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Renesas ZL2102ALAFTK
- Part No.:
- ZL2102ALAFTK
- Manufacturer:
- Renesas
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
ZL2102ALAFTK.pdf
- Description:
- IC REG BUCK PROG 6A 36QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
ZL2102ALAFTK from Intersil is a digital integrated synchronous step-down DC/DC regulator delivering up to 6A continuous output current, operating from 4.5V to 14V input and regulating 0.54V–5.5V output with ±1% set-point accuracy. It integrates high- and low-side N-channel MOSFETs (rDS(ON) = 60 mΩ / 43 mΩ), supports SMBus/PMBus™ communication, and features auto compensation for fast transient response - deployed in FPGA and ASIC power delivery on telecom server boards.
For engineers reviewing the ZL2102ALAFTK datasheet, ZL2102ALAFTK pinout, ZL2102ALAFTK application, or ZL2102ALAFTK equivalent, key selection criteria include its 36-pin 6×6 mm QFN package with exposed thermal pad, factory-calibrated voltage/current sensing, internal 7V/5V/2.5V bias regulators, and support for phase spreading and Snapshot™ parametric capture in digital power systems.
Technical Context
The ZL2102ALAFTK implements a voltage-mode synchronous buck architecture with dual integrated N-channel MOSFETs and an analog-to-digital error converter feeding a digitally adjustable compensation filter. Its PWM control loop operates at 200–1000 kHz with ±5% frequency accuracy and supports hardware pin-strapped configuration of VOUT, UVLO, soft-start, sequencing, and SMBus address.
It uses SMBus™ with PMBus™ commands (over 70 supported) for real-time monitoring and reconfiguration, while the proprietary Digital-DC™ bus enables interoperability with other Intersil devices. Internal nonvolatile memory stores user configurations, and the device provides full fault protection including OVP, UVP, OCP, OTP, and prebias startup handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 6 A continuous RMS - supports high-current FPGA core rails without external MOSFETs. |
| Input Voltage Range | 4.5 V to 14 V - compatible with 5 V, 12 V intermediate bus architectures in servers and datacom. |
| Output Voltage Range | 0.54 V to 5.5 V - covers DDR, CPU core, I/O, and auxiliary rails with ±1% regulation accuracy. |
| Switching Frequency | 200 kHz to 1000 kHz - adjustable via SYNC pin or PMBus; enables optimization of size vs. efficiency. |
| Efficiency | Up to 90% - achieved via integrated low-rDS(ON) MOSFETs (HS: 60 mΩ, LS: 43 mΩ @ TJ = 25°C). |
| Communication Interface | SMBus/PMBus™ compliant - enables host-controlled margining, telemetry, sequencing, and fault logging. |
| Package | 36-pin 6×6 mm QFN with exposed thermal pad - optimized for thermal performance in high-density PCB layouts. |
Pinout & Package
Package: 36-lead 6 mm × 6 mm Exposed Pad QFN (L36.6x6A), RoHS-compliant, MSL3, -40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Power-good indicator output | Open-drain or push-pull signal confirming VOUT within ±5% regulation band; used for system power sequencing. |
| 3 SYNC | Frequency synchronization I/O | Configures internal oscillator or synchronizes to external clock; sets switching frequency during startup via pin strap. |
| 4 VSET | Output voltage select | Hardware pin-strapped setting for VOUT set-point and VOUT_MAX; enables fixed-voltage configuration without SMBus. |
| 13 VSEN | Output voltage sense input | High-impedance feedback node (110–200 µA bias) connected directly to load point for accurate remote sensing. |
| 15–19 PGND | Power ground | Low-inductance return path for internal MOSFETs and external input/output capacitors; must connect to solid ground plane. |
| 20–25 SW | Switch node output | Drives external inductor; carries high di/dt current (peak 9 A); requires tight layout to minimize EMI and losses. |
