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Renesas ISL8012IRZ-T
- Part No.:
- ISL8012IRZ-T
- Manufacturer:
- Renesas
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
ISL8012IRZ-T.pdf
- Description:
- IC REG BUCK ADJ 2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:31,982
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Product details
Overview
ISL8012IRZ-T 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, 0.8V feedback reference, and integrated high-side P-MOSFET (120mΩ typical) and low-side N-MOSFET (110mΩ typical). It serves as a primary POL power stage for microcontrollers and FPGAs in portable instrumentation and Li-ion powered devices.
For engineers reviewing the ISL8012IRZ-T datasheet, ISL8012IRZ-T pinout, ISL8012IRZ-T application, or ISL8012IRZ-T equivalent, key selection criteria include its 100% duty-cycle dropout capability (<240mV at 2A), selectable forced-PWM/PFM operation, internal soft-start (1ms), power-good with 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-T employs current-mode PWM control with slope compensation for loop stability and fast transient response. Its dual-MOSFET architecture enables high efficiency (up to 95%) and supports both discontinuous conduction mode (DCM) and forced continuous conduction mode (CCM) via the MODE pin.
It integrates internal compensation, peak current limiting (2.65–3.5A), overvoltage protection (PGOOD thresholds at 85–95% and 104–113% of nominal), and hiccup-mode short-circuit protection triggered when VFB falls below 0.2V. The RSI pin provides asynchronous reset of the PG timer without affecting regulation.
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 core logic supply of mid-tier microcontrollers and FPGA I/O banks. |
| Switching Frequency | 0.84–1.16MHz - enables use of small 2.2µH inductors and 2×10µF ceramic output capacitors, minimizing PCB area. |
| Feedback Reference | 0.8V ±2.5% - allows precise adjustable output via resistor divider; supports 0.8V fixed-output configuration with no external resistors. |
| Quiescent Current | 40µA in PFM mode - extends battery runtime in always-on sensor nodes and portable test equipment. |
| Duty Cycle Range | 0–100% - ensures ultra-low dropout operation (e.g., 240mV at 2A) during battery voltage sag, maintaining regulation down to VIN ≈ VOUT. |
| Power-Good Delay | 1ms - provides deterministic system reset timing after output stabilization, compatible with µC reset controllers. |
| Thermal Shutdown | +140°C activation / +115°C recovery - protects against sustained overload or poor heatsinking in enclosed SFP modules. |
Pinout & Package
ISL8012IRZ-T is housed in a RoHS-compliant, lead-free 10-lead 3mm×3mm DFN package with exposed thermal pad (PD) that must be soldered to PGND for electrical integrity and optimal thermal performance (θJA = 49°C/W, θJC = 5.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 2.7–5.5V; requires local 10µF ceramic decoupling to PGND to suppress switching noise. |
| VCC (Pin 2) | Logic supply rail | Internally tied to VIN; powers control circuitry and must not be externally biased. |
| EN (Pin 3) | Enable/disable control | Active-high logic input; pulls output capacitor to ground during shutdown via internal 100Ω discharge switch. |
| PG (Pin 4) | Power-good indicator | Open-drain output asserting high 1ms after VOUT enters regulation window; resettable by RSI. |
| MODE (Pin 5) | Operation mode select | High = PFM (low-noise, high-efficiency light-load); Low = forced PWM (constant frequency, reduced EMI). |
| RSI (Pin 6) | PG timer reset | Active-high asynchronous reset for PG delay; does not interrupt regulation or cause output disturbance. |
| VFB (Pin 7) | Feedback input | Connects to resistor divider for adjustable output; directly ties to output for fixed 0.8V version. |
| 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 current and thermal pad; must be low-inductance connection to minimize ground bounce. |
| LX (Pin 10) | Switch node | Drives external inductor; experiences full switching voltage swing (0V to VIN); layout critical for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated MOSFETs | P-Channel (120mΩ typ.) and N-Channel (110mΩ typ.) switches eliminate external FETs and gate drivers, reducing BOM count and layout complexity. |
| Selectably Forced PWM Mode | Eliminates variable-frequency noise in noise-sensitive applications (e.g., ADC reference supplies) while maintaining 1MHz clock stability under all loads. |
| Pre-biased Output Startup | Supports hot-swap and rail sequencing where output capacitor is pre-charged; avoids reverse current flow during soft-start. |
| Internal Soft-Start | 1ms controlled ramp prevents inrush current and overshoot during power-up, eliminating need for external soft-start circuitry. |
| Output Discharge on Shutdown | Internal 100Ω switch actively discharges output capacitor when EN is low, ensuring rapid, safe power-down for downstream logic. |
| Over-Temperature Protection | Hysteresis-based shutdown (+140°C trip / +115°C recovery) prevents thermal runaway in sealed enclosures without requiring external thermal sensors. |
Applications
| DC/DC POL Modules | µC/µP, FPGA and DSP Power |
|---|---|
Use Scenario: Compact, board-mounted point-of-load converters supplying regulated 1.2V/1.8V/3.3V to embedded processors in space-constrained industrial controllers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing stable, low-noise core voltage with fast load-transient response. Use Value: 95% peak efficiency and 40µA quiescent current extend operational time in battery-backed systems while minimizing thermal footprint. | Use Scenario: Core voltage supply for ARM Cortex-M4 microcontrollers and Xilinx Spartan-7 FPGAs in portable test instruments. IC Role / Device Role / Timing Role: High-current, low-dropout DC/DC converter enabling reliable startup and regulation across full Li-ion battery range (3.0–4.2V). Use Value: 100% duty cycle operation maintains regulation down to VIN = VOUT + 240mV, maximizing usable battery capacity. |
