My Inquiry
My Account
Renesas ISL85005FRZ-T7A
- Part No.:
- ISL85005FRZ-T7A
- Manufacturer:
- Renesas
- Package:
- 12-VFDFN Exposed Pad
- Datasheet:
-
ISL85005FRZ-T7A.pdf
- Description:
- IC REG BUCK ADJ 5A 12DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL85005FRZ-T7A from Renesas Electronics is a monolithic synchronous buck regulator with integrated 5A/18V high-side and low-side MOSFETs, 4.5V–18V input range, fixed 500kHz switching frequency, and synchronization capability up to 2MHz. It delivers regulated DC output for point-of-load conversion in battery-powered systems and 12V rail supplies.
For engineers reviewing the ISL85005FRZ-T7A datasheet, ISL85005FRZ-T7A pinout, ISL85005FRZ-T7A application, or ISL85005FRZ-T7A equivalent, this page provides verified technical context, validated pin functions, confirmed protection features (UVLO, OVP, thermal shutdown), and real-world design values for soft-start, current limit, and efficiency across load conditions.
Technical Context
The ISL85005FRZ-T7A implements current-mode control with internal slope compensation and supports both forced Continuous Conduction Mode (FCCM) and Diode Emulation Mode (DEM) via the SYNC/MODE pin. Its integrated bootstrap diode eliminates external components while enabling reliable high-side gate drive under varying input conditions.
It features dual overcurrent protection: cycle-by-cycle high-side forward current limiting (7.8A typical) and low-side reverse current limiting (−3.3A), plus input/output overvoltage detection and thermal shutdown at 165°C. The 0.8V ±1% feedback reference enables precise output regulation from 0.8V to VIN minus losses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 18V - supports multi-cell Li-ion batteries and standard 5V/12V rails without external pre-regulation. |
| Output Current | 5A continuous - sufficient for FPGA core rails, SoC I/O supplies, and embedded processor power domains. |
| Switching Frequency | Fixed 500kHz, synchronizable 300kHz–2MHz - balances efficiency, size, and EMI in compact layouts. |
| Feedback Reference | 0.800V ±1% - enables accurate output setting down to sub-1V with minimal resistor divider error. |
| High-Side RDS(on) | 57mΩ typical at 100mA - reduces conduction loss and improves full-load efficiency above 90%. |
| Soft-Start Time | Fixed 2.3ms - limits inrush current during startup without requiring external capacitor. |
| Protection Features | Input UVLO (4.35V rising), input/output OVP, thermal shutdown (165°C), high-side OCP (7.8A), low-side reverse OCP (−3.3A) - ensures robust operation in unregulated environments. |
Pinout & Package
ISL85005FRZ-T7A uses a 12-pin 3mm × 4mm Dual Flat No-Lead (DFN) package with exposed thermal pad (EPAD) for enhanced heat dissipation in high-power-density applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SYNC/MODE) | Synchronization and mode selection | Connect to VDD for FCCM, AGND for DEM, or external clock (300kHz–2MHz) - enables dynamic efficiency optimization and system-level timing coordination. |
| 2 (PG) | Power-good open-drain output | Asserts high after 1.5ms when output reaches 85% of regulation - used for sequencing and fault monitoring in multi-rail systems. |
| 3 (EN) | Enable input | Active-high enable with 0.6V threshold and 100mV hysteresis - supports clean power-up/down control and standby management. |
| 4 (FB) | Feedback input | Negative input to error amplifier; sets output voltage via resistor divider - precision 0.8V reference ensures stable regulation across temperature. |
| 5 (COMP) | Compensation node | Connect to AGND for internal compensation or add RC network between COMP and FB for custom loop tuning - simplifies design while supporting demanding transient response. |
| 6 (AGND) | Analog ground | Return path for internal analog circuitry; internally connected to PGND - must tie to low-noise ground plane to avoid noise coupling into control loop. |
| 7,8 (PHASE) | Switch node | Drives external output inductor; connects to source of low-side FET and drain of high-side FET - critical for minimizing switching loop inductance and EMI. |
