My Inquiry
My Account
Renesas ISL1801IVZ
- Part No.:
- ISL1801IVZ
- Manufacturer:
- Renesas
- Category:
- Special Purpose Regulators
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
ISL1801IVZ.pdf
- Description:
- IC REG CONV SOLAR 4OUT 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ISL1801IVZ from Renesas (formerly Intersil) is a highly integrated power management IC (PMIC) designed specifically for solar microconverter systems. It integrates dual buck switching regulators (9V–90V HV input, 10V output; 6V–14V LV input, 3.3V programmable output), dual high-speed MOSFET drivers (2A source / 5A sink), precision current-sense amplifier (±1000µV offset), two protection comparators, and watchdog timer - all in a single 48-lead TSSOP package.
For engineers reviewing the ISL1801IVZ datasheet, ISL1801IVZ pinout, ISL1801IVZ application, or ISL1801IVZ equivalent, this PMIC delivers complete bias, gate drive, sensing, and protection functionality for solar optimizer and micro-inverter topologies - eliminating discrete support components while maintaining design flexibility for buck, boost, or buck-boost configurations.
Technical Context
The ISL1801IVZ implements constant-on-time (COT) control for both switching regulators, enabling fast transient response and stable operation across wide input voltage ranges (9–90V for VR1, 6–14V for VR2). Its dual synchronous buck architecture uses integrated upper/lower MOSFETs (rDS(ON) ≤ 3.2Ω / 2Ω for HV stage; ≤ 2Ω / 2Ω for LV stage) with programmable on-time via external resistors (TON1/Ton2).
It features dedicated analog circuitry including a low-drift current-sense amplifier (130kHz GBW, 64nV/√Hz noise), two rail-to-rail comparators (0.2–0.55µs propagation delay), and independent fault latching via LATCHRPT - all referenced to VDDREF (clamped to VOUT2) for robust MCU interfacing in noisy solar environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| HV Input Range | 9V to 90V - supports full PV module string voltage range without external pre-regulation |
| HV Regulator Output | 10V @ ≥120mA - powers gate drivers and secondary regulator; includes OCP/OVP/OTP |
| LV Regulator Output | 3.3V programmable @ ≥200mA - supplies MCU core; includes PGOOD, soft-start, and OCP |
| Gate Driver Rating | 14V max, 2A peak source / 5A peak sink - drives external N-MOSFETs in buck/flyback/boost topologies |
| Current Sense Amp | ±1000µV offset, 130kHz GBW - enables accurate shunt-based current monitoring at microconverter output |
| Watchdog Timer | RC-programmable timeout - resets MCU via PGOOD2 if WDI clock stops, ensuring system-level fault recovery |
| Operating Temp | −40°C to +85°C - qualified for outdoor solar deployment in harsh ambient conditions |
Pinout & Package
ISL1801IVZ is housed in a 48-lead TSSOP package (M48.240), thermally optimized for high-voltage DC-DC conversion with separate power and analog ground domains (PGND1/PGND2/PGND3/PGND4, AGND, SGND, GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1 | HV input supply | Accepts 9–90V PV input; feeds HV regulator and start-up LDO |
| VCC1 | HV bias rail | 10V LDO output; powers HV circuitry until switching regulator stabilizes |
| PHASE1 | HV power stage node | Connects to HV inductor; requires external bootstrap capacitor on BOOT1 |
| DRIVE3 | High-speed gate driver output | Drives external N-MOSFET; includes peak current limit via OCSET3 resistor |
| AMP+, AMP−, AMPO | Current sense interface | Differential inputs and buffered output for precision shunt current measurement |
| LATCHRPT | Fault reporting signal | Open-drain output pulled low on overcurrent, overvoltage, or thermal fault - latched until RPWM3 reset |
Key Features
| Feature | Design Value |
|---|---|
| Dual COT buck regulators | Enables stable, fast-response regulation across wide input ranges without compensation components |
| Integrated 14V gate drivers | Eliminates need for external driver ICs; supports direct connection to N-MOSFET gates in microconverter power stages |
| Programmable peak current limit | OCSET3 pin allows precise setting of Phase3 overcurrent threshold using a single external resistor |
| Preload-controlled enable logic | PRELOAD pin ensures LV regulator only starts when HV stage delivers sufficient power - prevents brownout during weak irradiance |
| VDDREF-clamped I/O | All digital outputs (CMP1O, LATCHRPT, PGOOD2) reference VDDREF tied to VOUT2 - guarantees safe MCU interface levels |
Applications
| Solar Power Optimizer | Solar Micro-Inverter |
|---|---|
Use Scenario: Mounted per-PV module to maximize energy harvest under partial shading or mismatched panels. IC Role / Device Role / Timing Role: PMIC provides isolated 10V gate drive, 3.3V MCU supply, real-time current sensing, and fault latching for local MPPT control. Use Value: Enables module-level DC-DC conversion with <120mA HV output and <200mA LV output - sufficient for full control stack without external regulators. |
Use Scenario: Integrated into compact AC-module designs converting DC from single PV panel to grid-compliant AC. IC Role / Device Role / Timing Role: Serves as central power controller: HV regulator powers half-bridge drivers; LV regulator powers DSP/FPGA; comparators monitor overvoltage/overcurrent. Use Value: Dual COT regulators deliver fast transient response needed for dynamic MPPT algorithms; watchdog ensures fail-safe shutdown during communication loss. |
| Solar Charge Controller | Telecom Power Supply |
Use Scenario: Used in off-grid battery charging systems where PV input varies widely (e.g., 12V–72V nominal arrays). IC Role / Device Role / Timing Role: Manages multi-stage charging by regulating HV input to intermediate bus, then stepping down to battery voltage with precise current limiting. Use Value: Integrated current-sense amplifier and dual comparators allow accurate charge current monitoring and overcharge protection without external op-amps or references. |
Use Scenario: Powers remote telecom equipment (e.g., small-cell base stations) from high-voltage DC distribution lines (48V–90V). IC Role / Device Role / Timing Role: Converts HV DC input to isolated 3.3V/5V rails for control logic and 10V for auxiliary converters; watchdog monitors system health. Use Value: 90V absolute max rating on VIN1 and robust thermal design (θJA = 58°C/W) ensure reliability in unregulated telecom power environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4312-AEC1 | Automotive-grade 100V buck controller (no integrated MOSFETs); requires external high-side FET and gate driver | Targets automotive BMS and ADAS; lacks integrated current-sense amp, comparators, and watchdog | Choose when higher voltage margin (100V) and AEC-Q100 qualification are required, but accept added component count and missing protection functions |
| UCC28911 | 700V flyback controller with integrated MOSFET; no secondary regulator, no current-sense amp, no comparators | Designed for AC/DC offline SMPS; lacks solar-specific features like preload enable and dual-regulator sequencing | Choose for universal-input AC/DC conversion where HV isolation is mandatory, but not suitable for solar microconverter bias and control integration |
Compared with MPQ4312-AEC1 and UCC28911, the ISL1801IVZ uniquely combines HV/LV dual regulation, gate driving, sensing, and protection in one package - reducing BOM count by >12 components versus discrete implementations while delivering solar-optimized startup and fault handling.
