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Renesas ISL78201AVEZ-T7A
- Part No.:
- ISL78201AVEZ-T7A
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL78201AVEZ-T7A.pdf
- Description:
- IC REG BCK BST ADJ 2.5A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
ISL78201AVEZ-T7A 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, enabling cold-cranking resilience in automotive power systems. Key confirmed parameters include ±1% output voltage regulation accuracy, 300µA quiescent current in PFM mode, and programmable 200kHz–2.2MHz switching frequency.
For engineers reviewing the ISL78201AVEZ-T7A datasheet, ISL78201AVEZ-T7A pinout, ISL78201AVEZ-T7A application, or ISL78201AVEZ-T7A equivalent, this page delivers verified technical context for automotive 12V/24V bus regulation, prebiased start-up under battery droop, and dual-mode topology selection between forced PWM and light-load PFM operation.
Technical Context
The ISL78201AVEZ-T7A implements peak current mode control with cycle-by-cycle overcurrent protection, frequency foldback, and hiccup-mode recovery under short-circuit conditions. Its dual LDO architecture-main (VIN-derived) and auxiliary (VOUT-derived)-enables VCC switchover to reduce internal power dissipation after startup.
Topology flexibility includes synchronous buck, non-synchronous buck, two-stage boost-buck, and noninverting single-inductor buck-boost. Mode selection (PWM vs. PFM), current limit threshold (programmable via ILIMIT), and soft-start timing (via SS capacitor) are all externally configurable with discrete components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V–40V (buck); down to 2.5V (boost-buck) - enables operation during automotive cold-crank (≤6V) and stop-start transients. |
| 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) - critical for always-on automotive modules. |
| Voltage Regulation Accuracy | ±1% - ensures stable 3.3V/5V/9V/12V rail generation for MCU, sensor, and I/O supplies. |
| Switching Frequency Range | 200kHz–2.2MHz (programmable via FS resistor) - allows EMI optimization and inductor size reduction. |
| Protection Features | Cycle-by-cycle OCP, hiccup-mode recovery, overvoltage (110%/120%), overtemperature (160°C trip), and PGOOD monitoring - meets ASIL-B functional safety requirements. |
Pinout & Package
ISL78201AVEZ-T7A is housed in a thermally enhanced 20-lead HTSSOP package (M20.173A) with exposed thermal pad (PAD, pin 21) requiring PCB ground plane 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, not signal ground. |
| BOOT (2) | High-side gate driver bias | Supplies floating voltage to drive internal N-channel MOSFET; requires 1µF ceramic capacitor to PHASE. |
| VIN (3,4) | Main input supply | Connects to battery rail; powers integrated high-side MOSFET drain and main LDO; absolute max 44V. |
| SGND (5) | Signal ground reference | Return for control circuitry (FB, COMP, MODE); must be separated from PGND and joined at single point. |
| VCC (6) | Main LDO output | 4.5V ±0.3V regulated supply for IC core; requires ≥4.7µF ceramic decoupling to PGND. |
| AUXVCC (7) | Auxiliary LDO input/output | Accepts VOUT post-startup to reduce IC power dissipation; also serves as boost OV detection input (0.8V threshold). |
| EN (8) | Enable control | Active-high logic input (1.7V threshold); floating = enabled; pulled low = shutdown (≤4.5µA IIN_SD). |
| FS (9) | Frequency set | Resistor-to-GND sets oscillator frequency; open/VCC/GND = fixed 500kHz. |
| SS (10) | Soft-start ramp | 5µA current source charges external capacitor; determines startup time and hiccup-mode dummy cycle duration. |
| FB (11) | Voltage feedback input | Inverting input of error amplifier; senses output via resistor divider; reference = 0.8V. |
| COMP (12) | Error amplifier output | Compensation node for loop stability; connects RC network to FB for Type II/III compensation. |
| ILIMIT (13) | Current limit programming | Resistor-to-GND sets OCP threshold (default 3.6A); enables design-specific short-circuit robustness. |
| MODE (14) | PFM/PWM selection | GND = forced PWM; floating/VCC = PFM; resistor-to-GND programs 700mA default boundary. |
| PGOOD (15) | Power-good indicator | Open-drain output with 128-cycle delay; asserts low on UV/OV or EN deactivation. |
| PHASE (16,17) | Switch node connection | Connects to inductor; ties to source of internal high-side MOSFET; carries high di/dt current. |
| EXT_BOOST (18) | Boost mode enable/detection | Detects >200mV at POR to latch into boost-buck mode; monitors boost input via resistor divider (0.8V threshold). |
| SYNC (19) | Frequency synchronization | Accepts external clock or daisy-chains with other ISL78201s for phase-shifted operation (180° slave offset). |
| LGATE (20) | Low-side gate driver | Drives external low-side MOSFET (buck) or boost MOSFET; requires noise-suppression resistor to GND or VCC. |
| PAD (21) | Thermal pad | Non-electrical thermal interface; must be soldered to large PCB copper area for θJA = 35°C/W. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | rDS(ON) ≤140mΩ enables compact 2.5A buck designs without external high-side switch. |
| Boost-buck topology support | Extends VIN range to 2.5V and maintains regulation when VIN < VOUT - essential for automotive battery droop survival. |
