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Renesas EL7534IY
- Part No.:
- EL7534IY
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
EL7534IY.pdf
- Description:
- IC REG BUCK ADJ 600MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
EL7534IY from Intersil is a synchronous, integrated-FET 600mA step-down DC/DC regulator in a 10-lead MSOP package, operating from 2.5V–5.5V input and delivering adjustable output (0.8V to VIN) with internal compensation, 1.5MHz PWM switching, and 100ms open-drain Power-On-Reset (POR) output. It targets space-constrained Li-Ion-powered portable electronics requiring high efficiency and minimal external components.
For engineers reviewing the EL7534IY datasheet, EL7534IY pinout, EL7534IY application, or EL7534IY equivalent, key selection criteria include its internally compensated voltage-mode control, dual ground separation (PGND/SGND), 70mΩ PMOS + 45mΩ NMOS RDS(ON), <1µA shutdown current, and thermal shutdown at 145°C with 15°C hysteresis.
Technical Context
The EL7534IY implements a fixed-frequency voltage-mode PWM controller with internal compensation, eliminating need for external loop compensation components. Its synchronous rectification uses complementary PMOS (70mΩ) and NMOS (45mΩ) power FETs, enabling 100% duty-cycle operation near VIN and eliminating boot capacitor requirements.
It integrates dedicated signal (SGND) and power (PGND) grounds, a 100ms POR output with active-HI RSI reset trigger, soft-start (650µs), and overcurrent protection set at 1.5A peak. Thermal shutdown activates at 145°C and recovers at 130°C, ensuring robust fault recovery in thermally dense layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 600mA continuous; supports up to 800mA peak without derating on 4-layer board |
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-Ion, 3.3V, and 5V rails |
| Switching Frequency | 1.5MHz typical - enables compact 1.8µH inductor and ceramic capacitors |
| Feedback Reference | 800mV ±10mV - sets output via resistor divider; enables precise 1.2V, 1.8V, 2.5V, 3.3V configurations |
| Shutdown Current | <1µA - preserves battery life in standby mode of portable devices |
| Thermal Protection | 145°C trip / 130°C recovery - provides safe auto-restart after overload or poor heatsinking |
| POR Delay | 100ms nominal - ensures stable power sequencing for microcontrollers and FPGAs |
Pinout & Package
EL7534IY is housed in a 10-lead MSOP package (MDP0043), 3.0mm × 4.9mm × 1.1mm, with fused leads for improved thermal performance (θJA = 100°C/W on 4-layer board). Pin 1 marked with dot; exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SGND | Signal Ground | Reference for control circuitry; must be separated from PGND and joined at single point near IC |
| 2 PGND | Power Ground | Return path for high-current LX switching node; requires large copper pour and vias for thermal relief |
| 3 LX | Switch Node | Drives external inductor; carries high di/dt; must be routed short and wide to minimize EMI |
| 4 VIN | Power Stage Input | Supplies NMOS/PMOS switches; requires local 10µF ceramic cap placed adjacent to PIN 4 and PIN 2 |
| 5 VDD | Controller Supply | Bias supply for internal logic; decoupled via 0.1µF capacitor to SGND |
| 6 RSI | Reset Input | Active-HI asynchronous reset for POR; pulls POR low immediately when asserted |
| 7 EN | Enable Input | Active-HI logic control; enables soft-start and disables all switching with <1µA quiescent draw |
| 8 POR | Open-Drain Reset Output | 100ms delayed low pulse after VO regulation; used as Power-Good signal with external pull-up |
| 9 VO | Output Sense | Direct connection to regulated output; feeds feedback network and load decoupling |
| 10 FB | Voltage Feedback | Monitors resistive divider (R1/R2); 800mV reference enables accurate output programming |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated controller | Eliminates external compensation network; supports stable operation with 10–22µF X5R/X7R ceramic caps |
| Synchronous 70mΩ/45mΩ FETs | Enables >94% peak efficiency and 100% duty cycle near VIN; no boot capacitor required |
| Dual ground architecture (SGND/PGND) | Reduces noise coupling between analog control and high-current power paths; critical for low-noise regulation |
| 100ms POR with RSI reset | Provides deterministic power sequencing for MCUs/FPGAs; RSI allows in-system reset without cycling VIN |
| Thermal shutdown with hysteresis | Auto-recovers at 130°C after 145°C trip; prevents latch-up during transient overloads |
Applications
| Portable Barcode Scanners | Li-Ion–Powered PDAs |
|---|---|
Use Scenario: Compact handheld scanner requiring regulated 3.3V rail from single-cell Li-Ion (2.7–4.2V). IC Role / Device Role / Timing Role: Primary step-down regulator supplying MCU, imager, and interface logic with tight load transient response. Use Value: 1.5MHz switching enables small 1.8µH inductor and 10µF ceramic caps; 600mA output sustains burst imaging without dropout. |
Use Scenario: PDA main power rail generating 1.8V core voltage from 3.3V intermediate bus. IC Role / Device Role / Timing Role: Efficient, low-noise buck converter feeding application processor core with POR-synchronized startup. Use Value: Dual-ground isolation minimizes switching noise on sensitive analog peripherals; 100ms POR ensures clean CPU reset timing. |
| Small Form Factor (SFP) Modules | Portable Test Equipment |
