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Renesas EL7515IY
- Part No.:
- EL7515IY
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
EL7515IY.pdf
- Description:
- IC REG BOOST ADJ 1A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,926
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Product details
Overview
EL7515IY from Intersil is a high-frequency PWM step-up DC/DC regulator with integrated 1.4A N-channel MOSFET, delivering up to 600mA output current at 92% efficiency, operating from 1.8V–13.2V input to 4.5V–17V output, and supporting adjustable switching frequency up to 1.2MHz - used in DSL line cards and portable TFT-LCD bias supplies.
For engineers reviewing the EL7515IY datasheet, EL7515IY pinout, EL7515IY application, or EL7515IY equivalent, key selection considerations include its 10-lead MSOP package with 1.1mm max height, <1µA shutdown current, low-battery detection (LBI/LBO), and soft-start control via external capacitor - critical for space-constrained, battery-powered systems requiring stable boost conversion.
Technical Context
The EL7515IY implements fixed-frequency PWM control with internal oscillator timing set by an external resistor on the RT pin, enabling precise frequency adjustment from ~600kHz to 1.2MHz. Its start-up sequence uses a dedicated oscillator until VDD reaches ~3.7V, then transitions to PWM regulation governed by feedback voltage (VFB = 1.33V typ), current limit comparator, and max-duty clamp (~90%).
It integrates thermal shutdown at +135°C, low-battery detection with 220mV threshold (LBI) and open-drain LBO output, and separate power (PGND) and signal (SGND) grounds to minimize noise coupling. The internal 220mΩ MOSFET switch supports continuous/discontinuous conduction modes depending on load and inductor selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 1.8V to 13.2V - enables single Li-ion, dual alkaline, or 3–4 NiMH cell operation without external pre-regulation. |
| Output Voltage Range | 4.5V to 17V - configurable via external resistor divider for 5V, 12V, or 15V rail generation in display and telecom applications. |
| Max Output Current | 600mA at 12V out (VIN=3.3V) - sufficient for TFT-LCD gate drivers and DSL line interface ICs. |
| Switching Frequency | Adjustable up to 1.2MHz via RT pin - allows compact magnetics and reduces EMI in dense PCB layouts. |
| Shutdown Current | <1µA - preserves battery life in always-on portable equipment during sleep mode. |
| Feedback Reference | 1.33V ±40mV - sets output accuracy and stability; requires ≤300kΩ divider network to minimize error and noise sensitivity. |
| MOSFET RDS(ON) | 220mΩ at 12V output - limits conduction loss and thermal rise under full load in MSOP package. |
| Operating Temp | –40°C to +85°C - qualified for industrial and telecom environments including DSLAM edge equipment. |
Pinout & Package
EL7515IY is housed in a 10-lead MSOP package (MDP0043), 3.0mm × 4.9mm footprint, 1.1mm maximum height - optimized for ultra-thin portable designs and high-density telecom modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PGND | Power ground return | Connects directly to source of internal MOSFET; must be tied to high-current PCB plane with minimal trace inductance. |
| 2 SGND | Signal ground reference | Reference for FB, SS, EN, LBI, LBO; must connect to PGND at single point only to avoid ground bounce. |
| 3 RT | Oscillator timing input | Resistor-to-ground sets switching frequency (600–1200kHz); value directly determines fSW per datasheet curve. |
| 4 EN | Enable control input | Logic-high (>1.6V) activates regulator; logic-low (<0.5V) forces shutdown with <1µA quiescent draw. |
| 5 LBI | Low-battery sense input | Monitors divided battery voltage; triggers LBO when input falls below 220mV threshold. |
| 6 LBO | Low-battery open-drain output | Sinks 1mA when active; requires external pull-up for system-level battery warning or shutdown signaling. |
| 7 SS | Soft-start control | Capacitor-to-ground controls output ramp rate; prevents inrush current and overshoot during power-up. |
| 8 FB | Voltage feedback input | Compares divided output against 1.33V reference; most noise-sensitive pin - route short and shielded. |
| 9 VDD | Internal circuit supply | Powered from input via internal LDO; max rating 12V; RC filter recommended if VOUT > 10V. |