| 9,10 (VIN) | Main power input | Supplies high-side driver and internal LDO; requires local ceramic decoupling to PGND - handles up to 18V input with robust UVLO and OVP protection. |
| 11 (VDD) | Internal LDO output | 5V regulated supply for internal logic and drivers; connect 1µF capacitor to ground - improves efficiency when VIN > 5.5V and enables direct connection if VIN = 3–5.5V. |
| 12 (BOOT) | Bootstrap supply | Floating gate drive supply for high-side MOSFET; requires 0.1µF capacitor to PHASE - integrated bootstrap diode eliminates external diode requirement. |
| (EPAD) PGND | Power ground / thermal pad | Source of low-side MOSFET and primary thermal path; connect to PCB ground plane with multiple vias - essential for maintaining junction temperature below 125°C at 5A load. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5A/18V FETs | Eliminates external power switches and reduces BOM count by ≥4 components versus controller-only solutions. |
| Diode Emulation Mode (DEM) | Enables >85% efficiency at 100mA load (12V→3.3V), extending battery runtime in light-load standby states. |
| Programmable synchronization | Allows alignment with system clocks or adjacent converters to reduce beat-frequency EMI in multi-rail designs. |
| Integrated bootstrap diode | Removes need for external bootstrap diode, reducing layout complexity and improving reliability in high-vibration environments. |
| Comprehensive protection suite | Covers input UVLO/OVP, output OVP, high-side/low-side OCP (forward/reverse), and thermal shutdown - minimizes external protection circuitry. |
Applications
| Network Equipment Power | Battery-Powered Industrial Sensors |
|---|---|
|
Use Scenario: Providing 3.3V/5A power to Ethernet PHYs and packet processors in compact access switches. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 12V backplane to processor I/O rail with tight transient response. Use Value: DEM mode maintains >87% efficiency at 200mA idle current, reducing thermal load in sealed enclosures. |
Use Scenario: Powering ARM Cortex-M7 microcontrollers and LoRa transceivers in remote environmental monitors. IC Role / Device Role / Timing Role: Main system regulator delivering 1.8V/3A from 2S Li-ion (6–8.4V) with ultra-low quiescent current (4.5mA). Use Value: Fixed 2.3ms soft-start prevents inrush-induced brownout during cold-start from depleted batteries. |
| Multi-Function Printer Engine Control | Embedded Computing DC-DC Stage |
|
Use Scenario: Supplying 5V/4A to stepper motor drivers and ASICs in compact MFP mainboards. IC Role / Device Role / Timing Role: High-current buck stage replacing discrete controllers + MOSFETs to meet space-constrained thermal budgets. Use Value: Integrated 57mΩ/40mΩ RDS(on) FETs achieve 92% peak efficiency at 5A, reducing heatsink requirements by 35%. |
Use Scenario: Generating 1.2V/4A core voltage for Xilinx Zynq-7000 SoCs in industrial HMIs. IC Role / Device Role / Timing Role: Synchronous buck regulator with FCCM/DEM selectability for dynamic power-state transitions. Use Value: SYNC/MODE pin allows firmware-controlled mode switching to optimize efficiency across active/idle states without hardware change. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL85005AFRZ-T7A | Fixed 500kHz frequency; programmable soft-start via SS pin (3.5µA charging current); no SYNC capability. | Preferred where soft-start time must be extended beyond 2.3ms (e.g., large output capacitance >200µF) and synchronization is unnecessary. | Select ISL85005AFRZ-T7A only if adjustable soft-start is required and system clock sync is not needed. |
| MP2451DT-LF-Z | 3A rated; 2MHz max frequency; no DEM mode; 0.8V reference; smaller 8-pin SOIC package. | Suitable for lower-current applications (<3A) where board area is constrained and light-load efficiency is secondary. | Choose MP2451DT-LF-Z only for cost-sensitive, space-limited designs with ≤3A load and no DEM requirement. |
Compared with ISL85005FRZ-T7A, ISL85005AFRZ-T7A trades synchronization flexibility for programmable soft-start, while MP2451DT-LF-Z offers higher switching frequency and smaller footprint at the expense of current rating and light-load efficiency modes.
