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Renesas ISL8012IRZ-T7A
- Part No.:
- ISL8012IRZ-T7A
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL8012IRZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,281
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Product details
Overview
ISL8012IRZ-T7A from Renesas (formerly Intersil) is a monolithic synchronous buck regulator delivering up to 2A continuous output current from 2.7V–5.5V input, featuring 1MHz PWM switching, 40µA quiescent current in PFM mode, 0.8V internal reference, and integrated high-side P-MOSFET (120mΩ typical) and low-side N-MOSFET (110mΩ typical). It serves as a primary POL DC/DC converter for microprocessor core rails in portable instrumentation and battery-powered embedded systems.
For engineers reviewing the ISL8012IRZ-T7A datasheet, ISL8012IRZ-T7A pinout, ISL8012IRZ-T7A application, or ISL8012IRZ-T7A equivalent, key selection criteria include its 100% duty-cycle dropout capability (<240mV at 2A), selectable forced-PWM/PSM operation, 1ms power-good delay with RSI reset, soft-stop output discharge, and thermal shutdown at +140°C - all in a compact 3mm×3mm 10-lead DFN package.
Technical Context
The ISL8012IRZ-T7A employs current-mode PWM control with internal slope compensation (675mV/µs) and a transconductance error amplifier (20µA/V typical) for fast transient response and stable loop dynamics across load and line variations. Its dual-mode operation-forced PWM for low-noise EMI-sensitive designs or pulse-skipping (PFM) for ultra-low quiescent current-is selected via the MODE pin.
Fault management includes peak current limiting (2.65–3.5A), hiccup-mode short-circuit protection triggered by VFB < 0.2V, overtemperature shutdown (+140°C trip, +115°C recovery), and UVLO (2.5V rising threshold). The PG output provides a 1ms delayed open-drain signal synchronized to output regulation, resettable by RSI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2A continuous - supports FPGA/microcontroller core rails without external current boosting. |
| Input Voltage Range | 2.7V to 5.5V - compatible with single-cell Li-ion (3.0–4.2V), USB 5V, and 3.3V system rails. |
| Switching Frequency | 0.84–1.16MHz - enables use of small 2.2µH inductors and 10µF ceramic output capacitors. |
| Feedback Reference | 0.8V ±2.5% over temperature/load/line - enables precise adjustable output (e.g., 1.2V, 1.8V, 3.3V) with 3% total accuracy. |
| Quiescent Current | 40µA in PFM mode - extends battery life in always-on portable instruments and IoT edge nodes. |
| Duty Cycle Range | 0–100% - supports ultra-low dropout operation (e.g., 1.8V out from 2.0V in) with <240mV dropout at 2A. |
| Thermal Resistance | θJA = 49°C/W - requires minimal PCB copper area on exposed pad (connected to PGND/SGND) for full 2A operation at +85°C ambient. |
Pinout & Package
ISL8012IRZ-T7A is housed in a RoHS-compliant, lead-free 10-lead 3mm×3mm DFN package with exposed thermal pad (PD), requiring solder connection to PGND/SGND for electrical integrity and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2.7–5.5V; requires local 10µF ceramic decoupling to PGND. |
| VCC (Pin 2) | Logic supply rail | Internally tied to VIN; no external bypass needed. |
| EN (Pin 3) | Enable control | Active-high logic input; pulls output to ground and discharges VOUT when low. |
| PG (Pin 4) | Power-good indicator | Open-drain output asserting 1ms after VOUT enters regulation window; resettable by RSI. |
| MODE (Pin 5) | Operating mode select | High = PFM (low IQ); Low = forced PWM (fixed 1MHz, lower noise). |
| RSI (Pin 6) | PG reset input | Active-high signal that immediately clears PG and restarts 1ms timer if VOUT is in regulation. |
| VFB (Pin 7) | Feedback node | Connects to resistor divider for adjustable output; internally referenced to 0.8V. |
| SGND (Pin 8) | Signal ground reference | Reference point for EN, MODE, RSI, VFB, and PG; must be star-connected to minimize noise coupling. |
| PGND (Pin 9) | Power ground return | Return path for LX switch current; exposed pad must be soldered to this net. |
| LX (Pin 10) | Switch node | Connects directly to inductor; carries high di/dt switching current - keep trace short and wide. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P-MOSFET RDS(on) = 120mΩ / N-MOSFET RDS(on) = 110mΩ - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Soft-Start & Soft-Stop | 1ms internal soft-start ramp + active output discharge during shutdown - prevents inrush current and ensures clean power sequencing. |
| Pre-Biased Output Start-Up | Supports start-up into pre-charged output - essential for hot-swap and multi-rail systems where VOUT may already be biased. |
| Current Limit Protection | Peak current limit 2.65–3.5A with hiccup-mode recovery - protects against sustained overload without latch-off or manual reset. |
| Thermal Management | +140°C shutdown with +115°C hysteresis - maintains safe junction temperature under sustained 2A load in compact enclosures. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
|
Use Scenario: Point-of-load conversion in space-constrained telecom modules requiring high efficiency and low EMI. IC Role / Device Role / Timing Role: Primary synchronous buck regulator generating 1.2V/1.8V core voltage from 3.3V or 5V intermediate bus. Use Value: 95% peak efficiency at 1MHz reduces heat generation and eliminates need for heatsinks in sealed SFP housings. |
Use Scenario: Core voltage supply for ARM Cortex-M7 microcontrollers in portable test equipment. IC Role / Device Role / Timing Role: Adjustable-output buck regulator delivering 1.8V @ 2A with tight load regulation (±3%) across -40°C to +85°C. Use Value: 40µA quiescent current in PFM mode extends battery runtime in handheld oscilloscopes and multimeters. |