| ePad | Thermal pad / SGND | Exposed copper pad soldered to SGND plane; primary thermal path - critical for maintaining TJ ≤ 125°C at 6 A. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Power Stage | Dual N-channel MOSFETs (HS rDS(ON) = 60 mΩ, LS rDS(ON) = 43 mΩ) eliminate external switches and reduce BOM count. |
| Auto Compensation | Digitally adaptive loop compensation adjusts in real time to load/transient conditions - eliminates manual tuning and external compensation components. |
| Snapshot™ Parametric Capture | On-demand capture of real-time waveforms (VOUT, IOUT, temperature) stored in NVM - enables post-fault analysis without oscilloscope. |
| Internal Bias Regulators | Three independent LDOs (7 V/5 V/2.5 V) power internal circuitry - enables single-supply operation from 4.5–14 V without auxiliary rails. |
| Phase Spreading Support | Configurable timing offset between multiple ZL2102ALAFTK units - reduces input ripple current and minimizes bulk capacitor requirements. |
Applications
| Server Core Voltage Regulation | Telecom DSP Power Supply |
|---|---|
|
Use Scenario: Delivering tightly regulated 0.85 V @ 6 A to multi-core CPU in 1U rack server with dynamic load steps up to 3 A/µs. IC Role / Device Role / Timing Role: Primary point-of-load regulator with auto-compensated voltage-mode control and PMBus telemetry for thermal-aware throttling. Use Value: ±1% output accuracy and 90% peak efficiency maintain thermal budget; Snapshot™ captures transient excursions during stress testing. |
Use Scenario: Powering TI C6678 DSP in wireless baseband unit requiring 1.0 V/1.2 V dual-rail sequencing with margining capability. IC Role / Device Role / Timing Role: Digitally configurable dual-output regulator (via cascaded configuration) with programmable soft-start and power-good coordination. Use Value: Hardware pin-strapped sequencing and SMBus margining enable field-upgradable voltage compliance without hardware change. |
| FPGA I/O Bank Supply | ASIC Memory Interface Rail |
|
Use Scenario: Providing 1.8 V @ 4 A to Xilinx Kintex-7 FPGA I/O banks with strict noise and sequencing requirements relative to core rail. IC Role / Device Role / Timing Role: Secondary PoL regulator synchronized to core rail via DDC bus; configured for 1.8 V with 5 ms soft-start ramp. Use Value: Phase spreading across multiple ZL2102ALAFTK units reduces input capacitance by 40%; internal 2.5 V LDO powers I/O logic. |
Use Scenario: Supplying 1.35 V DDR3L memory interface on high-speed switch ASIC with <10 mV ripple requirement. IC Role / Device Role / Timing Role: High-bandwidth synchronous buck with remote VSEN sensing and 300 µs fault response for overvoltage protection. Use Value: ±2 mV PMBus-set resolution and 30 µs OVP response ensure memory stability; internal Schottky bootstrap diode improves light-load efficiency. |
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 | Same manufacturer family; 6 A rating, but uses different Digital-DC v2 architecture with enhanced telemetry and lower quiescent current (0.3 mA). | Supports higher PMBus command depth and dual-phase interleaving natively; lacks internal 2.5 V LDO for digital logic supply. | Select ISL68201IRZ when advanced telemetry, lower standby power, or multi-phase scalability are required - not drop-in compatible due to pinout and register map differences. |
| TPS546B24RVFR | Texas Instruments part; 6 A, 4.5–18 V input, supports PMBus 1.3, but no auto compensation - requires external compensation network. | Offers higher VIN max and integrated MOSFET drivers with 0.5% VOUT accuracy; no internal bias LDOs - needs external 3.3 V/1.8 V supplies. | Choose TPS546B24RVFR for wider input range and tighter accuracy where design resources allow manual loop tuning and additional bias rails. |
Compared with ISL68201IRZ and TPS546B24RVFR, the ZL2102ALAFTK delivers unique value through factory-calibrated auto compensation, integrated triple-LDO bias generation, and Snapshot™ capture - reducing validation time and eliminating external compensation components, though it lacks native multi-phase support and has narrower VIN range than the TI alternative.