| 10 LX | Switch node | Drives external inductor; carries high di/dt pulses - keep trace short and wide, away from sensitive analog nodes. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 1.4A MOSFET | Eliminates external high-side switch, reducing BOM count and layout complexity for compact boost converters. |
| Adjustable soft-start | External capacitor on SS pin enables controlled output ramp, preventing overshoot and protecting downstream loads. |
| Low-battery detection | Dedicated LBI/LBO pins provide system-level battery monitoring without MCU intervention or additional comparators. |
| Thermal shutdown | Internal protection at +135°C junction temperature prevents damage during overload or poor heatsinking conditions. |
| Pb-free MSOP package | RoHS-compliant 10-lead MSOP (MDP0043) with matte tin e3 termination - compatible with SnPb and Pb-free reflow profiles. |
Applications
| TFT-LCD Bias Supply | DSL Line Card Power |
|---|---|
Use Scenario: Generating 12V–15V gate drive rails for active-matrix LCD panels in handheld medical displays and industrial HMIs. IC Role / Device Role / Timing Role: Primary step-up regulator converting 3.3V system rail to high-voltage panel bias, operating continuously at ~1MHz to minimize inductor size. Use Value: Delivers 600mA at 92% efficiency in <0.25in² area, enabling thin bezel designs with no external MOSFET or compensation components. | Use Scenario: Providing isolated 12V bias for ADSL/VDLS line interface ICs (e.g., L9673) in customer premises equipment (CPE). IC Role / Device Role / Timing Role: High-efficiency boost converter powering analog front-end circuits, synchronized to system clock via RT pin for EMI management. Use Value: Supports 1.8V–9V input range from wall adapter or PoE-derived rails, with LBO flag enabling graceful line card reset before brownout. |
| Portable Instrumentation | Industrial Sensor Node |
Use Scenario: Powering 5V ADC references and op-amp rails in battery-operated handheld multimeters and data loggers. IC Role / Device Role / Timing Role: Low-quiescent boost regulator maintaining regulated output during deep discharge of dual alkaline cells (2×1.5V). Use Value: <1µA shutdown current extends shelf life; soft-start prevents measurement offset during wake-up from sleep mode. | Use Scenario: Supplying 12V to RS-485 transceivers and analog sensor conditioners in wireless mesh nodes powered by Li-SOCl₂ primary cells. IC Role / Device Role / Timing Role: High-input-impedance boost stage with LBI monitoring cell voltage decay over multi-year deployments. Use Value: 220mV LBI threshold enables accurate end-of-life detection; thermal shutdown protects against enclosure overheating in sealed enclosures. |
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 8A switch current, 2.7V–12V input, integrated compensation - requires different loop design and larger package (20-pin QFN). | Targeted at higher-power USB PD and motor driver apps; lacks LBI/LBO battery monitoring features. | Choose for >1A output or tighter output regulation; avoid if LBO-driven system shutdown is required. |
| MAX17222ETA+ | Lower 0.5A switch current, 0.4V–5.5V input, 1.2MHz fixed frequency - smaller 6-pin WLP package, no LBI/LBO or thermal shutdown. | Optimized for ultra-low-power wearables; not suitable for DSL or LCD bias where >300mA sustained load is needed. | Choose for sub-100mA coin-cell apps; avoid for industrial or telecom use requiring robust fault protection. |
Compared with TPS61088RHLR and MAX17222ETA+, the EL7515IY uniquely balances 600mA capability, integrated battery monitoring, thermal protection, and ultra-low shutdown current in a 10-lead MSOP - making it optimal for space-constrained DSL and portable display systems where reliability and feature integration outweigh raw power density.
Availability
EL7515IY is available at Aetrix Electronics and suitable for DSL line cards, TFT-LCD bias supplies, and portable instrumentation requiring stable component supply across extended product lifecycles.
Supply support for EL7515IY 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 founded in 1967, specializing in high-performance DC/DC converters, precision amplifiers, and interface ICs.