Availability
ISL85005FRZ-T7A is available at Aetrix Electronics and suitable for network equipment power, battery-powered industrial sensors, and multi-function printer engine control requiring stable component supply and long-term production support.
Supply support for ISL85005FRZ-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 industrial, automotive, and communications markets.
The ISL85005FRZ-T7A belongs to Renesas' high-efficiency monolithic buck regulator product line, designed specifically for compact, high-reliability DC-DC conversion in space- and thermal-constrained embedded systems.
FAQ
What is the maximum input voltage rating for the ISL85005FRZ-T7A?
The ISL85005FRZ-T7A has an absolute maximum input voltage rating of +24V on VIN, PHASE, and related pins. However, its recommended operating input voltage range is strictly 4.5V to 18V per datasheet specifications. Operation above 18V may trigger input overvoltage protection at 19–20V and is not supported for continuous use. Always maintain VIN within 4.5V–18V for reliable ISL85005FRZ-T7A operation.
Does the ISL85005FRZ-T7A support Diode Emulation Mode (DEM)?
Yes, the ISL85005FRZ-T7A supports Diode Emulation Mode (DEM) via the SYNC/MODE pin. When this pin is pulled to AGND, the device enters DEM, which discontinues low-side FET conduction during light-load conditions to improve efficiency. This feature is confirmed in the ISL85005FRZ-T7A datasheet (FN8871 Rev.2.00, Page 1) and distinguishes it from the ISL85005A variant, which operates only in Forced CCM.
What is the default soft-start time of the ISL85005FRZ-T7A?
The ISL85005FRZ-T7A has a fixed 2.3ms soft-start time, as specified in the datasheet's Electrical Specifications table (Page 8). Unlike the ISL85005A variant, it does not support programmable soft-start - the timing is internally set and requires no external capacitor. This value is guaranteed across −40°C to +125°C junction temperature.
Can the ISL85005FRZ-T7A be synchronized to an external clock?
Yes, the ISL85005FRZ-T7A supports external clock synchronization through its SYNC/MODE pin. It accepts external clock signals from 300kHz to 2MHz with positive-edge triggering, as documented in the Absolute Maximum Ratings and Electrical Specifications sections (Pages 7–8). This capability enables EMI reduction and timing coordination in multi-converter systems.
What package type and thermal characteristics does the ISL85005FRZ-T7A use?
The ISL85005FRZ-T7A uses a 12-pin 3mm × 4mm Dual Flat No-Lead (DFN) package with exposed thermal pad (EPAD), per Package Outline Drawing (Page 22) and Ordering Information (Page 5). Its thermal resistance is θJA = 41°C/W and θJC = 3°C/W, enabling efficient heat transfer to the PCB ground plane when properly mounted with multiple thermal vias under the EPAD.
ISL85005FRZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad
- 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):
- 4.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 5A
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-DFN (4x3)
ISL85005FRZ-T7A FAQ
1.How can I place an order for ISL85005FRZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL85005FRZ-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 ISL85005FRZ-T7A reliable?
The price and inventory of ISL85005FRZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL85005FRZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL85005FRZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL85005FRZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL85005FRZ-T7A?
ISL85005FRZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL85005FRZ-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 ISL85005FRZ-T7A?
For technical support, including ISL85005FRZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL85005FRZ-T7A requirements.
6.How does Aetrix verify that ISL85005FRZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL85005FRZ-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 ISL85005FRZ-T7A meets industry standards.
7.What is the process for return or replacement of ISL85005FRZ-T7A?
All ISL85005FRZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL85005FRZ-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 ISL85005FRZ-T7A part is unused and in its original packaging.
Return procedure for ISL85005FRZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL85005FRZ-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…
