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Renesas HIP6521CBZA
- Part No.:
- HIP6521CBZA
- Manufacturer:
- Renesas
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
HIP6521CBZA.pdf
- Description:
- IC REG QUAD BUCK/LNR SYNC 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:228
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Product details
Overview
HIP6521CBZA from Intersil is a PWM and triple linear power controller IC designed for motherboard-level regulation of four independent voltages in high-performance microprocessor systems. It integrates one voltage-mode synchronous buck PWM controller (for 2.5V memory core) and three bipolar NPN-based linear controllers (for 1.5V AGP, 2.5V clock, and 1.8V North/South Bridge), all with ±2% static regulation over line/load/temperature, 300kHz fixed-frequency operation, and MOSFET rDS(ON)-based overcurrent sensing.
For engineers reviewing the HIP6521CBZA datasheet, HIP6521CBZA pinout, HIP6521CBZA application, or HIP6521CBZA equivalent, key selection considerations include its 16-lead SOIC (Pb-free) package, four-output sequencing capability, ACPI-compliant linear regulator shutdown via FB pin pull-up, and compatibility with external bipolar pass transistors - critical for legacy PC power delivery designs requiring precise multi-rail control without digital interface overhead.
Technical Context
The HIP6521CBZA implements a single-loop voltage-mode PWM control architecture with a 300kHz oscillator, high-bandwidth error amplifier (15MHz GBWP, 6V/µs slew rate), and full 0–100% duty cycle range. Its overcurrent protection uses an internal 40µA current source at OCSET to sense voltage drop across the upper MOSFET's rDS(ON), eliminating need for external sense resistors.
All three linear regulators employ dedicated drive pins (DRIVE2/3/4) and feedback inputs (FB2/3/4) referenced to a common 0.8V internal reference, enabling independent undervoltage monitoring and soft-start re-initiation. Power-on reset (POR) monitors VCC (4.25–4.5V rising threshold) and OCSET (1.25V shutdown threshold) for system-level fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply Voltage | +5V ±10% - powers internal logic, gate drivers, and base current for external bipolar pass transistors |
| PWM Oscillator Frequency | 300kHz (275–325kHz range) - enables compact magnetics and predictable EMI profile |
| Reference Voltage | 0.800V - common precision reference for all four regulated outputs |
| Output Regulation Accuracy | ±2% over line, load, and temperature - ensures stable rail margins for CPU/memory subsystems |
| OCSET Current Source | 40µA (34–46µA) - sets overcurrent trip point using external resistor and MOSFET rDS(ON) |
| Linear Drive Current | 120mA max per DRIVE pin - sufficient to saturate external NPN pass transistors under worst-case VBE and β |
| Soft-Start Interval | 6.83ms typical - limits inrush current during system power-up |
Pinout & Package
Package: 16-lead SOIC (Pb-free), RoHS compliant, M16.15 footprint, θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DRIVE2 (Pin 1) | Linear Regulator 2 Base Driver | Supplies base current to external NPN transistor regulating 2.5V clock rail |
| FB2 (Pin 2) | Linear Regulator 2 Feedback Input | Monitors 2.5V output via resistor divider; triggers UV shutdown if <70% of 0.8V |
| FB (Pin 3) | PWM Controller Feedback Input | Inverting input of PWM error amplifier; regulates 2.5V memory core voltage |
| COMP (Pin 4) | PWM Error Amplifier Output | Compensation node for voltage-mode loop stability; connects to RC network on FB |
| GND (Pin 5) | Signal Ground Reference | Common return for all analog and logic circuitry; separate from PGND |
| PHASE (Pin 6) | PWM Switch Node Sense | Connects to source of upper MOSFET; used for rDS(ON) overcurrent detection |
| BOOT (Pin 7) | High-Side Gate Driver Bootstrap | Charges bootstrap capacitor (0.47µF) to enable UGATE drive above PHASE voltage |
| UGATE (Pin 8) | Upper MOSFET Gate Driver | Provides ±1A peak drive for synchronous buck high-side switch |
| PGND (Pin 9) | Power Ground Return | Low-impedance return path for PWM switching current; must be tied to lower MOSFET source |
| LGATE (Pin 10) | Lower MOSFET Gate Driver | Provides ±2A sink/source for synchronous buck low-side switch |
| VCC (Pin 11) | Bias Supply Input | +5V input powering IC core, gate drivers, and linear regulator base drive |
| OCSET (Pin 12) | Overcurrent Set Input | Internal 40µA current source develops VSET across ROCSET; trip occurs when VDS(ON) > VSET |
| DRIVE4 (Pin 13) | Linear Regulator 4 Base Driver | Drives NPN pass transistor for 1.5V AGP bus regulation |
