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Renesas ISL97519AIUZ-T
- Part No.:
- ISL97519AIUZ-T
- Manufacturer:
- Renesas
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
ISL97519AIUZ-T.pdf
- Description:
- IC REG BOOST ADJ 1.5A 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,627
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Product details
Overview
ISL97519AIUZ-T from Intersil is a high-efficiency, constant-frequency PWM step-up regulator with integrated 2.0A/200mΩ MOSFET, 600kHz/1.2MHz selectable switching frequency, 2.3V–5.5V input range, and up to 25V output capability. It delivers 1A output current at >90% efficiency and features adjustable soft-start, internal thermal protection, and operation down to -40°C for TFT-LCD backlight power supplies.
For engineers reviewing the ISL97519AIUZ-T datasheet, ISL97519AIUZ-T pinout, ISL97519AIUZ-T application, or ISL97519AIUZ-T equivalent, key selection criteria include its dual-frequency PWM control, external compensation flexibility for ceramic capacitor compatibility, low shutdown current (<1µA), and MSOP-8 package with 1.1mm max height for space-constrained portable designs.
Technical Context
The ISL97519AIUZ-T employs current-mode PWM control with an internal transconductance error amplifier (70–150 µS) and user-configurable RC compensation network on the COMP pin. Its dual-frequency architecture uses the FSEL pin to select between 620kHz (±120kHz) or 1.25MHz (±250kHz) switching, enabling trade-offs between inductor size and transient response.
It integrates a 2.0A peak-current-limited N-channel MOSFET with 200mΩ rDS(ON) at VDD = 2.7V, supports soft-start via external capacitor on SS pin (3µA charge current), and includes VDD UVLO with 2.1V turn-on threshold and 140mV hysteresis. Feedback regulation targets 1.24V ±1.1% at FB pin with 0.01–0.5µA input bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.3V to 5.5V - supports single-cell Li-ion, Li-polymer, or triple-AA battery inputs without pre-regulation. |
| Output Voltage Range | 1.1×VIN up to 25V - enables programmable boost for LCD bias rails and white LED drivers. |
| Switching Frequency | 620kHz or 1.25MHz - selectable via FSEL pin; higher frequency allows smaller inductors (e.g., 2–10µH) and faster load transient recovery. |
| Peak Switch Current Limit | 1.5A (min) at VDD > 2.8V - ensures robust overcurrent protection while supporting ≥1A continuous output under typical conditions. |
| Feedback Reference Voltage | 1.24V ±1.1% - precise reference enables accurate output voltage setting with standard resistor dividers (e.g., R1/R2 ≤ 100kΩ). |
| Shutdown Quiescent Current | <1µA - minimizes battery drain in standby mode for portable equipment requiring long shelf life. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and consumer portable applications including handheld devices and DSL modems. |
| Package | 8-lead MSOP, 1.1mm max height - ultra-low-profile surface-mount package compatible with automated assembly and tight board stacking. |
Pinout & Package
ISL97519AIUZ-T is housed in an 8-lead MSOP package (JEDEC MO-187-AA compliant, pkg drawing M8.118A) with maximum height of 1.1mm, 0.65mm lead pitch, and exposed pad not present. The package is Pb-free, RoHS-compliant, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - COMP | Error amplifier output | Connects external RC network to ground for loop compensation; sets bandwidth and phase margin for stable regulation with low-ESR ceramic capacitors. |
| 2 - FB | Voltage feedback input | Senses divided output voltage; internal 1.24V reference enables output programming from 5V to 25V using standard resistor divider networks. |
| 3 - EN | Enable/shutdown control | Logic-level input: pull low to disable regulator and reduce supply current to <1µA; compatible with microcontroller GPIO or system power sequencers. |
| 4 - GND | Analog and power ground | Common return path for feedback, control, and power circuits; requires low-impedance PCB connection to minimize noise coupling and ensure stability. |
| 5 - LX | Power switch node | Drain of internal 2.0A MOSFET; connects to inductor and Schottky diode anode; carries high di/dt switching current and requires careful layout to limit EMI. |
| 6 - VDD | Analog supply input | Powers internal circuitry; must be bypassed with 0.1µF ceramic capacitor close to pin; UVLO activates below 2.1V to prevent erratic startup. |
