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Renesas ISL85014FRZ-T
- Part No.:
- ISL85014FRZ-T
- Manufacturer:
- Renesas
- Package:
- 15-WFQFN
- Datasheet:
-
ISL85014FRZ-T.pdf
- Description:
- IC REG BUCK ADJ 14A 15TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,641
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Product details
Overview
ISL85014FRZ-T from Renesas Electronics is a monolithic synchronous buck regulator delivering 14A continuous output current from a 3.8V–18V input, featuring peak-current-mode control, integrated 15mΩ high-side and 6.5mΩ low-side MOSFETs, and 0.6V reference accuracy (±1.75%). It serves as a primary point-of-load (POL) regulator in high-density server and telecom power systems.
For engineers reviewing the ISL85014FRZ-T datasheet, ISL85014FRZ-T pinout, ISL85014FRZ-T application, or ISL85014FRZ-T equivalent, key selection criteria include its 300/600kHz selectable switching frequency, hiccup/latch-off OCP configurability via MODE pin, thermal shutdown at 160°C, and compatibility with internal or external compensation networks.
Technical Context
The ISL85014FRZ-T 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 current-loop response (5.5MHz error amplifier bandwidth) with voltage-loop stability enabled by programmable internal RC compensation (30pF/800kΩ at 600kHz; 30pF/1200kΩ at 300kHz).
Operation supports Forced Continuous Conduction Mode (FCCM) or Diode Emulation Mode (DEM) via SYNC pin configuration, while overcurrent protection uses cycle-by-cycle limiting on both high-side (20A typ) and low-side (23A forward, –7.5A reverse) paths. Input overvoltage lockout activates at 20.5V rising threshold with 1V hysteresis.
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-range industrial and telecom inputs including 12V and 48V-derived rails. |
| Output Current | 14A continuous - enables single-chip POL replacement for multi-phase controllers in space-constrained 1U servers. |
| Feedback Reference | 0.600V ±1.75% - ensures tight output regulation down to 0.6V, critical for modern CPU/GPU core supplies. |
| Switching Frequency | 300kHz (FREQ=GND) or 600kHz (FREQ=float); sync-capable up to 1MHz - balances efficiency vs. size trade-offs and enables EMI spread-spectrum coordination. |
| Thermal Shutdown | 160°C junction temperature with 10°C hysteresis - provides robust protection during sustained overload or airflow loss in sealed enclosures. |
| High-Side rDS(ON) | 15mΩ @ 900mA - minimizes conduction loss at high load, contributing to >90% efficiency at 12VIN/3.3VOUT/10A. |
| OCP Configuration | Hiccup (MODE=float) or Latch-Off (MODE=GND) - allows system-level fault recovery strategy alignment without external logic. |
Pinout & Package
ISL85014FRZ-T is housed in a RoHS-compliant, thermally enhanced 15-lead 3.5mm × 3.5mm TQFN package (0.8mm max height) with exposed thermal pad for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SYNC) | Synchronization & mode control | Selects FCCM (float), DEM (GND), or external clock sync (rising-edge triggered); determines light-load behavior and EMI profile. |
| 2 (MODE) | OCP scheme selector | Configures hiccup (float) or latch-off (GND) response after eight consecutive overcurrent cycles - defines system fault-handling policy. |
| 3 (FREQ) | Default frequency setting | Sets 600kHz (float) or 300kHz (GND); directly impacts inductor size, capacitor ripple current rating, and efficiency vs. noise trade-off. |
| 4 (PG) | Open-drain power-good indicator | Asserts high when FB is within 90–116% of target; requires external pull-up; enables sequencing and fault monitoring in multi-rail systems. |
| 5 (VDD) | Internal LDO decoupling | Supplies 5V core bias; requires 2.2µF ceramic cap to GND; connects directly to VIN if VIN is 3–5.5V to bypass LDO losses. |
| 6 (BOOT) | High-side gate driver bootstrap | Requires 0.1µF capacitor to PHASE; enables N-channel high-side FET drive without external charge pump. |
| 7 (GND) | Power ground reference | Must be connected to PCB ground plane via multiple vias under EPAD for thermal relief and low-noise return path. |
| 8 (PHASE) | Switch node | Connects to inductor; carries high di/dt; layout must minimize loop area to reduce EMI and voltage spikes. |
| 9 (PVIN) | Main power stage input | Accepts 3.8–18V; requires local ceramic decoupling to GND; separate from control VIN to isolate noise coupling. |
