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Renesas ZL2102ALAFT7A
- Part No.:
- ZL2102ALAFT7A
- Manufacturer:
- Renesas
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
ZL2102ALAFT7A.pdf
- Description:
- IC REG BUCK PROG 6A 36QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,996
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Product details
Overview
ZL2102ALAFT7A from Intersil is a digital integrated synchronous step-down DC/DC regulator delivering up to 6A continuous output current, operating from 4.5V–14V input and regulating 0.54V–5.5V output with ±1% set-point accuracy and auto-compensation for fast transient response. It integrates high- and low-side N-channel MOSFETs (rDS(ON) = 60 mΩ / 43 mΩ), supports SMBus/PMBus communication, and targets point-of-load power delivery in FPGA, ASIC, and DSP supplies.
For engineers reviewing the ZL2102ALAFT7A datasheet, ZL2102ALAFT7A pinout, ZL2102ALAFT7A application, or ZL2102ALAFT7A equivalent, key selection considerations include its 36-pin 6×6 mm QFN package with exposed thermal pad, hardware-configurable switching frequency (200–1000 kHz), factory-calibrated voltage/current sensing, and internal nonvolatile memory for configuration retention.
Technical Context
The ZL2102ALAFT7A implements a voltage-mode synchronous buck architecture with integrated dual N-channel MOSFETs and a mixed-signal PWM control loop combining analog error amplification with digital compensation filtering. Its Digital-DC™ architecture enables real-time parameter capture via Snapshot™ and full PMBus command support (70+ commands) for dynamic reconfiguration without firmware.
It features three internal LDOs (7V VR, 5V VRA, 2.5V V2P5), dedicated power-ground (PGND) and signal-ground (SGND) separation, and phase-spreading capability via DDC bus interoperability with other Intersil Digital-DC devices - all managed through hardware pin strapping or SMBus interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6 A continuous RMS; supports peak currents up to 9 A for short transients without derating. |
| Input Voltage Range | 4.5 V to 14 V; accommodates 12 V intermediate bus systems with margin for ripple and drop. |
| Output Voltage Range | 0.54 V to 5.5 V; digitally adjustable in ±2 mV steps via PMBus for precision point-of-load regulation. |
| Switching Frequency | 200 kHz to 1000 kHz; selectable via SYNC pin strap or SMBus command for EMI optimization and efficiency trade-off. |
| Efficiency | Up to 90%; achieved by integrated MOSFETs with rDS(ON) ≤ 60 mΩ (high-side) and ≤ 43 mΩ (low-side) at rated conditions. |
| Accuracy | ±1% output voltage set-point accuracy across line, load, and temperature (−40°C to +125°C junction). |
| Protection Features | Includes UVLO (configurable 4.5–16 V), OVP, OCP (±3% threshold accuracy), OTP (125°C trip, 15°C hysteresis), and prebias start-up. |
Pinout & Package
Package: 36-lead 6 mm × 6 mm QFN with exposed thermal pad (ePad), RoHS-compliant, MSL3 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Power-good indicator | Open-drain or push-pull output signaling stable regulation within ±1% band; configurable via PMBus. |
| 3 SYNC | Frequency synchronization I/O | Configures internal oscillator or accepts external clock (200–1000 kHz); pin-strapped at startup. |
| 4 VSET | Output voltage select | Sets nominal VOUT and VOUT_MAX thresholds using resistor divider or logic levels; factory calibrated. |
| 13 VSEN | Output voltage sense input | High-impedance feedback node (110–200 µA bias) for remote sensing; connects directly to load point. |
| 20–25 SW | Switch node outputs | Six parallel switch-node terminals reduce parasitic inductance and thermal resistance for 6 A operation. |
| ePad | Thermal ground | Exposed copper pad tied to SGND; mandatory for thermal performance (θJC = 1.7°C/W). |
Key Features
| Feature | Design Value |
|---|---|
