My Inquiry
My Account
Renesas ISL8088IRZ-T
- Part No.:
- ISL8088IRZ-T
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL8088IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 800MA DL 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,092
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL8088IRZ-T 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 reference voltage, and selectable forced PWM or PFM mode operation. It supports input voltages from 2.75V to 5.5V and enables compact power delivery for battery-powered microprocessor cores.
For engineers reviewing the ISL8088IRZ-T datasheet, ISL8088IRZ-T pinout, ISL8088IRZ-T application, or ISL8088IRZ-T equivalent, key selection considerations include its 3mm×3mm 10-lead DFN package, 30µA light-load quiescent current in PFM mode, dual-channel independent enable control (EN1/EN2), and 1ms Power-Good monitoring of both outputs.
Technical Context
The ISL8088IRZ-T employs current-mode PWM control with internal slope compensation and transconductance error amplifiers, enabling fast transient response and stable loop behavior across load and line variations. Its dual-channel architecture operates in-phase with independent feedback (FB1/FB2) and enable (EN1/EN2) inputs.
It integrates P-channel and N-channel MOSFETs with typical 180mΩ on-resistance each, supports external synchronization up to 4MHz via the SYNC pin, and features soft-start (2ms ramp), output discharge during shutdown (100Ω internal switch), and thermal shutdown at +150°C with 25°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current per Channel | 800mA continuous - supports dual-core µC/FPGA rail generation without external current boosting. |
| Switching Frequency | 2.25MHz (typical) - enables use of small 2.2µH inductors and 10µF ceramic output capacitors, minimizing board area. |
| Quiescent Current (PFM) | 30µA total for both channels - extends battery life in always-on low-power states. |
| Feedback Reference Voltage | 0.6V ±10mV - sets precise output regulation down to 0.6V with external resistor divider scaling. |
| Power-Good Delay | 1ms rising-edge delay - provides reliable system reset timing after both outputs stabilize within regulation. |
| Input Voltage Range | 2.75V to 5.5V - compatible with single Li+ cell (fully charged to 4.2V), three NiMH cells, or regulated 5V rails. |
| Thermal Shutdown Threshold | +150°C with +130°C restart - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
ISL8088IRZ-T is housed in a 3mm × 3mm, 10-lead DFN package with exposed thermal pad (PD) requiring connection to PGND via multiple vias for optimal thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB1 | Channel 1 feedback input | Negative input to transconductance error amplifier; sets VOUT1 via resistor divider referenced to 0.6V internal bandgap. |
| EN1 | Channel 1 enable | Active-high logic input; enables VOUT1 and initiates soft-start when high, discharges output capacitor when low. |
| VIN | Main input supply | Accepts 2.75V–5.5V; requires 10µF ceramic decoupling to PGND close to pin. |
| LX1 | Channel 1 switch node | Connects to inductor terminal; carries high-frequency pulsed current from integrated P/N-MOSFET pair. |
| NC | No-connect | Internally unused; recommended to connect to exposed pad (PD) for mechanical/thermal integrity. |
| SYNC | Mode selection/synchronization | Logic-level input: GND = forced PWM; VIN = PFM; external clock edge-triggered = sync up to 4MHz. |
| LX2 | Channel 2 switch node | Identical function to LX1 for second channel; supports independent inductor placement. |
| PG | Power-Good open-drain output | 1ms-delayed active-low signal indicating both VOUT1 and VOUT2 are within ±8% of nominal; includes 1MΩ internal pull-up. |
| EN2 | Channel 2 enable | Independent active-high control for VOUT2; allows staggered power sequencing or selective channel disable. |
| FB2 | Channel 2 feedback input | Same function as FB1 for VOUT2; supports independent output voltage programming (e.g., 2.5V + 1.8V). |
Key Features
| Feature | Design Value |
|---|---|
| 100% duty-cycle operation | Enables ultra-low dropout during battery brownout - maintains regulation until VIN drops below VOUT + ILOAD × RDS(on). |
| Internal digital soft-start | 2ms controlled voltage ramp prevents inrush current and stabilizes startup into pre-biased loads. |
| Soft-stop output discharge | 100Ω internal switch actively discharges output capacitors during shutdown - eliminates residual voltage holdup. |
| Selectably synchronized operation | SYNC pin accepts external clock up to 4MHz - eliminates beat frequencies in multi-regulator systems. |
| Start-up with pre-biased output | Supports hot-swap and rail-sharing applications by safely ramping from non-zero initial output voltage. |
Applications
| Microcontroller Core Supply | FPGA I/O Bank Regulation |
|---|---|
Use Scenario: Powering ARM Cortex-M or RISC-V MCU cores requiring tightly regulated 1.2V/1.8V rails with fast load transient response. IC Role / Device Role / Timing Role: Dual-channel buck regulator providing independent, sequenced 800mA outputs with 1ms PG assertion for reset coordination. Use Value: 2.25MHz switching minimizes inductor size; 30µA PFM quiescent current extends sleep-mode battery life in portable sensors. | Use Scenario: Delivering configurable 1.2V, 1.8V, or 2.5V to FPGA I/O banks with independent enable control for partial reconfiguration. IC Role / Device Role / Timing Role: Dual synchronous buck converter with EN1/EN2 pins enabling dynamic power gating of I/O banks during low-activity periods. Use Value: Internal 100Ω discharge switch ensures rapid rail collapse (<10ms) after disable, preventing latch-up during bank reconfiguration. |
| Li-ion Powered Barcode Scanner | Industrial PLC Communication Module |
