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Renesas EL7536IY-T13
- Part No.:
- EL7536IY-T13
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
EL7536IY-T13.pdf
- Description:
- IC REG BUCK ADJ 1A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,121
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Product details
Overview
EL7536IY-T13 from Intersil is a synchronous, integrated-FET 1A step-down DC/DC regulator in MSOP-10 package, operating from 2.5V to 5.5V input and delivering adjustable output (0.8V–VIN) with internal compensation. It delivers up to 94% efficiency at 1.8V/1A, features 1.4MHz PWM switching, <1µA shutdown current, and integrated 100ms POR output - used in Li-ion–powered portable electronics requiring compact, one-side PCB layout.
For engineers reviewing the EL7536IY-T13 datasheet, EL7536IY-T13 pinout, EL7536IY-T13 application, or EL7536IY-T13 equivalent, key selection criteria include its internally compensated voltage-mode control, dual ground separation (SGND/PGND), thermal shutdown threshold (145°C), RDS(ON) values (70mΩ PMOS / 45mΩ NMOS), and compatibility with 1.8µH inductors and 10µF ceramic capacitors.
Technical Context
The EL7536IY-T13 implements a fixed-frequency voltage-mode PWM controller with internal compensation, eliminating external loop components. Its synchronous topology uses an integrated PMOS high-side switch and NMOS low-side switch, enabling 100% duty-cycle operation near VIN and removing the need for a bootstrap capacitor.
It integrates dedicated signal (SGND) and power (PGND) grounds, a 100ms open-drain POR output triggered by FB voltage crossing 95% of target, and logic-level EN/RSI inputs with hysteresis (2.4V rising / 0.8V falling). Thermal protection activates at 145°C with 15°C hysteresis, and current limiting trips at 1.5A peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - supports single-cell Li-ion, 3.3V, and 5V rails without external LDO pre-regulation. |
| Output Current | 1A continuous - sufficient for core logic or I/O rails in portable devices like barcode readers and SFP modules. |
| Switching Frequency | 1.4MHz typical - enables use of small 1.8µH inductors and reduces output ripple without compromising EMI filtering size. |
| Feedback Voltage | 800mV ±10mV - sets output via resistor divider; enables precise 1.2V, 1.8V, 2.5V, or 3.3V generation with standard 1% resistors. |
| Shutdown Current | <1µA - preserves battery life in standby mode for handheld PDAs and cellular phones. |
| Thermal Shutdown | 145°C activation / 130°C recovery - provides self-resetting protection during sustained overload or poor heatsinking. |
| Efficiency | Up to 94% at 1.8V/1A - minimizes power loss and thermal load in space-constrained 0.97cm² layouts. |
Pinout & Package
EL7536IY-T13 is housed in a 10-lead MSOP package (MDP0043), 3.0mm × 4.9mm × 1.1mm, RoHS-compliant with matte tin terminations. The fused-lead construction achieves θJA = 115°C/W on high-thermal-conductivity boards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SGND) | Signal Ground | Reference for control circuitry (FB, EN, RSI, POR); must be separated from PGND and joined at single point near IC. |
| 2 (PGND) | Power Ground | Return path for high-current LX switching node and input/output capacitors; requires large copper pour and vias. |
| 3 (LX) | Switch Node | Drives external inductor; carries high di/dt; must be routed short and wide to minimize ringing and EMI. |
| 4 (VIN) | Power Stage Input | Supplies NMOS/PMOS switches; requires local 10µF ceramic capacitor placed adjacent to VIN and PGND pins. |
| 5 (VDD) | Controller Supply | Bias supply for internal logic and reference; decoupled internally but benefits from shared input cap with VIN. |
| 6 (RSI) | Reset Input | Active-HI asynchronous reset for POR timer; pulling low forces immediate POR assertion for system-level reset coordination. |
| 7 (EN) | Enable Input | Logic-level enable with hysteresis (2.4V/0.8V thresholds); ties high to VIN for automatic startup above 2.4V. |
