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Renesas ISL78201AVEZ-TR5506
- Part No.:
- ISL78201AVEZ-TR5506
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
ISL78201AVEZ-TR5506.pdf
- Description:
- IC REG BUCK BST ADJ 2.5A 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,694
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Product details
Overview
ISL78201AVEZ-TR5506 from Renesas Electronics is an AEC-Q100 qualified 40V, 2.5A synchronous buck or boost-buck DC/DC controller with integrated high-side MOSFET and low-side gate driver. It supports 3V–40V input in buck mode and extends down to 2.5V in boost-buck topology, delivers ±1% output voltage regulation accuracy, and operates across –40°C to +105°C for automotive cold-cranking and start-stop systems.
For engineers reviewing the ISL78201AVEZ-TR5506 datasheet, ISL78201AVEZ-TR5506 pinout, ISL78201AVEZ-TR5506 application, or ISL78201AVEZ-TR5506 equivalent, this page provides verified technical context, validated pin functions, confirmed topology support (synchronous/non-synchronous buck, two-stage boost-buck, noninverting single-inductor buck-boost), and real-world protection behavior including hiccup-mode overcurrent and programmable frequency foldback.
Technical Context
The ISL78201AVEZ-TR5506 implements peak current mode control with cycle-by-cycle current limiting, temperature-compensated current sensing, and dual overcurrent thresholds (3.6A default limit, 115% hiccup threshold). Its oscillator supports 200kHz–2.2MHz programmable switching frequency and external synchronization with 180° phase shift between master/slave ICs.
It integrates two LDOs: a main 4.5V ±0.3V bias regulator (VIN-powered) and an auxiliary 4.5V ±0.3V LDO (AUXVCC-powered), enabling VOUT-to-AUXVCC switchover to reduce internal power dissipation. The EXT_BOOST pin enables automatic topology selection (buck vs. boost-buck) based on post-POR voltage detection (>200mV triggers boost mode).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V–40V (buck); down to 2.5V (boost-buck) - enables operation during automotive battery sag below 6V. |
| Output Current Capability | 2.5A continuous - defined by thermal limits and integrated high-side MOSFET rDS(ON) of 140mΩ max at +25°C. |
| Quiescent Current | 300µA (PFM, no load); 180µA (PFM, no load, AUXVCC tied to VOUT) - sustains ultra-low-power sleep states in always-on ECUs. |
| Voltage Regulation Accuracy | ±1% - ensures stable 5V/3.3V/9V rail delivery for microcontrollers and sensors under line/load transients. |
| Switching Frequency Range | 200kHz–2.2MHz - allows EMI optimization and inductor size reduction while maintaining light-load PFM efficiency. |
| Protection Features | Cycle-by-cycle OCP, hiccup-mode OCP, overvoltage (110%/120% trip), overtemperature (160°C trip), and PGOOD monitoring - guarantees robustness in harsh automotive environments. |
| Ambient Temperature Range | –40°C to +105°C - qualified per AEC-Q100 Grade 2 for under-hood and body-control module deployment. |
Pinout & Package
ISL78201AVEZ-TR5506 is housed in a thermally enhanced 20-lead HTSSOP package (M20.173A) with exposed thermal pad (PAD, pin 21) requiring direct PCB ground connection for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power ground return | Low-impedance path for high-current switch node return; must be connected to power ground plane, separate from SGND. |
| BOOT (2) | High-side gate driver supply | Bootstrap capacitor node (BOOT–PHASE) supplies gate drive voltage for integrated N-channel MOSFET; no external diode required. |
| VIN (3,4) | Main input supply | Connects to battery rail; powers internal main LDO and high-side MOSFET drain; absolute max 44V transient rating. |
| SGND (5) | Analog ground reference | Return for FB, COMP, MODE, ILIMIT, SYNC, and other control circuitry; must be star-connected to avoid noise coupling. |
| VCC (6) | Main LDO output | 4.5V ±0.3V regulated supply for IC core and drivers; requires ≥4.7µF ceramic decoupling to PGND. |
| AUXVCC (7) | Auxiliary LDO input | Accepts 3V–20V input; enables VOUT-powered biasing to reduce die temperature; also serves as boost output OVP sense in boost mode. |
| EN (8) | Enable control | Active-high logic input (1.7V threshold); floating = enabled; pulled low = shutdown (≤4.5µA quiescent current). |
| FS (9) | Frequency select | Resistor-to-GND sets switching frequency (200kHz–2.2MHz); open/GND/VCC forces 500kHz default. |
| SS (10) | Soft-start timing | 5µA current source charges external capacitor; controls ramp rate of output voltage during startup and hiccup recovery. |
| FB (11) | Voltage feedback input | Inverting input of error amplifier; senses output via resistor divider; reference = 0.8V; monitors OV/UV for PGOOD assertion. |
| COMP (12) | Error amplifier output | Compensation node for loop stability; connects RC network between COMP and FB to set bandwidth and phase margin. |
| ILIMIT (13) | Current limit programming | Resistor-to-GND sets peak current threshold (default 3.6A); enables precise OCP tuning for different inductor/inductor DCR designs. |
| MODE (14) | PFM/PWM mode control | Pull to GND = forced PWM; float/VCC = PFM at light load; resistor-to-GND programs PFM boundary current (e.g., 700mA default). |
