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Renesas ISL8510IRZ
- Part No.:
- ISL8510IRZ
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
ISL8510IRZ.pdf
- Description:
- IC REG DL BUCK/LNR 500KHZ 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
ISL8510IRZ from Renesas (formerly Intersil) is a dual-output power management IC integrating a 1A synchronous buck PWM controller with internal N-channel MOSFET and a 500mA adjustable LDO regulator. It delivers regulated outputs from 0.6V to 20V (PWM) and 0.6V to 4.2V (LDO), operates across 5.5V–25V or fixed 5V input, and features independent enable, power-good, and protection circuits - used in FPGA core/logic supply and wireless chipset power rails.
For engineers reviewing the ISL8510IRZ datasheet, ISL8510IRZ pinout, ISL8510IRZ application, or ISL8510IRZ equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, and real-world selection guidance for point-of-load DC/DC + LDO co-designs requiring compact dual-rail solutions.
Technical Context
The ISL8510IRZ implements voltage-mode PWM control with input voltage feed-forward for stable regulation across wide VIN ranges, and uses an internal 500kHz oscillator to drive the integrated 350mΩ (typ) N-channel MOSFET. Its dual-regulator architecture separates buck and LDO control paths, each with dedicated EN, PGOOD, and fault monitoring - enabling independent sequencing and rail-specific fault isolation.
Thermal protection triggers at +150°C with 15°C hysteresis, while overcurrent detection on the PWM stage uses rDS(ON) sensing with 2.7A (typ) trip threshold and 150ns blanking. The LDO employs internal PMOS pass devices with 300mV (max) dropout at 450mA and ±1.5% FB accuracy, with no overvoltage protection but latch-off under undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PWM Output Current | 1A continuous - supports FPGA I/O banks or baseband processors without external current boosting. |
| LDO Output Current | 500mA max - sufficient for RF transceiver bias or low-noise analog circuitry with <300mV dropout. |
| Switching Frequency | Fixed 500kHz - enables compact 10µH inductors and reduces EMI filtering complexity vs lower-frequency alternatives. |
| Input Voltage Range | 5.5V–25V (variable) or 4.5V–5.5V (fixed 5V) - compatible with 12V industrial rails or USB-powered systems. |
| Reference Voltage | 0.6V ±1.5% - sets precise output thresholds via resistor divider; enables sub-1V core voltages for modern SoCs. |
| Thermal Shutdown | +150°C junction with 15°C hysteresis - prevents permanent damage during sustained overload or poor PCB heatsinking. |
| Package | 24-pin 4mm×4mm QFN - exposes thermal pad for direct GND soldering; θJA = 36°C/W enables >1W dissipation in standard layouts. |
Pinout & Package
ISL8510IRZ is housed in a thermally enhanced 24-lead 4mm×4mm Quad Flat No-Lead (QFN) package with exposed thermal pad. The pad must be soldered to a solid GND plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | PWM controller enable input | Logic-high (>1.7V) initiates soft-start; pull-to-GND disables PWM output and reduces quiescent current to 100µA. |
| EN_LDO | LDO regulator enable input | Independent logic-level control; latches off if voltage drops below 1.2V (rising edge threshold). |
| FB_PWM | PWM feedback node | Connects to resistor divider; error amplifier compares this to 0.6V reference to regulate output voltage. |
| FB_LDO | LDO feedback node | Sets LDO output via external divider; supports 0.6V–4.2V range with ±1.5% accuracy over temperature. |
| PG_PWM / PG_LDO | Open-drain power-good indicators | Active-low signals pulled low during soft-start, undervoltage (<84% nominal), or fault; require 100kΩ pull-up to VCC. |
| VIN / PVCC | Main input and power-stage supply | VIN powers internal LDO (→ VCC); PVCC connects directly to VCC and supplies gate driver - decouple with ≥1µF ceramic. |
| PHASE / BOOT | Switch node and bootstrap supply | PHASE connects to inductor/diode; BOOT requires capacitor to PHASE to sustain high-side MOSFET gate drive. |
| VOUT / VIN_LDO | LDO output and input pins | VOUT delivers regulated LDO output; VIN_LDO accepts 1.8V–4.6V input - must exceed VOUT by ≥300mV for regulation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated buck switch + boot diode | Eliminates external high-side driver and discrete bootstrap diode - reduces BOM count and layout area by ≥3 components. |
| Independent dual PGOOD outputs | Enables system-level power sequencing verification: PG_PWM confirms buck regulation; PG_LDO validates LDO stability separately. |
| Externally adjustable soft-start | SS pin accepts capacitor (e.g., 100nF → ~2ms ramp); prevents inrush current into downstream capacitors and avoids brownout. |
| Voltage-mode control with feed-forward | Rejects input ripple without complex compensation - simplifies loop design using single-pole RC network on COMP/FB_PWM. |
| Dual independent enable inputs | EN and EN_LDO allow staggered startup (e.g., LDO first for bias, then buck for core) or independent shutdown for power gating. |
Applications
| FPGA Core & I/O Power | Wireless Baseband Supply |
|---|---|
Use Scenario: Powering Xilinx Spartan-6 FPGA with separate 1.2V core and 3.3V I/O rails from a 12V intermediate bus. IC Role / Device Role / Timing Role: ISL8510IRZ generates both rails simultaneously - buck regulates 1.2V @ 1A for core logic; LDO delivers clean 3.3V @ 500mA for I/O buffers. Use Value: Single-chip dual-rail solution eliminates need for two discrete regulators, reducing board area by 40% and simplifying thermal management. |
Use Scenario: Supplying Qualcomm QCA9377 Wi-Fi/BT combo chip requiring 1.1V RF core, 1.8V digital, and 3.3V interface rails. IC Role / Device Role / Timing Role: ISL8510IRZ buck supplies 1.1V core; LDO provides low-noise 1.8V for digital PHY - both sequenced via EN/EN_LDO. Use Value: LDO's <300mV dropout and ±1.5% accuracy ensure stable 1.8V under dynamic load, minimizing bit errors in 802.11ac packet transmission. |
| Handheld Instrument Power | Compact Flash Card Regulator |
