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Renesas ISL80020AFRZ-T
- Part No.:
- ISL80020AFRZ-T
- Manufacturer:
- Renesas
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
ISL80020AFRZ-T.pdf
- Description:
- IC REG BUCK ADJ 1.5A 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,125
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Product details
Overview
ISL80020AFRZ-T from Renesas (formerly Intersil) is a monolithic synchronous buck DC/DC converter delivering up to 2A continuous output current from a 2.7V–5.5V input, operating at 2MHz switching frequency with 0.6V feedback reference and integrated PMOS/NMOS power stage. It enables compact point-of-load regulation in space-constrained industrial and telecom systems.
For engineers reviewing the ISL80020AFRZ-T datasheet, ISL80020AFRZ-T pinout, ISL80020AFRZ-T application, or ISL80020AFRZ-T equivalent, key selection criteria include its -40°C to +125°C operating junction temperature, 100% duty-cycle capability at 1MHz (not 2MHz), absence of boot capacitor requirement due to PMOS high-side switch, and thermal shutdown at +150°C with +25°C hysteresis.
Technical Context
The ISL80020AFRZ-T employs peak current-mode PWM control with internal slope compensation (900mV/Ts) and a transconductance error amplifier (40µA/V) clamped at 1.6V output. Its 2MHz fixed-frequency operation supports fast transient response and small external inductors (e.g., 1.2µH for 3.3VOUT).
It integrates low-rDS(ON) MOSFETs (117mΩ PMOS / 86mΩ NMOS at VIN=5V), eliminates boot capacitor needs via PMOS high-side architecture, and provides comprehensive protection including overcurrent (3.18A typical peak limit), short-circuit (VFB < 0.3V triggers 1/3-frequency mode), negative current detection (-1.5A valley over 2 cycles), and thermal shutdown with hysteresis.
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 rails without external LDO pre-regulation. |
| IOUT Max | 2A continuous - sufficient for FPGA I/O banks, microcontroller cores, and DSP peripherals. |
| fSW | 2MHz nominal - enables use of sub-2.2µH inductors and reduces output ripple without increasing EMI filtering complexity. |
| VFB Reference | 0.600V ±6mV - sets output voltage via resistor divider; allows precise 0.8V–5.5V programmability with minimal external components. |
| Thermal Shutdown | +150°C activation with +25°C hysteresis - ensures safe recovery after overload or poor heatsinking without latch-up. |
| Efficiency Peak | Up to 95% - achieved at mid-load (e.g., 1.2A @ 1.8VOUT, VIN=3.3V, fSW=2MHz), minimizing thermal stress in sealed enclosures. |
| PG Delay | 0.5–2.5ms rising edge - provides stable power-good assertion after soft-start completes, enabling sequenced system startup. |
Pinout & Package
ISL80020AFRZ-T uses an 8-pin 2mm×2mm TDFN package with exposed thermal pad (EPAD) connected to PGND. The package occupies <64mm² board area and requires ≥4 vias under EPAD for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input power supply rail | Supplies both power stage and internal bias regulator; requires ≥10µF ceramic decoupling placed adjacent to pin. |
| EN | Enable control input | Active-high logic (1.4V threshold); pulls PHASE low via 100Ω when disabled to discharge output. |
| SGND | Signal ground reference | Must be tied directly to EPAD; separates analog sensing from noisy power return paths. |
| PG | Power-good status output | Open-drain with 5MΩ internal pull-up; asserts high only after soft-start and when VOUT stays within ±15% of regulation. |
| FB | Feedback node for voltage regulation | Connects to resistor divider; monitors output via error amplifier; also used by UV/OV protection comparators. |
| NC | No-connect terminal | Internally unconnected; must be tied to EPAD for mechanical stability and thermal conduction. |
| PGND | Power and analog ground return | Main ground plane connection point; ties to EPAD and all capacitors' ground terminals to minimize loop inductance. |