Use Scenario: Compact, battery-operated handheld scanner needing dual regulated rails (3.3V logic + 2.8V imager) from single-cell Li-ion input. IC Role / Device Role / Timing Role: High-efficiency dual buck regulator supporting 2.75V–4.2V input range and maintaining regulation down to end-of-discharge voltage via 100% duty cycle. Use Value: 3mm×3mm DFN footprint and <1.8cm² total solution area meet stringent space constraints in ergonomic handheld enclosures. | Use Scenario: DIN-rail mounted PLC module requiring robust, low-noise 3.3V and 5V rails for RS-485 transceivers and microcontroller peripherals. IC Role / Device Role / Timing Role: Dual buck regulator with forced PWM mode selection (via SYNC = GND) to suppress EMI in electrically noisy industrial environments. Use Value: 2.25MHz fixed-frequency operation avoids interference with 1–10MHz PLC communication bands; PG output synchronizes firmware initialization. |
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 |
|---|---|---|---|
| TPS65023RSBR | Triple-output PMIC (2 buck + 1 LDO); 600mA per buck; 2.25MHz; no PFM mode; 4×4 QFN-24 | Integrated LDO simplifies auxiliary rail generation but lacks PFM efficiency for ultra-low-power sleep modes | Choose when needing a third regulated rail and board space permits larger 4×4mm package |
| RTQ2132BGQW | Dual 3A buck; 500kHz–2.2MHz adjustable freq; 25µA IQ in auto-mode; 3×3 DFN-10 same footprint | Higher current capability and wider frequency tuning, but no 100% duty cycle or dedicated PG pin | Choose when higher output current or programmable frequency outweighs need for guaranteed brownout regulation and hardware reset signaling |
Compared with TPS65023RSBR and RTQ2132BGQW, the ISL8088IRZ-T uniquely combines dual 800mA channels, 30µA PFM quiescent current, 100% duty cycle, and dedicated 1ms PG in a 3×3mm DFN - making it optimal for space-constrained, battery-sensitive dual-rail systems requiring deterministic power-good timing.
Availability
ISL8088IRZ-T is available at Aetrix Electronics and suitable for portable medical devices, industrial edge controllers, and battery-powered test instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8088IRZ-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 Corporation is a global semiconductor leader delivering trusted embedded design innovation, with origins in Intersil's high-performance analog and power management portfolio.
The ISL8088IRZ-T belongs to Renesas' high-efficiency DC/DC converter product line, designed specifically for space- and power-constrained portable and battery-operated applications requiring dual independent regulated outputs.
FAQ
What is the maximum supported input voltage for the ISL8088IRZ-T?
The ISL8088IRZ-T supports an absolute maximum input voltage of 6.5V for continuous operation and 7V for up to 20ms. Its recommended operating range is 2.75V to 5.5V, making it ideal for single Li+ cells (2.75–4.2V) and regulated 3.3V/5V supplies. Exceeding 5.5V risks violating recommended conditions and may impact reliability or thermal performance.
Does the ISL8088IRZ-T support independent voltage programming for each channel?
Yes, the ISL8088IRZ-T supports fully independent voltage programming via separate feedback networks: FB1 sets VOUT1 and FB2 sets VOUT2, each referenced to the internal 0.6V bandgap. Typical configurations include 2.5V/1.8V, 3.3V/1.2V, or identical rails. Resistor dividers must be selected to ensure FB voltage remains within –0.3V to +2.7V under all operating conditions.
How does the ISL8088IRZ-T handle output short-circuit conditions?
The ISL8088IRZ-T implements cycle-by-cycle overcurrent protection using internal current sense amplifiers (CSA1/CSA2) monitoring the P-MOSFET current. When sensed current exceeds ~1.2A (typical peak limit), the P-MOSFET is immediately turned off and remains off until the next switching cycle. This limits fault energy and prevents thermal runaway during sustained shorts.
Can the ISL8088IRZ-T operate with pre-biased output capacitors?
Yes, the ISL8088IRZ-T supports start-up with pre-biased outputs - a critical feature for hot-swap and power-redundant systems. In forced PWM mode, it begins soft-start even when VOUT > 0V, ramping the reference while monitoring FB to avoid reverse current flow. This behavior is confirmed in the datasheet's "Soft-Start-Up" section and Figure 26–29 waveforms.
What thermal performance can be expected from the ISL8088IRZ-T in its 3mm×3mm DFN package?
The ISL8088IRZ-T has a typical junction-to-ambient thermal resistance (θJA) of 49°C/W and junction-to-case (θJC) of 4°C/W when mounted on a standard PCB with the exposed pad properly connected to PGND via ≥4 thermal vias. At 800mA per channel and 5V input, power dissipation remains below 0.3W, keeping junction temperature rise under 15°C above ambient under typical layout conditions.
ISL8088IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-T FAQ
1.How can I place an order for ISL8088IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8088IRZ-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 ISL8088IRZ-T reliable?
The price and inventory of ISL8088IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8088IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8088IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8088IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8088IRZ-T?
ISL8088IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8088IRZ-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 ISL8088IRZ-T?
For technical support, including ISL8088IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8088IRZ-T requirements.
6.How does Aetrix verify that ISL8088IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8088IRZ-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 ISL8088IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8088IRZ-T?
All ISL8088IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8088IRZ-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 ISL8088IRZ-T part is unused and in its original packaging.
Return procedure for ISL8088IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL8088IRZ-T 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…
