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Renesas ISL80019IRZ-T7AR5194
- Part No.:
- ISL80019IRZ-T7AR5194
- Manufacturer:
- Renesas
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
ISL80019IRZ-T7AR5194.pdf
- Description:
- IC REG BUCK ADJ 1.5A 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,306
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Product details
Overview
ISL80019IRZ-T7AR5194 from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 1.5A continuous output current from a 2.7V–5.5V input, operating at 1MHz switching frequency with internal compensation and PFM/PWM mode selection. It integrates low-rDS(ON) PMOS/NMOS power switches, eliminates boot capacitor requirement, and supports 100% duty cycle operation for ultra-low dropout (200mV at 2A). It is used in FPGA core voltage regulation and LCD panel power supplies.
For engineers reviewing the ISL80019IRZ-T7AR5194 datasheet, ISL80019IRZ-T7AR5194 pinout, ISL80019IRZ-T7AR5194 application, or ISL80019IRZ-T7AR5194 equivalent, key selection criteria include verified 1.5A/1MHz capability, TDFN-8 2mm×2mm thermal pad package, feedback voltage accuracy of ±0.5% (0.595–0.605V), integrated overcurrent/thermal protection, and support for both light-load PFM efficiency optimization and noise-sensitive PWM operation.
Technical Context
The ISL80019IRZ-T7AR5194 employs peak current-mode control with slope compensation (900mV/Ts) to ensure stability across wide duty-cycle ranges, including 100% conduction at 1MHz. Its architecture integrates a PMOS high-side switch-removing boot capacitor dependency-and an NMOS low-side switch with 86mΩ rDS(ON) at 5V.
It features dual-mode operation: PFM enables ultra-low quiescent current (35µA typical) under light loads, while PWM maintains fixed 1MHz frequency (±15%) for EMI control and transient response. Protection includes cycle-by-cycle overcurrent limiting (2.1–2.9A), thermal shutdown at 150°C with 25°C hysteresis, and VOUT overvoltage/undervoltage monitoring via FB pin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 2.7V to 5.5V - Supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without external LDO pre-regulation. |
| IOUT Max | 1.5A continuous - Verified output capability per Table 1; sufficient for FPGA I/O banks or small-signal processor cores. |
| fSW | 1MHz nominal (850–1150kHz) - Enables use of compact 1.0–3.3µH inductors and reduces EMI fundamental frequency. |
| VFB | 0.600V ±0.005V - Tight reference tolerance ensures ±0.83% output voltage accuracy with standard 1% resistor dividers. |
| Efficiency Peak | Up to 95% - Achieved at mid-load (e.g., 1.2V/1A, 3.3V input, PFM mode), minimizing thermal load in space-constrained PCBs. |
| Dropout | 200mV at 2A - Confirmed 100% duty-cycle operation enables near-input-output regulation in low-VIN scenarios. |
| Quiescent Current | 35µA (PFM, no load) - Extends battery runtime in always-on subsystems like set-top box standby logic. |
Pinout & Package
ISL80019IRZ-T7AR5194 is housed in an 8-pin 2mm×2mm TDFN package with exposed thermal pad (Pin 9), optimized for high-power density and thermal dissipation (θJA = 71°C/W). The package requires soldering the thermal pad to PGND plane via multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input power supply | Bias source for internal LDO and power stage; requires ≥10µF ceramic decoupling placed adjacent to pin. |
| EN (Pin 2) | Enable control | Active-high logic input (1.4V threshold); pulls PHASE low via 100Ω when disabled to discharge output. |
| MODE (Pin 3) | Operating mode select | Tied to VIN for PWM, GND for PFM; internal 1MΩ pull-down prevents floating but external tie-off is mandatory. |
| PG (Pin 4) | Power-good indicator | Open-drain output pulled low during soft-start or if VOUT falls outside 80–120% regulation window. |
| COMP (Pin 5) | Error amplifier output | Internally compensated when tied to VIN; externally compensated with RC network to GND for custom loop tuning. |
| FB (Pin 6) | Voltage feedback input | Connects to resistor divider; sets VOUT = 0.6V × (1 + R1/R2); also used by UVLO/OVP circuits. |
