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Renesas ISL80031AFRZ-T
- Part No.:
- ISL80031AFRZ-T
- Manufacturer:
- Renesas
- Package:
- 8-VFDFN Exposed Pad
- Datasheet:
-
ISL80031AFRZ-T.pdf
- Description:
- IC REG BUCK ADJ 3A 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,910
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Product details
Overview
ISL80031AFRZ-T from Renesas (formerly Intersil) is a monolithic synchronous buck DC/DC converter optimized for high-efficiency, low-quiescent-current power delivery in space-constrained applications. It delivers up to 3A continuous output current from a 2.7V–5.5V input, operates at 2MHz switching frequency in PFM mode, achieves 35µA quiescent current, and integrates PMOS/NMOS power stages with 100% duty cycle capability-enabling use in battery-powered instrumentation and POL supplies.
For engineers reviewing the ISL80031AFRZ-T datasheet, ISL80031AFRZ-T pinout, ISL80031AFRZ-T application, or ISL80031AFRZ-T equivalent, key selection criteria include its PFM light-load efficiency, absence of boot capacitor requirement (due to integrated PMOS high-side switch), thermal shutdown at +150°C, 0.6V feedback reference, and compatibility with compact 2mm×2mm DFN layouts requiring minimal external components.
Technical Context
The ISL80031AFRZ-T implements pulse-frequency modulation (PFM) with zero-cross detection and an 16-cycle skip counter to minimize switching losses below ~450mA load. Its peak current-mode control uses slope compensation (900mV/Ts) and a transconductance error amplifier (40µA/V) with internal 27pF/200kΩ compensation.
Protection architecture includes overcurrent limiting (4.5A typical peak), negative current shutdown (−2A threshold), short-circuit detection via VFB < 0.3V, and thermal shutdown with 25°C hysteresis. The 0.6V feedback reference is trimmed to ±1% over −40°C to +125°C, supporting precise output regulation across industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion, USB, and 3.3V/5V rail inputs without external regulators. |
| Max Output Current | 3A continuous - enables direct powering of FPGA I/O banks, microcontroller cores, or ASIC subsystems. |
| Switching Frequency | 2MHz - allows use of sub-2.2µH inductors and reduces EMI filter size in compact PCB layouts. |
| Quiescent Current | 35µA - extends battery life in always-on sensor nodes and portable medical devices. |
| Feedback Reference | 0.600V ±1% - enables accurate output voltage setting (e.g., 1.2V, 1.8V, 2.5V) using standard resistor dividers. |
| Thermal Shutdown | +150°C with 25°C hysteresis - provides robust protection during sustained overload or poor heatsinking. |
| Package | 8-pin 2mm×2mm DFN with exposed pad - delivers θJC = 7°C/W for efficient heat transfer to PCB ground plane. |
Pinout & Package
ISL80031AFRZ-T is housed in an 8-lead 2mm×2mm DFN package with exposed thermal pad (EPAD) that must be soldered to PGND for electrical integrity and thermal performance. The package footprint occupies <64mm² and supports reflow per IPC/JEDEC J-STD-020 MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pins 1,2) | Input power supply | Supplies both power stage and internal LDO; requires ≥10µF ceramic decoupling placed adjacent to pins. |
| EN (Pin 3) | Enable control input | Active-high logic: device enabled when >1.4V; pulled low disables regulator and discharges output via 100Ω PHASE path. |
| PG (Pin 4) | Power-good open-drain output | Asserts low during soft-start or if VOUT falls outside 85–117% regulation window; includes 5MΩ internal pull-up. |
| FB (Pin 5) | Feedback node | Connects to resistor divider; error amplifier compares this to 0.6V reference to regulate output voltage. |
| PGND (Pins 6,7) | Power and analog ground | Must connect directly to PCB ground plane; shared return for input/output capacitors and inductor. |
| PHASE (Pin 8) | Switching node | Drives external inductor; discharged by 100Ω resistor during shutdown to prevent output voltage hold-up. |
| EPAD | Exposed thermal pad | Electrically tied to PGND; requires multiple vias to inner ground layers for optimal thermal conduction. |
Key Features
| Feature | Design Value |
|---|---|
| PMOS high-side switch | Eliminates need for boot capacitor, reducing BOM count and layout complexity in ultra-compact designs. |
| PFM light-load operation | Maintains >85% efficiency at 10mA load (VIN=3.3V, VOUT=1.8V), critical for intermittent-sensing applications. |
| 100% duty cycle support | Enables dropout operation down to VIN ≈ VOUT, extending runtime in battery discharge scenarios. |
| Integrated soft-start/soft-stop | Controls output ramp rate (0.39–1.36ms) and prevents inrush current; discharges output safely on disable. |
| Robust protection suite | Includes OCP (4.5A), SCP (VFB<0.3V), thermal shutdown (+150°C), UVLO (2.7V), and negative current limit (−2A). |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
|
Use Scenario: Battery-powered wireless temperature/humidity sensor with BLE radio and low-power MCU. IC Role / Device Role / Timing Role: Primary POL regulator supplying 1.8V to MCU core and 3.3V to RF transceiver via resistive divider. Use Value: 35µA quiescent current extends 2xAA battery life beyond 2 years; 2MHz switching enables 1.5µH inductor and <30mm² total solution area. |
Use Scenario: Handheld ECG device requiring stable, low-noise analog front-end and digital processing rails. IC Role / Device Role / Timing Role: Supplies clean 2.5V analog rail and 1.2V digital rail from single 3.7V Li-ion cell. Use Value: PFM mode minimizes switching noise near sensitive analog circuitry; 0.6V reference ensures <±1.5% output accuracy over temperature. |
| Telecom SFP+ Module | Gaming Peripheral Controller |
|
