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Renesas ISL6536IBZ
- Part No.:
- ISL6536IBZ
- Manufacturer:
- Renesas
- Category:
- Supervisors
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ISL6536IBZ.pdf
- Description:
- IC SUPERVISOR 4 CHANNEL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,330
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Product details
Overview
ISL6536IBZ from Intersil is a four-channel supervisory IC that monitors up to four positive supply rails >0.7V using external resistor dividers and an internal 0.63V reference. It features open-drain PGOOD output with guaranteed validity down to VDD <1V, 30µs glitch immunity on VMON inputs, and ENABLE-controlled reset. It is used in graphics cards and multi-rail DSP/processor power systems.
For engineers reviewing the ISL6536IBZ datasheet, ISL6536IBZ pinout, ISL6536IBZ application, or ISL6536IBZ equivalent, key selection criteria include adjustable undervoltage lockout per rail, PGOOD delay timing (≤2µs), EN threshold hysteresis (65mV), VDD operating range (2.7V–4V), and SOIC-8 thermal performance (θJA = 108°C/W).
Technical Context
The ISL6536IBZ implements a Boolean AND logic function across four independently adjustable VMON inputs, each compared to a stable 0.63V internal reference with ±10mV hysteresis and 100µV/°C temperature coefficient. Its PGOOD output releases within 0.05µs of ENABLE rising and responds to VMON faults within 2µs after the last valid input falls below threshold.
VDD bias powers the IC over 2.7V–4V and enables operation only when ≥2.6V; PGOOD remains asserted until any VMON drops below its programmed threshold or ENABLE falls below 0.4×VDD. The 30µs glitch filter rejects transients on all VMON pins, and the internal 20kΩ pull-up to VDD eliminates need for external PGOOD pull-up resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 2.7V to 4V - defines minimum system bias voltage required for reliable supervision and PGOOD assertion. |
| VMON Threshold | 0.633V (typ) ±10mV hysteresis - sets precise undervoltage detection point referenced to internal bandgap. |
| PGOOD Delay | ≤2µs from last VMON rise - ensures rapid power-good signaling after all rails stabilize. |
| Glitch Immunity | 30µs on all VMON inputs - prevents false PGOOD deassertion due to short-duration supply noise. |
| ENABLE Threshold | 0.4VDD to 0.6VDD with 65mV hysteresis - provides noise-resistant enable/disable control with defined switching window. |
| PGOOD Output Type | Open-drain with internal 20kΩ pull-up to VDD - allows wired-OR configuration and interface to multiple logic families without external components. |
| Operating Temp | −40°C to +85°C - supports industrial and embedded applications including graphics cards and telecom systems. |
Pinout & Package
ISL6536IBZ is housed in an 8-lead narrow-body SOIC package (JEDEC MS-012-AA, pkg drawing M8.15), with 1.27mm lead pitch, 4.00mm body width, and 6.20mm body length. Thermal resistance θJA is 108°C/W in free air on high-conductivity test board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Bias supply input | Provides operating power (2.7V–4V); PGOOD remains valid down to VDD <1V during brownout. |
| 2 PGOOD | Power-good status output | Open-drain output asserting high only when all four VMON inputs exceed thresholds; internally pulled up to VDD via 20kΩ. |
| 3 ENABLE | Supervision enable control | Active-high input with 10µA internal pull-up to VDD; falling below 0.4VDD forces PGOOD low. |
| 4 GND | Ground reference | Common return path for VDD, VMON inputs, and PGOOD sink current. |
| 5–8 VMON1–VMON4 | Adjustable voltage monitor inputs | Each compares divided rail voltage to 0.63V reference; 30µs glitch filter prevents transient-induced false trips. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent VMON inputs | Enables simultaneous monitoring of multiple processor/core/DSP supply rails (e.g., VDDIO, VDDA, VDDCORE, VDDPLL) with individual resistor-divider programming. |
| Guaranteed PGOOD validity to VDD <1V | Ensures reliable power-fail detection during brownout conditions without requiring auxiliary bias sources. |
| 30µs VMON glitch immunity | Rejects common-mode noise and short-duration supply disturbances typical in high-speed digital systems. |
| Internal 20kΩ PGOOD pull-up | Eliminates need for external pull-up resistor, reducing BOM count and PCB footprint in space-constrained designs. |
| ENABLE with hysteresis | 65mV threshold hysteresis prevents chatter during slow-rising enable signals and improves noise margin in noisy environments. |
Applications
| Graphics Cards | Multi-Voltage DSPs |
|---|---|
|
Use Scenario: Monitoring GPU core, memory, I/O, and auxiliary rails in discrete graphics cards under dynamic load transitions. IC Role / Device Role / Timing Role: Four-channel voltage supervisor asserting PGOOD only when all critical rails meet specification before GPU initialization. Use Value: Prevents GPU boot failure by ensuring stable power sequencing; 2µs PGOOD delay enables fast post-power-up validation. |
Use Scenario: Coordinating power-up of multiple voltage domains (e.g., analog, digital, I/O, PLL) in high-performance DSPs used in baseband processing. IC Role / Device Role / Timing Role: Centralized supervision unit verifying rail readiness prior to DSP clock enable and firmware execution. Use Value: Eliminates need for discrete comparators per rail; 30µs glitch immunity avoids false resets during transient coupling between adjacent domains. |
| Embedded Control Systems | Medical Equipment |
|
Use Scenario: Ensuring clean startup of microcontroller, sensor interface, communication, and actuator supply rails in industrial PLCs and motor controllers. IC Role / Device Role / Timing Role: Supervisory gatekeeper enabling system reset release only after full rail stabilization across heterogeneous subsystems. Use Value: Internal ENABLE pin allows manual reset via push-button; guaranteed PGOOD validity to VDD <1V supports safe shutdown detection. |