| Auto-compensation | Digitally adaptive loop tuning eliminates manual compensation design; ensures stability across component tolerances and load steps. |
| Internal nonvolatile memory | Stores full configuration (voltage, frequency, sequencing, protection thresholds) for immediate operation after power-up-no host initialization required. |
| Snapshot™ parametric capture | Captures real-time waveforms (VOUT, IOUT, temperature) during fault events or transients for post-event root-cause analysis. |
| Digital-DC™ bus (DDC) | Enables synchronized multi-phase operation and fault spreading across multiple ZL2102 or compatible Intersil regulators without external timing circuitry. |
| Hardware pin-strapping | Configures 9 functions-including UVLO, soft-start delay/ramp, SMBus address, and sequencing-using resistors or logic levels, eliminating firmware dependency. |
Applications
| Server VR12 Core Supply | Telecom Line Card Power |
|---|---|
|
Use Scenario: Regulating 1.2 V @ 6 A for multi-core CPU cores in 1U rack servers with tight thermal constraints and dynamic load steps. IC Role / Device Role / Timing Role: Primary point-of-load regulator with auto-compensation responding to 50 A/µs load transients while maintaining <±10 mV droop. Use Value: Eliminates external compensation network and reduces BOM count by integrating MOSFETs, bootstrap diode, and three LDOs. |
Use Scenario: Generating 3.3 V @ 4.5 A for packet processing ASICs on telecom line cards requiring strict sequencing with auxiliary rails. IC Role / Device Role / Timing Role: Digitally configurable sequencer and regulator; uses CFG and SS pins to define power-up order and ramp timing relative to 12 V backplane supply. Use Value: Achieves deterministic startup via hardware straps and runtime adjustment via PMBus for field firmware updates. |
| FPGA I/O Bank Supply | Industrial PLC Controller Rail |
|
Use Scenario: Delivering 1.8 V @ 5 A to FPGA I/O banks with variable loading depending on transceiver activity and protocol selection. IC Role / Device Role / Timing Role: Adaptive voltage regulator supporting margining (via MGN pin) for production test and in-system validation at ±3%. Use Value: Internal 2.5 V, 5 V, and 7 V LDOs power internal logic and analog blocks-no external bias supplies needed. |
Use Scenario: Providing 5.0 V @ 3 A for microcontroller and isolated interface ICs in DIN-rail mounted PLCs operating from 24 V DC input. IC Role / Device Role / Timing Role: Robust industrial-grade buck converter with −40°C to +125°C junction rating, OVP/UVP lockout, and thermal shutdown with 15°C hysteresis. Use Value: Meets EN 61000-4-2/4-4 immunity requirements via integrated ESD protection (2 kV HBM) and low-noise digital control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL68201IRZ-T7A | Same manufacturer, pin-compatible successor with enhanced PMBus v1.3 support, lower rDS(ON) (45/32 mΩ), and extended temperature range (−40°C to +150°C). | Supports higher ambient temperatures and tighter regulation (±0.5%) but requires updated layout for improved thermal vias under ePad. | Select ISL68201IRZ-T7A for new designs requiring extended lifetime reliability or higher efficiency at 12 V input. |
| TPS53689RTAT | Texas Instruments part; 6 A, 4.5–16 V input, supports PMBus v1.2, but lacks internal LDOs and requires external bias supplies for VDD. | Needs external 5 V and 3.3 V rails for controller bias; no integrated margining or Snapshot™ diagnostics. | Choose TPS53689RTAT only when TI ecosystem integration (e.g., Fusion Digital Power GUI) is mandated and board space allows extra LDOs. |
Compared with ISL68201IRZ-T7A and TPS53689RTAT, the ZL2102ALAFT7A offers unique integration of three internal LDOs, factory-calibrated sensing, and hardware-first configuration-reducing design cycle time for industrial and telecom applications where firmware-free deployment is critical.
