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Renesas EL7535IYZ-T13
- Part No.:
- EL7535IYZ-T13
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
EL7535IYZ-T13.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,930
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Product details
Overview
EL7535IYZ-T13 from Intersil is a synchronous 350mA step-down DC/DC regulator with integrated PMOS/NMOS FETs, internally compensated voltage-mode PWM control, 1.4MHz switching frequency, and operation from 2.5V to 6V input-designed for Li-ion, 3.3V, or 5V-powered portable electronics requiring compact, high-efficiency power conversion.
For engineers reviewing the EL7535IYZ-T13 datasheet, EL7535IYZ-T13 pinout, EL7535IYZ-T13 application, or EL7535IYZ-T13 equivalent, key selection criteria include its 10-lead MSOP package with separate PGND/SGND pins, 0.8V–VIN adjustable output via resistor divider, <1µA shutdown current, and integrated POR open-drain output with 100ms delay.
Technical Context
The EL7535IYZ-T13 implements a fixed-frequency voltage-mode PWM controller with internal compensation, eliminating external compensation components. Its synchronous rectification uses integrated 70mΩ PMOS and 45mΩ NMOS FETs, enabling up to 94% efficiency at 350mA load with 1.8µH inductor and ceramic capacitors.
It features dual ground separation (PGND for power stage, SGND for control), dedicated RSI input for POR reset assertion, and thermal shutdown at +145°C with +15°C hysteresis. The POR output provides a 100ms delayed active-low signal referenced to VO reaching regulation, usable as Power-Good indication when pulled up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 350mA continuous; supports peak 500mA for transient loads without derating |
| Input Voltage Range | 2.5V to 6V; compatible with single Li-ion (2.7–4.2V), 3.3V, and 5V rails |
| Switching Frequency | 1.4MHz typical; enables use of small 1.8µH inductors and 10µF ceramic capacitors |
| Feedback Voltage | 800mV ±20mV; sets output via resistor divider: VO = 0.8V × (1 + R1/R2) |
| Shutdown Current | <1µA; enables ultra-low-power battery hold-up during system sleep modes |
| Thermal Protection | Shuts down at +145°C junction; restarts at +130°C; prevents damage under sustained overload |
| POR Delay | 100ms after VO reaches regulation; provides reliable system reset timing for microcontrollers |
Pinout & Package
EL7535IYZ-T13 is housed in a Pb-free, RoHS-compliant 10-lead MSOP package (MDP0043) with 0.5mm pitch, 3.0mm × 4.9mm footprint, and max height of 1.1mm-optimized for space-constrained portable designs.
| 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 switch node and inductor; requires large copper pour for thermal management |
| 3 LX | Switch Node | Drives external inductor; carries high di/dt; must minimize trace length and loop area |
| 4 VIN | Power Stage Input | Supplies NMOS/PMOS switches; requires local 10µF ceramic capacitor placed adjacent to pin |
| 5 VDD | Controller Supply | Bias supply for internal logic and reference; decoupled separately from VIN |
| 6 RSI | Reset Input | Active-HI asynchronous input that forces POR low immediately; used for manual reset or brown-out recovery |
| 7 EN | Enable | Active-HI logic input; rising threshold 2.4V, hysteresis 100–300mV; controls full regulator startup/shutdown |
| 8 POR | Power-On Reset Output | Open-drain output; pulls low for 100ms after VO regulates; requires external pull-up for Power-Good function |
| 9 VO | Output Sense | Direct connection to regulated output rail; used for remote sensing if needed |
| 10 FB | Voltage Feedback | Connects to mid-point of R1/R2 divider; 800mV reference sets output voltage |
Key Features
| Feature | Design Value |
|---|---|
| Internally Compensated Control | Eliminates external compensation network-only two 10µF ceramics and one 1.8µH inductor required for full design |
| Synchronous FET Integration | 70mΩ PMOS + 45mΩ NMOS reduce conduction loss and enable >94% peak efficiency at 350mA |
| Dual Ground Architecture | Separate PGND/SGND pins prevent noise coupling from power switching into sensitive analog control circuits |
| Programmable POR Function | 100ms delay with RSI-triggered reset enables robust system-level power sequencing and fault recovery |
| Ultra-Low Shutdown Current | <1µA quiescent draw extends battery life in always-on or standby applications |
Applications
| Bar Code Readers | Portable Test Equipment |
|---|---|
Use Scenario: Handheld scanners requiring stable 1.8V or 3.3V rail from single Li-ion cell with minimal board area. IC Role / Device Role / Timing Role: Primary step-down regulator delivering regulated core voltage to image sensor and MCU. Use Value: 10-lead MSOP footprint and five-component solution enable sub-1cm² power stage layout while maintaining 92% efficiency at 200mA. | Use Scenario: Battery-powered multimeters and signal analyzers needing clean, low-noise 2.5V reference supply. IC Role / Device Role / Timing Role: Low-ripple DC/DC converter powering precision ADC and analog front-end. Use Value: Internally compensated design avoids EMI-sensitive external compensation parts; soft-start prevents inrush-induced measurement offset. |
| Cellular Phones | SFP Modules |