| PGOOD (15) | Power-good indicator | Open-drain output with 128-cycle delay; pulled low on EN deassertion, output OV/UV, or thermal shutdown. |
| PHASE (16,17) | Switch node | Connects to inductor; tied to source of internal high-side MOSFET; critical for layout to minimize parasitic inductance. |
| EXT_BOOST (18) | Boost mode enable/sense | Detects >200mV post-POR to latch into boost-buck mode; in boost mode, monitors input via resistor divider for OVP (0.8V threshold). |
| SYNC (19) | External clock sync | Accepts square-wave input (≥150ns pulse width); locks internal oscillator; enables multi-phase interleaving with 180° phase shift. |
| LGATE (20) | Low-side gate driver output | Drives external low-side MOSFET in synchronous buck; disabled in non-synchronous buck (tie to VCC pre-startup); drives boost FET in boost mode. |
| PAD (21) | Thermal pad | Electrically isolated copper pad; must be soldered to large PCB ground plane to achieve θJC = 3.5°C/W and sustain 2.5A operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | rDS(ON) ≤140mΩ enables compact 2.5A buck solutions without external high-side switch, reducing BOM count and layout complexity. |
| Topology flexibility | Supports four operational modes - synchronous buck, non-synchronous buck, two-stage boost-buck, and noninverting single-inductor buck-boost - simplifying platform reuse across 12V/24V/48V systems. |
| Ultra-low quiescent current | 180µA in PFM mode with AUXVCC tied to VOUT extends battery life in always-on vehicle modules such as telematics and ADAS sensors. |
| Robust fault protection | Hiccup-mode OCP with frequency foldback prevents thermal runaway during sustained short-circuit events while maintaining system-level reliability. |
| AEC-Q100 Grade 2 qualification | Validated for –40°C to +105°C ambient operation with full electrical testing across temperature, ensuring compliance for engine bay and chassis applications. |
| VCC switchover architecture | Automatic transition from main VIN-powered LDO to AUXVCC-powered LDO after startup reduces internal power dissipation by up to 40% at high VIN. |
Applications
| Automotive Start-Stop Systems | Body Control Modules (BCM) |
|---|---|
Use Scenario: Maintains stable 5V supply to microcontrollers and CAN transceivers during engine cranking when battery voltage drops to 3V–6V. IC Role / Device Role / Timing Role: Acts as primary buck-boost regulator with seamless transition between buck and boost-buck topologies to sustain VOUT regulation below VIN. Use Value: Eliminates need for separate pre-regulator and post-regulator stages, reducing solution size and cost while meeting ISO 16750-2 pulse 4 requirements. |
Use Scenario: Powers 3.3V I/O rails and LIN transceivers in door modules and lighting controllers with variable load profiles. IC Role / Device Role / Timing Role: Functions as synchronous buck converter with programmable PFM/PWM boundary to optimize efficiency across 10mA–2A load range. Use Value: Achieves >90% efficiency at 2A and >85% at 10mA, extending vehicle battery life during extended parking modes. |
| Advanced Driver Assistance Systems (ADAS) | Infotainment Power Management |
Use Scenario: Supplies clean 9V rail to radar MMICs and image signal processors subject to high EMI and thermal stress. IC Role / Device Role / Timing Role: Operates in forced PWM mode with 2.2MHz switching to minimize inductor size and avoid AM/FM band interference. Use Value: Delivers tight ±1% regulation and <10mVpp output ripple even under 2A step loads, ensuring sensor data integrity. |
Use Scenario: Regulates 12V bus down to 5V for USB ports and display backlight drivers in head units with dynamic load demands. IC Role / Device Role / Timing Role: Implements VOUT-to-AUXVCC switchover to reduce thermal load at high input voltages (e.g., 24V truck systems). Use Value: Lowers junction temperature by up to 25°C compared to main-LDO-only operation, improving long-term reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck-boost controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78206AVEZ-T7A | No boost-buck capability; no AUXVCC or EXT_BOOST pins; fixed PWM-only operation; same 20-lead HTSSOP package. | Limited to standard buck conversion only; unsuitable for cold-crank or wide-input-range applications requiring VIN < VOUT. | Select ISL78206AVEZ-T7A only when topology is strictly buck and ultra-low IQ is not required - saves cost where boost-buck is unnecessary. |
| MPQ4312-AEC1 | 40V, 2A synchronous buck with integrated FETs; no boost-buck mode; lower IQ (25µA shutdown); different pinout and compensation scheme. | Requires external components for boost-buck functionality; lacks hiccup-mode OCP and programmable frequency sync. | Choose MPQ4312-AEC1 for cost-sensitive buck-only designs needing minimal external parts but accept reduced fault robustness and topology flexibility. |
Compared with ISL78201AVEZ-TR5506, ISL78206AVEZ-T7A sacrifices boost-buck operation and PFM efficiency for simpler control, while MPQ4312-AEC1 trades integrated topology versatility for lower standby power and smaller solution footprint in pure buck applications.
