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Renesas EL7535IYZ-T7
- Part No.:
- EL7535IYZ-T7
- Manufacturer:
- Renesas
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
EL7535IYZ-T7.pdf
- Description:
- IC REG BUCK ADJ 350MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
EL7535IYZ-T7 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 rail conversion to adjustable 0.8V–VIN outputs in space-constrained portable electronics.
For engineers reviewing the EL7535IYZ-T7 datasheet, EL7535IYZ-T7 pinout, EL7535IYZ-T7 application, or EL7535IYZ-T7 equivalent, this part delivers high-efficiency (up to 94%) power conversion in a 10-lead MSOP package with <1µA shutdown current, POR output, soft-start, and overtemperature/overcurrent protection-key for battery-powered PDA, barcode reader, and SFP module designs.
Technical Context
The EL7535IYZ-T7 implements a fixed-frequency voltage-mode PWM controller with internal compensation, eliminating external compensation components. Its dual-MOSFET synchronous rectification enables high efficiency across load ranges while maintaining stable regulation under dynamic load transients.
It integrates dedicated SGND and PGND pins for noise isolation between control and power stages, supports external output voltage setting via resistive divider on FB/VO pins, and provides an open-drain POR signal with 100ms delay and RSI-triggered reset capability-enabling system-level power sequencing and fault recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 350mA continuous; supports peak 500mA for short durations without derating |
| Input Voltage Range | 2.5V to 6V; compatible with single-cell 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 with precise regulation point |
| Shutdown Current | <1µA; minimizes battery drain in standby mode of portable devices |
| Thermal Shutdown | 145°C trip with 15°C hysteresis; protects against sustained overload or poor PCB thermal design |
| Efficiency | Up to 94% at 1.8V/350mA from 3.3V input; reduces heat generation in sealed enclosures |
Pinout & Package
EL7535IYZ-T7 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 ultra-thin portable applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SGND) | Signal Ground | Reference for control circuitry; must be isolated from PGND except at single-point connection |
| 2 (PGND) | Power Ground | Return path for high-current LX switching node; requires large copper pour for thermal management |
| 3 (LX) | Switch Node | Drives external inductor; carries high di/dt current-requires short, low-inductance trace |
| 4 (VIN) | Power Input | Supplies power stage; accepts 2.5–6V; must be decoupled near PGND with 10µF ceramic capacitor |
| 5 (VDD) | Controller Supply | Bias supply for internal logic; derived from VIN but regulated internally |
| 6 (RSI) | Reset Input | Active-HI asynchronous reset for POR timer; pulls POR low immediately when asserted |
| 7 (EN) | Enable Input | Logic-level enable; rising threshold ~2.4V; shuts down regulator with <1µA quiescent current |
| 8 (POR) | Power-On Reset Output | Open-drain output held low for 100ms after output reaches regulation; serves as Power-Good signal |
| 9 (VO) | Output Sense | Direct connection to regulated output; used with FB to sense output voltage |
| 10 (FB) | Feedback Input | Connects to resistor divider between VO and SGND; sets output per VOUT = 0.8V × (1 + R1/R2) |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous FET Integration | Integrated 70mΩ PMOS and 45mΩ NMOS switches eliminate external MOSFETs and reduce BOM count |
| Internal Compensation | Fixed compensation network allows full converter design with only two 10µF ceramics and one 1.8µH inductor |
| Power-On Reset (POR) | 100ms delayed open-drain POR output enables reliable microcontroller boot sequencing |
| Thermal Protection | Auto-restart thermal shutdown at 145°C with 15°C hysteresis prevents permanent damage during overload |
| Low-Profile Packaging | 10-lead MSOP (1.1mm max height) supports ultra-thin designs such as handheld scanners and SFP modules |
Applications
| PDA and Pocket PC Computers | Bar Code Readers |
|---|---|
Use Scenario: Powering core logic and display drivers in compact handheld computing devices with limited board area and battery capacity. IC Role / Device Role / Timing Role: Primary 3.3V-to-1.8V step-down regulator supplying processor I/O and memory interface rails. Use Value: 94% efficiency at 350mA extends battery life; 1.1mm MSOP height enables thin mechanical profiles. | Use Scenario: Providing stable 1.2V or 1.8V supply to CMOS image sensors and decode ASICs in battery-operated scanning engines. IC Role / Device Role / Timing Role: High-efficiency buck converter with fast transient response to support burst-mode sensor operation. Use Value: 1.4MHz switching enables small passive components; POR output synchronizes sensor initialization. |
| Cellular Phones | Small Form Factor (SFP) Modules |