| 7 - FSEL | Frequency select | Logic input: grounded → 620kHz; tied to VDD or high → 1.25MHz; determines inductor size, efficiency vs. transient trade-off, and EMI profile. |
| 8 - SS | Soft-start control | Accepts external capacitor to linearly ramp current limit during startup; prevents inrush into output capacitors and stabilizes output voltage rise. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 2.0A/200mΩ Power MOSFET | Eliminates external high-side switch and reduces BOM count; supports ≥1A output with minimal external components. |
| Selectably Dual-Frequency PWM Control | 620kHz or 1.25MHz operation enables optimization for either compact magnetics (1.25MHz) or lower EMI/noise (620kHz) per application need. |
| External Compensation (COMP Pin) | Allows full control over loop dynamics using series RC network; supports stable operation with low-ESR ceramic output capacitors down to 22µF. |
| Adjustable Soft-Start (SS Pin) | 3µA constant-current charge enables precise control of startup time (e.g., 540µs with 27nF); prevents overshoot and limits inrush into large output caps. |
| Thermal Protection & UVLO | Internal OTP triggers at 150°C; VDD UVLO with 140mV hysteresis ensures clean, repeatable startup across temperature and input voltage variations. |
| Pb-Free, Halogen-Free MSOP-8 | RoHS-compliant 8-lead MSOP with 1.1mm max height meets modern environmental requirements and fits ultra-thin portable PCB stacks. |
Applications
| TFT-LCD Backlight Power | DSL Modem Power Supply |
|---|---|
Use Scenario: Driving CCFL or LED backlights in portable LCD panels requiring 12–25V from 3.3V or 5V logic rails. IC Role / Device Role / Timing Role: Primary boost converter providing regulated high-voltage rail with fast transient response to dimming commands. Use Value: Delivers >90% efficiency at 1A output and supports 1.25MHz switching for compact 10µH inductors, reducing board area by ~40% vs. 620kHz designs. |
Use Scenario: Generating 12V bias for line driver ICs and analog front-end circuitry in residential DSL modems powered from 5V USB or wall adapters. IC Role / Device Role / Timing Role: Standalone step-up regulator supplying isolated analog power with low quiescent current during sleep modes. Use Value: Draws <1µA in shutdown and operates down to 2.3V input, enabling reliable brownout recovery and extended low-power operation. |
| Digital Camera Flash Charging | GSM/CDMA Phone Display Bias |
Use Scenario: Charging high-voltage capacitors for xenon flash modules in compact digital cameras operating from single-cell lithium batteries. IC Role / Device Role / Timing Role: High-efficiency boost stage delivering up to 25V with controlled inrush via SS pin to avoid battery sag. Use Value: Integrated 2.0A MOSFET and 1.25MHz option allow <100ms flash-charge times with minimal external components and no external gate driver. |
Use Scenario: Providing stable 15–20V bias for OLED or TFT display drivers in dual-mode GSM/CDMA handsets with tight space constraints. IC Role / Device Role / Timing Role: Compact, low-profile DC-DC solution mounted directly beneath display flex cable in thin handset form factors. Use Value: 1.1mm max height MSOP-8 package enables placement in narrow board margins; -40°C to +85°C rating ensures reliability across global operating environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 2.5A switch current, fixed 1MHz frequency, no FSEL pin; requires external compensation but offers wider VIN (2.7–12V). | Better suited for higher-output-current applications (>1.2A) and systems needing fixed-frequency EMI control without pin configuration. | Choose TPS61088RHLR when output current exceeds 1A or input voltage may exceed 5.5V; ISL97519AIUZ-T remains preferred for dual-frequency flexibility and sub-2.7V start-up. |
| MAX17062ETA+ | Fixed 1.2MHz frequency, 1.5A switch, integrated Schottky diode; lacks external compensation and soft-start adjustability. | Targeted at cost-sensitive, space-constrained applications where design simplicity outweighs tuning flexibility. | Select MAX17062ETA+ for rapid prototyping with minimal external parts; ISL97519AIUZ-T provides superior loop control and startup behavior for noise-sensitive displays. |
Compared with TPS61088RHLR and MAX17062ETA+, the ISL97519AIUZ-T uniquely combines dual-frequency selection, user-adjustable compensation, and sub-2.7V operation-making it optimal for portable display power where efficiency, layout compactness, and startup reliability are jointly critical.
