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Renesas ISL85012FRZ-T7A
- Part No.:
- ISL85012FRZ-T7A
- Manufacturer:
- Renesas
- Package:
- 15-WFQFN
- Datasheet:
-
ISL85012FRZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 12A 15TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,808
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Product details
Overview
ISL85012FRZ-T7A from Renesas Electronics is a monolithic synchronous buck regulator delivering 12A continuous output current from a 3.8V–18V input, featuring peak-current-mode control, selectable 300kHz/600kHz switching frequency, and integrated high-side (15mΩ) and low-side (7mΩ) MOSFETs. It targets point-of-load (POL) regulation in space-constrained server and telecom power systems.
For engineers reviewing the ISL85012FRZ-T7A datasheet, ISL85012FRZ-T7A pinout, ISL85012FRZ-T7A application, or ISL85012FRZ-T7A equivalent, key selection considerations include its internal/external compensation flexibility, hiccup vs. latch-off OCP configuration via MODE pin, prebias start-up capability, thermal shutdown at 160°C, and 3.5mm×3.5mm TQFN package with 0.8mm height.
Technical Context
The ISL85012FRZ-T7A implements a fixed-frequency peak-current-mode PWM controller with thermally compensated current sensing derived from internal MOSFET rDS(ON). Its dual-loop architecture combines fast transient response via current loop and stable regulation via error amplifier (EA) with 0.600V ±10.5mV reference and 5.5MHz open-loop bandwidth.
Operation supports CCM and DCM modes: SYNC pin floating enables PWM mode; pulled to GND enables Diode Emulation Mode (DEM) for light-load efficiency. Frequency selection is hardware-configured-FREQ pin grounded sets 300kHz; floating sets 600kHz-and external synchronization up to 1MHz is supported with rising-edge trigger.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 18V on PVIN; 4.5V to 18V on VIN - supports wide-input industrial and telecom rails including 5V, 12V, and 48V-derived supplies. |
| Output Current | 12A continuous - sufficient for high-performance CPU/GPU core rails and FPGA I/O banks without external current sharing. |
| Switching Frequency | Selectable 300kHz or 600kHz (via FREQ pin); sync range 100kHz–1MHz - enables EMI optimization and inductor size trade-offs. |
| Feedback Reference | 0.600V ±10.5mV (−40°C to +125°C) - ensures tight output voltage accuracy across temperature for sub-1V digital rails. |
| Power MOSFET RDS(ON) | High-side: 15mΩ, Low-side: 7mΩ @ 900mA - minimizes conduction loss and enables >90% efficiency at 12A/1.8V with 12V input. |
| OCP Schemes | Hiccup (MODE pin floating) or latch-off (MODE pin to GND) - configurable fault recovery behavior per system safety requirements. |
| Thermal Protection | Shut-down at 160°C with 10°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
Pinout & Package
ISL85012FRZ-T7A is housed in a RoHS-compliant, 15-lead 3.5mm×3.5mm TQFN package with exposed thermal pad, optimized for low θJA (33°C/W) and compact PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SYNC | Synchronization & mode select | Rising-edge triggered sync input (100kHz–1MHz); float = PWM mode, GND = DCM/DEM mode. |
| 2 MODE | OCP scheme control | Floating = hiccup OCP (150ms blanking), GND = latch-off OCP - determines fault recovery behavior. |
| 3 FREQ | Default frequency select | Floating = 600kHz, GND = 300kHz - sets nominal oscillator frequency before sync override. |
| 4 PG | Power-good indicator | Open-drain output asserting after 1.5ms when FB reaches 90% of 0.6V; deasserts at 87% or 116%. |
| 5 VDD | LDO decoupling | 5V internal LDO supply node; requires 2.2µF ceramic capacitor to GND - powers analog control blocks. |
| 6 BOOT | High-side gate driver supply | Bootstrap node for upper FET gate drive; requires 0.1µF capacitor to PHASE - enables N-channel high-side switch. |
| 7 GND | Power ground reference | Main power return path; must connect to thermal pad via multiple vias for optimal heat dissipation. |
| 8 PHASE | Switch node | Connection between internal HS/LS FETs and external inductor - carries high di/dt; requires short, low-inductance routing. |
| 9 PVIN | Power stage input | Primary input for power MOSFETs; requires local ceramic decoupling (e.g., 3×22µF) close to pin. |
