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Renesas ISL97656IRTZ-TS2720
- Part No.:
- ISL97656IRTZ-TS2720
- Manufacturer:
- Renesas
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ISL97656IRTZ-TS2720.pdf
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Product details
Overview
ISL97656IRTZ-TS2720 from Intersil is a non-synchronous current-mode step-up DC/DC regulator with an integrated 4.0A/120mΩ low-side MOSFET, 2.2V–6.0V input range, 1.1×VIN to 24V output range, and user-selectable 640kHz or 1.22MHz switching frequency-designed for high-efficiency power conversion in TFT-LCD bias supplies and portable digital cameras.
For engineers reviewing the ISL97656IRTZ-TS2720 datasheet, ISL97656IRTZ-TS2720 pinout, ISL97656IRTZ-TS2720 application, or ISL97656IRTZ-TS2720 equivalent, key selection criteria include its 4A integrated switch, dual-frequency operation, external compensation flexibility, soft-start control via SS pin, and thermal protection for compact, thermally constrained designs.
Technical Context
The ISL97656IRTZ-TS2720 implements constant-frequency PWM control with current-mode architecture, separating fast inner current loop (no external compensation needed) from slower outer voltage loop (compensated via COMP pin RC network). Its internal transconductance error amplifier (70–250 µA/V) interfaces with a 1.24V reference to regulate output via FB pin.
Switching frequency is selected by FREQ pin logic level: grounded for 640kHz (±140kHz accuracy), tied to VIN for 1.22MHz (±220kHz accuracy). The device supports adjustable soft-start via external capacitor on SS pin, charged by a 4.5µA internal current source, and enters <1µA shutdown when EN is low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 6.0V - enables direct battery input from single-cell Li-ion (3.0–4.2V) or two-cell alkaline (2.4–3.2V). |
| Output Voltage Range | 1.1×VIN to 24V - supports TFT-LCD gate drivers requiring ≥18V and VCOM supplies up to 24V. |
| Switch Current Limit | 3.8A to 5.1A peak - sets maximum deliverable output current under worst-case duty cycle and input conditions. |
| Switch rDS(ON) | 120mΩ at VIN = 2.7V - determines conduction loss and thermal rise during high-current pulses. |
| Feedback Reference | 1.24V ±20mV - defines output regulation accuracy; output setpoint calculated as VOUT = 1.24V × (1 + R1/R2). |
| Shutdown Current | <1µA - ensures ultra-low quiescent drain in battery-powered standby modes. |
| Thermal Shutdown | 150°C - protects against sustained overload or poor PCB heatsinking in sealed enclosures. |
Pinout & Package
ISL97656IRTZ-TS2720 is housed in a 10-lead Thin Dual Flat No-lead (TDFN) package with exposed thermal pad (L10.3x3B), measuring 3.0mm × 3.0mm × 1.1mm max height and optimized for low-inductance layout and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COMP) | Error amplifier output | Connects external RC network to set voltage-loop bandwidth and phase margin for stable transient response. |
| 2 (FB) | Voltage feedback input | Senses divided output voltage; internal 1.24V reference enables precise output regulation across load/line variations. |
| 3 (EN) | Enable control input | Logic-high (>1.5V) activates regulator; logic-low (<0.5V) forces <1µA shutdown-supports system-level power sequencing. |
| 4,5 (GND) | Power ground return | Dual GND pins reduce ground impedance and improve noise immunity in high di/dt switching paths. |
| 6,7 (LX) | Switch node | Drain of internal 4A MOSFET; connects to inductor and Schottky diode anode-requires tight layout to minimize EMI. |
| 8 (VIN) | Analog input supply | Primary power input; requires local 0.1µF ceramic bypass to suppress high-frequency supply noise. |
| 9 (FREQ) | Frequency select | GND = 640kHz (larger inductors, lower core loss); VIN = 1.22MHz (smaller inductors, faster transient response). |
| 10 (SS) | Soft-start control | External capacitor sets output voltage ramp rate-prevents inrush current and stabilizes startup into large capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4.0A low-rDS(ON) MOSFET | Eliminates external switch, reduces BOM count, and improves efficiency over discrete boost solutions at 1–2A loads. |
