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Renesas EL7536IYZ
- Part No.:
- EL7536IYZ
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
EL7536IYZ.pdf
- Description:
- IC REG BUCK ADJ 1A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,806
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Product details
Overview
EL7536IYZ from Intersil is a synchronous, integrated-FET 1A step-down DC/DC regulator in a Pb-free 10-lead MSOP package. It operates from 2.5V to 5.5V input, delivers adjustable output from 0.8V to VIN via external resistor divider, and features 1.4MHz PWM switching, internal compensation, 100ms POR output, and <1µA shutdown current - used in Li-ion–powered portable electronics requiring compact, efficient power conversion.
For engineers reviewing the EL7536IYZ datasheet, EL7536IYZ pinout, EL7536IYZ application, or EL7536IYZ equivalent, key selection criteria include its internally compensated voltage-mode control architecture, dual ground separation (SGND/PGND), 1.4MHz fixed-frequency operation, thermal shutdown at 145°C, and compatibility with single-sided PCB layouts under 0.15in² footprint.
Technical Context
The EL7536IYZ implements a voltage-mode PWM controller with fixed 1.4MHz oscillator and internal compensation network, eliminating need for external loop compensation components. Its synchronous topology integrates PMOS (70mΩ typical) and NMOS (45mΩ typical) power FETs, enabling 100% duty-cycle operation near VIN and eliminating boot capacitor requirements.
It features dual ground domains (SGND for control logic, PGND for high-current power stage), a dedicated open-drain POR output with 100ms delay, and RSI pin for asynchronous reset injection. Protection includes cycle-by-cycle current limiting (1.5A), overtemperature shutdown (145°C trip, 130°C hysteresis), and short-circuit foldback behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports 3.3V/5V rails and single-cell Li-ion (2.7–4.2V) without external LDO pre-regulation. |
| Output Current | 1A continuous - sustained at full load across -40°C to +85°C ambient with proper thermal layout on 4-layer board. |
| Switching Frequency | 1.4MHz typical - enables use of small 1.8µH inductor and 10µF ceramic capacitors, minimizing solution size. |
| Feedback Reference | 800mV ±10mV - sets output voltage via external resistor divider; enables precise 1.2V, 1.8V, 2.5V, 3.3V configurations. |
| Shutdown Current | <1µA - allows battery-powered systems to achieve ultra-low standby power during deep sleep modes. |
| POR Delay | 100ms nominal - provides deterministic system reset timing after output regulation is achieved. |
| Thermal Shutdown | 145°C junction trip with 15°C hysteresis - protects against sustained overload or poor heatsinking without external sensor. |
Pinout & Package
EL7536IYZ is housed in a RoHS-compliant, Pb-free 10-lead MSOP package (MDP0043), 3.0mm × 4.9mm × 1.1mm profile, with fused-lead construction yielding θJA = 100°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SGND | Signal Ground | Reference return for control circuitry; must be separated from PGND and joined at single point near IC. |
| 2 PGND | Power Ground | High-current return path for LX and VIN; requires large copper pour and multiple vias for thermal/EMI performance. |
| 3 LX | Switch Node | Drives external inductor; carries high di/dt square wave - trace must be short, wide, and avoid sensitive analog routing. |
| 4 VIN | Power Input | Supplies power stage (PMOS/NMOS); requires low-ESR 10µF ceramic cap placed adjacent to PIN 4 and PIN 2. |
| 5 VDD | Controller Supply | Bias supply for internal logic; decoupled internally but benefits from local 0.1µF cap to SGND. |
| 6 RSI | Reset Input | Active-HI asynchronous reset for POR; pulling low forces immediate POR assertion and 100ms re-timing. |
| 7 EN | Enable Input | Active-HI logic control; threshold 2.4V (rising), 0.8V (falling); <1µA leakage in shutdown state. |
| 8 POR | Power-On Reset Output | Open-drain output; pulled low for 100ms after VO reaches target; requires external pull-up for Power-Good signaling. |
