My Inquiry
My Account
Renesas ISL85009FRZ-T7A
- Part No.:
- ISL85009FRZ-T7A
- Manufacturer:
- Renesas
- Package:
- 15-WFQFN
- Datasheet:
-
ISL85009FRZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 9A 15TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,217
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL85009FRZ-T7A from Renesas Electronics is a monolithic synchronous buck regulator delivering 9A continuous output current from a 3.8V–18V input, featuring peak-current-mode control, integrated high-side (17mΩ) and low-side (8.5mΩ) MOSFETs, and selectable 300/600kHz switching frequency-designed for point-of-load regulation in server VRMs and telecom power systems.
For engineers reviewing the ISL85009FRZ-T7A datasheet, ISL85009FRZ-T7A pinout, ISL85009FRZ-T7A application, or ISL85009FRZ-T7A equivalent, key selection considerations include its internal compensation support, hiccup/latch-off OCP configurability via MODE pin, thermal shutdown at 160°C, and compatibility with prebiased start-up in space-constrained industrial POL designs.
Technical Context
The ISL85009FRZ-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 voltage regulation via 0.6V reference error amplifier with internal 30pF/800kΩ (600kHz) or 30pF/1200kΩ (300kHz) compensation networks.
It supports three operational modes: forced CCM (SYNC float), diode emulation mode (SYNC = GND), and external synchronization (100–1000kHz). Protection logic includes independent high-side (15A typ) and low-side (21A forward, –7.5A reverse) OCP, input overvoltage lockout (20.5V rising), output overvoltage clamp (116% of VOUT), and thermal shutdown with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.8V to 18V on PVIN; 4.5V to 18V on VIN - enables direct use with 12V intermediate bus or wide-range industrial supplies. |
| Output Current | 9A continuous - sufficient for FPGA core rails or ASIC I/O domains without external current sharing. |
| Switching Frequency | Selectable 300kHz (FREQ = GND) or 600kHz (FREQ = float); sync-capable up to 1MHz - balances efficiency vs. size trade-offs in compact PCB layouts. |
| Feedback Reference | 0.6V ±1.75% (0.5895–0.6105V) - allows precise low-voltage regulation down to 0.6V with standard resistor dividers. |
| MOSFET rDS(ON) | High-side: 17mΩ, Low-side: 8.5mΩ @ 900mA - minimizes conduction loss and enables >90% efficiency at 5V/6A (VIN=12V). |
| Protection Features | Integrated hiccup/latch-off OCP (via MODE pin), input/output OVP, thermal shutdown (160°C), and prebias start-up - reduces need for external fault management circuitry. |
| Package | 15-lead 3.5mm × 3.5mm TQFN, 0.8mm max height - supports high-density routing and thermal relief via exposed pad vias. |
Pinout & Package
ISL85009FRZ-T7A is housed in a RoHS-compliant 15-lead 3.5mm × 3.5mm TQFN package with exposed thermal pad. The package provides θJA = 33°C/W and θJC = 1.2°C/W, enabling high-power density operation in thermally constrained environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SYNC | Synchronization & light-load mode control | Float = Forced CCM; GND = Diode Emulation Mode; external clock input (100–1000kHz) - enables EMI reduction and system-level timing coordination. |
| 2 MODE | OCP scheme selection | Float = Hiccup mode (150ms blanking); GND = Latch-off - configures fault recovery behavior per system safety requirements. |
| 3 FREQ | Default switching frequency select | Float = 600kHz; GND = 300kHz - sets internal oscillator without external components for simplified BOM. |
| 4 PG | Power-good open-drain flag | Asserts high when FB is 87–116% of target - provides sequenced enable signaling to downstream logic or processors. |
| 5 VDD | Internal LDO decoupling | Supplies 4.3–5.5V to analog/digital blocks; requires 2.2µF ceramic cap - ensures stable bias under load transients. |
| 6 BOOT | High-side gate driver bootstrap | Connect 0.1µF capacitor to PHASE - sustains gate drive voltage during high-side conduction. |
| 7 GND | Power ground reference | Must connect to board ground plane via multiple vias - critical for noise immunity and thermal dissipation. |
| 8 PHASE | Switch node | Connects to inductor and internal FET sources/drains - high dv/dt node requiring minimized trace area and guard ring. |
| 9 PVIN | Main power stage input | Accepts 3.8–18V; requires local ceramic decoupling - feeds high-current path to internal MOSFETs. |