| Selectable 640kHz / 1.22MHz switching | Enables trade-off between inductor size (1.22MHz → ~50% smaller) and efficiency (640kHz → ~1–2% higher at mid-load). |
| Adjustable soft-start via SS pin | Prevents output overshoot and limits inrush into downstream LDOs or display panels during power-on sequencing. |
| External compensation (COMP pin) | Allows optimization of loop stability and transient response for diverse output capacitors (ceramic vs. tantalum) and load profiles. |
| Internal thermal protection | Shuts down regulator at 150°C junction temperature-prevents permanent damage during sustained overload or airflow failure. |
Applications
| TFT-LCD Panel Bias Supply | Digital Camera Flash LED Driver |
|---|---|
Use Scenario: Generating 18–24V gate drive voltages (VGH/VGL) and VCOM for active-matrix LCD panels in handheld devices. IC Role / Device Role / Timing Role: Primary boost converter delivering regulated high-voltage rail with tight line/load regulation and low ripple. Use Value: Enables use of small 2.2µH–10µH inductors and ceramic output caps due to 1.22MHz option, reducing board area by >30% versus 300kHz alternatives. |
Use Scenario: Driving high-brightness white LEDs in DSLR and mirrorless camera flash modules requiring 3.3V–5V input to 30–40V output. IC Role / Device Role / Timing Role: Constant-current LED driver front-end, supplying stable high-voltage bus to external current-sink ICs or linear drivers. Use Value: 4A switch supports burst-mode flash currents up to 2A average; soft-start prevents camera MCU reset during flash activation. |
| Portable Medical Imaging Display | GSM/CDMA Handset Backlight |
Use Scenario: Powering grayscale OLED or transflective LCD displays in battery-operated ultrasound or point-of-care monitors. IC Role / Device Role / Timing Role: Main display power supply operating from 3.3V or 3.7V Li-ion battery with dynamic brightness scaling. Use Value: 2.2V minimum input allows operation down to 2.5V battery voltage; <1µA shutdown extends standby time beyond 30 days. |
Use Scenario: Providing 15–20V backlight supply for multi-string LED arrays in legacy 2G/3G mobile handsets. IC Role / Device Role / Timing Role: High-efficiency boost stage preceding current-balancing LED driver ICs. Use Value: 90%+ efficiency at 100mA–500mA loads minimizes thermal impact in space-constrained phone PCBs near RF sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 6.5A switch, fixed 1MHz frequency, no FREQ pin; requires external compensation but offers higher peak current. | Better suited for >2A continuous LED driver loads; lacks dual-frequency flexibility for optimizing size vs. efficiency. | Choose TPS61088RHLR when output current exceeds 1.8A or when fixed 1MHz simplifies EMI filtering. |
| MAX17065ETA+ | Lower 2.5A switch, 1.2MHz only, integrated Schottky, no COMP pin-fully integrated but less configurable. | Ideal for cost-sensitive, low-complexity LCD bias where 1.2MHz suffices and external compensation isn't needed. | Choose MAX17065ETA+ for simplified design with fewer external components and tighter footprint constraints. |
Compared with TPS61088RHLR and MAX17065ETA+, the ISL97656IRTZ-TS2720 uniquely balances configurability (dual-frequency, external COMP/SS), thermal robustness (150°C shutdown), and integration (4A switch, 120mΩ rDS(ON))-making it optimal for mid-power portable displays where layout flexibility and thermal headroom are critical.
Availability
ISL97656IRTZ-TS2720 is available at Aetrix Electronics and suitable for TFT-LCD displays, portable medical imaging systems, and GSM/CDMA handset power management requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL97656IRTZ-TS2720 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 semiconductor designer known for high-performance DC/DC converters, precision amplifiers, and interface ICs.