| 10 (FB) | Voltage feedback input | Inverting input to 0.6V reference; sets output via resistor divider; leakage <10nA preserves accuracy with high-value resistors. |
| 11 (COMP) | Error amplifier output | Connect to FB via RC network for external compensation; 200Ω to GND enables internal compensation for simplified design. |
| 12,13 (DNC) | Do Not Connect | Must remain unconnected and floating; no internal function or electrical connection. |
| 14 (EN) | Enable control | Active-high; starts soft-start when voltage exceeds 0.6V; supports precise power sequencing with RC filter options. |
| 15 (VIN) | Control circuit input | Supplies bias for EN, POR, and logic; requires 1µF ceramic cap; operates 4.5–18V; powers internal LDO that generates VDD. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Monolithic 15mΩ/6.5mΩ high-side/low-side MOSFETs eliminate external discrete switches and reduce BOM count by ≥4 components. |
| Prebias Start-Up | Supports start-up into prebiased outputs up to target VOUT, preventing reverse current flow and enabling hot-swap capability in redundant power systems. |
| Programmable Light-Load Mode | SYNC pin selects FCCM for constant frequency or DEM for ultra-low quiescent current (<13µA shutdown) in idle states. |
| Robust Fault Protection | Combines high-side/low-side OCP, input/output OVP, thermal shutdown, and undervoltage lockout - eliminates need for external supervisors in most designs. |
| Flexible Compensation | Internal compensation (200Ω to GND on COMP) covers most applications; external option allows optimization for transient response or specific output capacitor ESR. |
| Small Footprint | 3.5mm × 3.5mm TQFN with 0.8mm height fits dense PCB layouts typical in 1U servers, storage blades, and compact networking modules. |
Applications
| Server Point-of-Load | Industrial PLC Power |
|---|---|
|
Use Scenario: Regulating 1.8V/12A for FPGA I/O banks in 1U rack-mounted servers with strict thermal envelope. IC Role / Device Role / Timing Role: Primary synchronous buck POL converter with integrated MOSFETs and fast transient response. Use Value: Delivers >92% efficiency at full load while maintaining <±1% output regulation across line/load/temperature, reducing heatsink requirements. |
Use Scenario: Generating 5V/10A for programmable logic controller (PLC) backplane and I/O module power. IC Role / Device Role / Timing Role: High-reliability DC-DC regulator with input OVP and thermal shutdown for harsh factory environments. Use Value: Withstands 18V transients and shuts down cleanly at 160°C, eliminating risk of cascading failure in unventilated enclosures. |
| Telecom Line Card | Test Equipment Supply |
|
Use Scenario: Providing 3.3V/14A to ASICs on high-speed telecom line cards requiring low-noise, tightly regulated supply. IC Role / Device Role / Timing Role: Synchronous buck regulator with 600kHz operation and external sync capability for EMI reduction. Use Value: Achieves <15mVpp output ripple at full load and supports synchronization to system clock to suppress beat frequencies. |
Use Scenario: Powering precision analog front-ends in automated test equipment (ATE) where load steps exceed 10A/µs. IC Role / Device Role / Timing Role: Fast-transient-response POL regulator with peak-current-mode control and 3ms soft-start. Use Value: Maintains <±15mV output deviation during 0–14A load steps, ensuring measurement integrity without post-regulation LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP28164GQ-0000-Z | 12A rated, 4.5–18V input, 500kHz fixed frequency, no external sync, smaller 3x3mm QFN | Lacks frequency synchronization and MODE-selectable OCP; optimized for cost-sensitive mid-power applications | Choose when 12A suffices and EMI coordination via sync is unnecessary; lower BOM cost but reduced fault-policy flexibility |
| TPS546B24RVFT | 15A rated, 4–18V input, PMBus interface, digital control, 3.5×3.5mm VQFN | Includes telemetry, margining, and adaptive loop compensation; requires firmware integration and PMBus infrastructure | Choose when digital monitoring, dynamic voltage scaling, or remote configuration are required - adds complexity but enables smart power management |
Compared with MP28164GQ-0000-Z and TPS546B24RVFT, the ISL85014FRZ-T offers unique analog configurability (SYNC/MODE/FREQ pins), higher 14A current rating than the MP28164, and simpler implementation than the PMBus-based TPS546B24 - making it optimal for analog-controlled, high-current, thermally constrained POLs.