| 10 FB | Voltage feedback input | Inverting input to 0.6V reference EA - sets output via R1/R2 divider; leakage <10nA preserves accuracy. |
| 11 COMP | Error amplifier output | Connect 200Ω to GND for internal compensation - eliminates external compensation network in most applications. |
| 12,13 DNC | No-connect terminals | Must remain unconnected - floating pins prevent parasitic coupling or latch-up risk. |
| 14 EN | Enable control | Active-high; threshold 0.6V with 100mV hysteresis - supports precise power sequencing with RC filtering. |
| 15 VIN | Control circuit input | 4.5–18V supply for logic/LDO; requires 1µF ceramic cap - powers internal regulators independent of PVIN path. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Monolithic 9A buck with matched 17mΩ/8.5mΩ FETs - eliminates external MOSFET selection, layout, and gate drive design effort. |
| Flexible Frequency Control | 300kHz/600kHz default + 100–1000kHz sync - enables EMI spread-spectrum tuning and multi-rail synchronization. |
| Configurable Overcurrent Protection | Hiccup (150ms reset) or latch-off via MODE pin - aligns protection behavior with system-level fault tolerance policies. |
| Prebias Start-up Support | Starts into existing output voltage without reverse current - essential for hot-swap and redundant power architectures. |
| Thermally Optimized Package | 3.5mm × 3.5mm TQFN with 1.2°C/W θJC - delivers 9A output in <12mm² footprint while maintaining <125°C junction under full load. |
| Internal Compensation | 30pF/800kΩ (600kHz) or 30pF/1200kΩ (300kHz) network - removes need for external compensation components in standard designs. |
Applications
| Server Point-of-Load Regulation | Industrial PLC Power Management |
|---|---|
|
Use Scenario: Delivering 1.8V/6A to FPGA fabric in 1U rack-mounted server with strict thermal envelope. IC Role / Device Role / Timing Role: Primary POL regulator converting 12V intermediate bus to core voltage with tight transient response. Use Value: Integrated 17mΩ/8.5mΩ FETs and 600kHz operation achieve >92% efficiency at full load, reducing heatsink requirements by 35% versus discrete solutions. |
Use Scenario: Generating 5V/3A for I/O modules in factory automation controller operating at 70°C ambient. IC Role / Device Role / Timing Role: High-reliability DC-DC converter with latch-off OCP and thermal shutdown for safety-critical control logic. Use Value: 160°C thermal shutdown with 10°C hysteresis prevents catastrophic failure during extended overload, meeting IEC 61000-6-4 emission limits. |
| Telecom Line Card Power | Test Equipment DC Supply |
|
Use Scenario: Providing 3.3V/9A to packet processing ASIC in carrier-grade router with strict EMI compliance. IC Role / Device Role / Timing Role: Synchronized buck regulator locked to system clock to suppress switching noise in sensitive RF sections. Use Value: External sync capability (100–1000kHz) enables deterministic noise placement outside 150kHz–30MHz CISPR 22 bands. |
Use Scenario: Programmable 1.2V/5A output in benchtop power analyzer requiring low-noise, repeatable voltage setting. IC Role / Device Role / Timing Role: Precision-regulated source with 0.6V ±1.75% reference and prebias start-up for calibration stability. Use Value: 0.6V reference tolerance and <10nA FB leakage ensure <±1% output accuracy across temperature, eliminating recalibration cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL85012FRZ-T7A | 12A rated output; identical pinout and feature set; higher rDS(ON) (19mΩ HS / 9.5mΩ LS) | Supports higher current loads (e.g., GPU cores) but requires larger input capacitance and thermal margin | Select when >9A continuous load or future-proofing headroom is required; same PCB layout usable. |
| MP2451DT-LF-Z | 3A rated; 4.5–36V input; no integrated low-side FET; external compensation only; smaller SOIC-8 package | Targeted at lower-power industrial sensors or IoT nodes where cost and size outweigh current needs | Choose for cost-sensitive, sub-5A applications with wider input range; not drop-in due to different pin count and topology. |
Compared with ISL85009FRZ-T7A, ISL85012FRZ-T7A offers higher current capacity in identical form factor, while MP2451DT-LF-Z trades integration and performance for cost and input voltage range-making ISL85009FRZ-T7A optimal for 9A POLs demanding minimal BOM and thermal efficiency.