| PGND (Pin 7) | Power/analog ground | Single-point connection to PCB ground plane; critical for noise immunity and current return path integrity. |
| PHASE (Pin 8) | Switching node | Connects directly to inductor; carries high di/dt switching current; discharged via 100Ω when EN = low. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS high-side switch | Eliminates boot capacitor requirement, reducing BOM count and layout complexity. |
| Selectable PFM/PWM mode | Enables >90% efficiency at 1mA load (PFM) and low-noise fixed-frequency operation (PWM) without changing hardware. |
| Internal/external compensation | Default internal RC (27pF/200kΩ) simplifies design; external option allows optimization for diverse output capacitors and load transients. |
| 100% duty-cycle capability | Supports ultra-low dropout operation down to VOUT = VIN − 200mV, critical for battery-powered systems nearing end-of-life voltage. |
| Integrated protection suite | Includes overcurrent (2.5A typ), thermal shutdown (150°C), VIN UVLO (2.7V rising), and VOUT OVP/UVP - reduces need for external supervision ICs. |
Applications
| Application 1 | Application 2 |
|---|---|
Use Scenario: Powering FPGA I/O banks requiring stable 1.8V/1.5A with fast load transient response. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering regulated core voltage with 1MHz switching for minimal inductor size. Use Value: Achieves <1% load regulation error across 0–1.5A (Fig. 12–14) and sub-100µs recovery from 0.5A→1.5A step, ensuring signal integrity in high-speed interfaces. | Use Scenario: Supplying 1.2V to LCD timing controller ICs in portable displays. IC Role / Device Role / Timing Role: Compact DC/DC converter mounted adjacent to display module, operating in PFM mode during screen idle periods. Use Value: 35µA quiescent current extends battery life during display sleep; 2mm×2mm footprint fits tight board real estate behind bezel. |
| Application 3 | Application 4 |
Use Scenario: Generating 0.9V for low-power microcontroller cores in cable modems. IC Role / Device Role / Timing Role: Secondary buck regulator fed from 3.3V rail, configured for PWM mode to avoid audible noise in residential environments. Use Value: Fixed 1MHz operation suppresses interference with DOCSIS upstream frequencies; ±0.5% VFB tolerance ensures reliable brown-out detection. | Use Scenario: Providing 2.5V bias to analog front-end circuitry in set-top box audio subsystems. IC Role / Device Role / Timing Role: Point-of-load regulator with integrated PG flag to sequence power-up with DAC initialization. Use Value: Open-drain PG output synchronizes with system controller reset release; 15µs falling-edge delay prevents false power-good assertion during startup overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL80019AIRZ-T7A | 2MHz switching frequency (vs. 1MHz), same 1.5A rating and package | Better suited for ultra-compact designs needing smallest possible inductor; higher fSW increases switching loss at full load | Select ISL80019AIRZ-T7A only if board area is constrained and thermal margin permits higher core losses. |
| TPS62231DRYT | 1.8V–6.5V input, 1.5A, 3.5MHz fSW, 2.5µA quiescent current, WSON-6 package | Lower IQ enables longer battery life in always-on sensors; smaller package but no thermal pad, limiting power handling | Choose TPS62231DRYT for battery-operated IoT nodes where 1.5A peak is infrequent; avoid for sustained 1.5A loads due to thermal limitations. |
Compared with ISL80019AIRZ-T7A and TPS62231DRYT, the ISL80019IRZ-T7AR5194 offers optimal balance of thermal performance (exposed pad), moderate switching frequency (1MHz), and robust protection-making it preferred for industrial and consumer power rails demanding reliability over minimum size or lowest IQ.
Availability
ISL80019IRZ-T7AR5194 is available at Aetrix Electronics and suitable for FPGA power, LCD panel supplies, cable modem subsystems, and set-top box point-of-load regulation requiring stable component supply and long-term manufacturability.
Supply support for ISL80019IRZ-T7AR5194 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 continues to manufacture and support its high-performance analog and power management portfolio.