Use Scenario: Small-form-factor pluggable transceiver requiring regulated 3.3V from host board's 5V supply. IC Role / Device Role / Timing Role: Compact step-down converter replacing discrete buck controller + MOSFETs in tight module envelope. Use Value: 2mm×2mm DFN package fits within SFP+ mechanical constraints; 100% duty cycle maintains regulation as input drops to 3.6V. |
Use Scenario: RGB lighting controller IC in gaming mouse requiring dynamic voltage scaling for LED brightness control. IC Role / Device Role / Timing Role: Adjustable output buck regulator (via FB divider) delivering 1.2V–5.0V to LED driver IC based on firmware command. Use Value: Fast transient response (<10µs recovery) handles rapid LED current changes; EN pin enables firmware-controlled power gating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DRVR | 2.7V–6.5V input, 1.8A max, 1.8MHz PFM, 300nA IQ, 1.2mm×0.8mm WCSP | Lower current rating and smaller package; better for ultra-low-IQ wearables but insufficient for 3A loads. | Select when <2A output and sub-1µA quiescent current are mandatory; not suitable for ISL80031AFRZ-T's 3A requirement. |
| MP2152GQZ-P | 2.5V–5.5V input, 3A max, 2MHz PWM/PFM, 22µA IQ, 2mm×2mm QFN | Uses PWM/PFM auto-mode instead of fixed PFM; higher light-load IQ than ISL80031AFRZ-T (22µA vs 35µA). | Choose for applications needing seamless transition between PWM and PFM modes; identical 3A/2MHz capability but different control strategy. |
Compared with TPS62840DRVR and MP2152GQZ-P, the ISL80031AFRZ-T offers guaranteed 3A output with fixed PFM operation optimized for predictable light-load efficiency, while retaining the smallest possible footprint among 3A-capable 2MHz converters with integrated PMOS high-side switch.
Availability
ISL80031AFRZ-T is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, telecom SFP+ modules, and gaming peripheral controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ISL80031AFRZ-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 continues to develop and support its high-performance analog and power management portfolio.
The ISL80031AFRZ-T belongs to Renesas' ISL8003x family of monolithic buck converters designed specifically for space- and efficiency-critical point-of-load applications in battery-powered and thermally constrained systems.
FAQ
What is the maximum output current capability of the ISL80031AFRZ-T?
The ISL80031AFRZ-T delivers up to 3A of continuous output current across its full operating temperature range (−40°C to +125°C) when properly heatsinked via the exposed pad to a multi-layer PCB ground plane. Peak current limit is specified at 4.5A typical, providing headroom for transient surges without triggering protection.
Does the ISL80031AFRZ-T require an external boot capacitor?
No, the ISL80031AFRZ-T does not require an external boot capacitor because it integrates a PMOS high-side switch. This eliminates the need for charge-pump circuitry and associated external components, simplifying layout and reducing bill-of-materials cost compared to NMOS-based buck controllers.
What is the feedback reference voltage for the ISL80031AFRZ-T?
The ISL80031AFRZ-T features a precision 0.600V ±1% internal feedback reference voltage (VFB) over −40°C to +125°C. This allows accurate output voltage programming using standard resistor dividers-for example, R1 = 200kΩ and R2 = 100kΩ sets VOUT = 1.8V per the formula VOUT = 0.6 × (1 + R1/R2).
How does the ISL80031AFRZ-T manage efficiency at light loads?
The ISL80031AFRZ-T employs fixed PFM (pulse-frequency modulation) operation, entering skip mode after detecting 16 consecutive zero-crossing cycles in the inductor current. This reduces switching losses dramatically at light loads, achieving >85% efficiency at 10mA output while maintaining 35µA quiescent current.
What protection features are integrated into the ISL80031AFRZ-T?
The ISL80031AFRZ-T integrates overcurrent protection (OCP), short-circuit protection (SCP), negative current protection (NCP), thermal shutdown (+150°C), input undervoltage lockout (UVLO at 2.7V), and output overvoltage/undervoltage monitoring via the PG pin. All protections are fully autonomous and require no external components.
ISL80031AFRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-VFDFN 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:
- 3A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-DFN (2x2)
ISL80031AFRZ-T FAQ
1.How can I place an order for ISL80031AFRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL80031AFRZ-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 ISL80031AFRZ-T reliable?
The price and inventory of ISL80031AFRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL80031AFRZ-T is usually 5 days.
3.What payment methods are accepted for ISL80031AFRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL80031AFRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL80031AFRZ-T?
ISL80031AFRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL80031AFRZ-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 ISL80031AFRZ-T?
For technical support, including ISL80031AFRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL80031AFRZ-T requirements.
6.How does Aetrix verify that ISL80031AFRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL80031AFRZ-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 ISL80031AFRZ-T meets industry standards.
7.What is the process for return or replacement of ISL80031AFRZ-T?
All ISL80031AFRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL80031AFRZ-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 ISL80031AFRZ-T part is unused and in its original packaging.
Return procedure for ISL80031AFRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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