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Renesas ISL8088IRZ-T7A
- Part No.:
- ISL8088IRZ-T7A
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL8088IRZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,501
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Product details
Overview
ISL8088IRZ-T7A from Renesas Electronics (formerly Intersil) is a dual-channel synchronous buck DC/DC regulator delivering up to 800mA per channel with 2.25MHz fixed switching frequency, 0.6V feedback reference, and selectable forced PWM or PFM mode. It operates from 2.75V–5.5V input and supports output voltages as low as 0.6V - ideal for powering microcontrollers and FPGAs in space-constrained Li-ion battery devices.
For engineers reviewing the ISL8088IRZ-T7A datasheet, ISL8088IRZ-T7A pinout, ISL8088IRZ-T7A application, or ISL8088IRZ-T7A equivalent, key selection considerations include its 30µA light-load quiescent current in PFM mode, 1ms power-good timing, internal digital soft-start, and 10-lead 3mm×3mm DFN package with exposed thermal pad.
Technical Context
The ISL8088IRZ-T7A employs current-mode control with integrated slope compensation and transconductance error amplifiers for fast transient response and stable loop behavior across load and line variations. Its dual in-phase channels share a single oscillator and support independent enable (EN1/EN2) and feedback (FB1/FB2) networks.
It implements dual-mode operation: forced PWM (SYNC = GND) ensures constant 2.25MHz switching for EMI-sensitive applications, while PFM mode (SYNC = VIN) reduces quiescent current to 30µA at light loads. External synchronization up to 4MHz is supported via negative-edge-triggered SYNC pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current per Channel | 800mA continuous - sufficient to power core logic of mid-tier microcontrollers or FPGA I/O banks without external boost stages. |
| Switching Frequency | 2.25MHz (typical), adjustable 2.7–4MHz via SYNC - enables use of compact 2.2µH inductors and 10µF ceramic output capacitors, minimizing PCB area to <1.8cm². |
| Feedback Reference Voltage | 0.6V ±10mV - allows precise low-voltage regulation down to 0.6V using standard resistor dividers; supports 1.8V/2.5V dual-rail POL designs. |
| Quiescent Current (PFM) | 30µA total for both channels - extends battery runtime in always-on sensor nodes or standby modes of portable instrumentation. |
| Power-Good Delay | 1ms fixed delay - provides deterministic system reset timing after both outputs reach regulation, compatible with µC reset controllers requiring stable VDD before release. |
| Thermal Shutdown | 150°C with 25°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures without requiring external thermal monitoring. |
| Package | 10-lead 3mm×3mm DFN with exposed pad - achieves θJA = 49°C/W and θJC = 4°C/W for high-power-density thermal management. |
Pinout & Package
ISL8088IRZ-T7A is housed in a RoHS-compliant, Pb-free 10-lead 3mm×3mm DFN package (pkg drawing L10.3x3C) with an exposed thermal pad (PD) that must be soldered to PGND for electrical integrity and optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 / FB2 | Channel 1 / Channel 2 feedback input | Negative input to transconductance error amplifier; sets output voltage via external resistor divider referenced to 0.6V internal bandgap. |
| EN1 / EN2 | Channel 1 / Channel 2 enable input | Active-high logic control; enables output and initiates soft-start when high; discharges output capacitor when low. |
| VIN | Main input supply | Accepts 2.75V–5.5V; requires local 10µF ceramic decoupling to PGND to suppress high-frequency switching noise. |
| LX1 / LX2 | Channel 1 / Channel 2 switch node | Connects to inductor terminal; carries high di/dt switching current; layout requires short, low-inductance routing to minimize EMI. |
| SYNC | Mode selection & sync input | Logic-level pin: GND = forced PWM; VIN = PFM; external clock (≤4MHz, negative edge) = synchronization source. |
| PG | Power-good open-drain output | 1ms-delayed active-low signal indicating both outputs are within ±8% of nominal; includes internal 1MΩ pull-up. |
| NC | No-connect | Internally unused; recommended to connect to exposed pad (PGND) for mechanical stability and thermal conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Internal digital soft-start | 2ms ramp time - prevents inrush current into downstream capacitance during power-up, eliminating need for external soft-start circuitry. |
| Soft-stop output discharge | 100Ω internal discharge switch - safely bleeds stored energy from output capacitors during shutdown, preventing backfeeding or latch-up in multi-rail systems. |
| 100% duty-cycle operation | Enables dropout as low as IOUT × RDS(on) (P-MOSFET) - maximizes usable battery voltage range in single-cell Li+ applications. |
| Start-up with pre-biased output | Supports powered-up downstream rails - avoids reverse current flow during sequencing, critical for hot-swap or modular power architectures. |
| Overcurrent protection | Peak current limit of 1.2A (typ) per channel with cycle-by-cycle limiting - protects MOSFETs and inductors during short-circuit or overload events. |
Applications
| Microcontroller Core Power | FPGA I/O Bank Supply |
|---|---|
|
Use Scenario: Providing clean, regulated 1.8V and 2.5V rails to an ARM Cortex-M7 MCU with multiple peripherals and internal SRAM. IC Role / Device Role / Timing Role: Dual-channel POL regulator delivering independent, sequenced outputs with synchronized soft-start and coordinated PG assertion. Use Value: Eliminates need for discrete LDOs or second-stage converters; 2.25MHz switching enables <1.8cm² solution size on dense IoT node PCBs. |
Use Scenario: Powering configurable I/O banks of a Xilinx Artix-7 FPGA where voltage levels vary by interface standard (LVCMOS, SSTL, HSTL). IC Role / Device Role / Timing Role: Dual-output buck converter supporting independent voltage programming via FB1/FB2 dividers and individual EN control for bank-level power gating. Use Value: Reduces BOM count vs. two single-channel regulators; PFM mode extends battery life during idle periods between configuration updates. |
| Barcode Scanner Module | Portable Test Instrumentation |
|