| FB4 (Pin 14) | Linear Regulator 4 Feedback Input | Regulates 1.5V AGP rail; UV shutdown triggered if feedback drops below 0.56V |
| DRIVE3 (Pin 15) | Linear Regulator 3 Base Driver | Drives NPN pass transistor for 1.8V North/South Bridge core voltage |
| FB3 (Pin 16) | Linear Regulator 3 Feedback Input | Regulates 1.8V ICH/MCH rail; enables independent ACPI shutdown via 1.25V pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Four-output integrated power control | Single-chip solution for memory core (PWM), AGP (linear), clock (linear), and chipset core (linear) rails - reduces BOM count and layout complexity |
| ACPI-compliant linear regulator shutdown | Individual FB pin pull-up (>1.25V) disables each linear regulator independently, supporting OS-directed power states without hardware modification |
| rDS(ON)-based overcurrent protection | Eliminates external current-sense resistor in PWM stage, reducing cost, board space, and power loss while maintaining accurate cycle-by-cycle fault detection |
| Externally resistor-adjustable outputs | All four regulated voltages set via standard resistor dividers (e.g., 1.8V = 0.8V × (1 + RS/RP)), enabling field tuning without component replacement |
| Integrated soft-start with POR | Automatic 6.83ms ramp-up sequence triggered by VCC crossing 4.25V, preventing inrush damage and ensuring controlled power sequencing across all rails |
Applications
| Desktop Motherboard Power | Legacy Server Board Regulation |
|---|---|
Use Scenario: Regulating 2.5V memory core, 1.5V AGP, 2.5V clock, and 1.8V chipset voltage on ATX-compliant desktop motherboards with Intel Pentium 4 or AMD Athlon XP processors. IC Role / Device Role / Timing Role: Primary multi-rail power controller managing all non-CPU VRM rails; provides synchronous PWM for memory and bipolar linear regulation for auxiliary supplies. Use Value: Enables single-chip compliance with ACPI S0–S5 state transitions while maintaining ±2% regulation across temperature - critical for BIOS stability and memory integrity. | Use Scenario: Powering legacy dual-processor server boards where discrete linear regulators are preferred over switching solutions for noise-sensitive clock and chipset rails. IC Role / Device Role / Timing Role: Centralized linear regulator driver coordinating startup timing and fault response across multiple voltage domains using shared soft-start and POR logic. Use Value: Reduces component count by replacing three separate linear controller ICs and simplifies thermal design via integrated thermal shutdown coordination. |
| Embedded Industrial PC | Test Equipment Power Subsystem |
Use Scenario: Providing stable, sequenced 1.8V, 2.5V, and 1.5V rails for industrial embedded PCs operating in extended temperature environments (0°C to 70°C). IC Role / Device Role / Timing Role: Multi-output analog power manager delivering tightly regulated voltages with built-in overcurrent and undervoltage protection for mission-critical control logic. Use Value: Ensures reliable boot and runtime operation under variable load conditions due to ±2% regulation and independent rail fault isolation - minimizing unexpected resets. | Use Scenario: Generating calibrated low-noise bias voltages for analog front-ends in automated test equipment requiring simultaneous 2.5V clock and 1.8V logic supply. IC Role / Device Role / Timing Role: Precision voltage reference distributor with independent linear regulators optimized for low ripple and fast transient recovery on sensitive measurement circuits. Use Value: Delivers 2.5V clock rail with <1% ripple (via bipolar pass transistor filtering) and supports rapid power cycling between test modes using FB pin control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| HIP6521CB | Same die, Pb-containing SOIC package (non-RoHS) | Identical electrical performance and pinout; differs only in termination finish and MSL rating | Select HIP6521CBZA for RoHS-compliant production; HIP6521CB only for legacy repair or non-RoHS environments |
| ISL6521CRZ | Same functional block diagram and pinout; Renesas (ex-Intersil) second-source part with identical specs and Pb-free M16.15 package | Drop-in replacement with same thermal and electrical behavior; qualified for same industrial temperature range | ISL6521CRZ offers dual-sourcing assurance and identical lifecycle support - ideal for long-term industrial programs |
Compared with HIP6521CBZA, HIP6521CB lacks RoHS compliance but matches all electrical parameters, while ISL6521CRZ provides identical Pb-free performance with Renesas' extended product longevity commitment - making it the preferred alternative for new designs requiring supply chain resilience.