Use Scenario: SFP transceiver module needing 3.3V supply within strict 12.3mm × 10.3mm footprint. IC Role / Device Role / Timing Role: Space-optimized DC/DC regulator delivering stable 3.3V at up to 600mA with minimal BOM count. Use Value: Entire solution occupies <0.15 in² (0.97 cm²); MSOP10 package height ≤1.1mm meets SFP mechanical envelope. |
Use Scenario: Battery-operated handheld multimeter requiring ultra-low quiescent current in sleep mode. IC Role / Device Role / Timing Role: Main system regulator with <1µA shutdown current and fast wake-up via EN pin. Use Value: Extends battery life by minimizing standby drain; soft-start prevents inrush-induced voltage sag on shared Li-Ion rail. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 3MHz switching, 600mA, 2.05V–6.5V input, 0.6V reference, no POR output | Lacks integrated POR and dual-ground separation; higher frequency reduces inductor size but increases EMI sensitivity | Preferred where higher switching frequency and smaller magnetics outweigh need for POR and noise isolation |
| RT8059GJ6 | 1.5MHz, 600mA, 2.5V–5.5V input, 0.6V reference, no RSI/POR, 2.5µA quiescent current | No power-on-reset function; higher shutdown current limits battery runtime in deep-sleep systems | Selected when POR is handled externally and layout simplicity is prioritized over ultra-low IQ |
Compared with TPS62231DRYT and RT8059GJ6, the EL7534IY uniquely combines 100ms POR with RSI reset, dual-ground architecture, and <1µA shutdown-making it optimal for portable systems demanding deterministic power sequencing and maximum battery longevity.
Availability
EL7534IY is available at Aetrix Electronics and suitable for portable barcode scanners, Li-Ion–powered PDAs, and SFP modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7534IY 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 regulators, precision amplifiers, and interface solutions.
The EL7534IY belongs to Intersil's monolithic synchronous buck regulator product line, engineered specifically for space- and power-constrained portable electronics requiring minimal external components and robust thermal behavior.
FAQ
What is the recommended inductor value for EL7534IY?
The EL7534IY is optimized for a 1.8µH inductor, though values from 1.5µH to 2.2µH are acceptable per the datasheet. The inductor must handle ≥1.5A peak current and be rated for 1.5MHz operation. Use shielded power inductors with low DCR to maintain >94% efficiency at 600mA load. The EL7534IY's fixed internal compensation requires adherence to this range to ensure loop stability.
Does EL7534IY support 100% duty cycle operation?
Yes, the EL7534IY supports 100% duty cycle due to its PMOS high-side switch, enabling output voltages approaching VIN minus IR drops. When VIN falls near or below the programmed VOUT, the controller enters 100% mode - maintaining regulation without dropout. This feature is critical for Li-Ion applications where input sags to 2.7V while sustaining 1.8V output.
How is the EL7534IY's Power-On-Reset (POR) output used in system design?
The EL7534IY's POR pin is an open-drain output that stays low for ~100ms after VOUT reaches regulation. With an external pull-up resistor (e.g., 100kΩ to 3.3V), it functions as a Power-Good signal for microcontrollers or FPGAs. Asserting the RSI pin forces immediate POR low, enabling in-system reset without cycling VIN - a key advantage for field-upgradable portable devices using EL7534IY.
What is the thermal performance difference between EL7534IY and standard MSOP10 packages?
The EL7534IY uses a fused-lead MSOP10 package (MDP0043), achieving θJA = 100°C/W on a 4-layer PCB - significantly better than standard MSOP10 (typically ~150°C/W). This allows full 600mA output at +85°C ambient without derating when proper copper area and thermal vias are implemented under PGND and LX pins.
Can EL7534IY operate with only ceramic capacitors?
Yes, the EL7534IY is designed for all-ceramic operation: 10µF–22µF X5R/X7R MLCCs for both input (C1) and output (C2), plus a 0.1µF VDD bypass cap. Its internal compensation eliminates need for electrolytic or tantalum capacitors. Layout best practices - including short traces from VIN/PGND to C1 and from VO/PGND to C2 - are essential to maintain stability and minimize EMI.
EL7534IY 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-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
EL7534IY FAQ
1.How can I place an order for EL7534IY through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7534IY 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 EL7534IY reliable?
The price and inventory of EL7534IY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7534IY is usually 5 days.
3.What payment methods are accepted for EL7534IY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7534IY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7534IY?
EL7534IY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7534IY 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 EL7534IY?
For technical support, including EL7534IY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7534IY requirements.
6.How does Aetrix verify that EL7534IY is sourced from the original manufacturer or authorized distributors?
All EL7534IY 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 EL7534IY meets industry standards.
7.What is the process for return or replacement of EL7534IY?
All EL7534IY units undergo pre-shipment inspection (PSI). If there is an issue with EL7534IY, 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 EL7534IY part is unused and in its original packaging.
Return procedure for EL7534IY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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