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Renesas ISL97536IUZ-TS2700
- Part No.:
- ISL97536IUZ-TS2700
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- Renesas
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Product details
Overview
ISL97536IUZ-TS2700 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 features 500µA quiescent current and <1µA shutdown current. Used in portable Li-ion-powered devices requiring compact, high-efficiency power conversion.
For engineers reviewing the ISL97536IUZ-TS2700 datasheet, ISL97536IUZ-TS2700 pinout, ISL97536IUZ-TS2700 application, or ISL97536IUZ-TS2700 equivalent, key selection criteria include its 10-lead MSOP package footprint (<0.15in²), hiccup-mode overcurrent/over-temperature protection, 100ms POR output, and fixed internal compensation enabling minimal external components (two 10µF ceramic caps + one 1.8µH inductor).
Technical Context
The ISL97536IUZ-TS2700 implements a voltage-mode PWM controller with fixed internal compensation optimized for 1.5µH–2.2µH inductors and 10µF–40µF X5R/X7R ceramic capacitors. Its synchronous rectification uses complementary PMOS (70mΩ) and NMOS (45mΩ) switches driven at 1.4MHz nominal frequency, enabling up to 95% efficiency across 0–1A load range.
It integrates dedicated thermal shutdown (145°C trip, 130°C hysteresis), current-limit protection (1.5A), and a 100ms open-drain POR output triggered by FB voltage crossing 95% of target. The RSI pin provides asynchronous reset injection into the POR timer without affecting VO regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 6V - supports single-cell Li-ion, 3.3V, and 5V system rails without external LDO pre-regulation. |
| Output Current | 1A continuous - sufficient for core logic, RF transceivers, or sensor subsystems in portable electronics. |
| Switching Frequency | 1.25–1.6MHz (typ 1.4MHz) - enables use of small 1.5–2.2µH inductors and reduces output ripple without EMI filter complexity. |
| Quiescent Current | 500µA typ - minimizes battery drain during light-load operation in always-on subsystems. |
| Shutdown Current | <1µA - ensures near-zero standby power when disabled via EN pin. |
| Feedback Voltage | 790–810mV - precise reference enables accurate output setting (e.g., 1.8V ±1%) using standard 1% resistors. |
| Thermal Shutdown | 145°C trip / 130°C hysteresis - protects against sustained overload or poor PCB thermal design while allowing safe restart. |
Pinout & Package
The ISL97536IUZ-TS2700 is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (MDP0043), measuring 3.0mm × 4.9mm × 1.1mm max height, rated for -40°C to +85°C ambient operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SGND | Signal ground reference | Return path for control circuitry; must be isolated from PGND and joined at single point near IC to avoid noise coupling. |
| 2 PGND | Power ground return | 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; trace must be short and wide to minimize EMI and voltage spikes. |
| 4 VIN | Main power input | Supplies power stage (PMOS/NMOS); requires low-ESR 10µF ceramic cap placed adjacent to pin. |
| 5 VDD | Controller supply | Provides bias to internal logic and reference; decoupled separately from VIN to reduce noise sensitivity. |
| 6 RSI | Reset signal input | Asynchronous active-HI trigger that forces POR low immediately and restarts 100ms timer; pulled low when unused. |
| 7 EN | Enable control | Active-HI logic input; rising threshold 2.4V, falling threshold 0.8V; controls soft-start and full shutdown (<1µA IQ). |
| 8 POR | Open-drain reset output | 100ms delayed Power-On-Reset or Power-Good signal; requires external pull-up (R4) for active-HI assertion. |
| 9 VO | Output voltage sense | Direct connection to regulated output; used for remote sensing if feedback path routing demands low-impedance tie. |
| 10 FB | Voltage feedback input | Monitors divided output voltage; sets regulation point via R1/R2 divider; high-impedance (250nA bias) for minimal divider current. |
Key Features
| Feature | Design Value |
|---|---|
| Internally-compensated controller | Eliminates need for external compensation network - only two 10µF ceramic caps and one 1.8µH inductor required for stable 1A operation. |
