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Renesas ISL85012FRZ-T
- Part No.:
- ISL85012FRZ-T
- Manufacturer:
- Renesas
- Package:
- 15-WFQFN
- Datasheet:
-
ISL85012FRZ-T.pdf
- Description:
- IC REG BUCK ADJ 12A 15TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,206
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Product details
Overview
ISL85012FRZ-T 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 supports prebias start-up, internal/external compensation, and operates in servers, telecom POLs, and industrial PLCs.
For engineers reviewing the ISL85012FRZ-T datasheet, ISL85012FRZ-T pinout, ISL85012FRZ-T application, or ISL85012FRZ-T equivalent, key selection considerations include its 12A load capability, thermal shutdown at 160°C, hiccup/latch-off OCP configuration via MODE pin, and compatibility with 3.5mm×3.5mm TQFN-15 footprint for space-constrained power delivery.
Technical Context
The ISL85012FRZ-T implements a peak-current-mode PWM controller with thermally compensated current sensing derived from internal MOSFET rDS(ON), enabling stable loop response across wide VIN/VOUT ranges. Its dual-path protection includes independent high-side (18A typ.) and low-side (21A forward, –7.5A reverse) current limits, plus input overvoltage lockout at 20.5V.
Operation supports three modes: forced CCM (SYNC float), diode emulation (SYNC grounded), and external synchronization (100kHz–1MHz). Internal compensation uses 30pF/800kΩ (600kHz) or 30pF/1200kΩ (300kHz) networks; external compensation allows full loop tuning via COMP–FB network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 18V - supports wide-input industrial and telecom rails without pre-regulation |
| Output Current | 12A continuous - enables single-chip POL for FPGA, ASIC, or multi-core processor core supplies |
| Switching Frequency | 300kHz or 600kHz (selectable via FREQ pin), up to 1MHz sync - balances efficiency vs. size for 0.68µH–1.5µH inductors |
| Feedback Reference | 0.600V ±10.5mV - sets precise output voltage down to 0.6V using standard resistor dividers |
| High/Low-Side rDS(ON) | 15mΩ / 7mΩ @ 900mA - minimizes conduction loss and thermal rise in compact 3.5×3.5mm package |
| OCP Schemes | Hiccup (MODE float) or latch-off (MODE grounded) - configurable fault recovery per system safety requirements |
| Thermal Shutdown | 160°C trip, 150°C hysteresis - protects die during sustained overload or poor airflow conditions |
Pinout & Package
ISL85012FRZ-T is housed in a RoHS-compliant, 15-lead 3.5mm×3.5mm TQFN package with exposed thermal pad, optimized for high-power density and PCB thermal relief via GND vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SYNC | Synchronization & mode select | Float = PWM mode; GND = DCM; external clock input (100–1000kHz) triggers rising-edge PHASE |
| 2 MODE | OCP scheme control | Float = hiccup mode (150ms blanking); GND = latch-off after eight consecutive OCP events |
| 3 FREQ | Default switching frequency | Float = 600kHz; GND = 300kHz - sets internal oscillator without external components |
| 4 PG | Power-good indicator | Open-drain output asserting when FB is 90–116% of 0.6V; requires 10–100kΩ pull-up to ≤5.5V |
| 5 VDD | LDO decoupling | Internally generated 5V supply; connect 2.2µF ceramic to GND - bypasses analog core and gate drivers |
| 6 BOOT | High-side gate driver supply | Bootstrap node requiring 0.1µF capacitor to PHASE; UV detection recharges BOOT if ΔV <2.8V |
| 7 GND | Power ground reference | Primary return for power stage; must connect to PCB ground plane via multiple vias for thermal and EMI control |
| 8 PHASE | Switch node | Connects internal HS/LS FETs and external inductor; high dv/dt node requiring tight layout and minimal trace length |
| 9 PVIN | Power stage input | Supplies HS/LS FETs; requires local ceramic decoupling (e.g., 3×22µF) close to pin for transient current handling |
| 10 FB | Voltage feedback input | Inverting input to error amplifier; sets output via resistor divider to internal 0.6V reference |
| 11 COMP | Error amplifier output | Connects to FB for internal compensation (200Ω to GND) or external network for custom loop shaping |
| 12,13 DNC | No-connect terminals | Must remain unconnected - floating pins with no internal connection or function |
| 14 EN | Enable control | Active-high logic; device enables at ~0.6V rising threshold; supports RC filtering for noise immunity |
| 15 VIN | Control circuit input | Supplies bias for control logic and internal LDO; requires 1µF ceramic decoupling; connect to PVIN if 3–5.5V |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Monolithic 12A solution with matched 15mΩ/7mΩ FETs eliminates external MOSFETs and reduces BOM count |
| Flexible Frequency Control | Selectable 300kHz/600kHz default + 100–1000kHz sync enables EMI optimization and inductor size trade-offs |
| Robust Protection Suite | Independent HS/LS OCP, input/output OVP, thermal shutdown, and BOOT UV detection ensure fault resilience |
| Prebias Start-up Support | Enables safe ramp-up into existing output voltage - critical for hot-swap and redundant power systems |
| DCM/CCM Light-Load Mode | SYNC pin selects DEM operation for improved light-load efficiency without audible noise or output ripple increase |
| Internal Compensation | 30pF/800kΩ (600kHz) or 30pF/1200kΩ (300kHz) network simplifies design for most applications without external parts |
Applications
| Server Core Voltage Regulation | Industrial PLC I/O Power |
|---|---|
|
Use Scenario: Delivering 1.8V/12A to multi-core CPU or FPGA in 1U rack server with strict thermal envelope. IC Role / Device Role / Timing Role: Primary point-of-load regulator managing dynamic load transients up to 5A/µs. Use Value: Integrated 15mΩ/7mΩ FETs and 600kHz operation enable >92% efficiency at 12A, reducing heatsink mass by 35% vs. discrete solutions. |
Use Scenario: Generating isolated 5V/3A and 3.3V/2A rails for digital I/O modules in factory automation controllers. IC Role / Device Role / Timing Role: Secondary POL converter powered from 24V intermediate bus, supporting wide input range and EMC-critical layout. Use Value: 3.8V–18V input range accommodates brownout and ripple on 12V/24V industrial buses; SYNC pin enables clock alignment across multiple rails. |
