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Renesas ISL80101AIRAJZ-T
- Part No.:
- ISL80101AIRAJZ-T
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL80101AIRAJZ-T.pdf
- Description:
- IC REG LINEAR POS ADJ 1A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,929
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Product details
Overview
ISL80101AIRAJZ-T from Renesas Electronics is a high-performance 1A low-dropout linear regulator with programmable current limiting, ±2% VADJ accuracy over -40°C to +125°C, 212mV dropout at 1A/4.5V, and integrated power-good (PG) output. It operates from 2.2V to 6V input and delivers adjustable 0.8V–5.0V output voltage, supporting USB devices and telecom power rails requiring tight regulation and fast transient response.
For engineers reviewing the ISL80101AIRAJZ-T datasheet, ISL80101AIRAJZ-T pinout, ISL80101AIRAJZ-T application, or ISL80101AIRAJZ-T equivalent, key selection criteria include its programmable 1.62A default current limit, 100µVRMS output noise, soft-start via external capacitor, thermal shutdown at 160°C, and compatibility with X5R/X7R ceramic capacitors ≥10µF on input and output.
Technical Context
The ISL80101AIRAJZ-T employs a submicron BiCMOS process to achieve low quiescent current versus load while maintaining fast load transient response. Its architecture integrates an adjustable soft-start circuit (via SS pin), enable-controlled shutdown with 12µA quiescent current, and open-drain PG flag asserting low when VOUT drops below 84% of nominal or during current-limit fault.
Current limiting is set by the ISET pin: floating yields 1.62A; grounding via RSET increases limit up to 1.75A; connecting to VIN decreases it per Equation 2. The ADJ pin enables precise feedback-based output voltage programming using resistor dividers, with VADJ = 500mV ±10mV across temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1A continuous; supports peak loads up to 1.62A default current limit without shutdown |
| Dropout Voltage | 212mV at 1A/4.5V input - enables efficient operation in low-VIN applications like battery-powered systems |
| VADJ Accuracy | ±2% over line, load, and -40°C to +125°C - ensures stable output voltage under varying thermal and loading conditions |
| Output Noise | 100µVRMS (300Hz–300kHz) - critical for noise-sensitive analog circuits and RF power supplies |
| PSRR | 48dB at 1kHz and 120Hz - suppresses input ripple in noisy DC-DC converter outputs |
| Thermal Shutdown | 160°C with 30°C hysteresis - protects against sustained overload or poor PCB thermal design |
| Package | 10-lead 3mm × 3mm DFN with exposed thermal pad - requires soldering EPAD to GND plane for θJA = 48°C/W |
Pinout & Package
ISL80101AIRAJZ-T uses a RoHS-compliant 10-lead 3mm × 3mm DFN package (PKG DWG L10.3x3) with exposed thermal pad (EPAD) that must be soldered to the PCB ground plane for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - VOUT | Regulated output node | Must connect ≥10µF X5R/X7R capacitor directly with ≤0.5cm trace length for stability |
| 3 - ADJ | Feedback reference input | Sets output voltage via resistor divider; VADJ = 500mV ±10mV; input bias <1µA |
| 4 - PG | Power-good open-drain flag | Pulls low if VOUT < 84% nominal, current limit trips, or VIN too low; requires external pull-up |
| 5 - GND | Analog and power ground | Common return for all internal circuits; ties to EPAD for thermal path |
| 6 - SS | Soft-start timing control | External capacitor sets output ramp time; internal 2µA current source charges CSS |
| 7 - ENABLE | VIN-independent enable input | TTL/CMOS compatible; 0.8V typical turn-on threshold with 80mV hysteresis |
| 8 - ISET | Current limit configuration | Floating = 1.62A; grounded via RSET increases limit; tied to VIN decreases limit |
| 9, 10 - VIN | Input supply | Accepts 2.2V–6V; requires ≥10µF X5R/X7R input capacitor near pins |
| EPAD | Thermal and electrical ground | Mandatory connection to PCB GND plane via multiple thermal vias for safe power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Programmable current limit | Configurable from ~0.54A to 1.75A via external RSET, improving system reliability during short-circuit events |
| Adjustable soft-start | Controlled by external capacitor on SS pin - prevents inrush current damage to downstream capacitors and MOSFETs |
| Power-good output | Open-drain PG flag provides real-time status of regulation, current limit, and input voltage health for system sequencing |
| Low-noise regulation | 100µVRMS output noise enables clean power for ADCs, PLLs, and RF front-ends without additional filtering |
| Wide input/output range | 2.2V–6V input and 0.8V–5.0V output support diverse rail requirements including USB 3.3V, DDR 1.8V, and FPGA core 1.2V |
Applications
| Telecom Power Rails | Medical Sensor Modules |
|---|---|
Use Scenario: Providing stable 3.3V supply to Ethernet PHYs and optical transceivers in compact routers and switches. IC Role / Device Role / Timing Role: Primary post-regulator delivering low-noise, fast-transient power after a switching DC-DC stage. Use Value: 48dB PSRR at 1kHz suppresses switching ripple from upstream converters; 212mV dropout enables operation from 3.6V Li-ion battery inputs. | Use Scenario: Powering precision analog front-ends and low-power microcontrollers in portable ECG or pulse oximeter units. IC Role / Device Role / Timing Role: Low-noise, thermally robust LDO supplying analog signal chain components. Use Value: 100µVRMS output noise avoids degradation of µV-level biomedical signals; ±2% accuracy ensures calibrated sensor readings across temperature. |
| USB Peripheral Power | Gaming Console Subsystem |
