown and auto-restart after eight soft-start periods - prevents thermal runaway during sustained short-circuit conditions. |
| Pre-Biased Output Start-Up | Supports start-up into pre-charged output (e.g., hot-swap, backup rail) without reverse current flow - avoids system brownout during power sequencing. |
| Soft-Stop Output Discharge | Internal 100Ω switch actively discharges output capacitor during shutdown - ensures clean power-down and prevents unintended wake-up in multi-rail systems. |
Applications
| DC/DC POL Modules | μC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC modules for telecom line cards and industrial I/O controllers requiring regulated 1.2V/1.8V/3.3V rails. IC Role / Device Role / Timing Role: Primary synchronous buck controller providing tightly regulated, high-current core voltage with minimal footprint. Use Value: Enables full converter design in <0.22 in² using only one inductor and two 22µF ceramics - reduces module height to ≤1mm. |
Use Scenario: Core voltage supply for Xilinx Artix-7 FPGAs or ARM Cortex-A53 SoCs operating at 1.2V/1.8V with dynamic load steps up to 3A/µs. IC Role / Device Role / Timing Role: High-transient-response POL regulator with current-mode control and 1MHz switching to maintain <±2% output deviation. Use Value: Delivers 4A continuous + 6.5A peak current with <15µs PG fault response - meets FPGA core rail sequencing and reliability requirements. |
| Portable Instruments | Li-ion Battery Powered Devices |
Use Scenario: Handheld test equipment (e.g., digital multimeters, oscilloscope probes) powered by single-cell Li-ion with strict quiescent current limits. IC Role / Device Role / Timing Role: Main system supply regulator supporting both active measurement and deep-sleep modes. Use Value: 50µA quiescent current in PFM mode extends battery life >200 hours in standby; 95% efficiency at 1.8V/2A minimizes heat in sealed enclosures. |
Use Scenario: Wearables and Bluetooth headsets requiring efficient step-down from 3.6V nominal Li-ion to 1.2V sensor/1.8V radio rails. IC Role / Device Role / Timing Role: Adjustable-output buck converter supporting multiple voltage domains from one battery source. Use Value: 100% duty-cycle operation sustains regulation down to 3.0V battery voltage - maximizes usable battery capacity before shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B20RMLR | 4A, 4.5–18V input, 500kHz–2MHz adjustable fSW, 0.6V reference, but larger 4×4mm QFN package and higher minimum input voltage. | Targeted at higher-input industrial rails; not suitable for direct 2.7V–3.6V Li-ion operation. | Select when input exceeds 4.5V and board space permits larger package; avoid for single-cell battery systems. |
| MP2315GJ-Z | 4A, 4.5–28V input, fixed 500kHz fSW, no PFM mode, no pre-bias start-up, 0.8V reference, smaller 2×2mm QFN. | Lacks light-load efficiency optimization and battery-friendly low-VIN support; suited for fixed 5V/12V intermediate buses. | Choose for cost-sensitive, non-battery applications where 4.5V+ input and simplicity outweigh efficiency flexibility. |
Compared with TPS544B20RMLR and MP2315GJ-Z, ISL8024IRTAJZ uniquely supports 2.7V input, PFM/PWM mode selection, pre-biased start-up, and 100% duty cycle - making it optimal for compact, battery-powered designs demanding wide VIN range and ultra-low quiescent current.
Availability
ISL8024IRTAJZ 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 assurance, and RoHS-compliant packaging.
Supply support for ISL8024IRTAJZ 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 Corporation acquired Intersil in 2017 and continues to develop and support its high-performance analog and power management portfolio.
The ISL8024IRTAJZ belongs to Renesas' ISL802x family of compact synchronous buck regulators, designed specifically for space-constrained, high-efficiency point-of-load applications in portable, industrial, and communications equipment.
FAQ
What is the maximum continuous output current of the ISL8024IRTAJZ?
The ISL8024IRTAJZ delivers up to 4A of continuous output current under recommended operating conditions (TA = –40°C to +85°C, VIN = 3.6V). Peak current capability reaches 5.2–7.8A depending on thermal conditions and layout, as defined by its hiccup-mode overcurrent protection threshold. Derating is required above +85°C ambient per the θJA = 45°C/W thermal resistance specification.
Does the ISL8024IRTAJZ support adjustable output voltage?
Yes, the ISL8024IRTAJZ supports fully adjustable output voltage via an external resistor divider connected to the FB pin. With its precise 0.600V ±0.5% internal reference, output voltages from 0.6V up to near the input rail (accounting for dropout) can be set - for example, 1.2V (R2 = 100kΩ, R3 = 100kΩ) or 1.8V (R2 = 200kΩ, R3 = 100kΩ) as shown in the typical application diagram.
How does the ISL8024IRTAJZ handle startup into a pre-biased output?
The ISL8024IRTAJZ supports pre-biased output start-up by operating in SKIP mode during soft-start and disabling reverse current flow through its internal MOSFETs. This prevents the output capacitor from discharging back into the IC when powered on while the output rail is already charged - a critical feature for hot-swap and multi-rail sequencing applications where ISL8024IRTAJZ may be enabled after other supplies.
What protection features are integrated into the ISL8024IRTAJZ?
The ISL8024IRTAJZ integrates overcurrent (hiccup-mode, 17-cycle fault counter), overtemperature (+150°C shutdown with +125°C restart), overvoltage (PG-driven), undervoltage lockout (2.5V rising threshold), negative current detection (–1.8 to –3.0A), and soft-stop output discharge. All protections are fully internal - no external components required - and PG asserts low within 15µs of fault detection.
Can the switching frequency of the ISL8024IRTAJZ be synchronized to an external clock?
Yes, the ISL8024IRTAJZ supports external synchronization via the SYNC pin, accepting positive-edge-triggered clock signals up to 4MHz. When SYNC is driven externally, the internal oscillator is disabled and switching aligns precisely to the external clock edge - essential for reducing beat frequencies and EMI in multi-regulator systems where ISL8024IRTAJZ powers noise-sensitive analog or RF circuitry.
ISL8024IRTAJZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 4A
- Frequency - Switching:
- 490kHz ~ 4.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (3x3)
ISL8024IRTAJZ FAQ
1.How can I place an order for ISL8024IRTAJZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8024IRTAJZ 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 ISL8024IRTAJZ reliable?
The price and inventory of ISL8024IRTAJZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8024IRTAJZ is usually 5 days.
3.What payment methods are accepted for ISL8024IRTAJZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8024IRTAJZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8024IRTAJZ?
ISL8024IRTAJZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8024IRTAJZ 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 ISL8024IRTAJZ?
For technical support, including ISL8024IRTAJZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8024IRTAJZ requirements.
6.How does Aetrix verify that ISL8024IRTAJZ is sourced from the original manufacturer or authorized distributors?
All ISL8024IRTAJZ 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 ISL8024IRTAJZ meets industry standards.
7.What is the process for return or replacement of ISL8024IRTAJZ?
All ISL8024IRTAJZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8024IRTAJZ, 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 ISL8024IRTAJZ part is unused and in its original packaging.
Return procedure for ISL8024IRTAJZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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