My Inquiry
My Account
Renesas ISL8023IRTAJZ-T7A
- Part No.:
- ISL8023IRTAJZ-T7A
- Manufacturer:
- Renesas
- Package:
- 16-WFQFN Exposed Pad
- Datasheet:
-
ISL8023IRTAJZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:315
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL8023IRTAJZ-T7A from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 3A 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 compact, high-efficiency point-of-load (POL) power supply for microcontrollers, FPGAs, and portable Li-ion-powered systems.
For engineers reviewing the ISL8023IRTAJZ-T7A datasheet, ISL8023IRTAJZ-T7A pinout, ISL8023IRTAJZ-T7A application, or ISL8023IRTAJZ-T7A equivalent, key selection considerations include its adjustable output configuration, 1ms power-good delay, soft-stop output discharge, hiccup-mode overcurrent protection, and compatibility with low-ESR ceramic capacitors and sub-2.2µH inductors in space-constrained designs.
Technical Context
The ISL8023IRTAJZ-T7A 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 programmable frequency range. Its dual-mode operation-PWM (forced continuous) or PFM (discontinuous)-is selected via the SYNC pin.
It integrates comprehensive protection: overcurrent (5.2–7.8A peak limit), negative current (-1.8 to -3.0A), overvoltage, undervoltage, thermal shutdown (150°C), and UVLO (2.7V rising threshold). The 100% duty-cycle capability supports ultra-low dropout (<200mV at 4A), critical for battery-end-of-life operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3A continuous - supports mid-power digital loads without external heatsinking in 3×3mm QFN. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (2.7–4.2V), USB 5V, and regulated 3.3V rails. |
| Reference Voltage | 0.600V ±0.003V (±0.5%) - enables precise output regulation down to 0.8V using external resistor divider. |
| Switching Frequency | Default 1MHz (FS tied to VIN); adjustable 500kHz–4MHz - balances efficiency, size, and EMI in layout-sensitive applications. |
| Efficiency | Up to 95% at 1.8V/3A (5VIN) - achieved via low-RDS(on) integrated FETs (45mΩ HS / 19mΩ LS) and optimized gate drive. |
| Power-Good Delay | 1ms after regulation - provides deterministic system reset timing for µC/FPGA sequencing. |
| Quiescent Current | 50µA (PFM, no load) - extends battery runtime in always-on or low-duty-cycle portable instruments. |
Pinout & Package
ISL8023IRTAJZ-T7A is housed in a 16-lead 3mm × 3mm Pb-free TQFN package with exposed thermal pad (L16.3x3D), rated θJA = 45°C/W and θJC = 6.5°C/W. The exposed pad must be soldered to SGND for electrical integrity and optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1, 16) | Input power supply | Accepts 2.7–5.5V; requires dual 22µF ceramic bypass caps to PGND for stability and ripple suppression. |
| PHASE (Pins 13–15) | Switching node | Connects directly to inductor high-side terminal; carries high di/dt; layout minimizes 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, SYNC, FS, PG; connects to exposed pad and forms star ground for analog circuitry. |
| FB (Pin 8) | Feedback input | Senses output voltage via resistor divider; internal 0.6V reference sets VOUT = 0.6V × (1 + R2/R3); supports pre-biased start-up. |
| COMP (Pin 9) | Error amplifier output | Used only when external compensation is applied (FS resistor present); otherwise connect to SGND for internal compensation. |
| EN (Pin 5) | Enable control | Active-high logic input; internal 1MΩ pull-down ensures safe shutdown on floating; initiates soft-start and soft-stop discharge. |
| PG (Pin 3) | Power-good indicator | Open-drain output requiring external 10kΩ–100kΩ pull-up to VIN; asserts after 1ms delay when VOUT is within ±15% of target. |
| SS (Pin 7) | Soft-start timing | Internal 1ms ramp when tied to SGND; capacitor to SGND adjusts ramp time (TSS ≈ CSS × 1.6µA); max 33nF recommended. |
| FS (Pin 6) | Frequency set | Resistor to SGND programs fSW = 220kΩ / RFS – 14kHz; tie to VIN for default 1MHz and internal compensation. |
| SYNC (Pin 4) | Mode selection | Logic high → PWM mode; logic low → PFM/skip mode; external clock input up to 4MHz for synchronization. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | 45mΩ P-Channel + 19mΩ N-Channel MOSFETs - eliminates external switches, reduces BOM count, and improves thermal coupling. |
| Adjustable Switching Frequency | 500kHz–4MHz via single FS resistor - enables optimization for size (high-f), efficiency (mid-f), or EMI (synchronized low-f). |
| Soft-Stop Output Discharge | Internal 100Ω switch activates during shutdown - prevents floating outputs and ensures clean power-down in multi-rail systems. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault detection → shutdown → 8-soft-start-cycle retry - protects against sustained short circuits without latch-up. |
| Pre-Biased Output Start-Up | Operates in SKIP mode during soft-start - safely ramps output from non-zero initial voltage without reverse current flow. |
Applications
| DC/DC POL Modules | µC/µP and FPGA Core Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC module supplying 1.2V/1.8V to ASICs in telecom line cards or industrial PLCs. IC Role / Device Role / Timing Role: Primary step-down regulator providing tightly regulated core voltage with fast load-step response. Use Value: 95% peak efficiency and 1MHz operation enable <0.22 in² solution size while maintaining <±1% output regulation under 3A dynamic load. |
Use Scenario: Powering ARM Cortex-M7 or Xilinx Artix-7 FPGA core rails in handheld test equipment. IC Role / Device Role / Timing Role: High-efficiency, low-noise POL converter with programmable frequency to avoid sensitive RF bands. Use Value: PFM mode reduces quiescent current to 50µA, extending battery life; 1ms PG delay aligns with processor reset timing requirements. |
| Li-ion Battery-Powered Devices | Portable Instruments |
