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Renesas ISL8012IRZ
- Part No.:
- ISL8012IRZ
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL8012IRZ.pdf
- Description:
- IC REG BUCK ADJ 2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,996
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Product details
Overview
ISL8012IRZ from Renesas (formerly Intersil) is a monolithic synchronous buck DC/DC regulator delivering up to 2A continuous output current from a 2.7V–5.5V input, featuring 1MHz PWM switching, 40µA quiescent current in PFM mode, and integrated high- and low-side MOSFETs with typical RDS(on) of 120mΩ and 110mΩ. It serves as a point-of-load (POL) power supply for microcontrollers, FPGAs, and Li-ion–powered portable instruments.
For engineers reviewing the ISL8012IRZ datasheet, ISL8012IRZ pinout, ISL8012IRZ application, or ISL8012IRZ equivalent, key selection criteria include its 100% duty-cycle capability (<240mV dropout at 2A), selectable forced-PWM/PSM operation, internal soft-start (1ms), power-good timing (1ms delay), and thermal shutdown at +140°C - all in a compact 3mm×3mm 10-lead DFN package with exposed thermal pad.
Technical Context
The ISL8012IRZ employs current-mode PWM control with slope compensation and a transconductance error amplifier internally compensated via a 27pF/390kΩ network. Its peak-current limiting (2.65–3.50A) and hiccup-mode short-circuit protection respond to overcurrent events by disabling the high-side P-MOSFET per cycle.
Operation supports two distinct modes: forced PWM (MODE = low) maintains fixed 1MHz switching regardless of load, while PFM (MODE = high) enables pulse-skipping at light loads - triggered after eight consecutive zero-crossing detections - reducing switching loss and achieving 40µA quiescent current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7V to 5.5V - supports single-cell Li-ion (3.0–4.2V), USB 5V, and 3.3V rails without external LDO pre-regulation. |
| Output Current | 2A continuous - sufficient for powering core logic of mid-tier FPGAs or dual-core microprocessors in space-constrained designs. |
| Switching Frequency | 0.84–1.16 MHz - enables use of small 2.2µH inductors and 2×10µF ceramic output capacitors, minimizing PCB area to <0.35in². |
| Feedback Reference | 0.800V ±2.5% over temperature/load/line - sets output voltage accuracy to ±3% with external resistor divider scaling. |
| Quiescent Current | 40µA in PFM mode - extends battery runtime in always-on portable instrumentation with light-load standby periods. |
| Duty Cycle Range | 0–100% - allows dropout operation down to VIN − VOUT = IOUT × RDS(on)_P, e.g., <240mV at 2A for extended battery discharge. |
| Power-Good Delay | 1ms - provides deterministic system reset timing after output regulation is achieved, compatible with µC reset controllers. |
Pinout & Package
ISL8012IRZ is housed in a RoHS-compliant, lead-free 10-lead 3mm×3mm DFN package (PKG DWG # L10.3x3C) with an exposed thermal pad (PD) that must be soldered to PGND/SGND for electrical integrity and optimal thermal performance (θJA = 49°C/W, θJC = 5.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 2.7–5.5V; requires local 10µF ceramic decoupling to PGND to suppress high-frequency switching noise. |
| VCC | Logic supply rail | Internally tied to VIN; powers control circuitry - no external bypass needed if VIN is stable. |
| EN | Enable control | Active-high logic input; drives internal discharge switch during shutdown to rapidly collapse VOUT. |
| PG | Power-good open-drain output | Asserts high 1ms after VOUT enters regulation window (±3% of nominal); resettable via RSI pin. |
| MODE | Operating mode select | High = PFM (low-IQ); Low = forced PWM (low-noise, constant fSW) - must not float. |
| RSI | PG reset input | Active-high signal resets PG timer; transitions from high-to-low restart counter when VFB is in regulation. |
| VFB | Feedback node | Connects to resistor divider for adjustable outputs (e.g., 1.2V, 1.8V); internal 0.8V reference sets regulation point. |
| SGND | Analog ground reference | Reference for error amplifier and internal comparators; separate from PGND to minimize noise coupling. |
| PGND | Power ground return | Return path for LX switching current; exposed pad must be connected here for thermal and EMI control. |
| LX | Switch node | Drives external inductor; carries high di/dt - requires short, low-inductance layout to PGND and SGND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated P/N-channel MOSFETs | RDS(on) = 120mΩ (P) / 110mΩ (N) at 5.5V - eliminates external switches, reduces BOM count, and improves efficiency up to 95%. |
| Selectably forced PWM or PFM mode | MODE pin selects between constant-frequency noise control (PWM) or ultra-low-IQ battery optimization (PFM) - no external components required. |
| Soft-start and soft-stop | 1ms internal soft-start limits inrush current; active discharge during disable collapses VOUT via 100Ω internal switch - prevents back-powering. |
| Comprehensive fault protection | Peak current limiting (3A typ), hiccup-mode short-circuit response, over-temperature shutdown (+140°C), and output overvoltage detection - enables robust standalone operation. |
| Pre-biased output startup | Supports start-up into pre-charged output rails - essential for hot-swap and multi-rail sequencing in FPGA and DSP systems. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted DC/DC module converting 5V or 3.3V intermediate bus to 1.2V/1.8V core voltage in telecom line cards. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing regulated core power with fast transient response to dynamic load steps. Use Value: 1MHz switching enables miniature magnetics; 2A output supports multi-core SoCs; 100% duty cycle extends usable input range during brownout conditions. |
Use Scenario: Powering ARM Cortex-M7 microcontroller and associated peripherals in industrial edge sensor node with Li-ion battery backup. IC Role / Device Role / Timing Role: Main system regulator delivering 3.3V I/O and 1.2V core supply with programmable sequencing via EN and PG signals. Use Value: 40µA PFM quiescent current maximizes battery life in sleep mode; soft-start prevents reset glitches during wake-up; PG signal synchronizes firmware initialization. |