Availability
ISL78201AVEZ-TR5506 is available at Aetrix Electronics and suitable for automotive start-stop systems, body control modules, ADAS domain controllers, and infotainment power supplies requiring stable component supply across extended temperature and high-reliability automotive lifecycles.
Supply support for ISL78201AVEZ-TR5506 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
Renesas Electronics is a global semiconductor leader delivering microcontrollers, analog power, and SoC solutions for automotive, industrial, and IoT markets with emphasis on functional safety and AEC-Q100 compliance.
The ISL78201AVEZ-TR5506 belongs to Renesas' ISL78xxx automotive power management family, engineered specifically for high-efficiency, fault-tolerant DC/DC conversion in engine control units, battery management systems, and ADAS power domains.
FAQ
What topologies does the ISL78201AVEZ-TR5506 support?
The ISL78201AVEZ-TR5506 supports four distinct topologies: synchronous buck, non-synchronous buck, two-stage boost-buck, and noninverting single-inductor buck-boost. Its EXT_BOOST pin automatically selects buck or boost-buck mode based on post-POR voltage detection, and LGATE can drive either an external low-side MOSFET or a boost power FET depending on configuration. This eliminates the need for multiple discrete controllers across vehicle platforms.
How does the ISL78201AVEZ-TR5506 achieve ultra-low quiescent current?
The ISL78201AVEZ-TR5506 achieves 180µA quiescent current in PFM mode by connecting AUXVCC to VOUT after startup, enabling switchover from the main VIN-powered LDO to the more efficient AUXVCC-powered LDO. This reduces internal power dissipation significantly - especially at high input voltages - while maintaining full regulation and protection functionality during low-load conditions typical in automotive standby modes.
What is the purpose of the ILIMIT pin on the ISL78201AVEZ-TR5506?
The ILIMIT pin on the ISL78201AVEZ-TR5506 allows precise programming of the peak current limit threshold used in cycle-by-cycle overcurrent protection. With no resistor, it defaults to 3.6A; adding a resistor to ground scales the threshold linearly (e.g., 100kΩ yields ~2.2A). This enables design-specific OCP tuning for different inductor values, DCR sensing, and fault-handling requirements without changing the IC or layout.
Can the ISL78201AVEZ-TR5506 operate with a prebiased output?
Yes, the ISL78201AVEZ-TR5506 supports prebiased output startup. Its soft-start circuitry and control architecture allow the output capacitor to retain residual voltage during power cycling, and the IC ramps up regulation without forcing reverse current through the inductor or causing output overshoot. This is essential for systems requiring uninterrupted power to volatile memory or real-time clocks during brief supply interruptions.
How is thermal performance managed in the ISL78201AVEZ-TR5506?
The ISL78201AVEZ-TR5506 uses a thermally enhanced 20-lead HTSSOP package with an exposed PAD (pin 21) that must be soldered to a large PCB ground copper area. With proper layout, it achieves θJC = 3.5°C/W, enabling 2.5A continuous operation at +105°C ambient with 100 CFM airflow. The VOUT-to-AUXVCC switchover further reduces die temperature by up to 25°C compared to main-LDO-only operation at high VIN.
ISL78201AVEZ-TR5506 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 38V
- Current - Output:
- 2.5A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Both
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
ISL78201AVEZ-TR5506 FAQ
1.How can I place an order for ISL78201AVEZ-TR5506 through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78201AVEZ-TR5506 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 ISL78201AVEZ-TR5506 reliable?
The price and inventory of ISL78201AVEZ-TR5506 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78201AVEZ-TR5506 is usually 5 days.
3.What payment methods are accepted for ISL78201AVEZ-TR5506?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78201AVEZ-TR5506 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78201AVEZ-TR5506?
ISL78201AVEZ-TR5506 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78201AVEZ-TR5506 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 ISL78201AVEZ-TR5506?
For technical support, including ISL78201AVEZ-TR5506 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78201AVEZ-TR5506 requirements.
6.How does Aetrix verify that ISL78201AVEZ-TR5506 is sourced from the original manufacturer or authorized distributors?
All ISL78201AVEZ-TR5506 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 ISL78201AVEZ-TR5506 meets industry standards.
7.What is the process for return or replacement of ISL78201AVEZ-TR5506?
All ISL78201AVEZ-TR5506 units undergo pre-shipment inspection (PSI). If there is an issue with ISL78201AVEZ-TR5506, 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 ISL78201AVEZ-TR5506 part is unused and in its original packaging.
Return procedure for ISL78201AVEZ-TR5506:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ISL78201AVEZ-TR5506 Tags
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