| PHASE | Switching node | Connects to inductor; carries high di/dt current; requires short, wide trace routing away from sensitive analog traces. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS high-side switch | Eliminates boot capacitor requirement, reducing BOM count and layout complexity in ultra-compact designs. |
| Internal soft-start | Fixed 1ms ramp time prevents inrush current into output capacitors during power-up, avoiding input rail droop. |
| Negative current protection | Detects -1.5A valley current across NMOS for two consecutive cycles, then disables both FETs to prevent reverse conduction damage. |
| 100% duty cycle support | Enables dropout operation down to VOUT ≈ VIN – losses (e.g., 3.3VOUT from 3.6VIN), critical for battery-powered brownout resilience. |
| Integrated compensation | 27pF/200kΩ RC network eliminates need for external compensation components, simplifying design validation. |
Applications
| Industrial Sensor Node | Telecom Line Card |
|---|---|
Use Scenario: Powering 3.3V microcontroller, RS-485 transceiver, and analog front-end in a DIN-rail mounted environmental sensor. IC Role / Device Role / Timing Role: Primary POL regulator converting 5V backplane supply to stable 3.3V with fast load-step response to handle bursty wireless transmission. Use Value: 2MHz operation allows 1.5µH inductor and 22µF X5R ceramic output cap, fitting entire power stage within 8mm² PCB area while maintaining <±2% regulation across -40°C to +85°C ambient. | Use Scenario: Generating 1.2V core supply for FPGA on a high-density optical line card with strict EMI limits. IC Role / Device Role / Timing Role: High-efficiency buck converter operating at 2MHz to shift noise spectrum above sensitive 1–2GHz RF bands and reduce filter component size. Use Value: 95% peak efficiency at 1.5A reduces heat dissipation in air-cooled chassis; PG signal synchronizes FPGA configuration with power rail stability. |
| Medical Point-of-Care Monitor | Automotive Infotainment Head Unit |
Use Scenario: Supplying 1.8V to ADC and 2.5V to precision op-amps in portable ultrasound imaging module. IC Role / Device Role / Timing Role: Dual-output capable via separate FB networks; delivers clean, low-noise rails with <10mVpp ripple at full load. Use Value: Internal slope compensation and current-mode control ensure stable operation with ceramic output caps, eliminating electrolytic aging concerns in field-deployed devices. | Use Scenario: Regulating 5V USB host port and 3.3V SoC I/O from 12V automotive battery via intermediate 5V rail. IC Role / Device Role / Timing Role: Secondary buck converter handling cold-crank (4.5V min) and load-dump (28V max) transients via robust UVLO (2.7V rising) and thermal protection. Use Value: -40°C to +125°C operating range and 150°C thermal shutdown meet AEC-Q200 stress requirements without derating at 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62864DRLR | 2A, 2.5MHz, 2.7–6V input, 0.6V VFB, but requires external boot capacitor and has no 100% duty cycle mode. | Higher fSW improves light-load efficiency but increases EMI filtering burden; lacks integrated thermal hysteresis. | Prefer ISL80020AFRZ-T where boot capacitor elimination, 100% duty cycle, or guaranteed thermal hysteresis are required. |
| MP2143GJ-Z | 2A, 2MHz, 2.5–5.5V input, 0.6V VFB, but uses NMOS high-side requiring boot cap and offers only 120°C thermal shutdown (no hysteresis). | Lower VIN min suits single-cell LiFePO₄, but reduced thermal margin limits use in sealed enclosures above 70°C ambient. | Choose ISL80020AFRZ-T for extended temperature reliability, PMOS simplicity, and deterministic thermal recovery behavior. |
Compared with TPS62864DRLR and MP2143GJ-Z, the ISL80020AFRZ-T uniquely combines PMOS high-side architecture (no boot cap), 100% duty cycle capability, and thermal shutdown with +25°C hysteresis-enabling robust, maintenance-free operation in thermally constrained industrial and medical environments.