Availability
ISL85014FRZ-T is available at Aetrix Electronics and suitable for servers and cloud infrastructure POLs, industrial PLCs and factory automation systems, and telecom and networking equipment requiring stable component supply and long-term manufacturability.
Supply support for ISL85014FRZ-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 specializing in microcontrollers, analog power management, and timing solutions for industrial, automotive, and infrastructure markets.
The ISL85014FRZ-T belongs to Renesas' high-current monolithic buck regulator product line, designed specifically for space-constrained, high-efficiency point-of-load conversion in datacenter, telecom, and industrial control systems.
FAQ
What is the maximum recommended output current for the ISL85014FRZ-T?
The ISL85014FRZ-T is rated for 14A continuous output current under specified thermal conditions (θJA = 33°C/W, TA ≤ +85°C). Derating is required above ambient temperatures or with insufficient PCB copper area; full 14A operation assumes proper thermal design using the exposed pad and ≥4 thermal vias to inner ground planes. The device's 20A high-side OCP threshold provides headroom for short-duration transients.
How does the MODE pin affect overcurrent protection behavior in the ISL85014FRZ-T?
The MODE pin configures the ISL85014FRZ-T's overcurrent protection response: when floated, it enters hiccup mode (150ms blanking time after eight consecutive OCP events); when tied to GND, it latches off permanently until EN is cycled. This allows system designers to match fault recovery strategy - hiccup for self-clearing faults in distributed systems, latch-off for safety-critical shutdowns requiring manual reset.
Can the ISL85014FRZ-T operate with an input voltage below 4.5V?
Yes - the ISL85014FRZ-T supports PVIN down to 3.8V, enabling use with 5V or 3.3V intermediate bus architectures. However, VIN (control supply) must remain ≥4.5V unless VDD is directly connected to VIN per datasheet guidance (for VIN = 3–5.5V). Below 4.5V on VIN, the internal LDO cannot regulate VDD reliably, risking improper startup or logic malfunction.
What is the purpose of the DNC pins (12 and 13) on the ISL85014FRZ-T?
Pins 12 and 13 on the ISL85014FRZ-T are designated "Do Not Connect" - they have no internal electrical connection and must remain unconnected and floating in the PCB layout. Routing traces to or placing solder mask openings on these pins may cause unintended coupling or assembly defects; Renesas explicitly prohibits any connection to ensure functional reliability and thermal performance.
Does the ISL85014FRZ-T support prebias start-up, and how is it implemented?
Yes, the ISL85014FRZ-T supports prebias start-up: it safely starts into an output already biased up to the target VOUT without forcing reverse current. During startup, both high-side and low-side MOSFETs remain off until the internal soft-start voltage exceeds the FB voltage, allowing the output to settle naturally. This avoids inrush stress on downstream capacitors and enables hot-swap functionality in redundant power systems.
ISL85014FRZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 15-WFQFN
- 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):
- 3.8V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 14A
- Frequency - Switching:
- 300kHz, 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-TQFN (3.5x3.5)
ISL85014FRZ-T FAQ
1.How can I place an order for ISL85014FRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85014FRZ-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 ISL85014FRZ-T reliable?
The price and inventory of ISL85014FRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85014FRZ-T is usually 5 days.
3.What payment methods are accepted for ISL85014FRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85014FRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85014FRZ-T?
ISL85014FRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85014FRZ-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 ISL85014FRZ-T?
For technical support, including ISL85014FRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85014FRZ-T requirements.
6.How does Aetrix verify that ISL85014FRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL85014FRZ-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 ISL85014FRZ-T meets industry standards.
7.What is the process for return or replacement of ISL85014FRZ-T?
All ISL85014FRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL85014FRZ-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 ISL85014FRZ-T part is unused and in its original packaging.
Return procedure for ISL85014FRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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