Use Scenario: Generating auxiliary voltage rails for RF front-end ICs or audio codecs in legacy GSM/EDGE handsets. IC Role / Device Role / Timing Role: Secondary regulator powered from main 3.3V rail, delivering low-noise 2.5V or 2.8V supply. Use Value: Dual-ground architecture (SGND/PGND) minimizes noise coupling into sensitive RF sections. | Use Scenario: Providing 3.3V-to-1.2V conversion for laser driver and serializer ICs inside pluggable optical transceivers. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC solution meeting SFP MSA height and thermal constraints. Use Value: Fused-lead MSOP package achieves θJA = 100°C/W on 4-layer boards-critical for confined module thermal envelopes. |
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, 1.5MHz switching, no POR output | Lacks integrated POR and RSI functionality; requires external reset circuitry | Preferred where lower output current suffices and POR is implemented externally |
| ISL80019A | Same specs as ISL80019 but with improved EMI performance and tighter VFB tolerance (±1%) | No POR or RSI; higher cost; optimized for noise-sensitive analog subsystems | Chosen when VFB accuracy and conducted EMI are prioritized over system-level reset integration |
Compared with EL7535IYZ-T7, both ISL80019 and ISL80019A offer similar efficiency and footprint but omit the integrated POR/RSI function-requiring additional discrete components for power sequencing, whereas EL7535IYZ-T7 delivers complete system-ready regulation in one MSOP device.
Availability
EL7535IYZ-T7 is available at Aetrix Electronics and suitable for PDA, barcode reader, cellular phone, portable test equipment, and SFP module designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for EL7535IYZ-T7 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 precision analog and power management solutions, serving industrial, infrastructure, mobile computing, and high-end consumer markets.
The EL7535IYZ-T7 belongs to Intersil's monolithic DC/DC regulator product line, engineered specifically for space-constrained, battery-powered portable electronics requiring high efficiency, low quiescent current, and integrated power-good signaling.
FAQ
What is the maximum output current rating for the EL7535IYZ-T7?
The EL7535IYZ-T7 is rated for 350mA continuous output current, with a peak current limit of 1.5A to handle transient overloads. It sustains 350mA across its full -40°C to +85°C operating temperature range when properly heatsinked on a 4-layer PCB. Derating is required above 75°C ambient due to thermal limits.
Does the EL7535IYZ-T7 require external compensation components?
No, the EL7535IYZ-T7 features 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, high-efficiency DC/DC converter.
How does the POR function work on the EL7535IYZ-T7?
The EL7535IYZ-T7 provides an open-drain POR output that remains low for approximately 100ms after the output voltage reaches regulation. When the RSI pin is asserted high, POR immediately goes low and holds for 100ms after RSI returns low-enabling flexible system reset timing without external timers.
What is the purpose of separate SGND and PGND pins on the EL7535IYZ-T7?
The EL7535IYZ-T7 separates SGND (signal ground) and PGND (power ground) to isolate noise-sensitive control circuitry from high-di/dt power switching currents. This separation-combined with a single-point ground connection near the IC-reduces output voltage ripple and improves stability in noisy environments.
Can the EL7535IYZ-T7 be used with a 2.5V input supply?
Yes, the EL7535IYZ-T7 operates from 2.5V to 6V input, making it fully compatible with 2.5V rails. At 2.5V input, it can deliver regulated outputs down to 0.8V (e.g., 0.8V, 1.2V, or 1.8V) using the FB/VO resistor divider, with efficiency maintained above 85% at typical loads.
EL7535IYZ-T7 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-T7 FAQ
1.How can I place an order for EL7535IYZ-T7 through Aetrix?
Please submit a Request for Quotation (RFQ) for EL7535IYZ-T7 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-T7 reliable?
The price and inventory of EL7535IYZ-T7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for EL7535IYZ-T7 is usually 5 days.
3.What payment methods are accepted for EL7535IYZ-T7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for EL7535IYZ-T7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for EL7535IYZ-T7?
EL7535IYZ-T7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your EL7535IYZ-T7 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-T7?
For technical support, including EL7535IYZ-T7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your EL7535IYZ-T7 requirements.
6.How does Aetrix verify that EL7535IYZ-T7 is sourced from the original manufacturer or authorized distributors?
All EL7535IYZ-T7 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-T7 meets industry standards.
7.What is the process for return or replacement of EL7535IYZ-T7?
All EL7535IYZ-T7 units undergo pre-shipment inspection (PSI). If there is an issue with EL7535IYZ-T7, 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-T7 part is unused and in its original packaging.
Return procedure for EL7535IYZ-T7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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