Availability
HIP6521CBZA is available at Aetrix Electronics and suitable for desktop motherboard design, legacy server board refurbishment, and industrial embedded PC power subsystems requiring stable component supply and long-lifecycle support.
Supply support for HIP6521CBZA 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 U.S.-based semiconductor company specializing in high-performance analog and power management ICs for computing, industrial, and communications markets.
The HIP6521CBZA belongs to Intersil's legacy motherboard power controller family, engineered specifically for ATX-compliant PC platforms requiring integrated PWM + linear regulation of memory, AGP, clock, and chipset rails without digital interface complexity.
FAQ
What is the operating temperature range for the HIP6521CBZA?
The HIP6521CBZA is specified for an ambient temperature range of 0°C to 70°C, with a maximum junction temperature of 125°C and absolute maximum storage temperature of –65°C to +150°C. Its thermal resistance θJA is 110°C/W in the SOIC package, requiring adequate PCB copper area and airflow for sustained operation near upper limits. The device includes internal thermal protection that initiates shutdown if junction temperature exceeds safe thresholds.
How does the HIP6521CBZA implement overcurrent protection on the PWM output?
The HIP6521CBZA uses MOSFET rDS(ON)-based sensing: an internal 40µA current source at OCSET develops a voltage (VSET) across an external resistor (ROCSET). When the voltage drop across the upper MOSFET's rDS(ON) exceeds VSET, the overcurrent comparator trips, initiating soft-start restart. This method eliminates external sense resistors, reducing cost and power loss while maintaining cycle-by-cycle fault detection accuracy in the HIP6521CBZA.
Can the HIP6521CBZA regulate voltages other than the standard 2.5V, 1.5V, and 1.8V rails?
Yes - all four outputs of the HIP6521CBZA are externally resistor-adjustable. The PWM output (VOUT1) can be set between VIN and 0.8V using a feedback divider on FB; linear outputs (VOUT2–VOUT4) use standard resistor networks referenced to the 0.8V internal reference. For example, a 3.3V linear rail requires RS/RP = 3.125, provided parallel resistance stays below 5kΩ. The HIP6521CBZA's architecture supports custom voltage configurations within its drive and regulation limits.
What is the purpose of the BOOT and PHASE pins on the HIP6521CBZA?
The BOOT pin connects to a bootstrap capacitor (0.47µF recommended) between BOOT and PHASE, supplying charge to drive the UGATE pin above the PHASE node voltage - essential for turning on the high-side N-channel MOSFET in the synchronous buck converter. The PHASE pin connects directly to the source of that upper MOSFET and serves dual roles: providing the switching node reference for the bootstrap circuit and enabling rDS(ON)-based overcurrent sensing in the HIP6521CBZA.
Does the HIP6521CBZA support ACPI power management features?
Yes - the HIP6521CBZA supports ACPI-compliant power state transitions via individual FB pin control. Pulling any FB2, FB3, or FB4 pin above 1.25V (e.g., with a logic-gate-coupled diode) shuts down its corresponding linear regulator; releasing the pin initiates a soft-start sequence. This enables OS-directed S3/S4 state entry/exit without modifying hardware. The HIP6521CBZA's design explicitly targets ACPI 2.0+ implementations in desktop and server platforms.
HIP6521CBZA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (3)
- Number of Outputs:
- 4
- Frequency - Switching:
- 300kHz
- Voltage/Current - Output 1:
- Controller
- Voltage/Current - Output 2:
- Controller
- Voltage/Current - Output 3:
- Controller
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
HIP6521CBZA FAQ
1.How can I place an order for HIP6521CBZA through Aetrix?
Please submit a Request for Quotation (RFQ) for HIP6521CBZA 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 HIP6521CBZA reliable?
The price and inventory of HIP6521CBZA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for HIP6521CBZA is usually 5 days.
3.What payment methods are accepted for HIP6521CBZA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for HIP6521CBZA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for HIP6521CBZA?
HIP6521CBZA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your HIP6521CBZA 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 HIP6521CBZA?
For technical support, including HIP6521CBZA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your HIP6521CBZA requirements.
6.How does Aetrix verify that HIP6521CBZA is sourced from the original manufacturer or authorized distributors?
All HIP6521CBZA 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 HIP6521CBZA meets industry standards.
7.What is the process for return or replacement of HIP6521CBZA?
All HIP6521CBZA units undergo pre-shipment inspection (PSI). If there is an issue with HIP6521CBZA, 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 HIP6521CBZA part is unused and in its original packaging.
Return procedure for HIP6521CBZA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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