| Telecom Baseband Processing | Test Equipment DC Supply |
|
Use Scenario: Providing clean, low-noise 1.0V/12A supply to baseband ASIC in 5G small cell radio unit. IC Role / Device Role / Timing Role: High-accuracy voltage regulator with 0.6V ±10.5mV reference and PG monitoring for system health reporting. Use Value: 12A capability and 300kHz option reduce output capacitance needs while maintaining <15mV p-p ripple under full load. |
Use Scenario: Programmable bench supply channel delivering adjustable 0.6–5V at up to 12A for DUT power validation. IC Role / Device Role / Timing Role: Reconfigurable DC-DC stage with external resistor divider and soft-start control for lab-grade stability. Use Value: Prebias start-up and hiccup OCP allow safe testing of shorted or capacitive DUTs without latch-up or manual reset. |
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 | 6A rated, 4.5–18V input, fixed 500kHz, no SYNC or MODE pin, smaller 3×3mm QFN | Lower current capacity; lacks DCM mode and external sync - suitable only for sub-6A loads | Select when cost and board area outweigh need for 12A headroom or advanced protection features |
| TPS546D24RQFPR | 15A rated, 4–18V input, PMBus interface, 300–2000kHz programmable frequency, larger 5×6mm QFN | Includes digital telemetry and margining; requires external MOSFETs and more complex layout | Choose for systems needing real-time telemetry, remote configuration, or higher than 12A peak current |
Compared with MP28164GQ-0000-Z and TPS546D24RQFPR, the ISL85012FRZ-T delivers optimal balance of integration, thermal performance, and configurability for 12A analog POL designs - offering monolithic simplicity without sacrificing protection flexibility or light-load efficiency.
Availability
ISL85012FRZ-T is available at Aetrix Electronics and suitable for servers and cloud infrastructure POLs, industrial PLCs, and telecom baseband processing requiring stable component supply and long-term production continuity.
Supply support for ISL85012FRZ-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, and connectivity solutions for automotive, industrial, and datacenter markets.
The ISL85012FRZ-T belongs to Renesas' high-current monolithic buck regulator product line, designed specifically for space-constrained, high-efficiency point-of-load applications in servers, networking gear, and factory automation equipment.
FAQ
What is the maximum output current supported by the ISL85012FRZ-T?
The ISL85012FRZ-T delivers up to 12A of continuous output current under recommended operating conditions (TA ≤ +85°C, proper PCB thermal design). Peak current capability depends on ambient temperature, airflow, and layout; derating applies above +85°C ambient. The device integrates 15mΩ high-side and 7mΩ low-side MOSFETs to sustain this rating with minimal external components.
How does the ISL85012FRZ-T handle start-up into a prebiased output?
The ISL85012FRZ-T 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 already holds a voltage below the target. The fixed 3ms soft-start time applies regardless of prebias condition.
Can the ISL85012FRZ-T operate with an input voltage below 4.5V?
Yes - the ISL85012FRZ-T supports PVIN as low as 3.8V, making it compatible with Li-ion battery inputs or post-regulated 4V rails. However, VIN (control circuit supply) must remain ≥4.5V unless directly tied to PVIN (per datasheet note on page 4). For 3.8–4.5V PVIN operation, VIN must be externally supplied or derived from PVIN via a separate LDO.
What are the key differences between hiccup and latch-off OCP modes on the ISL85012FRZ-T?
Hiccup mode (MODE pin floating) disables switching for 150ms after eight consecutive overcurrent cycles, then retries; latch-off mode (MODE grounded) shuts down permanently until EN is cycled. Hiccup suits transient faults like momentary shorts; latch-off is preferred for hard failures requiring manual intervention. Both protect against sustained overloads without external circuitry.
Does the ISL85012FRZ-T require external compensation components?
No - the ISL85012FRZ-T supports internal compensation using a 200Ω resistor from COMP to GND, paired with built-in 30pF/800kΩ (600kHz) or 30pF/1200kΩ (300kHz) networks. External compensation is optional and used only when custom loop bandwidth, phase margin, or transient response is required beyond internal settings.
ISL85012FRZ-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:
- 12A
- Frequency - Switching:
- 300kHz, 600kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 15-TQFN (3.5x3.5)
ISL85012FRZ-T FAQ
1.How can I place an order for ISL85012FRZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85012FRZ-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 ISL85012FRZ-T reliable?
The price and inventory of ISL85012FRZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85012FRZ-T is usually 5 days.
3.What payment methods are accepted for ISL85012FRZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85012FRZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85012FRZ-T?
ISL85012FRZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85012FRZ-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 ISL85012FRZ-T?
For technical support, including ISL85012FRZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85012FRZ-T requirements.
6.How does Aetrix verify that ISL85012FRZ-T is sourced from the original manufacturer or authorized distributors?
All ISL85012FRZ-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 ISL85012FRZ-T meets industry standards.
7.What is the process for return or replacement of ISL85012FRZ-T?
All ISL85012FRZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL85012FRZ-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 ISL85012FRZ-T part is unused and in its original packaging.
Return procedure for ISL85012FRZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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