Use Scenario: Compact handheld barcode reader powered by single Li-ion cell requiring 3.3V for imaging sensor and 1.2V for ASIC processing core. IC Role / Device Role / Timing Role: High-efficiency dual buck regulator operating from 2.75V–4.2V input, maintaining regulation through full battery discharge curve. Use Value: 30µA PFM quiescent current extends standby time beyond 30 days; 100% duty cycle sustains 3.3V output until battery drops below 3.4V. |
Use Scenario: Battery-powered handheld oscilloscope with analog front-end, ADC, and display requiring isolated, low-noise 5V, 3.3V, and 1.8V supplies. IC Role / Device Role / Timing Role: Primary POL regulator generating 3.3V/1.8V pair; forced PWM mode selected to avoid beat frequencies with sensitive analog sampling clocks. Use Value: 2.25MHz fixed frequency simplifies EMI filtering; PG signal coordinates system initialization with FPGA configuration and ADC calibration routines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62400DRVR | 2.25MHz switching, 600mA per channel, 0.6V reference, but lacks SYNC pin and external synchronization capability. | Not suitable for systems requiring EMI-controlled fixed-frequency operation or multi-device clock alignment. | Choose when cost sensitivity outweighs need for sync or higher current; verify thermal margin at 800mA due to lower rated output. |
| RTQ2132BGQW | 3MHz switching, 1A per channel, integrated compensation, but only supports forced PWM mode - no PFM/low-IQ option. | Higher efficiency at heavy loads, but 25µA shutdown current vs. ISL8088IRZ-T7A's 6.5µA limits ultra-low-power standby use cases. | Prefer for high-performance, thermally constrained designs where light-load efficiency is secondary to peak output capability. |
Compared with TPS62400DRVR and RTQ2132BGQW, the ISL8088IRZ-T7A uniquely balances ultra-low 30µA PFM quiescent current, 4MHz sync capability, and 800mA per channel in a 3mm×3mm footprint - making it optimal for battery-powered systems demanding both runtime and EMI control.
Availability
ISL8088IRZ-T7A is available at Aetrix Electronics and suitable for microcontroller power, FPGA I/O supply, and portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8088IRZ-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 acquired Intersil in 2017 and maintains full technical and manufacturing continuity for the ISL8088 product family. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and IoT markets.
The ISL8088 belongs to Renesas' high-efficiency DC/DC regulator portfolio designed specifically for space-constrained, battery-powered applications requiring dual-rail POL conversion with minimal external components and robust protection features.
FAQ
What is the minimum input voltage required for the ISL8088IRZ-T7A to regulate a 1.8V output?
The ISL8088IRZ-T7A has a 2.75V minimum input voltage specification under recommended operating conditions. At light loads and with 100% duty cycle enabled, it can sustain regulation down to VOUT + IOUT × RDS(on), but reliable startup and full-load operation require VIN ≥ 2.75V. For a 1.8V output, this means the device cannot operate from a single NiMH cell (1.2V nominal) without pre-regulation.
Does the ISL8088IRZ-T7A support independent voltage programming for each channel?
Yes, the ISL8088IRZ-T7A supports fully independent voltage programming via separate FB1 and FB2 pins. Each feedback node connects to its own resistor divider network referenced to the internal 0.6V bandgap, enabling different output voltages (e.g., 1.8V on Channel 1 and 2.5V on Channel 2) without cross-coupling or shared components.
How does the ISL8088IRZ-T7A handle power sequencing between its two outputs?
The ISL8088IRZ-T7A provides independent EN1 and EN2 pins, allowing precise control over turn-on and turn-off timing of each channel. Combined with internal 2ms digital soft-start and a shared PG output that monitors both rails, it supports flexible sequencing - such as powering core logic before I/O banks - without external timers or supervisors.
Can the ISL8088IRZ-T7A be synchronized to an external clock source?
Yes, the ISL8088IRZ-T7A accepts an external clock signal on the SYNC pin, supporting synchronization up to 4MHz with negative-edge triggering. This feature eliminates beat frequencies in multi-converter systems and enables deterministic EMI reduction - a capability not found in many competing dual-buck regulators.
What protection features are integrated into the ISL8088IRZ-T7A?
The ISL8088IRZ-T7A integrates overcurrent protection (1.2A peak limit per channel), thermal shutdown (150°C with 25°C hysteresis), input undervoltage lockout (2.75V rising threshold), soft-stop output discharge (100Ω internal switch), and power-good monitoring with 1ms delay. All protections operate autonomously without external components.
ISL8088IRZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.75V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 800mA
- Frequency - Switching:
- 2.25MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
ISL8088IRZ-T7A FAQ
1.How can I place an order for ISL8088IRZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8088IRZ-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 ISL8088IRZ-T7A reliable?
The price and inventory of ISL8088IRZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8088IRZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8088IRZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8088IRZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8088IRZ-T7A?
ISL8088IRZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8088IRZ-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 ISL8088IRZ-T7A?
For technical support, including ISL8088IRZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8088IRZ-T7A requirements.
6.How does Aetrix verify that ISL8088IRZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8088IRZ-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 ISL8088IRZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8088IRZ-T7A?
All ISL8088IRZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8088IRZ-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 ISL8088IRZ-T7A part is unused and in its original packaging.
Return procedure for ISL8088IRZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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