| 9 VO | Output Sense | Direct connection to regulated output node; used for remote sensing if trace resistance is significant. |
| 10 FB | Feedback Input | Connects to resistor divider midpoint; 800mV reference sets VO = 0.8V × (1 + R1/R2); high-impedance (250nA). |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated controller | Eliminates need for external compensation network - reduces BOM count and design iteration time for stable 1A operation. |
| Synchronous MOSFET integration | 70mΩ PMOS + 45mΩ NMOS switches enable >94% peak efficiency and eliminate external bootstrap circuitry. |
| 100ms POR with RSI override | Provides deterministic system-level reset timing and field-serviceable reset injection without firmware involvement. |
| Dual ground separation (SGND/PGND) | Minimizes noise coupling between power-switching transients and feedback/control circuitry for stable regulation. |
| 100% duty-cycle capability | Allows VO to approach VIN (e.g., 4.2V → 3.9V under light load), critical for Li-ion battery applications near end-of-discharge. |
Applications
| Portable Barcode Scanners | Li-ion–Powered PDAs |
|---|---|
|
Use Scenario: Compact handheld scanner operating from single-cell Li-ion battery (2.7–4.2V) powering CMOS image sensor and Bluetooth radio. IC Role / Device Role / Timing Role: Primary 1.8V/1A step-down regulator supplying image sensor core and interface logic; POR ensures clean initialization before sensor startup. Use Value: 1.4MHz switching enables tiny 1.8µH inductor and 0.15in² total footprint - essential for ergonomic form factor and battery life extension. |
Use Scenario: Pocket PC requiring stable 3.3V rail for CPU I/O and 1.2V for core logic, powered by removable Li-ion pack. IC Role / Device Role / Timing Role: Dual-output capable via resistor reconfiguration; EN pin synchronized to system suspend/resume; POR coordinates bootloader readiness. Use Value: Internal compensation and fixed frequency simplify layout validation; <1µA shutdown current extends standby time beyond 72 hours. |
| Small Form Factor (SFP) Modules | Portable Test Equipment |
|
Use Scenario: Hot-pluggable SFP transceiver module drawing up to 1A at 3.3V from host board's 5V or 3.3V supply rail. IC Role / Device Role / Timing Role: Local point-of-load regulator; RSI pin used for hot-insertion detection and POR retriggering during plug-in event. Use Value: MSOP10 package fits within tight SFP mechanical envelope; 100°C/W θJA enables full 1A operation without airflow in sealed modules. |
Use Scenario: Battery-operated handheld oscilloscope or DMM requiring low-noise 2.5V ADC reference and 1.8V FPGA core supply. IC Role / Device Role / Timing Role: Primary regulator for mixed-signal subsystem; separate SGND/PGND routing prevents digital switching noise from corrupting analog measurements. Use Value: 800mV precision feedback reference and <1% load regulation ensure stable reference voltage across 0–1A load range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL97536 | Pin-compatible successor with improved efficiency (95% typ), lower RDS(ON) (PMOS 55mΩ, NMOS 35mΩ), and extended temp range (–40°C to +105°C). | Supports higher ambient environments (e.g., industrial enclosures); same MSOP10 footprint and resistor-divider interface. | Select ISL97536 for new designs requiring longer product lifecycle support and margin for thermal derating. |
| TPS62231DRYR | 1.8V fixed-output variant (non-adjustable), 2.05MHz switching, 0.95µA shutdown, but lacks POR and RSI functions. | Reduces BOM count where fixed 1.8V output suffices and system-level reset is handled elsewhere. | Choose TPS62231DRYR only when POR/RSI functionality is unnecessary and fixed output simplifies qualification. |
Compared with EL7536IYZ, ISL97536 offers higher reliability in elevated temperature environments and tighter parametric control, while TPS62231DRYR trades feature richness for ultra-low quiescent current and fixed-output simplicity - neither is pin-compatible without validation, and both require review of enable threshold, thermal response, and layout constraints.
