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Renesas ISL97519IUZ
- Part No.:
- ISL97519IUZ
- Manufacturer:
- Renesas
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL97519IUZ.pdf
- Description:
- IC REG BOOST ADJ 1.5A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,004
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Product details
Overview
ISL97519IUZ from Intersil is a high-frequency, constant-frequency PWM step-up DC/DC regulator with integrated 2.0A/200mΩ power MOSFET, 1% output voltage accuracy, selectable 620kHz or 1.25MHz switching frequency, and operation from 2.3V to 5.5V input to deliver up to 1A at 12V for TFT-LCD bias supplies.
For engineers reviewing the ISL97519IUZ datasheet, ISL97519IUZ pinout, ISL97519IUZ application, or ISL97519IUZ equivalent, key selection criteria include its 1.294V feedback reference, external compensation flexibility, soft-start control via capacitor, thermal shutdown at 150°C, and compatibility with low-ESR ceramic output capacitors in space-constrained portable designs.
Technical Context
The ISL97519IUZ employs current-mode PWM control with an internal transconductance error amplifier (70–150 µS) and user-configurable RC compensation network on the COMP pin, enabling stable regulation across wide load and line variations. Its dual-frequency selection (620kHz/1.25MHz) directly impacts inductor size and transient response speed without altering loop stability requirements.
Operation relies on a single-stage boost topology with synchronous rectification replaced by external Schottky diode; the LX pin drives the MOSFET drain, while FB senses a resistor-divided output referenced to 1.294V. Shutdown draws <1µA, and UVLO activates below 2.1V with 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, Li-poly, or triple-AA battery inputs without pre-regulation. |
| Output Voltage Range | 1.1×VIN to 25V - enables adjustable bias generation for TFT-LCD gate drivers and LED backlights. |
| Switching Frequency | Selectable 620kHz or 1.25MHz - allows optimization between inductor size (e.g., 10µH @ 1.25MHz) and EMI profile. |
| Feedback Reference | 1.294V ±12mV over −40°C to +105°C - ensures 1% output accuracy with standard resistor divider design. |
| Peak Switch Current Limit | 2.0A (guaranteed ≥1.7A) - sets maximum deliverable output current based on VIN/VOUT ratio and inductor DCR. |
| Quiescent Current (Shutdown) | <1µA - preserves battery life in always-on portable systems during standby mode. |
| Thermal Protection | 150°C junction shutdown with hysteresis - prevents damage under sustained overload or poor PCB thermal layout. |
Pinout & Package
ISL97519IUZ is housed in an 8-lead MSOP package (M8.118A) with maximum height of 1.1mm, optimized for ultra-thin portable applications and compatible with standard reflow profiles including Pb-free soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| COMP | Error amplifier output | Connects external RC network to set loop bandwidth and phase margin; determines transient response and stability. |
| FB | Voltage feedback input | Senses resistor-divided output; internal 1.294V reference enables precise output voltage setting (e.g., VOUT = 1.294V × (1 + R1/R2)). |
| EN | Enable/shutdown control | Logic-level input: pull low to disable regulator and reduce supply current to <1µA; no external pull-up required. |
| GND | Analog and power ground | Common return for feedback, control, and power paths; requires low-impedance PCB connection to minimize noise coupling. |
| LX | Power switch node | Drain of internal 2.0A MOSFET; connects to inductor and external Schottky diode anode; carries high di/dt switching current. |
| VDD | Analog supply input | Powers internal circuitry; must be bypassed with 0.1µF ceramic capacitor placed adjacent to pin for noise immunity. |
| FSEL | Frequency select | Ground = 620kHz; connect to VDD = 1.25MHz - selects switching frequency without external clock source. |
| SS | Soft-start control | Internal 6µA current source charges external capacitor to ramp output voltage linearly and limit inrush current. |
Key Features
| Feature | Design Value |
|---|---|
| 1% output voltage accuracy | Maintains tight regulation across temperature and load, reducing need for post-regulation trimming in display bias rails. |
| External compensation network | Enables custom loop tuning for diverse output capacitor types (ceramic/tantalum) and load dynamics without redesigning IC core. |
| Adjustable soft-start | Prevents input voltage droop and output overshoot during power-up by controlling rise time via external capacitor value. |
| Integrated 2.0A/200mΩ MOSFET | Eliminates external high-side switch, reduces BOM count, and achieves >90% efficiency at 1A output with minimal footprint. |
| −40°C to +105°C operating range | Validated for industrial-grade TFT-LCD modules and automotive infotainment displays requiring extended thermal reliability. |
Applications
| TFT-LCD Display Bias Supply | Digital Camera Flash LED Driver |
|---|---|
Use Scenario: Generating 18V–25V gate-on/gate-off voltages for active-matrix LCD panels in handheld tablets and medical monitors. IC Role / Device Role / Timing Role: Primary boost regulator providing regulated high-voltage rail with fast transient response to pixel row switching demands. Use Value: 1.25MHz operation enables use of compact 4.7µH inductors, reducing solution height to ≤1.1mm while maintaining 1% output accuracy under dynamic load steps. | Use Scenario: Driving white LEDs in smartphone front/rear cameras requiring 300–500mA pulsed current at ~30V. IC Role / Device Role / Timing Role: Constant-current-capable boost controller (via FB resistor programming) delivering precise flash intensity with minimal thermal rise. Use Value: Adjustable soft-start prevents camera module brownout during flash activation; 2.3V minimum input supports operation down to depleted battery states. |
| DSL Modem Line Interface Power | PCMCIA Card Auxiliary Rail Generator |
Use Scenario: Providing isolated 12V auxiliary supply for ADSL line driver ICs in residential gateways operating from 3.3V system rail. IC Role / Device Role / Timing Role: High-efficiency step-up converter powering analog front-end components with low-noise output via ceramic capacitor filtering. Use Value: 620kHz switching frequency balances EMI compliance with inductor size; <1µA shutdown current extends standby battery life in battery-backed modems. | Use Scenario: Generating 5V or 12V auxiliary voltage for legacy PCMCIA Type II cards inserted into industrial laptops or docking stations. IC Role / Device Role / Timing Role: Compact, self-contained boost regulator replacing discrete charge-pump solutions with higher current capability and lower ripple. Use Value: 8-lead MSOP package fits tight card-edge spacing; thermal protection prevents latch-up during hot-plug insertion under load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL97519A | Direct revision with improved thermal performance and tighter FB tolerance (±0.5% vs ±1%); same pinout and electrical interface. | Preferred for new designs requiring enhanced long-term stability and higher ambient temperature operation (>85°C). | Select ISL97519A when lifecycle continuity and margin improvement are prioritized over legacy qualification status. |
| TPS61088RHLR | Higher 2.2A switch current, wider 2.7–12V input, but fixed 500kHz/2MHz frequencies and no FSEL pin; requires different compensation design. | Better suited for multi-rail systems needing >1A output or higher input voltage headroom, but less flexible for EMI-sensitive portable layouts. | Choose TPS61088RHLR only if peak current demand exceeds 1A or input exceeds 5.5V; verify loop stability with new RC network. |
Compared with ISL97519IUZ, ISL97519A offers upgraded accuracy and thermal robustness in identical form factor, while TPS61088RHLR trades pin compatibility for higher current and input range-requiring layout and compensation changes.