The ISL80019IRZ-T7AR5194 belongs to Renesas' compact synchronous buck regulator product line, designed specifically for space-constrained, battery-aware, and thermally sensitive applications in consumer and industrial electronics.
FAQ
What is the maximum continuous output current supported by the ISL80019IRZ-T7AR5194?
The ISL80019IRZ-T7AR5194 supports up to 1.5A continuous output current, as confirmed in Table 1 of the FN7888 datasheet. This rating applies across the full operating temperature range (−40°C to +125°C) and is validated with proper PCB thermal design-including connection of the exposed thermal pad to a solid PGND plane using multiple vias. Exceeding 1.5A may trigger overcurrent protection or thermal shutdown.
Does the ISL80019IRZ-T7AR5194 require an external boot capacitor?
No, the ISL80019IRZ-T7AR5194 does not require an external boot capacitor because it uses a PMOS high-side MOSFET. This architecture eliminates the need for charge-pump or bootstrap circuitry, simplifying the bill of materials and layout. The datasheet explicitly states this advantage on page 1: "since the high-side MOSFET is a PMOS, the need for a Boot capacitor is eliminated."
How does the MODE pin affect the operation of the ISL80019IRZ-T7AR5194?
The MODE pin on the ISL80019IRZ-T7AR5194 selects between PFM (pin grounded) and PWM (pin tied to VIN or logic high ≥2.5V) operation. In PFM mode, the device reduces switching frequency at light loads to minimize quiescent current (35µA typical); in PWM mode, it maintains fixed 1MHz operation for predictable EMI and faster transient response. An internal 1MΩ pull-down prevents floating, but external connection is required for deterministic behavior.
What is the feedback reference voltage (VFB) accuracy of the ISL80019IRZ-T7AR5194?
The ISL80019IRZ-T7AR5194 has a feedback reference voltage VFB of 0.600V with a tolerance of ±0.005V (0.595V to 0.605V) at +25°C, and ±0.016V (0.589V to 0.605V) over −40°C to +125°C. This tight tolerance enables precise output voltage setting using standard 1% resistors and ensures stable regulation even under varying thermal and load conditions, as specified in the Electrical Specifications table on page 7 of FN7888.
Can the ISL80019IRZ-T7AR5194 operate with 100% duty cycle, and under what conditions?
Yes, the ISL80019IRZ-T7AR5194 supports 100% duty cycle operation-but only in the 1MHz version (which includes ISL80019IRZ-T7AR5194). This enables ultra-low dropout regulation, delivering up to 200mV dropout at 2A output current. Operation at 100% duty cycle requires the device to be configured for 1MHz (not 2MHz), with appropriate input voltage headroom and thermal management to sustain continuous conduction without triggering thermal shutdown.
ISL80019IRZ-T7AR5194 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
ISL80019IRZ-T7AR5194 FAQ
1.How can I place an order for ISL80019IRZ-T7AR5194 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL80019IRZ-T7AR5194 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 ISL80019IRZ-T7AR5194 reliable?
The price and inventory of ISL80019IRZ-T7AR5194 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL80019IRZ-T7AR5194 is usually 5 days.
3.What payment methods are accepted for ISL80019IRZ-T7AR5194?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL80019IRZ-T7AR5194 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL80019IRZ-T7AR5194?
ISL80019IRZ-T7AR5194 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL80019IRZ-T7AR5194 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 ISL80019IRZ-T7AR5194?
For technical support, including ISL80019IRZ-T7AR5194 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL80019IRZ-T7AR5194 requirements.
6.How does Aetrix verify that ISL80019IRZ-T7AR5194 is sourced from the original manufacturer or authorized distributors?
All ISL80019IRZ-T7AR5194 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 ISL80019IRZ-T7AR5194 meets industry standards.
7.What is the process for return or replacement of ISL80019IRZ-T7AR5194?
All ISL80019IRZ-T7AR5194 units undergo pre-shipment inspection (PSI). If there is an issue with ISL80019IRZ-T7AR5194, 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 ISL80019IRZ-T7AR5194 part is unused and in its original packaging.
Return procedure for ISL80019IRZ-T7AR5194:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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