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Renesas ISL97536IUZ-TK
- Part No.:
- ISL97536IUZ-TK
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL97536IUZ-TK.pdf
- Description:
- IC REG BUCK ADJ 1A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,057
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Product details
Overview
ISL97536IUZ-TK from Intersil is a synchronous 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 - ideal for battery-powered portable electronics requiring compact, efficient power conversion.
For engineers reviewing the ISL97536IUZ-TK datasheet, ISL97536IUZ-TK pinout, ISL97536IUZ-TK application, or ISL97536IUZ-TK equivalent, key selection criteria include its 10-lead MSOP package footprint (<0.15in²), 100ms open-drain POR output, hiccup-mode overcurrent/over-temperature protection, and fixed internal compensation enabling minimal external component count (2×10µF ceramic caps + 1.8µH inductor).
Technical Context
The ISL97536IUZ-TK implements a voltage-mode PWM controller with fixed internal compensation, eliminating need for external loop compensation components. Its synchronous rectification uses integrated 70mΩ PMOS and 45mΩ NMOS switches, supporting up to 95% efficiency at 600mA load with 3.3V input and 1.8V output.
It integrates dedicated protection circuitry: thermal shutdown activates at +145°C (130°C hysteresis), current limit triggers at ~1.5A, and both initiate hiccup-mode recovery. The RSI pin enables manual reset of the 100ms POR signal without affecting regulation, while separate SGND and PGND pins enforce clean signal/power ground separation.
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 level-shifting. |
| Output Current | 1A continuous - sufficient for core logic, RF modules, or display drivers in portable devices. |
| Switching Frequency | 1.25–1.6MHz typical - enables use of small 1.5–2.2µH inductors and reduces output ripple frequency. |
| Quiescent Current | 500µA typical - minimizes standby power loss in always-on subsystems like real-time clocks or sensors. |
| Shutdown Current | <1µA - ensures negligible battery drain during deep sleep or powered-off states. |
| Feedback Voltage | 800mV ±10mV - sets precise output regulation point; used with external resistor divider to scale VO = 0.8V × (1 + R1/R2). |
| POR Delay | 80–120ms - provides reliable system reset timing after power stabilization, compatible with microcontroller reset requirements. |
Pinout & Package
The ISL97536IUZ-TK 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 only; must be separated from PGND and joined at single point near IC. |
| 2 (PGND) | Power Ground Reference | Return path for high-current power stage (LX, VIN); requires large copper pour and vias for thermal relief. |
| 3 (LX) | Switch Node Output | Drives external inductor; carries high di/dt square wave - must be routed short and wide to minimize EMI. |
| 4 (VIN) | Main Power Input | Supplies power stage; requires low-ESR ceramic capacitor placed adjacent to PIN 4 and PIN 2. |
| 5 (VDD) | Controller Supply | Provides bias for internal logic; decoupled via 0.1µF capacitor to SGND. |
| 6 (RSI) | Reset Input | Active-HI signal that forces POR low immediately; used for controlled system resets without disrupting regulation. |
| 7 (EN) | Enable Control | Logic-HI (>2.4V) enables regulation; logic-LO disables converter and reduces supply current to <1µA. |
| 8 (POR) | Open-Drain Reset Output | Asserts low for ~100ms after VO reaches target; requires external pull-up resistor (R4) to generate Power-Good signal. |
| 9 (VO) | Output Voltage Sense | Direct connection to regulated output node; used with FB to close feedback loop and reject noise. |
| 10 (FB) | Voltage Feedback Input | Monitors resistive divider output; 800mV reference enables precise VO setting across temperature and load. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated controller | Eliminates external compensation network - reduces BOM count and layout sensitivity while maintaining stability with 10–40µF ceramic output capacitors. |
| Synchronous rectification | Integrated 70mΩ PMOS and 45mΩ NMOS switches - improves efficiency by 5–10% vs. diode-based solutions and removes need for external Schottky diode. |
| Hiccup-mode protection | Auto-retry shutdown on overcurrent or over-temperature - limits average power dissipation and prevents thermal runaway during sustained fault conditions. |
| Separate SGND/PGND pins | Enforces clean ground separation - critical for minimizing noise coupling into feedback and control paths in high-efficiency DC/DC designs. |
| 100ms POR with RSI override | Provides deterministic system reset timing and allows software-triggered reset without interrupting power delivery or requiring additional logic. |
Applications
| Bar Code Readers | Portable Test Equipment |
|---|---|
Use Scenario: Handheld scanners requiring stable 1.8V or 3.3V rail for CMOS image sensor and decode ASIC under varying battery voltage (3.0–4.2V). IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated core voltage with fast transient response to handle burst-mode imaging loads. Use Value: 500µA quiescent current extends battery life between scans; hiccup-mode protection prevents latch-up during motor-induced voltage spikes. | Use Scenario: Battery-operated multimeters and signal generators needing isolated, low-noise 5V and 3.3V supplies for analog front-end and microcontroller. IC Role / Device Role / Timing Role: Compact, single-chip buck converter powering digital subsystems with minimal board area and no external compensation. Use Value: MSOP10 footprint (<0.15in²) enables integration into space-constrained handheld enclosures; 1.4MHz switching avoids audible noise and simplifies EMI filtering. |
| Cellular Phones | Small Form Factor (SFP) Modules |