Use Scenario: Power management in handheld medical glucose meters or portable gas analyzers operating from 3.6V nominal Li-ion cells. IC Role / Device Role / Timing Role: Main system regulator supporting wide input range (2.7–5.5V) and 100% duty cycle for end-of-discharge operation. Use Value: <200mV dropout at 3A allows >30 minutes of additional runtime below 3.0V cell voltage versus non-100% duty-cycle alternatives. |
Use Scenario: Supplying 3.3V/2.5V rails to precision ADCs, op-amps, and wireless SoCs in portable oscilloscopes or multimeters. IC Role / Device Role / Timing Role: Low-noise, low-ripple power source with soft-start to prevent inrush-induced measurement artifacts. Use Value: Internal soft-start (1ms) and optional external capacitor allow controlled ramp rate; PG signal validates rail stability before data acquisition begins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS543320RTVR | 4A output, 4.5–18V input, 2.2MHz fixed frequency, integrated compensation, no PFM mode | Better suited for higher-input industrial rails; lacks light-load PFM efficiency and pre-biased start-up | Select when input exceeds 5.5V or when forced-CM PWM-only operation is preferred over adaptive PFM. |
| MP2315GJ-Z | 3A output, 4.5–28V input, 500kHz–2.5MHz adjustable, no PG pin, lower accuracy reference (1.0V ±2%) | Targeted at cost-sensitive industrial supplies; missing power-good signaling and tight 0.6V reference | Choose for non-critical 3.3V/5V rails where PG monitoring and ±0.5% regulation are not required. |
Compared with TPS543320RTVR and MP2315GJ-Z, ISL8023IRTAJZ-T7A uniquely combines 2.7V–5.5V input flexibility, 0.6V ±0.5% reference, integrated PG with 1ms delay, and seamless pre-biased start-up-making it optimal for battery-powered, space-constrained, and sequencing-sensitive embedded systems.
Availability
ISL8023IRTAJZ-T7A 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 ISL8023IRTAJZ-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 Corporation acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL8023 family. Renesas is a global semiconductor leader focused on embedded processing, analog, power, and connectivity solutions.
The ISL8023 series was designed specifically for high-density, high-efficiency point-of-load conversion in portable and battery-operated systems, emphasizing minimal external components, ultra-low quiescent current, and robust protection for unattended operation.
FAQ
What is the maximum output current capability of the ISL8023IRTAJZ-T7A?
The ISL8023IRTAJZ-T7A delivers up to 3A of continuous output current under typical conditions (TA ≤ +85°C, proper PCB thermal design). Peak current limit is 5.2–7.8A depending on temperature and input voltage, with hiccup-mode protection engaging after 17 consecutive overcurrent cycles. Derating applies above +85°C ambient per the device's thermal resistance (θJA = 45°C/W).
Does the ISL8023IRTAJZ-T7A support pre-biased output start-up?
Yes, the ISL8023IRTAJZ-T7A supports pre-biased output start-up. During soft-start, it operates in SKIP mode to prevent reverse current flow into the output capacitor. This allows safe ramping from an initial non-zero output voltage - essential in multi-rail systems where downstream regulators may retain charge when upstream supplies restart.
How is the switching frequency configured on the ISL8023IRTAJZ-T7A?
The ISL8023IRTAJZ-T7A switching frequency is set via the FS pin: tying FS to VIN selects the default 1MHz frequency with internal compensation; connecting a resistor RFS from FS to SGND programs fSW = (220kΩ / RFS) – 14kHz, covering 500kHz to 4MHz. External synchronization up to 4MHz is also supported via the SYNC pin.
What protection features are integrated into the ISL8023IRTAJZ-T7A?
The ISL8023IRTAJZ-T7A integrates overcurrent (hiccup-mode), overvoltage, undervoltage lockout (UVLO), thermal shutdown (150°C), negative current detection, and power-good monitoring. Faults trigger automatic recovery attempts after defined delays - e.g., thermal shutdown resumes at 125°C with full soft-start, and overcurrent faults retry after eight soft-start intervals.
Can the ISL8023IRTAJZ-T7A operate with a 100% duty cycle?
Yes, the ISL8023IRTAJZ-T7A supports true 100% duty cycle operation. When input voltage approaches the output voltage, the high-side P-Channel MOSFET remains fully on, minimizing dropout to IOUT × RDS(on) (≤135mV at 3A, typical). This extends usable battery life in Li-ion applications by maintaining regulation down to ~2.85V input for a 1.8V output.
ISL8023IRTAJZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 3A
- 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)
ISL8023IRTAJZ-T7A FAQ
1.How can I place an order for ISL8023IRTAJZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8023IRTAJZ-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 ISL8023IRTAJZ-T7A reliable?
The price and inventory of ISL8023IRTAJZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8023IRTAJZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8023IRTAJZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8023IRTAJZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8023IRTAJZ-T7A?
ISL8023IRTAJZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8023IRTAJZ-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 ISL8023IRTAJZ-T7A?
For technical support, including ISL8023IRTAJZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8023IRTAJZ-T7A requirements.
6.How does Aetrix verify that ISL8023IRTAJZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8023IRTAJZ-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 ISL8023IRTAJZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8023IRTAJZ-T7A?
All ISL8023IRTAJZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8023IRTAJZ-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 ISL8023IRTAJZ-T7A part is unused and in its original packaging.
Return procedure for ISL8023IRTAJZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL8023IRTAJZ-T7A 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…
