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Renesas ISL8013IRZ-T
- Part No.:
- ISL8013IRZ-T
- Manufacturer:
- Renesas
- Package:
- 16-VQFN Exposed Pad
- Datasheet:
-
ISL8013IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,420
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Product details
Overview
ISL8013IRZ-T 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 P- and N-channel MOSFETs, 1MHz PWM switching, 100% duty-cycle operation, and ±3% output voltage accuracy over line/load/temperature. It serves as a primary POL DC/DC converter for FPGA, µP, and DSP core supplies in space-constrained embedded systems.
For engineers reviewing the ISL8013IRZ-T datasheet, ISL8013IRZ-T pinout, ISL8013IRZ-T application, or ISL8013IRZ-T equivalent, key selection considerations include its 35µA quiescent current in PFM mode, 1ms Power-Good delay with open-drain output, selectable forced-PWM/PSM operation, internal soft-start and discharge, and thermal/overcurrent/hiccup-mode protection - all in a 4mm×4mm 16-lead QFN package.
Technical Context
The ISL8013IRZ-T employs current-mode control with internal slope compensation for stable loop dynamics and fast transient response. Its dual-MOSFET architecture enables high efficiency (up to 97%) and low dropout (<300mV at 3A), while the 1MHz fixed-frequency PWM supports compact external magnetics and filtering.
Operation supports three modes: forced PWM (low-noise, constant frequency), pulse-skipping (PFM, high light-load efficiency), and external synchronization (up to 4MHz). Protection includes peak current limiting (4.8A typical), hiccup-mode short-circuit recovery, over-temperature shutdown (140°C), and output overvoltage detection via VFB comparator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without pre-regulation. |
| Output Current | 3A continuous - sufficient for mid-tier FPGA I/O banks or dual-core microprocessors. |
| Switching Frequency | 1MHz (PWM mode) - enables use of ≤2.2µH inductors and reduces EMI filter size vs lower-frequency converters. |
| Quiescent Current | 35µA in PFM mode - extends battery runtime in always-on portable instrumentation. |
| Reference Voltage | 0.8V ±2.5% - sets output accuracy baseline; combined with resistor-divider feedback yields ±3% total output regulation. |
| Power-Good Delay | 1ms after regulation - provides deterministic system reset timing for downstream logic sequencing. |
| Thermal Resistance | θJA = 39°C/W - requires minimal PCB copper area for thermal management in 4×4 QFN footprint. |
Pinout & Package
The ISL8013IRZ-T is housed in a RoHS-compliant, lead-free 16-lead 4mm×4mm QFN package with exposed thermal pad, rated for –40°C to +85°C ambient operation. The exposed pad must be soldered to SGND for electrical integrity and optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 VIN | Main power input | Connects to 2.7–5.5V supply; requires local 10µF ceramic decoupling to PGND. |
| 3 VDD | Analog supply rail | Must be tied directly to VIN; powers internal bandgap and error amplifier. |
| 4 SYNCH | Mode control/sync input | Logic-high = forced PWM; logic-low = PFM; external clock edge-triggered sync up to 4MHz. |
| 5 EN | Enable/disable control | Active-high; drives internal discharge FET during shutdown to rapidly collapse output voltage. |
| 7 PG | Open-drain Power-Good | Asserts high after 1ms delay once VOUT reaches 92% of target; requires external pull-up. |
| 8 VFB | Feedback node | Monitors output via resistor divider; internal 0.8V reference sets regulation point. |
| 13–15 LX | Switch node | Connects to inductor; carries high di/dt switching current; requires tight layout to minimize EMI. |
| 11, 12 PGND | Power ground return | Low-impedance path for high-current switch return; separate from SGND to reduce noise coupling. |
| 9, 10 SGND | Signal ground reference | Reference for VFB, EN, PG, SYNCH; connects to exposed pad for thermal and noise control. |
| 6, 16 NC | No-connect | Not internally bonded; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N MOSFETs | 50mΩ typical RDS(on) each at 5V VIN - eliminates external switches and reduces BOM count by ≥4 components. |
| 100% Duty-Cycle Operation | Enables <300mV dropout at 3A - extends usable battery range in Li-ion-powered devices down to ~2.8V. |
| Internal Soft-Start & Discharge | 1ms ramp time + active output capacitor discharge - prevents inrush current and ensures clean power-down sequencing. |
| Selectably Forced PWM Mode | Eliminates frequency variation and audible noise - critical for RF-sensitive applications like SFP modules and test equipment. |
| Hiccup-Mode Overcurrent Protection | 17-cycle fault counter + 4-soft-start-cycle restart delay - protects against sustained shorts without thermal runaway. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Point-of-load conversion in compact industrial PLC I/O modules requiring stable 1.2V/1.8V rails. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated core voltage with fast load-step response. Use Value: 97% peak efficiency and 35µA quiescent current extend thermal margin and battery life in fanless enclosures. | Use Scenario: Core supply for dual-core ARM Cortex-A9 processors in portable medical imaging subsystems. IC Role / Device Role / Timing Role: High-current step-down regulator with 1ms PG assertion enabling deterministic boot sequencing. Use Value: Internal soft-start prevents inrush-induced brownout during cold start; 100% duty cycle sustains operation as battery discharges. |
| Plug-in DC/DC Modules for Routers and Switchers | Li-ion Battery Powered Devices |