| 10 FB | Voltage feedback input | Inverting EA input; sets output via resistor divider to 0.6V reference - enables adjustable 0.6V–5V outputs. |
| 11 COMP | Error amplifier output | EA output for internal (200Ω to GND) or external compensation - defines loop stability and transient response. |
| 12,13 DNC | No-connect | Must remain unconnected - no internal connection; floating required per design guidelines. |
| 14 EN | Enable control | Active-high enable; threshold 0.6V with 100mV hysteresis - supports sequencing and remote ON/OFF control. |
| 15 VIN | Control circuit input | Supply for bias circuits and internal LDO; 4.5V–18V range; decouple with 1µF ceramic to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Monolithic 12A solution with matched 15mΩ/7mΩ HS/LS FETs eliminates external MOSFET selection and layout complexity. |
| Prebias Start-up | Supports start-up into prebiased output (VOUT < programmed value) - critical for hot-swap and multi-rail sequencing applications. |
| Flexible Compensation | Internal compensation (200Ω + 30pF/800kΩ network) or full external network support - simplifies design while retaining tuning headroom. |
| Robust Fault Protection | Dual OCP (HS/LS), reverse current limit, input/output OVP, thermal shutdown, and BOOT UV detection - reduces need for external protection ICs. |
| Low-Profile Packaging | 3.5mm×3.5mm TQFN with 0.8mm max height - enables ultra-thin POL designs in servers, switches, and embedded controllers. |
Applications
| Server Point-of-Load Regulation | Industrial PLC Power Management |
|---|---|
Use Scenario: Delivering 1.8V/12A to high-performance ASICs in 1U rack servers with strict airflow and board height constraints. IC Role / Device Role / Timing Role: Primary POL regulator converting 12V intermediate bus to core voltage with fast load-step response and thermal resilience. Use Value: Integrated 12A capability and 3.5mm×3.5mm footprint reduce BOM count and PCB area by eliminating discrete power stages. |
Use Scenario: Providing stable 3.3V/5A rail for I/O modules and communication interfaces in factory automation PLCs operating at −40°C to +85°C. IC Role / Device Role / Timing Role: Robust DC-DC converter with latch-off OCP and input OVP protecting against field wiring faults and brownouts. Use Value: −40°C to +125°C junction rating and 20V input OVP ensure reliable operation in harsh industrial environments. |
| Telecom Base Station RF Power | Test & Measurement Equipment |
Use Scenario: Generating low-noise 5V/3A supply for RF front-end amplifiers in 5G small cells requiring minimal EMI and high PSRR. IC Role / Device Role / Timing Role: High-efficiency buck regulator synchronized to system clock (via SYNC pin) to avoid beat frequencies in sensitive RF bands. Use Value: 100kHz–1MHz external sync capability enables deterministic noise placement and compliance with CISPR-32 Class B limits. |
Use Scenario: Programmable 0.6V–5V output for precision analog subsystems in automated test equipment requiring rapid voltage settling and low ripple. IC Role / Device Role / Timing Role: Adjustable voltage regulator with 0.600V reference accuracy and <20mVPP output ripple at 12A (Figure 12). Use Value: Tight FB reference tolerance and internal slope compensation ensure consistent regulation across unit-to-unit and temperature variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPM3695-100 | 10A rated, 2.7V–18V input, integrated inductor, fixed 500kHz fSW, no external sync | Targeted at ultra-compact, low-risk designs where board space is more constrained than performance flexibility | Choose MPM3695-100 when inductor integration and simplified layout outweigh need for frequency sync or 12A capacity. |
| TPS546D24 | 12A, 3.0V–18V input, PMBus interface, digital loop compensation, 300kHz–2MHz programmable fSW | Required for systems needing telemetry, dynamic voltage scaling, or closed-loop margining via digital interface | Choose TPS546D24 when digital control, real-time telemetry, or adaptive loop tuning are mandatory system features. |
Compared with MPM3695-100 and TPS546D24, the ISL85012FRZ-T7A offers analog simplicity and proven robustness for high-reliability analog POLs, trading digital configurability for lower BOM cost and reduced firmware dependency.