| Portable Instruments | Li-ion Battery Powered Devices |
Use Scenario: Handheld multimeter requiring stable 3.3V analog and digital rails from a single 3.7V Li-ion cell across full discharge range (4.2V → 3.0V). IC Role / Device Role / Timing Role: Single-stage buck converter replacing inefficient linear regulators to maintain efficiency >85% even at 3.0V input. Use Value: 100% duty cycle ensures regulation down to 3.0V input; ±3% output accuracy preserves ADC reference stability; low EMI in forced-PWM mode avoids measurement noise. |
Use Scenario: Barcode scanner with burst-mode operation: 2A peak current during laser activation, then <1mA standby between scans. IC Role / Device Role / Timing Role: Adaptive POL regulator switching between forced-PWM (during scan) and PFM (between scans) to balance noise and efficiency. Use Value: Seamless mode transition eliminates output voltage disturbance; 1ms PG delay aligns with MCU wake-up timing; internal discharge prevents leakage through disconnected peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TPS62130ARGTR | 3A output, 2.7–6V input, 3.5MHz switching, 17µA IQ; uses external compensation; no RSI reset function. | Better suited for ultra-thin portable devices needing higher current and smaller inductors; lacks PG reset flexibility. | Choose TPS62130ARGTR when higher output current and faster transient response are prioritized over PG configurability and thermal pad layout simplicity. |
| Analog Devices ADP2370ACPZ-R7 | 2A output, 3.2–15V input, 600kHz switching, 30µA IQ; includes precision enable threshold; no MODE pin for PFM/PWM selection. | Designed for wide-input industrial supplies (e.g., 12V bus); lacks light-load mode control and 100% duty cycle. | Choose ADP2370ACPZ-R7 for fixed 5V/3.3V conversion from higher-voltage rails where input range exceeds 5.5V and adaptive light-load operation is unnecessary. |
Compared with TPS62130ARGTR and ADP2370ACPZ-R7, the ISL8012IRZ uniquely balances 2A capability, 2.7–5.5V compatibility, configurable PFM/PWM operation, 1ms resettable PG, and DFN thermal performance - making it optimal for space-constrained, battery-sensitive applications requiring design flexibility without sacrificing reliability.
Availability
ISL8012IRZ is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and Li-ion–powered portable instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8012IRZ 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) is a global semiconductor leader specializing in microcontrollers, analog power, and mixed-signal solutions for automotive, industrial, and IoT markets.
The ISL8012IRZ belongs to Renesas' high-efficiency DC/DC regulator product line, engineered specifically for low-voltage, high-density point-of-load power in battery-powered and space-constrained embedded systems.
FAQ
What is the maximum output current supported by the ISL8012IRZ?
The ISL8012IRZ delivers up to 2A continuous output current across the full operating temperature range (−40°C to +85°C), with peak current limiting set at 2.65–3.50A to protect against overload and short-circuit conditions. This rating assumes proper thermal management using the exposed pad connected to PGND and adequate PCB copper area.
Does the ISL8012IRZ support pre-biased output startup?
Yes, the ISL8012IRZ supports pre-biased output startup - a critical feature for hot-swap and multi-rail sequencing applications. During soft-start, the controller operates in skip mode and actively manages the feedback loop to avoid sinking current from a pre-charged output, preventing voltage overshoot or instability.
How does the MODE pin affect ISL8012IRZ operation?
The MODE pin selects between forced PWM mode (logic low) and PFM mode (logic high). In forced PWM, switching remains fixed at ~1MHz regardless of load, minimizing EMI and output ripple. In PFM, the device skips pulses at light loads to reduce switching loss, achieving 40µA quiescent current - ideal for battery longevity.
What is the purpose of the RSI pin on the ISL8012IRZ?
The RSI (Reset Input) pin provides active control over the Power-Good (PG) signal timing. Driving RSI high resets the internal 1ms PG timer immediately; a high-to-low transition restarts the timer only if VFB is within regulation. This enables precise system-level power sequencing and fault recovery without requiring external logic.
Can the ISL8012IRZ operate with 100% duty cycle, and what is its practical benefit?
Yes, the ISL8012IRZ supports true 100% duty cycle operation, enabling regulation down to VIN − VOUT = IOUT × RDS(on)_P. At 2A, this yields <240mV dropout - extending usable battery life in Li-ion applications by maintaining regulation until the cell voltage drops near 3.0V, unlike fixed-frequency converters requiring minimum VIN headroom.
ISL8012IRZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tray
- 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):
- 0.8V
- 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 FAQ
1.How can I place an order for ISL8012IRZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8012IRZ 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 reliable?
The price and inventory of ISL8012IRZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8012IRZ is usually 5 days.
3.What payment methods are accepted for ISL8012IRZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8012IRZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8012IRZ?
ISL8012IRZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8012IRZ 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?
For technical support, including ISL8012IRZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8012IRZ requirements.
6.How does Aetrix verify that ISL8012IRZ is sourced from the original manufacturer or authorized distributors?
All ISL8012IRZ 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 meets industry standards.
7.What is the process for return or replacement of ISL8012IRZ?
All ISL8012IRZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL8012IRZ, 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 part is unused and in its original packaging.
Return procedure for ISL8012IRZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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