Use Scenario: Hot-pluggable 3.3V/5V intermediate bus converter in modular Ethernet switch line cards. IC Role / Device Role / Timing Role: Isolated or non-isolated POL regulator supporting dynamic load changes up to 3A. Use Value: External SYNC capability allows phase interleaving across multiple ISL8013IRZ-T units to reduce input ripple and eliminate beat frequencies. | Use Scenario: Main system rail in handheld barcode scanners powered by single-cell Li-ion (2.8–4.2V). IC Role / Device Role / Timing Role: Efficient buck converter operating across full battery voltage range with seamless transition into 100% duty cycle. Use Value: 35µA PFM quiescent current minimizes standby drain; hiccup-mode OCP prevents fire hazard during accidental output short. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL8013A | Direct replacement with improved current limit accuracy and tighter VREF tolerance (±1.5% vs ±2.5%). Same pinout and footprint. | Preferred for new designs requiring higher output accuracy under wide temperature ranges. | Select ISL8013A when long-term stability and tighter regulation are required; ISL8013IRZ-T remains viable for legacy cost-sensitive builds. |
| TPS54331DR | 3A buck with 3.5–28V input, no integrated high-side MOSFET, requires external bootstrap capacitor and gate driver. | Suitable for higher-input industrial applications but increases component count and layout complexity. | Choose TPS54331DR only if input exceeds 5.5V; otherwise ISL8013IRZ-T offers superior integration and smaller solution size. |
Compared with ISL8013A, the ISL8013IRZ-T has looser VREF tolerance and less precise current limiting, making it less suitable for precision analog supply rails; compared with TPS54331DR, it delivers lower BOM count and smaller PCB area but lacks high-voltage input capability.
Availability
ISL8013IRZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/µP and FPGA power delivery, and Li-ion battery-powered portable instruments requiring stable component supply and long-lifecycle support.
Supply support for ISL8013IRZ-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 its high-performance analog and power management portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and IoT markets.
The ISL8013IRZ-T belongs to Intersil's legacy high-efficiency synchronous buck regulator family, designed specifically for low-voltage, high-current point-of-load applications in battery-powered and space-constrained embedded systems.
FAQ
What is the maximum output current capability of the ISL8013IRZ-T?
The ISL8013IRZ-T delivers up to 3A continuous output current under recommended operating conditions (TA = –40°C to +85°C, VIN = 2.7V–5.5V). Its peak switch current limit is 4.8A typical, and thermal shutdown activates at 140°C junction temperature to protect against overload. For sustained 3A operation, proper PCB thermal design using the exposed pad is essential - the θJA is 39°C/W in standard JEDEC test conditions.
Does the ISL8013IRZ-T support pre-biased output startup?
Yes, the ISL8013IRZ-T supports pre-biased output startup. During soft-start, the IC operates in SKIP mode and the error amplifier is clamped to prevent reverse current flow, allowing safe startup into an already charged output capacitor. This behavior is confirmed in Figure 26 of the FN6309 datasheet and is critical for hot-swap and multi-rail sequencing applications where downstream circuitry may retain residual voltage.
How does the Power-Good (PG) signal behave during shutdown of the ISL8013IRZ-T?
During shutdown (EN driven low), the ISL8013IRZ-T actively discharges the output capacitor through an internal 100Ω FET, and the PG pin transitions low immediately - it does not assert a delayed de-assertion. The 1ms PG delay applies only at power-up or enable assertion. This rapid PG deactivation ensures downstream logic receives timely reset signaling when the supply is intentionally disabled.
Can the ISL8013IRZ-T synchronize to an external clock above 1MHz?
Yes, the ISL8013IRZ-T supports external synchronization up to 4MHz via the SYNCH pin, triggered on the falling edge. However, minimum on-time constraints apply: the LX node must remain high for ≥140ns. At 4MHz, this limits achievable duty cycle to ≥56% (140ns × 4MHz = 0.56), meaning input-to-output voltage ratios below ~1.8V may not sustain regulation at maximum sync frequency.
What is the purpose of separating PGND and SGND pins on the ISL8013IRZ-T?
The ISL8013IRZ-T separates PGND (pins 11,12) and SGND (pins 9,10) to isolate high-current switching return paths from sensitive analog reference and feedback circuitry. PGND carries pulsed inductor current and LX node return; SGND serves as the quiet reference for VFB, EN, PG, and SYNCH. Routing these grounds separately - then joining them at a single point near the exposed pad - minimizes noise coupling and improves regulation accuracy and stability.
ISL8013IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-VQFN 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):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 3A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (4x4)
ISL8013IRZ-T FAQ
1.How can I place an order for ISL8013IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8013IRZ-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 ISL8013IRZ-T reliable?
The price and inventory of ISL8013IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8013IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8013IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8013IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8013IRZ-T?
ISL8013IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8013IRZ-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 ISL8013IRZ-T?
For technical support, including ISL8013IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8013IRZ-T requirements.
6.How does Aetrix verify that ISL8013IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8013IRZ-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 ISL8013IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8013IRZ-T?
All ISL8013IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8013IRZ-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 ISL8013IRZ-T part is unused and in its original packaging.
Return procedure for ISL8013IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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