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Renesas ISL8500IRZ-T
- Part No.:
- ISL8500IRZ-T
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL8500IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 2A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,168
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Product details
Overview
ISL8500IRZ-T from Renesas (formerly Intersil) is a 2A standard buck PWM regulator with integrated N-channel power MOSFET and internal 5V LDO bias regulator. It delivers adjustable output voltage from 0.6V to 19V at up to 2A continuous current, operates from 5.5V–25V input or fixed 5V ±10%, switches at fixed 500kHz, and includes PGOOD, soft-start, overcurrent, thermal, and undervoltage protection - used in WLAN cards, LCD panels, and handheld instruments.
For engineers reviewing the ISL8500IRZ-T datasheet, ISL8500IRZ-T pinout, ISL8500IRZ-T application, or ISL8500IRZ-T equivalent, key selection considerations include its 12-lead DFN package, voltage-mode control with input feed-forward, ±1% FB reference tolerance, externally adjustable soft-start, and requirement for an external Schottky diode in the buck topology.
Technical Context
The ISL8500IRZ-T implements a standard buck architecture using voltage-mode PWM control with input voltage feed-forward to reject line variation and simplify loop compensation. Its error amplifier drives the PWM comparator via the COMP pin, while the FB pin senses output voltage against a precise 0.6V reference with ±1% tolerance.
It integrates a 120mΩ (typ) rDS(ON) N-channel MOSFET and relies on external components - including a Schottky diode, bootstrap capacitor, and output inductor - to complete the power stage. Protection logic monitors phase current via MOSFET VDS, detects FB undervoltage (75% nominal), and triggers thermal shutdown at 150°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | Up to 2A continuous - supports compact point-of-load regulation for FPGA I/O or wireless baseband supplies. |
| Input Voltage Range | 5.5V–25V (variable) or 5V ±10% (fixed) - accommodates unregulated battery rails or regulated system supplies. |
| Output Voltage Range | 0.6V–19V adjustable via resistor divider - enables direct core supply for processors down to sub-1V or higher analog rails. |
| Switching Frequency | Fixed 500kHz (450–550kHz min/max) - balances efficiency, size, and EMI; enables use of small 10µH inductors. |
| Reference Voltage Accuracy | ±1% (0.594V–0.606V) - ensures tight output regulation across temperature and load without trimming. |
| Protection Features | Integrated OCP (3.2A typ trip), UVP (75% VOUT), thermal shutdown (150°C), and PGOOD - reduces need for external fault management circuitry. |
| Package | 12-lead 4mm × 3mm DFN with exposed thermal pad - provides low θJA = 39°C/W for high-power density in space-constrained designs. |
Pinout & Package
ISL8500IRZ-T is housed in a RoHS-compliant, Pb-free 12-lead Dual Flat No-Lead (DFN) package measuring 4mm × 3mm with an exposed thermal pad (PKG DWG # L12.4x3). The exposed pad must be soldered to PCB ground for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB (1) | Inverting input to error amplifier | Senses output voltage via resistor divider; sets regulation point relative to 0.6V internal reference. |
| COMP (2) | Error amplifier output | Provides compensation node for external RC network to stabilize voltage-mode control loop. |
| SS (3) | Soft-start timing input | Charged by internal 30µA current source; linear ramp controls output voltage rise time during startup. |
| EN (4) | Enable logic input | Active-high enable: device starts when voltage exceeds 1.7V; pulls supply current to 100µA in shutdown. |
| PG (5) | Open-drain power-good flag | Asserts low when VOUT deviates >12% from target or during soft-start; requires external 100kΩ pull-up to VDD. |
| GND (6) | Power and signal ground | Reference for all voltages; exposed pad must be connected to PCB ground plane for thermal relief. |
| VDD (7) | Internal 5V LDO output | Bias supply for control circuitry; can accept external 5V input when tied to VIN (bypass mode). |
| BOOT (8) | Bootstrap gate drive supply | Charged via external capacitor to PHASE; enables high-side N-MOSFET gate drive above VIN rail. |
| PHASE (9,10) | Switch node connection | Connects to MOSFET source, inductor, and Schottky diode cathode - carries high dv/dt switching waveform. |
| VIN (11,12) | Main input power supply | Supplies PWM power stage and feeds internal LDO; requires local 10µF ceramic decoupling capacitance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated N-channel power MOSFET | rDS(ON) = 120mΩ typical enables self-contained 2A buck solution with minimal external components. |
| Voltage-mode control with feed-forward | Rejects input line variation and simplifies loop compensation - reduces design iteration vs. current-mode alternatives. |
| Externally adjustable soft-start | Capacitor on SS pin sets startup time (TSS ≈ 50 × CSS); prevents inrush current and stabilizes multi-rail sequencing. |
| Integrated 5V LDO regulator | Generates stable VDD bias from VIN (5.5–25V), eliminating need for separate bias supply in most applications. |
| Comprehensive protection suite | OCP, thermal shutdown, UVP, and PGOOD provide autonomous fault response - improves system reliability without MCU supervision. |
Applications
| WLAN PCMCIA/MiniPCI Cards | LCD Panel Power |
|---|---|
Use Scenario: Regulating 1.8V or 3.3V rails for RF transceivers and baseband processors on compact wireless interface cards. IC Role / Device Role / Timing Role: Primary buck converter delivering tightly regulated, low-noise DC power with fast transient response. Use Value: Enables single-chip 2A solution with integrated MOSFET and PGOOD - reduces BOM count and board area versus controller + discrete FET designs. | Use Scenario: Supplying adjustable backlight or logic voltage (e.g., 5V, 12V) to TFT-LCD modules in portable displays. IC Role / Device Role / Timing Role: Adjustable-output buck regulator supporting multiple panel configurations via FB resistor selection. Use Value: 0.6V–19V output range and ±1% reference accuracy allow precise voltage setting across diverse display models without redesign. |