Availability
ZL2102ALAFT7A is available at Aetrix Electronics and suitable for server VR12 core supplies, telecom line card power, and FPGA I/O bank regulation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ZL2102ALAFT7A 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
Intersil (now part of Renesas Electronics) is a semiconductor company specializing in high-performance analog and power management ICs for computing, communications, and industrial markets.
The ZL2102 belongs to Intersil's Digital-DC™ family, designed specifically for intelligent, self-configuring point-of-load regulation in space-constrained, thermally demanding applications where digital configurability and analog performance must coexist.
FAQ
What is the maximum continuous output current supported by the ZL2102ALAFT7A?
The ZL2102ALAFT7A delivers 6 A continuous RMS output current with thermal derating applied above +85°C ambient. Peak current capability reaches 9 A for transient loads, verified under TJ ≤ +125°C with proper PCB thermal design per AN2010 guidelines. The device maintains regulation within ±1% across this range when used with recommended 2.2 µH inductor and 200 µF output capacitance.
Does the ZL2102ALAFT7A require external compensation components?
No, the ZL2102ALAFT7A implements auto-compensation via its digital control loop, eliminating the need for external RC networks. Configuration is performed either through hardware pin strapping (FC pin) or dynamically via PMBus command WRITE_PROTECT and VOUT_COMMAND. This feature ensures loop stability across varying output capacitors, PCB parasitics, and load conditions without manual tuning.
Can the ZL2102ALAFT7A operate without SMBus communication?
Yes, the ZL2102ALAFT7A is fully functional with only hardware pin strapping-no SMBus connection required. All critical parameters (output voltage, frequency, soft-start, sequencing, UVLO) are set at power-up via multimode pins (VSET, SYNC, SS, CFG, etc.). SMBus is optional for advanced monitoring, real-time reconfiguration, or Snapshot™ data capture.
What is the purpose of the DDC pin on the ZL2102ALAFT7A?
The DDC (Digital-DC Bus) pin enables proprietary interoperability between ZL2102ALAFT7A and other Intersil Digital-DC devices, allowing synchronized switching, phase spreading, and coordinated fault response without host intervention. It operates at 3.3 V logic level with internal pull-up; no external transceiver is needed for multi-phase operation.
How is thermal management handled on the ZL2102ALAFT7A?
The ZL2102ALAFT7A uses an exposed thermal pad (ePad) soldered to SGND, achieving θJC = 1.7°C/W. Thermal overload protection triggers at +125°C junction with 15°C hysteresis. Layout must follow TB389 land pattern guidelines, including ≥6 thermal vias (0.3 mm diameter) connecting ePad to inner ground plane, and separation of PGND/SGND return paths per Figure 1 and AN2010.
ZL2102ALAFT7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 36-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-QFN (6x6)
ZL2102ALAFT7A FAQ
1.How can I place an order for ZL2102ALAFT7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ZL2102ALAFT7A 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 ZL2102ALAFT7A reliable?
The price and inventory of ZL2102ALAFT7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZL2102ALAFT7A is usually 5 days.
3.What payment methods are accepted for ZL2102ALAFT7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZL2102ALAFT7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZL2102ALAFT7A?
ZL2102ALAFT7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZL2102ALAFT7A 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 ZL2102ALAFT7A?
For technical support, including ZL2102ALAFT7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZL2102ALAFT7A requirements.
6.How does Aetrix verify that ZL2102ALAFT7A is sourced from the original manufacturer or authorized distributors?
All ZL2102ALAFT7A 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 ZL2102ALAFT7A meets industry standards.
7.What is the process for return or replacement of ZL2102ALAFT7A?
All ZL2102ALAFT7A units undergo pre-shipment inspection (PSI). If there is an issue with ZL2102ALAFT7A, 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 ZL2102ALAFT7A part is unused and in its original packaging.
Return procedure for ZL2102ALAFT7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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