Availability
ISL85009FRZ-T7A is available at Aetrix Electronics and suitable for servers and cloud infrastructure POLs, industrial PLCs, and telecom line card power systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for ISL85009FRZ-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 ISL85009FRZ-T7A belongs to Renesas' high-efficiency monolithic buck regulator product line, engineered specifically for space-constrained, high-current point-of-load conversion in cloud infrastructure and industrial automation systems.
FAQ
What is the maximum allowable input voltage for ISL85009FRZ-T7A?
The ISL85009FRZ-T7A specifies absolute maximum ratings of +22V for PVIN and VIN pins. However, its input overvoltage protection triggers at 20.5V (rising edge), disabling switching until voltage falls below 19.5V. For reliable operation, maintain PVIN ≤18V and VIN ≤18V per recommended conditions. Exceeding 18V risks permanent damage despite OVP activation.
Does ISL85009FRZ-T7A support prebias start-up, and how is it implemented?
Yes, ISL85009FRZ-T7A supports prebias start-up. During startup, both high-side and low-side MOSFETs remain off until the internal soft-start voltage exceeds the FB pin voltage, preventing reverse current flow into a precharged output. This behavior is active regardless of SYNC pin configuration and is confirmed in Figure 22–24 of the FN8918 datasheet.
How do I configure ISL85009FRZ-T7A for 300kHz operation?
To configure ISL85009FRZ-T7A for 300kHz operation, connect the FREQ pin (Pin 3) directly to GND. This selects the internal 280kHz nominal frequency (250–310kHz range). When using internal compensation, this also activates the 30pF/1200kΩ compensation network. Ensure the SYNC pin is either floated (for FCCM) or grounded (for DEM) based on light-load requirements.
What thermal derating applies to ISL85009FRZ-T7A at 85°C ambient?
At 85°C ambient with standard 2-layer PCB layout (θJA = 33°C/W), ISL85009FRZ-T7A's maximum junction temperature reaches 115°C (85 + 30) at 9A, well below the 125°C max operating limit. Derating is not required up to 85°C ambient; full 9A output remains valid. Above 85°C, output current must be reduced linearly to maintain TJ ≤125°C.
Can ISL85009FRZ-T7A be synchronized to an external clock, and what are the timing requirements?
Yes, ISL85009FRZ-T7A accepts external synchronization from 100kHz to 1MHz on the SYNC pin (Pin 1), triggered by the rising edge. The SYNC pulse high-time must exceed 100ns, and signal levels must meet TTL thresholds (low <0.5V, high >1.2V). No additional level-shifting is needed for 3.3V or 5V logic sources.
ISL85009FRZ-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:
- 9A
- 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)
ISL85009FRZ-T7A FAQ
1.How can I place an order for ISL85009FRZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85009FRZ-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 ISL85009FRZ-T7A reliable?
The price and inventory of ISL85009FRZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85009FRZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL85009FRZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85009FRZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85009FRZ-T7A?
ISL85009FRZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85009FRZ-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 ISL85009FRZ-T7A?
For technical support, including ISL85009FRZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85009FRZ-T7A requirements.
6.How does Aetrix verify that ISL85009FRZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL85009FRZ-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 ISL85009FRZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL85009FRZ-T7A?
All ISL85009FRZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL85009FRZ-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 ISL85009FRZ-T7A part is unused and in its original packaging.
Return procedure for ISL85009FRZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL85009FRZ-T7A Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