Use Scenario: Regulating 5.0V USB bus voltage down to 1.8V or 2.5V for USB-C controller ICs and Type-C PD logic. IC Role / Device Role / Timing Role: Adjustable-output LDO enabling flexible voltage domain partitioning in USB host controllers. Use Value: ADJ pin allows precise 1.8V/2.5V/3.3V generation from 5V bus; programmable current limit protects against cable shorts. | Use Scenario: Supplying auxiliary 1.2V core voltage to GPU memory interface or audio codec in handheld gaming devices. IC Role / Device Role / Timing Role: Compact, thermally efficient LDO delivering regulated power in space-constrained mobile form factors. Use Value: 3mm × 3mm DFN package with EPAD minimizes board area; 160°C thermal shutdown prevents damage during burst-mode GPU loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TPS7A4700RGWR | Fixed 3.3V output; 1A rating; 4µVRMS noise; no programmable current limit | Better for ultra-low-noise analog rails but lacks adjustability and fault protection flexibility | Choose when lowest possible noise is required and output voltage is fixed |
| Analog Devices ADM7172ACPZ-R7 | 2A rating; 125µVRMS noise; fixed or adjustable versions; no PG output | Higher current capacity suits more demanding loads but omits power-good signaling for system sequencing | Choose when >1A load current is needed and PG flag is not required |
Compared with TPS7A4700RGWR and ADM7172ACPZ-R7, the ISL80101AIRAJZ-T uniquely combines programmable current limiting, power-good output, and adjustable voltage in a 3×3mm DFN - making it optimal for space-constrained, fault-aware embedded systems requiring design flexibility.
Availability
ISL80101AIRAJZ-T is available at Aetrix Electronics and suitable for telecom infrastructure, medical instrumentation, and USB device power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL80101AIRAJZ-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 is a global semiconductor leader delivering high-performance analog, power, and embedded processing solutions for industrial, automotive, and communications markets.
The ISL80101A product line was designed specifically for high-reliability, low-noise point-of-load regulation in space-constrained applications where programmable protection and thermal robustness are critical.
FAQ
What is the default current limit setting for ISL80101AIRAJZ-T?
The ISL80101AIRAJZ-T has a default current limit of 1.62A when the ISET pin is left floating. This value can be increased by connecting a resistor from ISET to GND or decreased by connecting it to VIN, per Equations 1 and 2 in the datasheet. Exceeding 1.75A is discouraged to avoid potential device damage.
Does ISL80101AIRAJZ-T require external capacitors, and what values are recommended?
Yes, ISL80101AIRAJZ-T requires ≥10µF X5R/X7R ceramic capacitors on both input (VIN) and output (VOUT) pins, placed within 0.5cm trace length. Additional phase-boost capacitors (e.g., 100pF across R3) may improve transient response. MLCCs are preferred for their low ESR and high-frequency bypass capability.
How does the power-good (PG) output function on ISL80101AIRAJZ-T?
The PG pin on ISL80101AIRAJZ-T is an open-drain output that pulls low when VOUT falls below 84% of nominal, during current-limit fault, or if VIN is insufficient. It remains functional during ENABLE-driven shutdown but not during thermal shutdown. An external pull-up resistor to VOUT is required for proper operation.
Can ISL80101AIRAJZ-T operate with input voltages below 2.2V?
No, ISL80101AIRAJZ-T has a specified minimum input voltage of 2.2V per the Recommended Operating Conditions. Operation below this violates absolute maximum ratings and may result in loss of regulation, increased dropout, or undefined behavior. For sub-2.2V applications, alternative LDOs with lower VIN minima should be evaluated.
What thermal design considerations apply to ISL80101AIRAJZ-T's DFN package?
The ISL80101AIRAJZ-T's 10-lead 3×3mm DFN requires the EPAD to be soldered to a PCB ground plane with multiple thermal vias. With proper layout, θJA is 48°C/W. Power dissipation must stay below PDMAX = (TJ(MAX) − TA(MAX)) / θJA to avoid triggering 160°C thermal shutdown.
ISL80101AIRAJZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Adjustable
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5V
- Voltage Dropout (Max):
- 0.212V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 5 mA
- Current - Supply (Max):
- 7 mA
- PSRR:
- 48dB (120Hz ~ 1kHz)
- Control Features:
- Current Limit, Enable, Power Good, Soft Start
- Protection Features:
- Over Temperature
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
ISL80101AIRAJZ-T FAQ
1.How can I place an order for ISL80101AIRAJZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL80101AIRAJZ-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 ISL80101AIRAJZ-T reliable?
The price and inventory of ISL80101AIRAJZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL80101AIRAJZ-T is usually 5 days.
3.What payment methods are accepted for ISL80101AIRAJZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL80101AIRAJZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL80101AIRAJZ-T?
ISL80101AIRAJZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL80101AIRAJZ-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 ISL80101AIRAJZ-T?
For technical support, including ISL80101AIRAJZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL80101AIRAJZ-T requirements.
6.How does Aetrix verify that ISL80101AIRAJZ-T is sourced from the original manufacturer or authorized distributors?
All ISL80101AIRAJZ-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 ISL80101AIRAJZ-T meets industry standards.
7.What is the process for return or replacement of ISL80101AIRAJZ-T?
All ISL80101AIRAJZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL80101AIRAJZ-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 ISL80101AIRAJZ-T part is unused and in its original packaging.
Return procedure for ISL80101AIRAJZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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