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Renesas ISL8024IRTAJZ-T7
- Part No.:
- ISL8024IRTAJZ-T7
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8024IRTAJZ-T7.pdf
- Description:
- IC REG BUCK ADJ 4A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,606
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Product details
Overview
ISL8024IRTAJZ-T7 from Renesas Electronics (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 reference voltage with ±0.8% accuracy over temperature/load/line. It serves as a high-efficiency point-of-load (POL) power supply for microcontrollers, FPGAs, and battery-powered portable instruments.
For engineers reviewing the ISL8024IRTAJZ-T7 datasheet, ISL8024IRTAJZ-T7 pinout, ISL8024IRTAJZ-T7 application, or ISL8024IRTAJZ-T7 equivalent, key selection criteria include its 100% duty-cycle capability (<200mV dropout at 4A), hiccup-mode overcurrent protection, soft-stop output discharge, and adjustable 500kHz–4MHz switching frequency via external resistor on FS pin.
Technical Context
The ISL8024IRTAJZ-T7 employs current-mode PWM control with slope compensation (440mV/Ts) and fast transient response, using an internal transconductance error amplifier (80µA/V typical) with clamped 1.6V output. Its dual-mode operation-PWM (SYNC = HI) for low-noise regulation or PFM/SKIP (SYNC = LO) for light-load efficiency-enables optimized performance across load ranges from 0A to 4A.
It integrates comprehensive fault protection: overtemperature shutdown (150°C trip, 25°C hysteresis), overvoltage (0.8V PG threshold), undervoltage (80–90% of VOUT), negative current limiting (−2.4A), and cycle-by-cycle current limiting with 17-cycle hiccup recovery. The 1ms power-good delay and pre-biased start-up support robust system sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 4A continuous - supports high-current digital loads like FPGAs without external MOSFETs or heatsinks. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and industrial 3.3V rails. |
| Reference Voltage | 0.600V ±0.8% - enables precise output setting down to 0.8V via external resistor divider with minimal drift. |
| Switching Frequency | Adjustable 500kHz–4MHz (default 1MHz) - allows trade-off between inductor size (higher fSW → smaller L) and efficiency (lower fSW → less switching loss). |
| Efficiency | Up to 95% - achieved via ultra-low RDS(on) FETs (45mΩ HS / 19mΩ LS) and synchronous rectification. |
| Duty Cycle | 100% - maintains regulation under ultra-low input conditions (e.g., Li-ion discharge to 2.8V) with <200mV dropout at 4A. |
| Quiescent Current | 50µA (no load, PFM mode) - extends battery life in always-on portable instrumentation. |
Pinout & Package
ISL8024IRTAJZ-T7 is housed in a 16-lead 3mm × 3mm Pb-free TQFN package with exposed thermal pad (L16.3x3D), rated for −40°C to +85°C ambient operation and offering θJA = 45°C/W and θJC = 6.5°C/W for efficient heat dissipation.