| 8 (POR) | Power-On Reset Output | Open-drain output held low for 100ms after regulated output reaches 95% of target; requires external pull-up for Power-Good signaling. |
| 9 (VO) | Output Sense | Direct connection to regulated output node; used for remote sensing in noisy environments or long traces. |
| 10 (FB) | Voltage Feedback Input | High-impedance input (250nA bias) monitoring resistor divider; determines output voltage as VO = 0.8V × (1 + R1/R2). |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated controller | Eliminates external compensation network - reduces BOM count and layout sensitivity while maintaining stability with 10–22µF ceramic caps. |
| Synchronous MOSFET integration | 70mΩ PMOS + 45mΩ NMOS switches - enables high efficiency and 100% duty cycle without boot capacitor. |
| Dual ground separation (SGND/PGND) | Prevents noise coupling from power switching into feedback and control paths - critical for stable regulation under dynamic load. |
| 100ms POR with RSI override | Provides deterministic system reset timing and allows software-triggered resets independent of power rail sequencing. |
| Thermal and overcurrent protection | Auto-recovering shutdown at 145°C and 1.5A peak limit - protects against sustained overload without external circuitry. |
Applications
| PDA and Pocket PC Computers | Bar Code Readers |
|---|---|
Use Scenario: Powering ARM-based application processors and memory interfaces in handheld computing devices with tight board area constraints. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V core voltage regulator delivering 1A with soft-start and POR for controlled boot sequence. Use Value: 0.97cm² total solution size and <1µA shutdown current extend battery runtime and simplify mechanical design. | Use Scenario: Supplying image sensor, laser driver, and microcontroller in battery-operated handheld scanners. IC Role / Device Role / Timing Role: Adjustable-output buck converter generating 3.3V I/O rail and 1.8V logic rail from single Li-ion cell. Use Value: 2.5V–5.5V input range accommodates full Li-ion discharge curve; 1.4MHz switching avoids audible noise in scanning audio feedback. |
| Cellular Phones | Small Form Factor (SFP) Modules |
Use Scenario: Providing clean, sequenced power to baseband and RF subsystems in legacy 2G/3G handsets. IC Role / Device Role / Timing Role: Secondary regulator deriving 2.8V analog supply from main 3.3V rail, with POR synchronized to system reset. Use Value: Integrated POR eliminates discrete reset IC; dual-ground architecture ensures low-noise analog performance. | Use Scenario: Generating 3.3V transceiver supply in hot-pluggable optical communication modules with strict height limits. IC Role / Device Role / Timing Role: Compact, one-side-only DC/DC solution meeting SFP MSA mechanical envelope (max 1.1mm height). Use Value: MSOP-10 footprint and 1.1mm profile satisfy SFP module Z-height requirements while delivering full 1A capability. |
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 | Successor product with identical pinout, improved efficiency (up to 96%), lower RDS(ON) (55mΩ/35mΩ), and extended -40°C to +105°C temp range. | Supports higher ambient temperatures in industrial or automotive accessory designs where EL7536IY-T13 is limited to +85°C. | Select ISL97536 for new designs requiring longer lifecycle support, higher efficiency, or extended temperature operation. |
| TPS62231DRYT | 1.8V fixed-output variant (no FB pin), 1.8MHz switching, 2.05V–6.5V input, 0.95µA shutdown, but lacks POR and dual-ground isolation. | Targets cost-sensitive, fixed-voltage applications where reset signaling and noise-sensitive analog rails are not required. | Choose TPS62231DRYT only when output voltage is fixed at 1.8V and POR functionality is unnecessary. |
Compared with EL7536IY-T13, ISL97536 offers higher thermal rating and efficiency in pin-compatible form, while TPS62231DRYT trades flexibility and protection features for lower cost and simpler layout in fixed-output use cases.
