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Renesas ISL97536IUZ-T
- Part No.:
- ISL97536IUZ-T
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL97536IUZ-T.pdf
- Description:
- IC REG BUCK ADJ 1A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,394
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Product details
Overview
ISL97536IUZ-T from Intersil is a synchronous monolithic 1A step-down DC/DC regulator with integrated PMOS/NMOS FETs, internal compensation, and 1.4MHz PWM switching. It operates from 2.5V–6V input (Li-ion, 3.3V, or 5V rails), delivers adjustable output from 0.8V to VIN via external resistor divider, and achieves up to 95% efficiency in portable power management applications.
For engineers reviewing the ISL97536IUZ-T datasheet, ISL97536IUZ-T pinout, ISL97536IUZ-T application, or ISL97536IUZ-T equivalent, key selection criteria include its 500µA no-load quiescent current, <1µA shutdown current, 100ms open-drain POR output, hiccup-mode overcurrent/over-temperature protection, and compact 10-lead MSOP package with ≤1.1mm height.
Technical Context
The ISL97536IUZ-T implements a voltage-mode PWM controller with fixed internal compensation, eliminating need for external loop components. Its synchronous rectification uses integrated 70mΩ PMOS and 45mΩ NMOS switches, enabling high efficiency across 0–1A load range while maintaining stability with 10–40µF ceramic input/output capacitors and 1.5–2.2µH inductors.
It features dual ground separation (SGND for control logic, PGND for power stage), dedicated RSI pin for asynchronous POR reset, and thermal shutdown at +145°C with +15°C hysteresis. The 100ms POR delay is triggered when VFB rises above 95% of target or upon RSI assertion, providing reliable system initialization timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion, 3.3V, and 5V supply rails without external LDO pre-regulation. |
| Output Current | 1A continuous - sufficient for core logic, RF modules, or display backlight drivers in space-constrained devices. |
| Switching Frequency | 1.25–1.6MHz typical - enables use of small 1.5–2.2µH inductors and reduces output ripple without audible noise. |
| Quiescent Current | 500µA typical at no load - extends battery life in always-on or low-duty-cycle portable systems. |
| Shutdown Current | <1µA - ensures near-zero drain during deep sleep or system off states. |
| Feedback Voltage | 790–810mV - precise reference enables accurate output regulation across temperature and line variations. |
| Thermal Shutdown | 145°C trip, 130°C recovery - protects against sustained overload or poor PCB thermal design without latch-up. |
Pinout & Package
ISL97536IUZ-T is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (MDP0043) with 0.5mm pitch, 3.0mm × 4.9mm footprint, and maximum height of 1.1mm - optimized for one-side assembly and minimal PCB area (<0.15in² total converter solution).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SGND | Signal Ground Reference | Return path for control circuitry; must be separated from PGND and joined at single point near IC to avoid noise coupling. |
| 2 PGND | Power Ground Reference | High-current return for LX switch node and output capacitor; requires large copper pour and multiple vias for thermal relief. |
| 3 LX | Switch Node Output | Drives external inductor; carries high di/dt; must be routed short and wide to minimize EMI and voltage spikes. |
| 4 VIN | Main Power Input | Supplies power stage (PMOS/NMOS); requires local 10–40µF ceramic decoupling placed adjacent to pin. |
| 5 VDD | Controller Supply | Powers internal logic and reference; derived from VIN but internally regulated; decoupled separately. |
| 6 RSI | Reset Input | Active-HI asynchronous trigger for immediate POR restart; pulled low when unused to enable POR function. |
| 7 EN | Enable Control | Logic-HI (>2.4V) enables regulation; logic-LO disables converter and reduces supply current to <1µA. |
| 8 POR | Open-Drain Power-On Reset | Asserts low for 80–120ms after VFB reaches target; serves as system reset or power-good signal with external pull-up. |
| 9 VO | Output Voltage Sense | Direct connection to regulated output; used with FB to close feedback loop; sensitive to trace impedance. |
| 10 FB | Voltage Feedback Input | Monitors resistive divider between VO and SGND; sets output per VOUT = 0.8V × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Internally-compensated controller | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while ensuring stability with standard 10–40µF ceramic caps. |
| Hiccup-mode overcurrent protection | Shuts down for ~700µs × VIN/3 after current limit (1.5A) is exceeded, then retries - limits average power dissipation during sustained short-circuit events. |
| Dual ground architecture (SGND/PGND) | Prevents switching noise from corrupting feedback and control signals - critical for achieving tight load/line regulation (<±0.7%) and low output ripple. |
| 100ms programmable POR output | Provides deterministic system reset timing independent of input ramp rate - simplifies sequencing in multi-rail designs without external timers. |
| Ultra-low shutdown current | <1µA draw in disable state - enables use in battery-backed systems where standby leakage directly impacts shelf life. |
Applications
| Bar Code Readers | Portable Test Equipment |
|---|---|
|
Use Scenario: Compact handheld scanners requiring stable 1.8V or 3.3V rail for CMOS image sensor and decode ASIC under intermittent Li-ion operation. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1A peak current with fast transient response to handle burst-mode imaging loads. Use Value: 500µA quiescent current extends battery runtime between scans; 100ms POR ensures clean MCU reset on power-up without external RC network. |
Use Scenario: Battery-powered multimeters and signal analyzers needing isolated, low-noise 2.5V reference and 3.3V digital supply from single 3.7V cell. IC Role / Device Role / Timing Role: Main DC/DC converter powering microcontroller, ADC, and display driver with tight load regulation (<±0.5%). Use Value: Internal compensation and fixed-frequency PWM simplify layout; hiccup-mode protection prevents damage during probe short-circuits. |
| Cellular Phones | SFP Modules |
|
