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Renesas ISL97656IRTZ
- Part No.:
- ISL97656IRTZ
- Manufacturer:
- Renesas
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
ISL97656IRTZ.pdf
- Description:
- IC REG BOOST ADJ 3.8A 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,111
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Product details
Overview
ISL97656IRTZ from Intersil is a non-synchronous step-up DC/DC regulator with an integrated 4.0A/120mΩ low-side MOSFET, 640kHz or 1.22MHz selectable switching frequency, 2.2V–6.0V input range, and 1.1×VIN to 24V output range-designed for TFT-LCD bias supplies in portable displays.
For engineers reviewing the ISL97656IRTZ datasheet, ISL97656IRTZ pinout, ISL97656IRTZ application, or ISL97656IRTZ equivalent, key selection criteria include its ultra-low shutdown current (<1µA), adjustable soft-start via external capacitor, external compensation for ceramic-capacitor compatibility, thermal protection, and compact 10-lead TDFN (3mm × 3mm, 0.8mm max height) package.
Technical Context
The ISL97656IRTZ uses current-mode PWM control with fixed-frequency operation and internal transconductance error amplifier (70–250µA/V) for stable loop response. Its architecture supports external RC compensation on the COMP pin to optimize transient performance with low-ESR ceramic output capacitors.
It implements selectable frequency via the FREQ pin (GND = 640kHz, VIN = 1.22MHz), enabling trade-offs between inductor size and efficiency. The device features integrated over-temperature protection (150°C trip), UVLO with 2.10V rising threshold and 50mV hysteresis, and soft-start controlled by a 4.5µA internal current source charging an external capacitor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 6.0V - supports single-cell Li-ion, Li-polymer, or triple-AA battery inputs without pre-regulation. |
| Output Voltage Range | 1.1×VIN to 24V - enables flexible TFT-LCD panel bias generation (e.g., AVDD, VGH) from low-input sources. |
| Switching Frequency | 640kHz or 1.22MHz - allows use of ≤10µH inductors and improves load transient response time. |
| Integrated Switch | 4.0A peak / 120mΩ rDS(ON) - delivers >90% efficiency at 1A–2A loads while minimizing board area and thermal design complexity. |
| Shutdown Current | <1µA - extends battery life in standby mode for portable equipment and handheld displays. |
| Feedback Reference | 1.24V ±20mV - enables precise output regulation using standard resistor dividers with minimal bias current error (≤0.5µA). |
| Thermal Protection | 150°C trip temperature - prevents permanent damage during overload or poor heatsinking conditions. |
Pinout & Package
ISL97656IRTZ is housed in a 10-lead Thin Dual Flat No-lead (TDFN) package (3.0mm × 3.0mm, 0.8mm max height) with exposed thermal pad for enhanced power dissipation. Pin numbering follows standard top-view orientation with pin 1 marked in the index area.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COMP) | Compensation node | Output of internal error amplifier; connects to RC network for loop stability and transient optimization. |
| 2 (FB) | Voltage feedback input | Senses divided output voltage; compares to 1.24V reference to regulate output with ±0.2% line/load regulation. |
| 3 (EN) | Enable control | Logic-level input (VIH ≥1.5V); high enables converter, low disables with <1µA quiescent draw. |
| 4,5 (GND) | Power ground | Common return path for switch, controller, and analog circuitry; must connect to thermal pad for thermal performance. |
| 6,7 (LX) | Switch node | Drain of internal 4A MOSFET; connects to inductor and Schottky diode anode-requires low-inductance layout. |
| 8 (VIN) | Analog supply input | Primary power input (2.2–6.0V); requires local 0.1µF ceramic bypass capacitor for noise suppression. |
| 9 (FREQ) | Frequency select | Digital input: GND selects 640kHz, VIN selects 1.22MHz-no external pull-up/down required. |
| 10 (SS) | Soft-start control | Connects to external capacitor; internal 4.5µA current source ramps output voltage to limit inrush current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4A low-rDS(ON) MOSFET | Reduces BOM count and PCB footprint versus discrete switch solutions; eliminates gate drive design effort. |
| Selectable 640kHz / 1.22MHz switching | Enables optimization of magnetic size vs. efficiency-1.22MHz supports <4.7µH inductors for space-constrained layouts. |
| External compensation (COMP pin) | Allows tuning of phase margin and bandwidth with RC network-supports stable operation with X5R/X7R ceramic output caps. |
| Adjustable soft-start (SS pin) | Prevents input voltage droop and output overshoot during startup by controlling current limit ramp rate. |
| Thermal shutdown and UVLO | Provides autonomous fault recovery: UVLO prevents start-up below 2.10V; thermal cutoff at 150°C protects silicon integrity. |
Applications
| TFT-LCD Panel Bias Supply | Portable Digital Camera Power |
|---|---|
|
Use Scenario: Generating 18V AVDD and 22V VGH for active-matrix LCD panels in handheld tablets and e-readers. IC Role / Device Role / Timing Role: Primary boost regulator delivering regulated high-voltage rails from 3.3V or 3.7V battery sources. Use Value: Achieves >91% efficiency at 1.2A load with 1.22MHz operation, enabling smaller inductors and reduced EMI filtering. |
Use Scenario: Powering CCD/CMOS image sensor bias and flash LED drivers in compact digital cameras. IC Role / Device Role / Timing Role: High-efficiency step-up converter supplying 5V/9V rails from single Li-ion cell (3.0–4.2V). Use Value: Ultra-low 0.5µA typical shutdown current extends standby battery life; soft-start prevents sensor reset glitches. |
| DSL Modem Line Driver Supply | GSM/CDMA Handset Backlight |
|
Use Scenario: Providing +12V rail for line driver amplifiers in residential DSL modems operating from 5V USB input. IC Role / Device Role / Timing Role: Non-isolated boost stage converting 5V to 12V with tight load regulation (±0.3%) across 50–300mA. Use Value: 640kHz option delivers highest efficiency (>93%) at mid-load; FREQ pin simplifies dual-frequency platform reuse. |