Availability
ISL85012FRZ-T7A is available at Aetrix Electronics and suitable for servers and cloud infrastructure POLs, telecom and networking systems, and industrial PLCs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ISL85012FRZ-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 is a global semiconductor leader specializing in microcontrollers, analog power management, and timing solutions for automotive, industrial, and datacenter applications.
The ISL85012FRZ-T7A belongs to Renesas' high-current monolithic buck regulator product line, designed specifically for space-constrained, high-efficiency point-of-load conversion in enterprise and infrastructure equipment.
FAQ
What is the maximum continuous output current of the ISL85012FRZ-T7A?
The ISL85012FRZ-T7A delivers 12A of continuous output current under recommended operating conditions (TJ ≤ +125°C, proper PCB thermal design). This rating assumes adequate copper area, thermal vias under the exposed pad, and ambient temperature ≤ +85°C. Derating applies above 85°C ambient per thermal resistance data (θJA = 33°C/W).
Does the ISL85012FRZ-T7A support start-up into a prebiased output?
Yes, the ISL85012FRZ-T7A supports prebias start-up: both high-side and low-side MOSFETs remain disabled until the internal soft-start voltage exceeds the FB pin voltage. This prevents reverse current flow and ensures controlled ramp-up even when the output is initially biased to a voltage below the target regulation level.
How is the switching frequency configured on the ISL85012FRZ-T7A?
The ISL85012FRZ-T7A switching frequency is set by the FREQ pin: floating selects 600kHz (540–660kHz typical), grounding selects 300kHz (250–310kHz typical). The device also accepts external synchronization from 100kHz to 1MHz on the SYNC pin, overriding the FREQ setting with rising-edge triggering.
What protection features are integrated into the ISL85012FRZ-T7A?
The ISL85012FRZ-T7A integrates high-side and low-side overcurrent protection (with hiccup or latch-off response), input and output overvoltage protection, thermal shutdown at 160°C, BOOT undervoltage detection, and power-good monitoring. These functions operate autonomously without external components, enhancing system reliability in fault conditions.
Can the ISL85012FRZ-T7A be used with external compensation?
Yes, the ISL85012FRZ-T7A supports both internal and external compensation. For internal compensation, connect a 200Ω resistor from COMP to GND. For external compensation, omit the resistor and implement a full Type II or Type III network between COMP and FB, enabling precise loop tuning for demanding transient requirements.
ISL85012FRZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 15-WFQFN
- 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):
- 3.8V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 12A
- Frequency - Switching:
- 300kHz, 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-TQFN (3.5x3.5)
ISL85012FRZ-T7A FAQ
1.How can I place an order for ISL85012FRZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85012FRZ-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 ISL85012FRZ-T7A reliable?
The price and inventory of ISL85012FRZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85012FRZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL85012FRZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85012FRZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85012FRZ-T7A?
ISL85012FRZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85012FRZ-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 ISL85012FRZ-T7A?
For technical support, including ISL85012FRZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85012FRZ-T7A requirements.
6.How does Aetrix verify that ISL85012FRZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL85012FRZ-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 ISL85012FRZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL85012FRZ-T7A?
All ISL85012FRZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL85012FRZ-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 ISL85012FRZ-T7A part is unused and in its original packaging.
Return procedure for ISL85012FRZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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