Availability
ISL1801IVZ is available at Aetrix Electronics and suitable for solar power optimizers, micro-inverters, and telecom power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL1801IVZ 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 acquired Intersil in 2017 and maintains full product support, documentation, and manufacturing continuity for legacy Intersil PMICs including the ISL1801 series.
The ISL1801 product line was engineered specifically for distributed solar energy harvesting - integrating all essential power, sensing, and protection functions needed for module-level DC-DC conversion in harsh outdoor environments.
FAQ
What is the maximum input voltage rating for ISL1801IVZ?
The ISL1801IVZ has an absolute maximum VIN1 rating of 100V, with recommended operating range of 9V to 90V. This allows direct connection to commercial PV modules without external voltage clamping, supporting up to 90V DC input while maintaining safety margin per IEC 61215 and UL 1703 standards. The device includes internal overvoltage protection triggered at FB1 > 2.4V.
Does ISL1801IVZ support both buck and boost topologies?
Yes, the ISL1801IVZ supports buck, boost, and buck-boost microconverter topologies through its dual gate drivers (DRIVE3 and BDRIVE) and flexible PHASEx pin configuration. DRIVE3 controls the main power stage (buck/flyback), while BDRIVE enables auxiliary switching paths. Application schematics in FN8259 Rev 1.00 confirm use in all three configurations with appropriate external magnetics and layout.
How does the PRELOAD function work in ISL1801IVZ?
The PRELOAD pin on ISL1801IVZ implements a power-good interlock: a resistor from PRELOAD to VOUT1 creates a minimum load on the HV regulator. Only when this load is successfully driven - indicating sufficient PV input power - does the IC enable the LV regulator (VR2). This prevents unstable startup during low-light conditions and avoids brownout of the MCU supply.
Can ISL1801IVZ operate without external bootstrap capacitors?
No - ISL1801IVZ requires external bootstrap capacitors on both BOOT1 (HV regulator) and BOOT2 (LV regulator). These capacitors provide gate drive voltage above the phase node potential for the internal high-side N-MOSFETs. The datasheet specifies ceramic capacitors (e.g., 100nF X7R) placed close to BOOT1/BOOT2 pins with low-ESR paths to PHASE1/PHASE2.
What is the purpose of the LATCHRPT pin on ISL1801IVZ?
The LATCHRPT pin on ISL1801IVZ is an open-drain fault-reporting output that pulls low when any protected event occurs - including overcurrent on PHASE3, overvoltage on either regulator, or thermal shutdown. It remains latched until reset via RPWM3, allowing the MCU to detect and respond to faults even after transient recovery. This ensures no fault condition goes unlogged in solar field deployments.
ISL1801IVZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Converter, Solar Power
- Voltage - Input:
- 9V ~ 90V
- Number of Outputs:
- 4
- Voltage - Output:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSSOP
ISL1801IVZ FAQ
1.How can I place an order for ISL1801IVZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL1801IVZ 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 ISL1801IVZ reliable?
The price and inventory of ISL1801IVZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL1801IVZ is usually 5 days.
3.What payment methods are accepted for ISL1801IVZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL1801IVZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL1801IVZ?
ISL1801IVZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL1801IVZ 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 ISL1801IVZ?
For technical support, including ISL1801IVZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL1801IVZ requirements.
6.How does Aetrix verify that ISL1801IVZ is sourced from the original manufacturer or authorized distributors?
All ISL1801IVZ 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 ISL1801IVZ meets industry standards.
7.What is the process for return or replacement of ISL1801IVZ?
All ISL1801IVZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL1801IVZ, 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 ISL1801IVZ part is unused and in its original packaging.
Return procedure for ISL1801IVZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL1801IVZ Tags
-
TPS51206DSQR
Texas Instruments
-
TPS51200DRCR
Texas Instruments
-
TPS51200DRCT
Texas Instruments
-
TPS62740DSSR
Texas Instruments
-
TPS51100DGQR
Texas Instruments
-
NCP51200MNTXG
onsemi
-
NCP51400MNTXG
onsemi
-
RT9026GSP
Richtek USA Inc.
-
LP2998MRX/NOPB
Texas Instruments
-
TPS51200QDRCRQ1
Texas Instruments
-
DPA423GN-TL
Power Integrations
-
LM10011SD/NOPB
Texas Instruments
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…