Use Scenario: Driving white LED strings (3–4 LEDs in series) requiring ~12V from 3.6V GSM handset battery. IC Role / Device Role / Timing Role: Constant-voltage boost source feeding LED driver IC or direct PWM-controlled current sink. Use Value: Integrated 4A switch supports up to 350mA LED current with minimal external components; thermal protection prevents overheating during call bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Synchronous rectification, 5.5A switch, 2.7–12V input, fixed 500kHz/1.1MHz, no FREQ pin. | Better light-load efficiency due to synchronous operation; lacks frequency-select flexibility and external compensation. | Preferred when higher efficiency at <100mA loads is critical and layout allows larger inductor (due to lower fSW default). |
| MAX17065ETA+ | Non-synchronous, 3.5A switch, 2.5–5.5V input, 600kHz/1.2MHz, integrated soft-start, no COMP pin. | Smaller input range limits use with 2.2V cold-start batteries; fixed compensation reduces design flexibility for ceramic caps. | Consider when footprint constraints favor 2mm × 2mm TDFN and full 2.2V start-up is not required. |
Compared with TPS61088RHLR and MAX17065ETA+, the ISL97656IRTZ uniquely combines wide 2.2V input capability, user-selectable frequency, and external compensation-making it optimal for portable display power where battery voltage sag, EMI sensitivity, and ceramic capacitor compatibility are critical.
Availability
ISL97656IRTZ is available at Aetrix Electronics and suitable for TFT-LCD bias supplies, portable camera power systems, and DSL modem line driver applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for ISL97656IRTZ 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 company focused on high-performance power conversion, precision analog, and interface solutions.
The ISL97656IRTZ belongs to Intersil's high-efficiency DC/DC boost regulator product line, engineered specifically for space-constrained, battery-powered display and imaging applications demanding low quiescent current and robust thermal behavior.
FAQ
What is the minimum input voltage required for ISL97656IRTZ to start switching?
The ISL97656IRTZ features an input undervoltage lockout (UVLO) with a rising threshold of 2.10V ±0.10V and 50mV hysteresis. It begins switching only when VIN exceeds 2.10V, ensuring reliable startup from partially discharged batteries. Below this, the device remains in shutdown with <1µA current draw. This behavior is confirmed in the Absolute Maximum Ratings and Electrical Specifications sections of the FN6439 datasheet.
Can ISL97656IRTZ operate with ceramic output capacitors?
Yes, the ISL97656IRTZ is explicitly designed for use with low-ESR ceramic output capacitors. Its external compensation pin (COMP) allows tuning of the control loop for stability with X5R/X7R MLCCs. The datasheet recommends 22µF ceramic output capacitance and notes that a 0.1µF ceramic capacitor in parallel further reduces high-frequency switching noise-enabling clean, compact power designs without tantalum or electrolytic caps.
How does the FREQ pin affect ISL97656IRTZ performance?
The FREQ pin on the ISL97656IRTZ selects between two fixed switching frequencies: grounding the pin sets 640kHz operation (typical 93% efficiency at 1A), while connecting it to VIN selects 1.22MHz (faster transient response, smaller inductors). Frequency choice directly impacts inductor size, efficiency vs. load profile, and EMI filter requirements-no external components are needed for selection, and both modes are production-tested per the datasheet.
What is the maximum guaranteed output current for ISL97656IRTZ?
The ISL97656IRTZ guarantees a minimum peak switch current limit of 3.8A (typical 4.0A), which determines maximum output current based on input/output voltage, duty cycle, and inductor ripple. At VIN=3.3V, VOUT=12V, and 640kHz, the practical continuous output current is ~1.2A (per efficiency curves on page 4). Higher output currents require careful thermal management and proper PCB copper area, as the device's θJA is 53°C/W in standard layout.
Does ISL97656IRTZ include built-in protection features?
Yes, the ISL97656IRTZ integrates multiple protection functions: thermal shutdown triggers at 150°C (with automatic recovery), input UVLO prevents operation below 2.10V, and current limiting safeguards against overload. These are hardwired features-not configurable-and are validated across the full -40°C to +85°C operating range. No external components are required to enable any of these protections.
ISL97656IRTZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.2V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 3.8A (Switch)
- Frequency - Switching:
- 640kHz, 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN-EP (3x3)
ISL97656IRTZ FAQ
1.How can I place an order for ISL97656IRTZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97656IRTZ 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 reliable?
The price and inventory of ISL97656IRTZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97656IRTZ is usually 5 days.
3.What payment methods are accepted for ISL97656IRTZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97656IRTZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97656IRTZ?
ISL97656IRTZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97656IRTZ 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?
For technical support, including ISL97656IRTZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97656IRTZ requirements.
6.How does Aetrix verify that ISL97656IRTZ is sourced from the original manufacturer or authorized distributors?
All ISL97656IRTZ 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 meets industry standards.
7.What is the process for return or replacement of ISL97656IRTZ?
All ISL97656IRTZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL97656IRTZ, 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 part is unused and in its original packaging.
Return procedure for ISL97656IRTZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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