Availability
ISL80020AFRZ-T is available at Aetrix Electronics and suitable for industrial sensor nodes, telecom line cards, medical point-of-care monitors, and automotive infotainment head units requiring stable component supply across extended temperature ranges.
Supply support for ISL80020AFRZ-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 its high-performance analog and power management portfolio for industrial, automotive, and communications markets.
The ISL80020AFRZ-T belongs to Renesas' compact synchronous buck converter family designed for space-constrained, high-reliability point-of-load applications demanding wide input range, extended temperature operation, and minimal external components.
FAQ
What is the maximum ambient temperature at which ISL80020AFRZ-T can deliver full 2A output current?
The ISL80020AFRZ-T delivers full 2A output current up to +85°C ambient when properly heatsinked via its EPAD, based on thermal derating curves in the datasheet. Above +85°C, output current must be reduced to maintain junction temperature ≤+125°C, with complete shutdown occurring at +150°C. The device's θJA of 71°C/W and θJC of 7°C/W define its thermal limits under specific PCB layouts.
Does ISL80020AFRZ-T require an external boot capacitor?
No, the ISL80020AFRZ-T does not require an external boot capacitor because it uses a PMOS high-side MOSFET instead of an NMOS. This architecture eliminates the need for charge-pump or bootstrap circuitry, reducing component count and layout complexity. The datasheet explicitly states this advantage as a key differentiator versus NMOS-based buck controllers.
What is the function of the NC pin on ISL80020AFRZ-T, and how should it be connected?
The NC pin (Pin 2) on ISL80020AFRZ-T is internally unconnected but must be soldered to the EPAD (exposed thermal pad) for mechanical stability and improved thermal conduction. The datasheet mandates this connection to ensure proper electrical performance and optimal thermal resistance (θJC = 7°C/W). Leaving it floating may compromise thermal reliability and long-term solder joint integrity.
How does the power-good (PG) signal behave during ISL80020AFRZ-T startup and fault conditions?
The PG pin on ISL80020AFRZ-T remains low during soft-start (1ms duration) and whenever VFB falls below 85% or rises above 115% of 0.6V. It transitions high-impedance only after soft-start completes and VOUT stabilizes within regulation. An internal 5MΩ pull-up ensures compatibility with most logic interfaces, and faults like overtemperature or overcurrent force PG low until the condition clears and soft-start reinitiates.
Can ISL80020AFRZ-T operate at 100% duty cycle, and under what conditions?
Yes, the ISL80020AFRZ-T supports 100% duty cycle operation-but only at its 1MHz variant (ISL80020FRZ-T), not at 2MHz. The ISL80020AFRZ-T is rated for 2MHz operation and does not guarantee 100% duty cycle; attempting it risks instability or failure to regulate. Datasheet Table 1 and functional description confirm 100% duty cycle applies exclusively to 1MHz versions (ISL80020/ISL80015), not the 'A' suffix 2MHz variants like ISL80020AFRZ-T.
ISL80020AFRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-WFDFN 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):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN-EP (2x2)
ISL80020AFRZ-T FAQ
1.How can I place an order for ISL80020AFRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL80020AFRZ-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 ISL80020AFRZ-T reliable?
The price and inventory of ISL80020AFRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL80020AFRZ-T is usually 5 days.
3.What payment methods are accepted for ISL80020AFRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL80020AFRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL80020AFRZ-T?
ISL80020AFRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL80020AFRZ-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 ISL80020AFRZ-T?
For technical support, including ISL80020AFRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL80020AFRZ-T requirements.
6.How does Aetrix verify that ISL80020AFRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL80020AFRZ-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 ISL80020AFRZ-T meets industry standards.
7.What is the process for return or replacement of ISL80020AFRZ-T?
All ISL80020AFRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL80020AFRZ-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 ISL80020AFRZ-T part is unused and in its original packaging.
Return procedure for ISL80020AFRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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