| Hiccup-mode overcurrent protection | Shuts down for ~700µs after current limit (1.5A) is exceeded, then retries - limits average power dissipation during sustained short-circuit events. |
| 100ms Power-On-Reset (POR) | Guaranteed 80–120ms delay before POR goes high after VO reaches regulation - synchronizes downstream logic reset timing. |
| Separate SGND and PGND pins | Enables clean separation of analog control ground and noisy power ground - critical for stability and low-noise regulation in mixed-signal systems. |
| Low-profile MSOP10 package | 1.1mm max height and 0.15in² total footprint - fits space-constrained SFP modules, barcode scanners, and handheld medical devices. |
Applications
| Portable Barcode Scanners | Li-ion–Powered Handheld Test Equipment |
|---|---|
Use Scenario: Compact, battery-operated scanner requiring stable 1.8V rail for CMOS image sensor and microcontroller under variable load. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1A at 1.8V from single-cell Li-ion (2.8–4.2V), with POR synchronized to sensor initialization sequence. Use Value: 500µA quiescent current extends battery life between scans; hiccup-mode protection prevents thermal runaway during motor-driven scan actuation. | Use Scenario: Portable oscilloscope or multimeter needing precise 3.3V and 1.2V rails from 3.7V Li-ion battery, with fast transient response to measurement bursts. IC Role / Device Role / Timing Role: Adjustable-output buck converter generating 3.3V for MCU and analog front-end, leveraging FB/VO pins for accurate remote sensing. Use Value: 1.4MHz switching allows small 1.8µH inductor and tight layout; separate SGND/PGND pins maintain ADC reference integrity during high-current display updates. |
| SFP Transceiver Modules | PDA and Pocket PC Systems |
Use Scenario: Small-form-factor pluggable optical module requiring ultra-compact 3.3V supply with strict EMI limits and thermal headroom in dense chassis. IC Role / Device Role / Timing Role: Space-optimized 1A buck regulator occupying <0.15in² on one side of PCB, with POR signaling link-ready status to host controller. Use Value: MSOP10 package height (1.1mm) meets SFP MSA mechanical envelope; fixed compensation avoids layout-sensitive tuning during high-volume assembly. | Use Scenario: Legacy PDA with ARM processor, touchscreen controller, and backlight driver sharing a single Li-ion cell. IC Role / Device Role / Timing Role: Main system regulator providing 1.2V core voltage and 2.5V I/O rail via dual-output configuration (using two ISL97536IUZ-TS2700 units). Use Value: <1µA shutdown current preserves battery charge during suspend mode; RSI pin enables coordinated reset across multiple rails during wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 3MHz switching frequency, 0.65V feedback voltage, 2.05V–6.5V input range, 0.8A max output. | Limited to 0.8A output and higher minimum input voltage - unsuitable for 1A loads or sub-2.5V start-up from deeply discharged Li-ion. | Select when higher switching frequency and smaller inductors are prioritized over output current and low-VIN capability. |
| MP2101DQ-LF-Z | 1.5MHz switching, 0.8V feedback, 2.5V–5.5V input, 1A output, but no integrated POR or RSI functionality. | Lacks dedicated reset timing and asynchronous reset injection - requires external POR IC or GPIO-based sequencing for reliable system boot. | Select when board area allows discrete reset generation and thermal/overcurrent protection is handled externally. |
Compared with TPS62231DRVR and MP2101DQ-LF-Z, the ISL97536IUZ-TS2700 uniquely combines 1A capability, 2.5V minimum input, integrated 100ms POR with RSI control, and hiccup-mode protection in a single 10-pin MSOP - making it optimal for space-constrained, battery-powered systems requiring autonomous power sequencing and robust fault handling.
Availability
ISL97536IUZ-TS2700 is available at Aetrix Electronics and suitable for portable barcode readers, Li-ion–powered test equipment, SFP modules, PDAs, and handheld medical devices requiring stable component supply with consistent parametric performance and long-term lifecycle support.
Supply support for ISL97536IUZ-TS2700 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 analog and power management IC designer known for high-performance DC/DC regulators, precision amplifiers, and interface solutions.