Use Scenario: Feature phone baseband subsystems powered by 3.7V Li-ion battery requiring 1.2V core and 2.8V I/O rails. IC Role / Device Role / Timing Role: Secondary buck regulator generating processor core voltage with tight load-transient response. Use Value: 1.4MHz switching allows fast transient recovery (<10µs) and reduces output capacitance requirements to 10µF ceramic. | Use Scenario: Small Form Factor pluggable optical transceivers needing isolated 3.3V supply from host 5V bus in <10mm width. IC Role / Device Role / Timing Role: Compact, thermally efficient step-down converter mounted directly on SFP PCB edge. Use Value: Fused-lead MSOP package achieves θJA = 100°C/W on 4-layer board-critical for convection-cooled pluggable modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL80019 | 300mA rated, 2.7–5.5V input, 3MHz switching, no integrated POR | Lacks RSI/POR functionality; requires external reset IC for sequencing | Preferred where higher frequency and smaller inductors are prioritized over integrated reset |
| ISL80019A | Same specs as ISL80019 but with improved thermal resistance and tighter VFB tolerance (±0.5%) | Still lacks POR/RSI; better for precision output stability but no power-good signaling | Choose when output accuracy and thermal performance outweigh need for integrated reset |
Compared with EL7535IYZ-T13, both ISL80019 and ISL80019A offer higher switching frequency and tighter feedback tolerance but omit the critical POR/RSI interface-requiring additional components for reliable power sequencing in portable systems.
Availability
EL7535IYZ-T13 is available at Aetrix Electronics and suitable for bar code readers, portable test equipment, and SFP modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7535IYZ-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 is a leading provider of power management and precision analog solutions, serving industrial, infrastructure, mobile computing, and high-end consumer markets.
The EL7535IYZ-T13 belongs to Intersil's monolithic DC/DC regulator product line, engineered specifically for space-constrained, battery-powered portable electronics demanding high efficiency, low quiescent current, and integrated power sequencing functions.
FAQ
What is the maximum output current capability of the EL7535IYZ-T13?
The EL7535IYZ-T13 delivers 350mA continuously under specified thermal conditions (θJA = 100°C/W on 4-layer board). It supports 500mA peak current for short-duration transients and features overcurrent protection that limits internal FET conduction at ~1.5A to prevent damage during sustained overload or short-circuit events.
Does the EL7535IYZ-T13 require external compensation components?
No, the EL7535IYZ-T13 uses an internally compensated voltage-mode PWM controller. This eliminates the need for external compensation networks-only two 10µF ceramic capacitors and one 1.8µH inductor are required to implement a complete, space-efficient DC/DC converter, reducing BOM count and layout complexity.
How does the POR function operate on the EL7535IYZ-T13?
The EL7535IYZ-T13 POR pin is an open-drain output that goes low for 100ms after the output voltage VO reaches regulation. When the RSI pin is asserted high, POR immediately goes low and holds for 100ms after RSI returns low-enabling precise system reset timing. An external pull-up resistor is required to generate a valid Power-Good signal.
What is the purpose of separate SGND and PGND pins on the EL7535IYZ-T13?
The EL7535IYZ-T13 separates Signal Ground (SGND) and Power Ground (PGND) to isolate noise-sensitive control circuitry from high-di/dt power switching currents. SGND serves the error amplifier and reference; PGND carries inductor return current. They must connect at a single point near the IC to prevent ground bounce and ensure stable regulation.
Can the EL7535IYZ-T13 be used with a 2.5V input supply?
Yes, the EL7535IYZ-T13 operates across 2.5V to 6V input range. At 2.5V input, it can deliver regulated outputs down to 0.8V (e.g., 0.8V, 1.2V, 1.8V) using the FB resistor divider. Startup occurs when VIN rises above ~2.42V, ensuring reliable turn-on from fully charged Li-ion cells or low-voltage logic rails.
EL7535IYZ-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):
- 6V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 350mA
- Frequency - Switching:
- 1.4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
EL7535IYZ-T13 FAQ
1.How can I place an order for EL7535IYZ-T13 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7535IYZ-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 EL7535IYZ-T13 reliable?
The price and inventory of EL7535IYZ-T13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7535IYZ-T13 is usually 5 days.
3.What payment methods are accepted for EL7535IYZ-T13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7535IYZ-T13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7535IYZ-T13?
EL7535IYZ-T13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7535IYZ-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 EL7535IYZ-T13?
For technical support, including EL7535IYZ-T13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7535IYZ-T13 requirements.
6.How does Aetrix verify that EL7535IYZ-T13 is sourced from the original manufacturer or authorized distributors?
All EL7535IYZ-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 EL7535IYZ-T13 meets industry standards.
7.What is the process for return or replacement of EL7535IYZ-T13?
All EL7535IYZ-T13 units undergo pre-shipment inspection (PSI). If there is an issue with EL7535IYZ-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 EL7535IYZ-T13 part is unused and in its original packaging.
Return procedure for EL7535IYZ-T13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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