| Li-ion Battery Powered Devices | Small Form Factor (SFP) Modules |
|
Use Scenario: Power management in barcode scanners powered by single-cell Li-ion (3.0–4.2V). IC Role / Device Role / Timing Role: Input-voltage adaptive buck converter maintaining 3.3V output down to 2.7V input with 100% duty cycle. Use Value: <240mV dropout at 2A allows full utilization of battery capacity - extends operational time by ~12% vs. non-100% duty-cycle regulators. |
Use Scenario: Compact optical transceiver module requiring minimal board area and low-profile components. IC Role / Device Role / Timing Role: High-density POL regulator in 3mm×3mm DFN package occupying <0.35in² total PCB area including passives. Use Value: Integrated MOSFETs and internal compensation eliminate 4 external components versus controller-based solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 3A rated, 2.7–6V input, 3.5µA IQ in DCM, but no RSI-controlled PG reset or 100% duty cycle. | Better light-load efficiency; lacks programmable PG delay and soft-discharge shutdown. | Choose TPS62130ARGTR for higher current headroom and lower IQ in always-on sensor nodes where PG timing flexibility is not required. |
| MP2315GJ-Z | 2A rated, 4.5–24V input, 250kHz–1.4MHz adjustable frequency, no PFM mode, higher min input voltage. | Suitable for industrial 12V rails; incompatible with Li-ion direct input due to 4.5V UVLO. | Choose MP2315GJ-Z for wide-input industrial applications where 2.7V start-up and battery optimization are unnecessary. |
Compared with TPS62130ARGTR and MP2315GJ-Z, the ISL8012IRZ-T7A uniquely combines Li-ion-compatible 2.7V start-up, 100% duty cycle, RSI-resettable PG, and soft-discharge - making it optimal for portable, battery-first designs demanding precise power sequencing and maximum runtime.
Availability
ISL8012IRZ-T7A is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power supplies, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8012IRZ-T7A 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 acquired Intersil in 2017 and continues to manufacture and support its high-performance analog and power management portfolio.
The ISL8012IRZ-T7A belongs to Renesas' precision synchronous buck regulator product line, designed specifically for space-constrained, battery-operated embedded systems requiring high efficiency, low quiescent current, and robust fault protection.
FAQ
What is the minimum input voltage required for ISL8012IRZ-T7A to start regulation?
The ISL8012IRZ-T7A features an undervoltage lockout (UVLO) with a rising threshold of 2.5V. Regulation begins once VIN exceeds 2.5V, and the device sustains operation down to 2.7V minimum per recommended conditions - enabling reliable start-up from partially discharged Li-ion cells. Below 2.5V, the IC remains disabled and draws <2µA.
Does ISL8012IRZ-T7A support pre-biased output start-up?
Yes, the ISL8012IRZ-T7A supports pre-biased output start-up. During soft-start, the controller operates in skip mode and actively manages the feedback loop to avoid reverse current flow, allowing safe start-up into an already charged output capacitor - critical for hot-swap and multi-rail power systems.
How does the RSI pin affect the PG output behavior of ISL8012IRZ-T7A?
The RSI pin provides asynchronous reset capability for the ISL8012IRZ-T7A's 1ms power-good timer. When RSI transitions high while VOUT is within the PGOOD window (89–113% of nominal), PG immediately goes low and restarts the 1ms delay upon RSI returning low - enabling dynamic re-validation of output stability after system events like load transients or firmware resets.
What is the thermal performance limitation of ISL8012IRZ-T7A at full 2A load?
With proper PCB layout - including soldered exposed pad connected to ≥4 thermal vias to inner ground plane - the ISL8012IRZ-T7A achieves θJA = 49°C/W. At 2A output and 5.5V input, power dissipation is ~0.4W, resulting in ~20°C junction-to-ambient rise. Full 2A operation is sustainable up to +85°C ambient before thermal shutdown activates at +140°C junction.
Can ISL8012IRZ-T7A operate with zero output capacitance?
No. ISL8012IRZ-T7A requires minimum output capacitance for loop stability and ripple control. The datasheet specifies 2×10µF X5R/X7R ceramic capacitors for outputs from 0.8V to 3.3V. Omitting output capacitance causes instability, excessive voltage overshoot, and potential damage due to uncontrolled LC ringing at the LX node.
ISL8012IRZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
ISL8012IRZ-T7A FAQ
1.How can I place an order for ISL8012IRZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8012IRZ-T7A 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 ISL8012IRZ-T7A reliable?
The price and inventory of ISL8012IRZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8012IRZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL8012IRZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8012IRZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8012IRZ-T7A?
ISL8012IRZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8012IRZ-T7A 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 ISL8012IRZ-T7A?
For technical support, including ISL8012IRZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8012IRZ-T7A requirements.
6.How does Aetrix verify that ISL8012IRZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL8012IRZ-T7A 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 ISL8012IRZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL8012IRZ-T7A?
All ISL8012IRZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL8012IRZ-T7A, 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 ISL8012IRZ-T7A part is unused and in its original packaging.
Return procedure for ISL8012IRZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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