The ISL97536IUZ-TS2700 belongs to Intersil's monolithic synchronous buck regulator product line, engineered specifically for ultra-compact, high-efficiency power conversion in battery-powered portable electronics where PCB area, thermal profile, and autonomous fault recovery are critical.
FAQ
What is the minimum input voltage required for the ISL97536IUZ-TS2700 to start switching?
The ISL97536IUZ-TS2700 begins switching when VIN rises above 2.2V (typical turn-on threshold). This 2.2V minimum start-up voltage enables reliable operation from partially discharged single-cell Li-ion batteries down to ~2.8V under load, supporting extended runtime in portable applications without requiring pre-bias or auxiliary start-up circuitry. The ISL97536IUZ-TS2700 maintains regulation until VIN falls below 2.0V (typical shutdown threshold), ensuring graceful brown-out behavior.
Does the ISL97536IUZ-TS2700 require external compensation components?
No, the ISL97536IUZ-TS2700 features an internally compensated voltage-mode PWM controller optimized for 1.5µH–2.2µH inductors and 10µF–40µF ceramic capacitors. This eliminates all external compensation networks - only two decoupling capacitors and one inductor are needed for stable 1A operation. The ISL97536IUZ-TS2700's fixed compensation simplifies layout, reduces BOM count, and ensures consistent loop stability across temperature and process variations without tuning.
How does the RSI pin function in the ISL97536IUZ-TS2700?
The RSI pin on the ISL97536IUZ-TS2700 is an active-HI asynchronous reset input that forces the POR output low immediately upon assertion and restarts the 100ms POR timer once RSI returns low. This allows external controllers to inject system-wide resets without disrupting the regulated output voltage VO. When unused, RSI must be tied to ground; the ISL97536IUZ-TS2700 ignores floating or high-impedance states on this pin to prevent spurious resets.
What thermal performance can be expected from the ISL97536IUZ-TS2700 in a typical 2-layer PCB layout?
In a standard 2-layer PCB layout with moderate copper pour around PGND and no thermal vias, the ISL97536IUZ-TS2700 exhibits a junction-to-ambient thermal resistance (θJA) of approximately 125°C/W. At 1A output with 3.3V input and 1.8V output, power dissipation is ~150mW, resulting in ~19°C junction rise above ambient - well within the -40°C to +85°C operating range. Adding thermal vias under the PGND pad reduces θJA significantly, as confirmed in the datasheet's thermal performance section.
Can the ISL97536IUZ-TS2700 be used to generate multiple output voltages?
Yes, the ISL97536IUZ-TS2700 supports multiple output voltages through external resistor dividers on the FB pin - each configured independently per unit. For example, one ISL97536IUZ-TS2700 can deliver 1.2V (R1=124kΩ, R2=100kΩ) while another generates 3.3V (R1=412kΩ, R2=100kΩ), both from the same 5V input rail. The ISL97536IUZ-TS2700's 0.8V feedback reference and wide VIN range make it suitable for cascaded or parallel multi-rail architectures in PDAs and test equipment.
ISL97536IUZ-TS2700 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
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- Qualification:
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- Supplier Device Package:
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ISL97536IUZ-TS2700 FAQ
1.How can I place an order for ISL97536IUZ-TS2700 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97536IUZ-TS2700 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-TS2700 reliable?
The price and inventory of ISL97536IUZ-TS2700 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97536IUZ-TS2700 is usually 5 days.
3.What payment methods are accepted for ISL97536IUZ-TS2700?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97536IUZ-TS2700 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97536IUZ-TS2700?
ISL97536IUZ-TS2700 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97536IUZ-TS2700 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-TS2700?
For technical support, including ISL97536IUZ-TS2700 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97536IUZ-TS2700 requirements.
6.How does Aetrix verify that ISL97536IUZ-TS2700 is sourced from the original manufacturer or authorized distributors?
All ISL97536IUZ-TS2700 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-TS2700 meets industry standards.
7.What is the process for return or replacement of ISL97536IUZ-TS2700?
All ISL97536IUZ-TS2700 units undergo pre-shipment inspection (PSI). If there is an issue with ISL97536IUZ-TS2700, 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-TS2700 part is unused and in its original packaging.
Return procedure for ISL97536IUZ-TS2700:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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