| 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 stable high-frequency decoupling. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor; carries high di/dt square wave - layout critical for EMI and efficiency. |
| PGND (Pins 11, 12) | Power ground return | Low-impedance path for high-current switch node return; must be separated from SGND and tied under exposed pad. |
| SGND (Pin 10) | Signal ground reference | Reference for FB, COMP, EN, FS, SS, SYNC; connects to exposed pad for optimal noise immunity and thermal conduction. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; internal 0.6V reference sets VOUT = 0.6V × (1 + R2/R3); enables adjustable outputs from 0.8V to VIN. |
| COMP (Pin 9) | Error amplifier output | Used only with external compensation (FS resistor); otherwise disconnected - tie to SGND in internal-compensation mode. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown at power-up; initiates soft-start and soft-stop discharge. |
| PG (Pin 3) | Power-good indicator | Open-drain output with 1ms delay after soft-start; pulled low during faults, UVLO, or startup - requires external 10kΩ–100kΩ pull-up to VIN. |
| FS (Pin 6) | Frequency select | Resistor-to-SGND sets fSW from 500kHz–4MHz; tied to VIN for default 1MHz and internal compensation. |
| SYNC (Pin 4) | Mode control/synchronization | HI = forced PWM (low noise); LO = PFM/SKIP (high efficiency at light load); external clock input up to 4MHz. |
| SS (Pin 7) | Soft-start timing | Tied to SGND for fixed 1ms ramp; capacitor to SGND adjusts ramp time - max 33nF to ensure proper reset after fault. |
| VDD (Pin 2) | Logic supply | Internally connected to VIN; powers internal bias circuitry - no external connection required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power FETs | 45mΩ P-Channel + 19mΩ N-Channel MOSFETs eliminate external switches and reduce BOM count to ≤3 external components. |
| 100% Duty-Cycle Operation | Enables ultra-low dropout (<200mV @ 4A) during battery brownout, extending usable runtime in Li-ion systems. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault detection followed by 8-soft-start-period recovery prevents thermal runaway during sustained short circuits. |
| Pre-Biased Output Start-Up | Supports hot-swap and rail sequencing where output capacitor is pre-charged - avoids reverse current or voltage overshoot. |
| Soft-Stop Output Discharge | Internal 100Ω switch actively discharges output capacitor during shutdown, preventing unintended downstream device wake-up. |
| Adjustable Switching Frequency | Resistor-programmable 500kHz–4MHz range allows optimization for EMI compliance, inductor size, and efficiency across applications. |
Applications
| Microcontroller/FPGA Core Supply | Portable Instrument Power Rail |
|---|---|
|
Use Scenario: Providing clean, tightly regulated 1.2V/1.8V core voltage to ARM Cortex-M7 or Xilinx Artix-7 FPGA under dynamic load steps up to 4A. IC Role / Device Role / Timing Role: Primary POL regulator with fast transient response (enabled by current-mode control) and 1ms PG delay for safe SoC boot sequencing. Use Value: Eliminates need for external power stages while maintaining <±1% output regulation across 0–4A load and −40°C to +85°C. |
Use Scenario: Powering handheld oscilloscope front-end ADCs and signal processors from a single 3.7V Li-ion cell with variable discharge profile. IC Role / Device Role / Timing Role: Main DC/DC converter supporting 100% duty-cycle operation to sustain 3.3V output down to 2.8V input, plus PFM mode for standby current <50µA. Use Value: Extends battery life by >30% versus fixed-frequency alternatives and enables compact 0.22 in² PCB footprint. |
| DC/DC Plug-in Module | Test & Measurement System Rail |
|
Use Scenario: Embedded in modular 1U rack-mount power supplies for telecom routers requiring hot-pluggable 5V-to-1.5V conversion. IC Role / Device Role / Timing Role: High-density buck stage with SYNC pin enabling external clock synchronization to suppress beat frequencies in multi-rail systems. Use Value: Reduces conducted EMI through synchronized switching and eliminates discrete gate drivers or controllers. |
Use Scenario: Generating low-noise 2.5V analog supply for precision DACs and reference buffers in automated test equipment (ATE). IC Role / Device Role / Timing Role: Low-ripple POL regulator operating in forced PWM mode (SYNC = HI) to avoid sub-harmonic noise in sensitive analog sections. Use Value: Achieves <15mVpp output ripple at full load without additional LC filtering, simplifying layout and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS544B20RTWR | 4A, 4.5–18V input, 500kHz–2MHz adjustable fSW, 0.6V ref, but larger 4mm × 4mm QFN package and higher minimum input voltage. | Better suited for higher-input industrial rails (e.g., 12V intermediate bus), not Li-ion direct step-down. | Select when input exceeds 5.5V or board space allows larger package; avoid for 2.7–5.5V battery systems. |
| MP2315GJ-Z | 4A, 4.5–28V input, fixed 500kHz fSW, no SYNC/FS pins, 0.8V ref, lower cost but lacks PFM mode, soft-stop, and pre-bias start-up. | Targeted at cost-sensitive non-battery applications like PoE-powered devices where light-load efficiency is secondary. | Choose for fixed-frequency, high-VIN designs where advanced features like hiccup recovery or 100% duty cycle are unnecessary. |
Compared with TPS544B20RTWR and MP2315GJ-Z, the ISL8024IRTAJZ-T7 uniquely combines ultra-low input voltage support (2.7V), 100% duty cycle, PFM/PWM mode flexibility, and soft-stop discharge - making it optimal for space-constrained, battery-operated systems demanding wide VIN range and robust sequencing.