Use Scenario: Powering baseband processor I/O or RF front-end bias rails in ultra-thin handsets where board space and thermal headroom are severely constrained. IC Role / Device Role / Timing Role: Secondary buck regulator generating 1.2V or 1.8V core voltage with minimal footprint and height (≤1.1mm). Use Value: MSOP10 package enables one-side assembly; 95% peak efficiency minimizes heat generation near sensitive RF sections. |
Use Scenario: Providing regulated 3.3V supply for SFP+ transceivers in compact optical networking equipment with strict thermal and EMI requirements. IC Role / Device Role / Timing Role: Point-of-load regulator converting 5V mid-rail to 3.3V with fast load-step response to support high-speed data bursts. Use Value: 1.4MHz switching frequency avoids interference with 10G Ethernet harmonics; POR output synchronizes transceiver initialization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 3MHz switching frequency, 0.65V feedback voltage, 2.05V–6.5V input range, 0.8µA shutdown current. | Higher frequency allows smaller inductors but increases switching losses at >500mA; lower VFB improves accuracy at low output voltages. | Preferred for designs prioritizing ultra-small magnetics and sub-1V outputs; less suitable for noise-sensitive analog sections due to higher fSW. |
| MAX17503GCU+ | 4.5V–60V input, 2A output, external compensation, adjustable soft-start, ±1.5% output accuracy. | Wider VIN range and higher current suit industrial inputs; external compensation adds flexibility but increases design complexity and BOM count. | Chosen when input exceeds 6V or 1A is insufficient; not drop-in due to different pinout, package (16-pin TQFN), and layout requirements. |
Compared with TPS62231DRYR and MAX17503GCU+, the ISL97536IUZ-T offers optimal balance of low quiescent current (500µA), integrated compensation, and compact MSOP10 footprint for 2.5–6V battery-powered systems - making it ideal where simplicity, size, and standby efficiency outweigh need for ultra-high fSW or wide-input capability.
Availability
ISL97536IUZ-T is available at Aetrix Electronics and suitable for bar code readers, portable test equipment, and cellular phone power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL97536IUZ-T 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 ISL97536IUZ-T belongs to Intersil's monolithic DC/DC regulator product line, designed specifically for space-constrained, battery-operated portable electronics requiring high efficiency, low quiescent current, and simplified layout.
FAQ
What is the recommended input capacitor value for ISL97536IUZ-T?
The ISL97536IUZ-T requires a 10µF to 40µF X5R or X7R multilayer ceramic capacitor placed as close as possible to the VIN and PGND pins. This value ensures adequate RMS current handling (≈0.5 × IO) and low impedance at 1.4MHz, minimizing input voltage ripple and preventing instability. Larger values within this range improve transient response but do not affect compensation.
Does ISL97536IUZ-T support adjustable output voltage, and how is it set?
Yes, ISL97536IUZ-T supports adjustable output voltage from 0.8V to VIN using an external resistor divider between VO and SGND connected to the FB pin. The output is calculated as VOUT = 0.8V × (1 + R1/R2), where R2 is typically 10kΩ–100kΩ. The feedback voltage is tightly regulated at 790–810mV across temperature and line conditions.
How does the POR function work on ISL97536IUZ-T, and can it be disabled?
The ISL97536IUZ-T provides a 100ms open-drain POR output that asserts low after VFB reaches ≥95% of target. It can be triggered asynchronously via the RSI pin. To disable POR, tie RSI to GND and leave POR unconnected - the output remains inactive. No external components are required unless using POR as a power-good signal, which needs a pull-up resistor.
What thermal performance can be expected from ISL97536IUZ-T in a typical 2-layer PCB layout?
In a standard 2-layer PCB, the ISL97536IUZ-T exhibits a junction-to-ambient thermal resistance (θJA) of approximately 125°C/W. With 1A load and 5V input, power dissipation is ~350mW; this results in ~44°C junction rise above ambient. Adding thermal vias under PGND and maximizing copper area reduces θJA significantly - verified layouts achieve <80°C/W on 4-layer boards.
Is ISL97536IUZ-T pin-compatible with other members of the ISL975xx family?
No, ISL97536IUZ-T is not pin-compatible with other ISL975xx variants such as ISL97534 or ISL97538. While sharing functional similarities, differences in pin assignment (e.g., absence of SYNC or MODE pins) and internal feature sets prevent direct substitution. Always verify pinout and electrical specifications against the specific device datasheet before replacement.
ISL97536IUZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 6V
- Current - Output:
- 1A
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
ISL97536IUZ-T FAQ
1.How can I place an order for ISL97536IUZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97536IUZ-T 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 ISL97536IUZ-T reliable?
The price and inventory of ISL97536IUZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97536IUZ-T is usually 5 days.
3.What payment methods are accepted for ISL97536IUZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97536IUZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97536IUZ-T?
ISL97536IUZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97536IUZ-T 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 ISL97536IUZ-T?
For technical support, including ISL97536IUZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97536IUZ-T requirements.
6.How does Aetrix verify that ISL97536IUZ-T is sourced from the original manufacturer or authorized distributors?
All ISL97536IUZ-T 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 ISL97536IUZ-T meets industry standards.
7.What is the process for return or replacement of ISL97536IUZ-T?
All ISL97536IUZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL97536IUZ-T, 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 ISL97536IUZ-T part is unused and in its original packaging.
Return procedure for ISL97536IUZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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