Use Scenario: Battery-powered oscilloscope module needing 3.3V analog front-end and 1.8V ADC/DAC supply from 7.4V Li-ion. IC Role / Device Role / Timing Role: ISL8510IRZ buck converts 7.4V→3.3V for analog section; LDO post-regulates to 1.8V for noise-sensitive data converters. Use Value: LDO's PSRR >60dB at 100kHz suppresses switching noise from buck stage, preserving ADC SNR above 80dB. |
Use Scenario: PCMCIA-based CompactFlash adapter requiring 3.3V VCC and 1.8V VIO from 5V host bus. IC Role / Device Role / Timing Role: ISL8510IRZ accepts 5V input directly on VIN/VCC; buck delivers 3.3V; LDO generates 1.8V with fast transient response. Use Value: Fixed 5V mode eliminates external bias supply; 500kHz switching ensures fast load-step recovery (<10µs) during CF card read/write bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65270PWP | Two independent 2A buck controllers (no LDO); requires external LDO for second rail; 2.2MHz switching. | Better suited for high-current, space-constrained apps where both rails demand >1A; lacks integrated LDO simplicity. | Choose TPS65270PWP when both rails require >1A and board area allows discrete LDO addition. |
| MAX16922ATP+ | Automotive-grade dual buck (1.5A + 0.5A); includes watchdog, reset, and AEC-Q100 qualification; no integrated LDO. | Designed for automotive infotainment; adds functional safety features not present in ISL8510IRZ. | Choose MAX16922ATP+ only for automotive environments requiring AEC-Q100 compliance and system monitoring. |
Compared with TPS65270PWP and MAX16922ATP+, the ISL8510IRZ uniquely integrates a buck controller with an LDO in one QFN package - offering lowest component count for mixed-signal systems needing one switched and one linear rail, without automotive or ultra-high-current requirements.
Availability
ISL8510IRZ is available at Aetrix Electronics and suitable for FPGA power delivery, wireless chipset biasing, handheld instrument supply, and CompactFlash card regulation requiring stable component supply across industrial temperature ranges (-40°C to +85°C).
Supply support for ISL8510IRZ 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 support for legacy power management products including the ISL8510IRZ family.
The ISL8510IRZ belongs to Intersil's dual-output point-of-load controller product line, designed specifically for space-constrained applications requiring simultaneous switching and linear regulation - such as FPGA, WLAN, and portable instrumentation platforms.
FAQ
What input voltage ranges does the ISL8510IRZ support?
The ISL8510IRZ supports two distinct input configurations: a variable range of 5.5V to 25V applied to VIN only (with internal 5V LDO powering VCC), or a fixed 5V ±10% supply connected to both VIN and VCC pins. Operation outside these ranges risks damage or loss of regulation - absolute maximum VIN is +26V, and VIN_LDO must stay within 1.8V–4.6V.
How does the ISL8510IRZ handle overcurrent conditions on the PWM output?
The ISL8510IRZ monitors overcurrent via rDS(ON) sensing of its internal N-channel MOSFET, with a typical trip threshold of 2.7A and 150ns blanking time to ignore switching spikes. Upon detection, it latches off the PWM output and pulls PG_PWM low until a full restart cycle - including EN re-assertion and soft-start - clears the fault condition.
Can the ISL8510IRZ generate a 1.0V output from a 12V input?
Yes - the ISL8510IRZ PWM output is adjustable from 0.6V to 20V using an external resistor divider on FB_PWM. For 1.0V output, use R1 = 10kΩ and R2 ≈ 6.7kΩ (per VOUT = 0.6V × (1 + R1/R2)). Ensure minimum 1mA divider current and verify thermal performance: at 12V→1V/1A, efficiency is ~75%, requiring adequate PCB copper for heat dissipation.
What is the purpose of the CC pin on the ISL8510IRZ?
The CC pin on the ISL8510IRZ is the compensation capacitor connection for the LDO regulator. A 0.033µF capacitor must be placed between CC and GND to stabilize the LDO control loop and prevent oscillation - omitting or undersizing this capacitor causes output instability and excessive ripple under load.
Does the ISL8510IRZ provide overvoltage protection on either output?
No - the ISL8510IRZ includes overcurrent, thermal, and undervoltage protection on both the PWM and LDO outputs, but it has no overvoltage protection circuitry. If output voltage exceeds safe levels due to feedback resistor failure or external fault, the device cannot clamp or shut down to prevent damage to downstream components.
ISL8510IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 500kHz
- Voltage/Current - Output 1:
- 0.6V ~ 20V, 1A
- Voltage/Current - Output 2:
- 0.6V ~ 4.2V, 500mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 5V, 5.5V ~ 25V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
ISL8510IRZ FAQ
1.How can I place an order for ISL8510IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8510IRZ 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 ISL8510IRZ reliable?
The price and inventory of ISL8510IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8510IRZ is usually 5 days.
3.What payment methods are accepted for ISL8510IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8510IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8510IRZ?
ISL8510IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8510IRZ 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 ISL8510IRZ?
For technical support, including ISL8510IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8510IRZ requirements.
6.How does Aetrix verify that ISL8510IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8510IRZ 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 ISL8510IRZ meets industry standards.
7.What is the process for return or replacement of ISL8510IRZ?
All ISL8510IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8510IRZ, 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 ISL8510IRZ part is unused and in its original packaging.
Return procedure for ISL8510IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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