The ISL97656IRTZ-TS2720 belongs to Intersil's high-efficiency boost regulator product line, engineered specifically for space-constrained, battery-powered visual interfaces demanding high-voltage generation with minimal external components.
FAQ
What is the maximum output voltage supported by the ISL97656IRTZ-TS2720?
The ISL97656IRTZ-TS2720 supports an output voltage range from 1.1×VIN up to 24V. This is enforced by internal circuitry limiting LX-to-GND voltage to 26V absolute maximum, allowing safe operation into 24V loads such as TFT-LCD gate drivers. Output voltage is set externally using a resistor divider on the FB pin referenced to the 1.24V internal bandgap.
Does the ISL97656IRTZ-TS2720 require an external Schottky diode?
Yes, the ISL97656IRTZ-TS2720 is a non-synchronous boost controller with an integrated low-side MOSFET only; it requires an external Schottky diode connected between LX and VOUT. The diode must withstand ≥24V reverse voltage and conduct ≥4A peak current, with low forward voltage (≤0.6V) to maintain high efficiency.
How does the FREQ pin affect switching frequency and design trade-offs for the ISL97656IRTZ-TS2720?
The FREQ pin selects between 640kHz (FREQ = GND) and 1.22MHz (FREQ = VIN). At 1.22MHz, inductor size reduces ~50%, enabling smaller magnetics and faster transient response-but conduction losses increase slightly. At 640kHz, efficiency improves 1–2% at mid-load and EMI filtering is simpler, making it preferable for noise-sensitive analog sections.
Can the ISL97656IRTZ-TS2720 operate from a single-cell Li-ion battery throughout its full discharge curve?
Yes-the ISL97656IRTZ-TS2720 operates from 2.2V to 6.0V input, covering the full discharge range of a single-cell Li-ion battery (2.8V–4.2V nominal, down to 2.5V cutoff). Its 2.2V UVLO threshold with 50mV hysteresis ensures reliable startup even at end-of-life battery voltage without brownout resets.
What thermal considerations apply to the ISL97656IRTZ-TS2720 in a 10-lead TDFN package?
The ISL97656IRTZ-TS2720 uses a 10-lead TDFN with exposed thermal pad (θJC = 3°C/W typical). To maintain junction temperature below 135°C, the PCB must provide ≥100mm² copper area connected to the pad via ≥4 thermal vias. Efficiency curves show >90% at 500mA load, but thermal derating begins above 1.2A continuous output at 6V input due to rDS(ON) losses.
ISL97656IRTZ-TS2720 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
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- -
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- Voltage - Output (Min/Fixed):
- -
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- Current - Output:
- -
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- Synchronous Rectifier:
- -
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ISL97656IRTZ-TS2720 FAQ
1.How can I place an order for ISL97656IRTZ-TS2720 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97656IRTZ-TS2720 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 ISL97656IRTZ-TS2720 reliable?
The price and inventory of ISL97656IRTZ-TS2720 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97656IRTZ-TS2720 is usually 5 days.
3.What payment methods are accepted for ISL97656IRTZ-TS2720?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97656IRTZ-TS2720 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97656IRTZ-TS2720?
ISL97656IRTZ-TS2720 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97656IRTZ-TS2720 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 ISL97656IRTZ-TS2720?
For technical support, including ISL97656IRTZ-TS2720 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97656IRTZ-TS2720 requirements.
6.How does Aetrix verify that ISL97656IRTZ-TS2720 is sourced from the original manufacturer or authorized distributors?
All ISL97656IRTZ-TS2720 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 ISL97656IRTZ-TS2720 meets industry standards.
7.What is the process for return or replacement of ISL97656IRTZ-TS2720?
All ISL97656IRTZ-TS2720 units undergo pre-shipment inspection (PSI). If there is an issue with ISL97656IRTZ-TS2720, 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 ISL97656IRTZ-TS2720 part is unused and in its original packaging.
Return procedure for ISL97656IRTZ-TS2720:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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