Use Scenario: Validating isolated power supplies for patient-monitoring front-end analog circuits, digital processors, display, and wireless comms modules. IC Role / Device Role / Timing Role: Safety-critical power integrity monitor confirming all regulated outputs meet medical-grade stability requirements before device activation. Use Value: RoHS-compliant Pb-free SOIC-8 package meets medical regulatory requirements; −40°C to +85°C rating supports wide ambient operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar four-channel voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3307-33D | Fixed 3.3V VDD bias; three VMON channels; no internal PGOOD pull-up; requires external resistor. | Limited to 3 monitored rails; lacks fourth VMON input and integrated 20kΩ pull-up, increasing component count. | Choose if only three rails require supervision and design already includes external PGOOD pull-up. |
| MAX6816ESE+ | Single-channel with programmable delay; no multi-rail AND logic; different fault response (latched vs. real-time). | Not functionally equivalent-designed for single-rail reset generation, not coordinated multi-supply validation. | Use only for simple single-rail reset needs; not suitable as drop-in replacement for ISL6536IBZ's four-rail AND supervision. |
Compared with TPS3307-33D and MAX6816ESE+, the ISL6536IBZ uniquely delivers four independently adjustable VMON inputs with integrated PGOOD pull-up and sub-2µs response, making it optimal for complex multi-rail systems where compactness, speed, and rail coordination are critical.
Availability
ISL6536IBZ is available at Aetrix Electronics and suitable for graphics cards, embedded control systems, and medical equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL6536IBZ 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 Corporation (now part of Renesas Electronics) is a U.S.-based semiconductor company specializing in precision analog, power management, and interface ICs for industrial, computing, and communications markets.
The ISL6536IBZ belongs to Intersil's supervisory IC product line, engineered specifically for high-reliability multi-rail power monitoring in graphics, DSP, and embedded systems where accurate, fast, and glitch-immune voltage validation is essential.
FAQ
What is the minimum VDD voltage required for ISL6536IBZ to assert PGOOD?
The ISL6536IBZ asserts PGOOD only after VDD reaches ≥2.6V (VDD_L2H threshold). However, once asserted, PGOOD remains valid even if VDD falls as low as 1V-ensuring reliable brownout detection. This behavior is confirmed in the Absolute Maximum Ratings and Electrical Specifications sections of the FN9114 datasheet, where PGOOD output low voltage is specified at VDD = 1V.
Can ISL6536IBZ monitor voltages above 4V?
Yes-the ISL6536IBZ can supervise any positive voltage >0.7V using external resistor dividers to scale the input down to ≤0.63V for comparison against its internal reference. The VMON pins tolerate up to VDD+0.3V, and the IC's bias supply (VDD) operates independently at 2.7V–4V, decoupling monitored rail voltage from bias constraints.
Does ISL6536IBZ require an external pull-up resistor on the PGOOD pin?
No-ISL6536IBZ includes an internal 20kΩ pull-up resistor to VDD on the PGOOD pin, eliminating the need for external components. This is explicitly stated in the Pin Descriptions and Description and Operation sections of the FN9114 datasheet and verified in the Electrical Specifications table under "Pull-Up Resistance (PGpu)".
How does the 30µs glitch filter on ISL6536IBZ VMON inputs improve system reliability?
The 30µs glitch filter prevents transient supply noise-such as switching regulator ripple or coupling spikes-from falsely triggering PGOOD deassertion. This ensures the ISL6536IBZ only responds to sustained undervoltage conditions, not momentary dips, thereby avoiding spurious system resets in electrically noisy environments like graphics cards or motor drives.
What is the temperature coefficient of the ISL6536IBZ internal voltage reference?
The ISL6536IBZ internal 0.63V reference has a temperature coefficient of 100µV/°C (3.3VMON_TC), meaning its threshold drifts by ±100µV per degree Celsius change in junction temperature. This value is measured and specified across −40°C to +85°C and directly impacts the accuracy of undervoltage detection in thermally varying applications.
ISL6536IBZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Multi-Voltage Supervisor
- Number of Voltages Monitored:
- 4
- Voltage - Threshold:
- Adjustable/Selectable
- Output:
- Open Drain or Open Collector
- Reset:
- Active Low
- Reset Timeout:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ISL6536IBZ FAQ
1.How can I place an order for ISL6536IBZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL6536IBZ 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 ISL6536IBZ reliable?
The price and inventory of ISL6536IBZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL6536IBZ is usually 5 days.
3.What payment methods are accepted for ISL6536IBZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL6536IBZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL6536IBZ?
ISL6536IBZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL6536IBZ 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 ISL6536IBZ?
For technical support, including ISL6536IBZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL6536IBZ requirements.
6.How does Aetrix verify that ISL6536IBZ is sourced from the original manufacturer or authorized distributors?
All ISL6536IBZ 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 ISL6536IBZ meets industry standards.
7.What is the process for return or replacement of ISL6536IBZ?
All ISL6536IBZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL6536IBZ, 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 ISL6536IBZ part is unused and in its original packaging.
Return procedure for ISL6536IBZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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