Availability
ISL8024IRTAJZ-T7 is available at Aetrix Electronics and suitable for microcontroller power delivery, portable instrumentation, and test & measurement systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8024IRTAJZ-T7 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 continues to manufacture and support its high-performance analog and power management portfolio, including DC/DC regulators known for efficiency, integration, and reliability in demanding environments.
The ISL8024IRTAJZ-T7 belongs to Renesas' ISL802x family of compact synchronous buck regulators, designed specifically for high-current, low-voltage point-of-load applications in portable, battery-powered, and space-constrained embedded systems.
FAQ
What is the maximum continuous output current supported by the ISL8024IRTAJZ-T7?
The ISL8024IRTAJZ-T7 delivers up to 4A of continuous output current across the full operating temperature range (−40°C to +85°C) when properly thermally managed using the exposed pad and recommended PCB layout per FN7812 Rev 3.00. Derating applies above +85°C ambient or with insufficient copper area.
Does the ISL8024IRTAJZ-T7 support pre-biased output start-up?
Yes, the ISL8024IRTAJZ-T7 supports pre-biased output start-up. During soft-start initiation, the device operates in SKIP mode and prevents reverse current flow, allowing safe ramp-up even when the output capacitor is initially charged to a voltage near the target VOUT - critical for hot-swap and multi-rail sequencing applications.
How is the switching frequency configured on the ISL8024IRTAJZ-T7?
The ISL8024IRTAJZ-T7 switching frequency is set via the FS pin: tying FS to VIN selects the default 1MHz frequency with internal compensation; connecting a resistor from FS to SGND adjusts fSW from 500kHz to 4MHz using RFS = (220 × 10³)/fOSC(kHz) − 14 kΩ, as defined in Equation 1 of the FN7812 datasheet.
What protection features are integrated into the ISL8024IRTAJZ-T7?
The ISL8024IRTAJZ-T7 integrates overcurrent (hiccup-mode with 17-cycle detection), overtemperature (150°C shutdown, 25°C hysteresis), overvoltage (0.8V PG threshold), undervoltage (80–90% VOUT), negative current (−2.4A limit), and input UVLO (2.7V rising threshold). All protections trigger PG deassertion and initiate recovery sequences.
Can the ISL8024IRTAJZ-T7 operate with 100% duty cycle, and what is the resulting dropout voltage?
Yes, the ISL8024IRTAJZ-T7 supports true 100% duty cycle operation. At 4A load, the dropout voltage equals IOUT × RDS(on)(HS) = 4A × 45mΩ = 180mV maximum - enabling regulation down to VIN ≈ VOUT + 0.18V, which is essential for maximizing Li-ion battery utilization.
ISL8024IRTAJZ-T7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-T7 FAQ
1.How can I place an order for ISL8024IRTAJZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8024IRTAJZ-T7 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-T7 reliable?
The price and inventory of ISL8024IRTAJZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8024IRTAJZ-T7 is usually 5 days.
3.What payment methods are accepted for ISL8024IRTAJZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8024IRTAJZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8024IRTAJZ-T7?
ISL8024IRTAJZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8024IRTAJZ-T7 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-T7?
For technical support, including ISL8024IRTAJZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8024IRTAJZ-T7 requirements.
6.How does Aetrix verify that ISL8024IRTAJZ-T7 is sourced from the original manufacturer or authorized distributors?
All ISL8024IRTAJZ-T7 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-T7 meets industry standards.
7.What is the process for return or replacement of ISL8024IRTAJZ-T7?
All ISL8024IRTAJZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with ISL8024IRTAJZ-T7, 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-T7 part is unused and in its original packaging.
Return procedure for ISL8024IRTAJZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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