| Hand-Held Instruments | Set-Top Box SoC Core Supply |
Use Scenario: Providing clean, sequenced 1.2V or 1.5V core voltage for microcontrollers and ADCs in battery-powered test equipment. IC Role / Device Role / Timing Role: Main DC-DC converter with soft-start and enable control for controlled power-up of mixed-signal subsystems. Use Value: EN and SS pins support deterministic power sequencing; low 100µA shutdown current extends battery life during standby. | Use Scenario: Delivering 1.0V–1.3V core voltage to media processor SoCs requiring stable, ripple-sensitive supply under dynamic load. IC Role / Device Role / Timing Role: High-accuracy buck regulator with 500kHz switching and voltage-mode control for low-output-impedance delivery. Use Value: ±1% VFB tolerance and feed-forward architecture maintain <±15mV regulation across 0–2A load steps - critical for SoC stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2307DN-LF-Z | 3A rated, 340kHz switching, no integrated boot diode, requires external bootstrap diode; different pinout and compensation scheme. | Higher current capability but larger solution size due to external diode and different layout requirements. | Select when >2A output or lower switching frequency is required; verify PCB layout compatibility before substitution. |
| TPS54202DRCT | 2A synchronous buck, 500kHz, integrated high- and low-side FETs, no external diode needed; uses current-mode control. | Eliminates Schottky diode loss and improves light-load efficiency; requires different compensation and feedback configuration. | Prefer for higher efficiency or simplified bill-of-materials where synchronous rectification is acceptable. |
Compared with MP2307DN-LF-Z and TPS54202DRCT, the ISL8500IRZ-T offers a proven voltage-mode architecture with integrated boot diode and simpler loop compensation, making it suitable for cost-sensitive, space-constrained designs where external diode integration is acceptable and 2A output suffices.
Availability
ISL8500IRZ-T is available at Aetrix Electronics and suitable for WLAN card power, LCD panel supplies, and handheld instrument designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8500IRZ-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 full technical and supply chain support for legacy Intersil power products.
The ISL8500IRZ-T belongs to Intersil's standard buck regulator product line, designed for compact, high-efficiency point-of-load conversion in space-constrained consumer and industrial applications.
FAQ
What input voltage ranges does the ISL8500IRZ-T support?
The ISL8500IRZ-T supports two input configurations: a variable range of 5.5V to 25V (using VIN only), or a fixed 5V ±10% supply (with VIN and VDD tied together). In the 5.5–25V mode, the internal 5V LDO powers control circuitry; in 5V mode, the LDO is bypassed. Both configurations require proper decoupling per the datasheet.
Does the ISL8500IRZ-T require an external Schottky diode?
Yes, the ISL8500IRZ-T requires an external Schottky diode connected between PHASE and GND. It integrates only the high-side N-channel MOSFET; the diode completes the buck power stage. A Schottky type (e.g., B340LB) is recommended to minimize conduction loss and improve efficiency, especially at higher currents and lower output voltages.
How is output voltage set on the ISL8500IRZ-T?
Output voltage is set using an external resistor divider from VOUT to GND, with the FB pin connected to the divider midpoint. The formula is R4 = R1 × (VOUT − 0.6V) / 0.6V, where R1 is typically 1kΩ–10kΩ. The internal 0.6V reference has ±1% tolerance, enabling accurate regulation from 0.6V up to 19V depending on resistor selection and thermal management.
What protection features are integrated into the ISL8500IRZ-T?
The ISL8500IRZ-T integrates overcurrent protection (OCP) triggered at ~3.2A, thermal shutdown at 150°C with 15°C hysteresis, output undervoltage protection (UVP) at 75% of nominal VOUT, and a PGOOD output that asserts low during faults or soft-start. These features operate autonomously without external circuitry, enhancing system robustness in unattended operation.
Can the ISL8500IRZ-T operate without an external soft-start capacitor?
No - the ISL8500IRZ-T requires an external capacitor from SS to GND to control startup behavior. Without it, the soft-start function cannot ramp the output voltage, risking inrush current, overshoot, or failure to regulate. The capacitor value determines soft-start duration (TSS ≈ 50 × CSS), and the SS pin must be left floating or pulled low only during intentional disable.
ISL8500IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-VFDFN 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):
- 4.5V
- Voltage - Input (Max):
- 25V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 19V
- Current - Output:
- 2A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
ISL8500IRZ-T FAQ
1.How can I place an order for ISL8500IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8500IRZ-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 ISL8500IRZ-T reliable?
The price and inventory of ISL8500IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8500IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8500IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8500IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8500IRZ-T?
ISL8500IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8500IRZ-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 ISL8500IRZ-T?
For technical support, including ISL8500IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8500IRZ-T requirements.
6.How does Aetrix verify that ISL8500IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8500IRZ-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 ISL8500IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8500IRZ-T?
All ISL8500IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8500IRZ-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 ISL8500IRZ-T part is unused and in its original packaging.
Return procedure for ISL8500IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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