Availability
EL7536IYZ is available at Aetrix Electronics and suitable for portable medical monitors, handheld industrial scanners, and Li-ion–powered test instrumentation requiring stable component supply, long-term obsolescence management, and RoHS-compliant packaging.
Supply support for EL7536IYZ 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 designer known for high-performance DC/DC regulators, precision amplifiers, and interface ICs.
The EL7536IYZ belongs to Intersil's monolithic synchronous buck regulator product line, engineered specifically for space-constrained, battery-powered portable electronics demanding high efficiency, minimal external components, and robust protection features.
FAQ
What is the maximum output voltage achievable with EL7536IYZ?
The EL7536IYZ supports output voltages from 0.8V up to VIN using an external resistor divider. At light loads and high input voltage, it achieves ~98% of VIN due to 100% duty-cycle capability enabled by its integrated PMOS high-side switch. For example, with VIN = 4.2V (fully charged Li-ion), EL7536IYZ can deliver up to ~4.1V - limited only by PMOS RDS(ON) and inductor DCR drop per the formula VO = VIN – IO × (RDSON1 + RL).
Does EL7536IYZ require external compensation components?
No, EL7536IYZ features an internally compensated voltage-mode PWM controller. This eliminates the need for external Type-II or Type-III compensation networks, reducing component count and layout sensitivity. Designers only need to select standard 10µF ceramic input/output capacitors and a 1.8µH inductor - all specified in the datasheet for guaranteed stability across operating conditions.
How does the RSI pin function on EL7536IYZ?
The RSI (Reset Input) pin on EL7536IYZ is an active-HI asynchronous control that forces the POR output low immediately upon assertion, then holds it low for a full 100ms after RSI returns low. This allows external microcontrollers or system supervisors to inject a hardware reset independent of power sequencing - critical for field-upgrade scenarios or fault recovery in portable equipment using EL7536IYZ.
What thermal performance can be expected from EL7536IYZ in a real PCB layout?
EL7536IYZ uses a fused-lead MSOP10 package achieving θJA = 100°C/W on a 4-layer board with adequate copper pour and thermal vias under PGND. At 1A load and 5V input, typical power dissipation is ~350mW; this results in ~35°C junction rise above ambient - well within the -40°C to +85°C operating range. Layout adherence to Intersil's guidelines (separate grounds, short LX trace, localized input cap) is essential to maintain this performance.
Is EL7536IYZ still recommended for new designs?
No - the datasheet explicitly marks EL7536IYZ as "NOT RECOMMENDED FOR NEW DESIGNS" and identifies ISL97536 as the possible substitute product. While EL7536IYZ remains available and fully functional, new designs should evaluate ISL97536 for improved specs, extended temperature rating, and ongoing manufacturing support. Aetrix Electronics maintains legacy supply for EL7536IYZ to support existing production and repair programs.
EL7536IYZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 1A
- 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
EL7536IYZ FAQ
1.How can I place an order for EL7536IYZ through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7536IYZ 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 EL7536IYZ reliable?
The price and inventory of EL7536IYZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7536IYZ is usually 5 days.
3.What payment methods are accepted for EL7536IYZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7536IYZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7536IYZ?
EL7536IYZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7536IYZ 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 EL7536IYZ?
For technical support, including EL7536IYZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7536IYZ requirements.
6.How does Aetrix verify that EL7536IYZ is sourced from the original manufacturer or authorized distributors?
All EL7536IYZ 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 EL7536IYZ meets industry standards.
7.What is the process for return or replacement of EL7536IYZ?
All EL7536IYZ units undergo pre-shipment inspection (PSI). If there is an issue with EL7536IYZ, 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 EL7536IYZ part is unused and in its original packaging.
Return procedure for EL7536IYZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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