Availability
EL7536IY-T13 is available at Aetrix Electronics and suitable for PDA power management, barcode reader subsystems, and SFP module designs requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for EL7536IY-T13 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, designs high-performance analog and power management ICs for industrial, communications, and consumer markets.
The EL7536 product line targets space-constrained portable electronics needing highly integrated, thermally robust DC/DC conversion with minimal external components and built-in system-level functions like POR.
FAQ
What is the recommended inductor value for EL7536IY-T13 in a typical 1.8V/1A application?
The EL7536IY-T13 datasheet specifies a nominal inductor value of 1.8µH, with acceptable range from 1.5µH to 2.2µH. For a 1.8V/1A application at 3.3V input, 1.8µH ensures optimal ripple current (~300mA peak-to-peak), efficiency (>92%), and stability with the internal compensation. Larger values reduce ripple but increase size and transient response time; smaller values raise ripple and may challenge thermal limits under full load.
Does EL7536IY-T13 support 100% duty cycle operation, and what is its practical impact?
Yes, EL7536IY-T13 supports 100% duty cycle via its PMOS high-side switch, enabling output voltages approaching VIN (e.g., 3.2V out from 3.3V in). This occurs when VIN drops near VO, and the PFET remains fully on. During this mode, output ripple increases slightly due to random off-time; adding extra output capacitance (e.g., 22µF) mitigates this. The EL7536IY-T13's 70mΩ PMOS RDS(ON) defines the minimum dropout voltage under load.
How is the Power-On Reset (POR) function implemented in EL7536IY-T13, and can it be disabled?
The EL7536IY-T13 monitors FB voltage and asserts its open-drain POR pin low for 100ms once FB rises to 95% of target. RSI can force immediate POR assertion. To disable POR, tie RSI to GND and leave POR unconnected (no pull-up). If POR is unused, omit R4; if used as Power-Good, install R4 (100kΩ) between POR and VDD. The EL7536IY-T13 does not offer POR disable via register or pin strap.
What are the PCB layout requirements specific to EL7536IY-T13's dual-ground architecture?
EL7536IY-T13 requires strict separation of SGND (pins 1, 10) and PGND (pin 2): route them as isolated copper islands, joined only at a single point near the IC's PGND pin. Place input capacitor between VIN and PGND with minimal loop area; keep LX trace short and wide; route FB sense traces away from noisy nodes; and add multiple thermal vias under PGND and LX pads. These practices prevent ground bounce from corrupting feedback and ensure EL7536IY-T13 stability.
Is EL7536IY-T13 RoHS compliant, and what does "Pb-free plus anneal" mean for assembly?
Yes, EL7536IY-T13 is RoHS compliant under Intersil's "Pb-free plus anneal" standard: 100% matte tin termination with annealing to prevent tin whisker growth, compatible with both SnPb and lead-free reflow profiles. Its MDP0043 MSOP-10 package meets IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for Pb-free peak reflow (260°C). No special assembly process is needed beyond standard Pb-free handling.
EL7536IY-T13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 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
EL7536IY-T13 FAQ
1.How can I place an order for EL7536IY-T13 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7536IY-T13 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 EL7536IY-T13 reliable?
The price and inventory of EL7536IY-T13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7536IY-T13 is usually 5 days.
3.What payment methods are accepted for EL7536IY-T13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7536IY-T13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7536IY-T13?
EL7536IY-T13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7536IY-T13 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 EL7536IY-T13?
For technical support, including EL7536IY-T13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7536IY-T13 requirements.
6.How does Aetrix verify that EL7536IY-T13 is sourced from the original manufacturer or authorized distributors?
All EL7536IY-T13 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 EL7536IY-T13 meets industry standards.
7.What is the process for return or replacement of EL7536IY-T13?
All EL7536IY-T13 units undergo pre-shipment inspection (PSI). If there is an issue with EL7536IY-T13, 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 EL7536IY-T13 part is unused and in its original packaging.
Return procedure for EL7536IY-T13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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