Availability
ISL97519AIUZ-T is available at Aetrix Electronics and suitable for TFT-LCD displays, DSL modems, and digital cameras requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for ISL97519AIUZ-T 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 amplifiers, and interface solutions.
The ISL97519AIUZ-T belongs to Intersil's high-frequency boost regulator product line, engineered specifically for portable display power applications demanding high efficiency, small footprint, and robust thermal performance in consumer and industrial handheld equipment.
FAQ
What is the minimum input voltage required for ISL97519AIUZ-T to operate?
The ISL97519AIUZ-T operates down to 2.3V input voltage, enabling direct use with single-cell Li-ion (2.7–4.2V) or alkaline (2.4–4.5V) sources. Its VDD UVLO turns on at 2.1V nominal with 140mV hysteresis, ensuring reliable startup even under battery droop conditions. Below 2.3V, output regulation degrades progressively, and full 1A capability is not guaranteed.
How does the FSEL pin affect ISL97519AIUZ-T performance?
The FSEL pin selects between 620kHz (FSEL = GND) and 1.25MHz (FSEL = VDD or high) switching frequencies. At 1.25MHz, the ISL97519AIUZ-T supports smaller inductors (e.g., 4.7µH vs. 10µH) and faster transient response but slightly lower peak efficiency (~1–2%) due to increased switching losses. At 620kHz, efficiency improves marginally while EMI is reduced and layout is more forgiving.
Can ISL97519AIUZ-T drive a 25V output reliably?
Yes - the ISL97519AIUZ-T supports outputs up to 25V (1.1×VIN limit applies only when VIN ≥ 5V; for VIN = 3.3V, VOUT can reach 25V). Its LX pin is rated to 27V absolute maximum, and internal MOSFET rDS(ON) remains stable across the full output range. For outputs >25V, a cascaded external MOSFET is required per Figure 14 in the datasheet.
What is the purpose of the COMP pin on ISL97519AIUZ-T?
The COMP pin is the output of the internal transconductance error amplifier and serves as the loop compensation node. Connecting a series RC network from COMP to GND sets the dominant pole and zero to stabilize the control loop, enabling robust regulation with low-ESR ceramic output capacitors. Typical values are 1–5kΩ resistor and 3–10nF capacitor, selected based on inductor value and desired transient response.
Does ISL97519AIUZ-T require an external Schottky diode?
Yes - the ISL97519AIUZ-T requires an external Schottky diode connected between LX and VOUT. The diode must withstand ≥25V reverse voltage, conduct ≥2.0A peak current, and exhibit low forward voltage (≤0.6V) and fast recovery to maintain >90% efficiency. Recommended types include 30V/3A Schottky diodes such as RB055LAM-40 or PMEG3015EH.
ISL97519AIUZ-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
ISL97519AIUZ-T FAQ
1.How can I place an order for ISL97519AIUZ-T through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL97519AIUZ-T 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 ISL97519AIUZ-T reliable?
The price and inventory of ISL97519AIUZ-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL97519AIUZ-T is usually 5 days.
3.What payment methods are accepted for ISL97519AIUZ-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL97519AIUZ-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL97519AIUZ-T?
ISL97519AIUZ-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL97519AIUZ-T 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 ISL97519AIUZ-T?
For technical support, including ISL97519AIUZ-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL97519AIUZ-T requirements.
6.How does Aetrix verify that ISL97519AIUZ-T is sourced from the original manufacturer or authorized distributors?
All ISL97519AIUZ-T 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 ISL97519AIUZ-T meets industry standards.
7.What is the process for return or replacement of ISL97519AIUZ-T?
All ISL97519AIUZ-T units undergo pre-shipment inspection (PSI). If there is an issue with ISL97519AIUZ-T, 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 ISL97519AIUZ-T part is unused and in its original packaging.
Return procedure for ISL97519AIUZ-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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