The EL7515IY belongs to Intersil's high-frequency PWM boost regulator product line, designed specifically for compact, efficient voltage boosting in DSL, portable display, and battery-powered industrial equipment where low quiescent current and integrated protection are essential.
FAQ
What is the minimum input voltage required for EL7515IY to start switching?
The EL7515IY begins start-up when VDD reaches approximately 1.7V, and the minimum guaranteed operating input voltage is 1.8V. Below this, the internal oscillator and PWM control do not activate reliably. The EL7515IY supports single Li-ion (2.7–4.2V), dual alkaline (2.0–3.0V), or triple NiMH (3.0–4.2V) configurations - all within its 1.8V–13.2V VIN range. Startup behavior is confirmed in the FN7120 datasheet Figure 9 (Power-Up waveform).
Does EL7515IY support adjustable output voltage, and how is it configured?
Yes, EL7515IY supports fully adjustable output voltage from 4.5V to 17V using an external resistor divider connected to the FB pin. The internal reference is 1.33V ±40mV, so VOUT = 1.33V × (1 + R1/R2). The datasheet recommends keeping the total divider resistance ≤300kΩ to limit bias current error and noise susceptibility. For example, setting R2 = 10kΩ and R1 = 80kΩ yields ~12V output. This configuration is validated in the Typical Application schematic on page 2 of FN7120.
What is the purpose of the LBI and LBO pins on EL7515IY, and how are they used?
The LBI (Low Battery Input) and LBO (Low Battery Output) pins on EL7515IY implement autonomous battery monitoring: LBI accepts a scaled-down battery voltage, and when it falls below 220mV (typ), LBO asserts low as an open-drain signal. This allows direct connection to a microcontroller GPIO or system reset controller without external comparators. In EL7515IY designs, LBI is typically tied to a resistive divider from VIN, and LBO requires a pull-up resistor. This feature is explicitly documented in the Pin Descriptions and Applications Information sections of FN7120 Rev 2.00.
Can EL7515IY operate in discontinuous conduction mode (DCM), and what are the implications?
Yes, EL7515IY operates in either continuous conduction mode (CCM) or discontinuous conduction mode (DCM) depending on load, input/output voltage, and inductor value. At light loads, the inductor current fully decays to zero before the next switching cycle - confirmed in Figure 7 of FN7120. DCM reduces switching losses but increases output ripple and may cause audible noise; the EL7515IY handles both modes inherently without control changes. Inductor selection guidelines (e.g., ≤10µH for 5V output) ensure stable operation across both modes.
Is EL7515IY pin-compatible with other members of the EL75xx family, such as EL7516?
No, EL7515IY is not pin-compatible with EL7516 or other EL75xx variants. The EL7515IY uses a 10-lead MSOP package with specific pin assignments including dedicated LBI/LBO and RT pins, while EL7516 (a step-down regulator) has different functionality, pinout, and package. The datasheet does not state pin compatibility between these devices, and their block diagrams, pin descriptions, and application circuits are fundamentally distinct. Substitution requires full schematic and layout revision.
EL7515IY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-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):
- 1.8V
- Voltage - Input (Max):
- 13.2V
- Voltage - Output (Min/Fixed):
- 4.5V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 1A (Switch)
- Frequency - Switching:
- 670kHz ~ 1.2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
EL7515IY FAQ
1.How can I place an order for EL7515IY through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7515IY 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 EL7515IY reliable?
The price and inventory of EL7515IY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7515IY is usually 5 days.
3.What payment methods are accepted for EL7515IY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7515IY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7515IY?
EL7515IY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7515IY 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 EL7515IY?
For technical support, including EL7515IY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7515IY requirements.
6.How does Aetrix verify that EL7515IY is sourced from the original manufacturer or authorized distributors?
All EL7515IY 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 EL7515IY meets industry standards.
7.What is the process for return or replacement of EL7515IY?
All EL7515IY units undergo pre-shipment inspection (PSI). If there is an issue with EL7515IY, 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 EL7515IY part is unused and in its original packaging.
Return procedure for EL7515IY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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