| Plug-in DC/DC Modules for Routers and Switchers | Li-ion Battery Powered Devices |
Use Scenario: Hot-pluggable SFP+ module power management where strict size, efficiency, and EMI compliance are required. IC Role / Device Role / Timing Role: Integrated POL regulator with forced-PWM mode selected to meet CISPR-22 conducted emissions limits in dense backplane environments. Use Value: 1MHz fixed-frequency operation simplifies EMI filter design and avoids interference with 2.5G/10G serial data lanes. | Use Scenario: Power management in handheld barcode readers and portable medical sensors operating from single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Main system regulator delivering 1.8V/2A with PFM mode enabled for ultra-low standby current during scan-idle periods. Use Value: 40µA quiescent current in PFM mode extends battery life beyond 100 hours in intermittent-use applications. |
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 output, 2.95–6V input, 3.5µA quiescent current, no RSI pin, different pinout (16-pin QFN) | Better suited for higher-current, wider-input applications; lacks PG reset functionality and 100% duty cycle. | Choose TPS62130ARGTR only if >2A output or <2.95V minimum input is required; verify PCB layout compatibility. |
| MP2143GJ-Z | 2A output, 2.5–5.5V input, 25µA quiescent current, no MODE pin for PFM/PWM selection, different thermal pad layout | Lower IQ but no user-selectable mode; less flexible for mixed-noise/efficiency requirements. | Choose MP2143GJ-Z for cost-sensitive designs where fixed PFM operation suffices and RSI/PG reset is unnecessary. |
Compared with TPS62130ARGTR and MP2143GJ-Z, the ISL8012IRZ-T uniquely combines 100% duty cycle, programmable PFM/PWM mode, RSI-resettable PG, and 3mm×3mm DFN size - making it optimal for compact, battery-aware, and noise-controlled POL implementations.
Availability
ISL8012IRZ-T is available at Aetrix Electronics and suitable for DC/DC POL modules, µC/FPGA power delivery, and Li-ion battery-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL8012IRZ-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 Corporation is a global semiconductor leader delivering trusted embedded design innovation, with deep expertise in power management ICs for industrial, automotive, and computing applications.
The ISL8012IRZ-T belongs to Renesas' high-efficiency synchronous buck regulator product line, designed specifically for space-constrained, battery-operated systems demanding low quiescent current, fast transient response, and robust fault protection.
FAQ
What is the maximum output current capability of the ISL8012IRZ-T?
The ISL8012IRZ-T delivers up to 2A continuous output current across the full operating temperature range (-40°C to +85°C), with peak current limit set between 2.65A and 3.5A depending on junction temperature. This rating assumes proper thermal management using the exposed pad connected to PGND and adequate PCB copper area.
Does the ISL8012IRZ-T support adjustable output voltage?
Yes, the ISL8012IRZ-T supports adjustable output voltage via an external resistor divider connected to the VFB pin. With its 0.8V internal reference, outputs from 0.8V to 5.5V can be programmed - for example, 1.8V using R2 = 124kΩ and R3 = 100kΩ. Fixed 0.8V operation is also supported by connecting VFB directly to the output.
How does the MODE pin affect ISL8012IRZ-T operation?
The MODE pin selects between two distinct operating modes: logic-high (≥1.4V) enables pulse-skipping PFM mode for highest light-load efficiency, while logic-low (≤0.4V) forces constant-frequency PWM mode to reduce EMI and improve noise immunity. Leaving MODE floating is prohibited per datasheet guidance.
What is the purpose of the RSI pin on the ISL8012IRZ-T?
The RSI pin provides asynchronous reset of the internal 1ms power-good timer. When driven high, it immediately pulls PG low and restarts the 1ms delay once RSI returns low - all without disrupting output regulation. This enables precise system-level power sequencing independent of startup conditions.
Can the ISL8012IRZ-T operate with a pre-biased output capacitor?
Yes, the ISL8012IRZ-T supports pre-biased output startup. During soft-start, it operates in skip mode and avoids reverse current flow into the output capacitor, preventing potential damage or bus contention in hot-swap or multi-rail systems where the output may already be charged.
ISL8012IRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-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):
- 0.8V
- 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-T FAQ
1.How can I place an order for ISL8012IRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL8012IRZ-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 ISL8012IRZ-T reliable?
The price and inventory of ISL8012IRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL8012IRZ-T is usually 5 days.
3.What payment methods are accepted for ISL8012IRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL8012IRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL8012IRZ-T?
ISL8012IRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL8012IRZ-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 ISL8012IRZ-T?
For technical support, including ISL8012IRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL8012IRZ-T requirements.
6.How does Aetrix verify that ISL8012IRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL8012IRZ-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 ISL8012IRZ-T meets industry standards.
7.What is the process for return or replacement of ISL8012IRZ-T?
All ISL8012IRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL8012IRZ-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 ISL8012IRZ-T part is unused and in its original packaging.
Return procedure for ISL8012IRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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