Availability
ZL2102ALAFTK is available at Aetrix Electronics and suitable for server power delivery, telecom DSP supplies, and FPGA/ASIC point-of-load applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and infrastructure programs.
Supply support for ZL2102ALAFTK 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 precision analog, power management, and interface ICs for high-reliability industrial, aerospace, and communications systems.
The ZL2102ALAFTK belongs to Intersil's Digital-DC™ family - designed specifically for digitally configurable, high-efficiency point-of-load regulation in space-constrained, thermally demanding server and networking equipment.
FAQ
What is the maximum continuous output current supported by the ZL2102ALAFTK?
The ZL2102ALAFTK supports 6 A continuous RMS output current under recommended operating conditions (TA ≤ +85°C, proper PCB thermal design). Peak switch-node current is rated at 9 A, but sustained operation above 6 A requires derating per the Safe Operating Area curves in the datasheet. The device integrates low-rDS(ON) MOSFETs (60 mΩ HS / 43 mΩ LS) to sustain this current with up to 90% efficiency.
Does the ZL2102ALAFTK require external compensation components?
No, the ZL2102ALAFTK does not require external compensation components. It features auto compensation implemented via an internal digitally adjustable filter that adapts to load, input voltage, and output voltage conditions in real time. This capability is enabled by its mixed-signal architecture and is factory calibrated - eliminating the need for external RC networks or manual loop tuning during design.
Can the ZL2102ALAFTK operate without SMBus communication?
Yes, the ZL2102ALAFTK can operate fully autonomously without SMBus communication. All critical functions - including output voltage, switching frequency, soft-start, UVLO, and sequencing - are configurable via hardware pin straps (e.g., VSET, SYNC, SS). SMBus is optional for advanced features like real-time telemetry, margining, Snapshot™ capture, and dynamic reconfiguration.
What thermal management provisions are built into the ZL2102ALAFTK?
The ZL2102ALAFTK includes thermal overload protection with hysteresis (15°C), internal die temperature sensing (±5°C accuracy), and a dedicated exposed thermal pad (ePad) connected to SGND. Its θJA is 28°C/W on a standard multilayer board. To maintain TJ ≤ 125°C at 6 A, the ePad must be soldered to a low-impedance ground plane using ≥6 thermal vias - as specified in TB389 and AN2010.
Is the ZL2102ALAFTK pin-compatible with other devices in the ZL210x family?
The ZL2102ALAFTK shares the same 36-pin 6×6 mm QFN package and pinout with ZL2101 and ZL2103 variants, but functional differences exist - including output current rating, supported PMBus commands, and internal LDO configurations. While mechanical mounting is identical, electrical compatibility requires verification of VOUT range, sequencing behavior, and register map alignment before substitution.
ZL2102ALAFTK 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)
ZL2102ALAFTK FAQ
1.How can I place an order for ZL2102ALAFTK through Aetrix?
Please submit a Request for Quotation (RFQ) for ZL2102ALAFTK 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 ZL2102ALAFTK reliable?
The price and inventory of ZL2102ALAFTK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZL2102ALAFTK is usually 5 days.
3.What payment methods are accepted for ZL2102ALAFTK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZL2102ALAFTK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZL2102ALAFTK?
ZL2102ALAFTK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZL2102ALAFTK 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 ZL2102ALAFTK?
For technical support, including ZL2102ALAFTK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZL2102ALAFTK requirements.
6.How does Aetrix verify that ZL2102ALAFTK is sourced from the original manufacturer or authorized distributors?
All ZL2102ALAFTK 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 ZL2102ALAFTK meets industry standards.
7.What is the process for return or replacement of ZL2102ALAFTK?
All ZL2102ALAFTK units undergo pre-shipment inspection (PSI). If there is an issue with ZL2102ALAFTK, 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 ZL2102ALAFTK part is unused and in its original packaging.
Return procedure for ZL2102ALAFTK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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