Availability
ISL97519IUZ is available at Aetrix Electronics and suitable for TFT-LCD display bias supplies, DSL modem auxiliary power, and portable digital camera flash circuits requiring stable component supply with guaranteed long-term manufacturability.
Supply support for ISL97519IUZ 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 converters, precision references, and interface solutions.
The ISL97519IUZ belongs to Intersil's high-efficiency boost regulator product line, engineered specifically for space-constrained, battery-powered portable electronics demanding accurate, low-profile, and thermally robust voltage boosting.
FAQ
What is the maximum output voltage supported by the ISL97519IUZ?
The ISL97519IUZ supports output voltages from 1.1×VIN up to 25V. This range is enabled by its internal 27V LX-to-GND absolute maximum rating and 1.294V precision feedback reference. For example, with a 3.3V input, outputs up to 25V are achievable using appropriate resistor dividers and external Schottky diodes rated for ≥25V reverse voltage. The device's current limit and efficiency decrease as VOUT increases, so design validation per Table 1 in the datasheet is required.
Does the ISL97519IUZ require an external Schottky diode?
Yes, the ISL97519IUZ requires an external Schottky diode. It integrates only the high-side N-channel MOSFET switch (2.0A/200mΩ), not synchronous rectification. The diode must handle ≥2.0A peak current, exhibit low forward voltage (e.g., <0.6V), and have reverse breakdown exceeding the maximum output voltage (e.g., ≥30V for 25V output). Typical selections include 3A-rated 40V Schottky diodes such as the SS34 or RB055LAM-40.
How does the FSEL pin affect the ISL97519IUZ switching frequency?
The FSEL pin selects between two fixed switching frequencies: grounding FSEL sets 620kHz (typical), while connecting it to VDD sets 1.25MHz (typical). These frequencies are factory-trimmed and do not require external clock components. The choice affects inductor size (smaller at 1.25MHz), output ripple magnitude, and EMI profile-1.25MHz enables 10µH inductors versus 22µH at 620kHz for identical output current and ripple specs.
Can the ISL97519IUZ operate from a single 2.5V alkaline cell?
Yes, the ISL97519IUZ operates from inputs as low as 2.3V, making it compatible with single 2.5V alkaline or NiMH cells. At 2.5V input, it can generate 5V, 9V, or 12V outputs depending on duty cycle limits (≤92% at 620kHz, ≤90% at 1.25MHz) and load. Efficiency remains >85% at moderate loads (e.g., 200mA @ 9V), but maximum output current decreases as VIN approaches the lower limit due to reduced headroom for MOSFET conduction and diode losses.
What is the purpose of the COMP pin on the ISL97519IUZ?
The COMP pin is the output of the internal transconductance error amplifier and serves as the control node for loop compensation. Connecting a series RC network from COMP to GND sets the dominant pole and zero of the voltage loop, enabling stable operation with various output capacitor types (e.g., 22µF X5R ceramic or 47µF tantalum). Typical values are 2k–7.5kΩ resistor and 3–10nF capacitor; improper compensation causes oscillation or sluggish transient response, especially under light-load conditions.
ISL97519IUZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.3V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 620kHz, 1.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ISL97519IUZ FAQ
1.How can I place an order for ISL97519IUZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97519IUZ 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 ISL97519IUZ reliable?
The price and inventory of ISL97519IUZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97519IUZ is usually 5 days.
3.What payment methods are accepted for ISL97519IUZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97519IUZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97519IUZ?
ISL97519IUZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97519IUZ 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 ISL97519IUZ?
For technical support, including ISL97519IUZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97519IUZ requirements.
6.How does Aetrix verify that ISL97519IUZ is sourced from the original manufacturer or authorized distributors?
All ISL97519IUZ 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 ISL97519IUZ meets industry standards.
7.What is the process for return or replacement of ISL97519IUZ?
All ISL97519IUZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL97519IUZ, 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 ISL97519IUZ part is unused and in its original packaging.
Return procedure for ISL97519IUZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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