Use Scenario: Powering baseband processors or RF transceivers from Li-ion battery during active call or data transmission. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with soft-start and POR to sequence power to sensitive RF circuitry. Use Value: 95% peak efficiency at 600mA reduces thermal load in sealed phone chassis; EN pin enables dynamic power gating during idle periods. | Use Scenario: Optical transceivers in networking gear requiring tightly regulated 3.3V supply with fast turn-on and reset signaling for link initialization. IC Role / Device Role / Timing Role: Standalone buck converter providing clean, sequenced power with integrated POR for compliance with SFP MSA timing requirements. Use Value: 100ms POR output meets SFP MSA "Power Good" assertion window; RSI pin allows host MCU to retrigger reset during hot-plug events. |
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, 300mA output current. | Lower output current and higher switching frequency - suited for ultra-compact, lower-power applications where size outweighs current demand. | Select when PCB area is more constrained than load current requirement and higher-frequency operation is acceptable. |
| RT8059GJ6 | 1.5MHz switching frequency, 0.6V feedback voltage, 2.5V–5.5V input, 600mA output, no integrated POR or RSI function. | Lacks POR and RSI pins - requires external reset IC or GPIO coordination for system sequencing and reset management. | Select when POR/RSI functionality is handled externally and cost-sensitive designs prioritize minimal feature set. |
Compared with TPS62231DRVR and RT8059GJ6, the ISL97536IUZ-TK offers higher 1A output current, integrated 100ms POR with RSI override, and dual-ground architecture optimized for noise-sensitive analog systems - making it preferable for mid-power portable equipment requiring robust power sequencing and thermal resilience.
Availability
ISL97536IUZ-TK is available at Aetrix Electronics and suitable for bar code readers, cellular phones, portable test equipment, Li-ion battery powered devices, and small form factor (SFP) modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL97536IUZ-TK 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, communications, and consumer markets.
The ISL97536IUZ-TK belongs to Intersil's monolithic DC/DC regulator product line, designed specifically for space-constrained, battery-powered portable electronics demanding high efficiency, low quiescent current, and integrated protection features without external compensation.
FAQ
What is the maximum output current capability of the ISL97536IUZ-TK?
The ISL97536IUZ-TK delivers up to 1A continuous output current under specified thermal conditions. Its current limit is set at approximately 1.5A, triggering hiccup-mode protection if exceeded. Performance depends on PCB layout, copper area, and ambient temperature - full 1A operation is achievable with adequate thermal design using the 10-lead MSOP package's 130°C/W θJA rating on standard FR-4 boards.
Does the ISL97536IUZ-TK require external compensation components?
No, the ISL97536IUZ-TK features an internally compensated voltage-mode controller. This eliminates the need for external compensation networks, allowing stable operation with only two ceramic capacitors (10–40µF) and one inductor (1.5–2.2µH). The fixed compensation is optimized for this component range, simplifying design and reducing bill-of-materials count.
How does the RSI pin function on the ISL97536IUZ-TK?
The RSI (Reset Input) pin on the ISL97536IUZ-TK is an active-HI signal that immediately forces the POR output low upon assertion, then holds it low for ~100ms after RSI returns to logic low. This allows the host system to trigger a synchronized reset without disrupting the regulated output voltage - a key feature for reliable firmware updates or error recovery in portable devices.
What is the purpose of having separate SGND and PGND pins on the ISL97536IUZ-TK?
The ISL97536IUZ-TK separates Signal Ground (SGND) and Power Ground (PGND) to prevent high di/dt switching currents from coupling noise into sensitive analog control circuitry. SGND serves the error amplifier and PWM logic, while PGND handles LX and VIN return paths. They must be joined at a single point near the IC to maintain clean feedback and stable regulation - a critical layout requirement confirmed in the datasheet's Layout Considerations section.
Can the ISL97536IUZ-TK operate from a single-cell Li-ion battery?
Yes, the ISL97536IUZ-TK operates from 2.5V to 6V input, fully covering the discharge range of a single-cell Li-ion battery (typically 3.0V–4.2V). Its 2.2V minimum shutdown threshold and 2.4V startup threshold ensure reliable enablement across the battery's usable voltage window, while 500µA quiescent current helps maximize runtime in low-power modes.
ISL97536IUZ-TK 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-TK FAQ
1.How can I place an order for ISL97536IUZ-TK through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97536IUZ-TK 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-TK reliable?
The price and inventory of ISL97536IUZ-TK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97536IUZ-TK is usually 5 days.
3.What payment methods are accepted for ISL97536IUZ-TK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97536IUZ-TK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97536IUZ-TK?
ISL97536IUZ-TK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97536IUZ-TK 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-TK?
For technical support, including ISL97536IUZ-TK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97536IUZ-TK requirements.
6.How does Aetrix verify that ISL97536IUZ-TK is sourced from the original manufacturer or authorized distributors?
All ISL97536IUZ-TK 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-TK meets industry standards.
7.What is the process for return or replacement of ISL97536IUZ-TK?
All ISL97536IUZ-TK units undergo pre-shipment inspection (PSI). If there is an issue with ISL97536IUZ-TK, 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-TK part is unused and in its original packaging.
Return procedure for ISL97536IUZ-TK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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