| Programmable PFM/PWM boundary | Resistor on MODE pin adjusts transition current (e.g., 300mA–1.2A), optimizing efficiency across load profiles. |
| VCC switchover to AUXVCC | Reduces internal power dissipation by switching bias supply from main LDO to VOUT-derived LDO post-startup. |
| Hiccup-mode overcurrent protection | Second-tier OCP threshold (115% of primary) triggers extended soft-start disable, preventing thermal runaway during sustained shorts. |
Applications
| Automotive Cold-Cranking Power Supply | Embedded Processor Core Rail |
|---|---|
Use Scenario: Maintaining 5V/3.3V output during engine cranking when battery drops to 3.2V–6V for up to 15ms. IC Role / Device Role / Timing Role: Boost-buck controller regulating output while VIN falls below VOUT, using EXT_BOOST detection and AUXVCC switchover. Use Value: Prevents MCU reset and preserves CAN/Ethernet communication integrity during start-stop cycles. | Use Scenario: Generating clean, low-noise 1.2V/1.8V core voltage for automotive ADAS SoCs with tight transient response. IC Role / Device Role / Timing Role: Synchronous buck controller with programmable 2.2MHz switching and Type III compensation via COMP/FB. Use Value: Achieves <1% load/line regulation and <100ns response to 2A load steps per Figure 22. |
| 24V Industrial Bus Converter | Always-On Telematics Module Supply |
Use Scenario: Stepping down 24V vehicle bus to 5V/12V for infotainment head units and body control modules. IC Role / Device Role / Timing Role: Forced-PWM buck controller with 40V abs max rating and integrated high-side FET handling 24V transients. Use Value: Eliminates need for external TVS/clamp on VIN; withstands ISO 7637-2 pulse 5a (58V/100ms). | Use Scenario: Powering GPS/GSM modules that must remain active during ignition-off periods with minimal battery drain. IC Role / Device Role / Timing Role: PFM-mode buck regulator with 180µA quiescent current (AUXVCC tied to VOUT) and <5µA shutdown current. Use Value: Extends parked vehicle battery life beyond 30 days without recharge in ambient temperatures up to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck/boost-buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4313-AEC1 | 40V, 3A synchronous buck with integrated FETs; no boost-buck capability; fixed 2.2MHz frequency. | Lacks EXT_BOOST/boost-buck mode; unsuitable for cold-crank VIN < VOUT operation. | Select when only buck regulation is needed and higher output current (3A) is required. |
| LM5164QDDARQ1 | 65V, 1A buck controller (external FETs); supports wide VIN but no integrated high-side switch or boost-buck topology. | Requires external high-side MOSFET and gate driver; larger BOM and layout area; no AUXVCC switchover. | Select for ultra-wide VIN (65V) applications where integrated FET is not required and board space permits discrete switches. |
Compared with MPQ4313-AEC1 and LM5164QDDARQ1, the ISL78201AVEZ-T7A uniquely combines integrated high-side FET, boost-buck topology, and VCC switchover-making it the only option among the three capable of maintaining regulated output during sub-VOUT battery voltage events in automotive environments.
Availability
ISL78201AVEZ-T7A is available at Aetrix Electronics and suitable for automotive power systems, embedded processor supplies, and 24V industrial bus converters requiring stable component supply across temperature extremes and long lifecycle commitments.
Supply support for ISL78201AVEZ-T7A 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 connectivity solutions for automotive, industrial, and IoT markets.
The ISL78201AVEZ-T7A belongs to Renesas' automotive-grade power management portfolio, engineered specifically for ASIL-B compliant DC/DC conversion in harsh-temperature, high-reliability vehicle subsystems.
FAQ
What is the maximum input voltage rating for the ISL78201AVEZ-T7A?
The ISL78201AVEZ-T7A has an absolute maximum VIN rating of +44V, with recommended operating range of 3V to 40V in buck mode. During switching, transient spikes must remain within this limit to avoid damage. The device is rated for ISO 7637-2 pulse 5a (58V/100ms) when used with appropriate input filtering, as confirmed by its AEC-Q100 qualification and 40V continuous operation specification.
Does the ISL78201AVEZ-T7A support prebiased output startup?
Yes, the ISL78201AVEZ-T7A supports prebiased output startup, as documented in Figure 20 and Functional Description section (page 13). When the output is already biased at startup, the controller initiates soft-start without forcing reverse current through the inductor or causing output overshoot - a critical feature for hot-swap and redundant power systems.
How is the current limit threshold configured on the ISL78201AVEZ-T7A?
The current limit threshold on the ISL78201AVEZ-T7A is configured via the ILIMIT pin (pin 13). Leaving ILIMIT floating, connecting it to VCC, or grounding it sets the default cycle-by-cycle OCP threshold to 3.6A. A resistor from ILIMIT to GND allows precise programming of the threshold between 2.5A and 4.5A, as specified in the Electrical Specifications table on page 8 of FN8615 Rev 2.00.
Can the ISL78201AVEZ-T7A operate in non-synchronous buck mode?
Yes, the ISL78201AVEZ-T7A supports non-synchronous buck operation. In this configuration, the LGATE pin (pin 20) is disabled by connecting it to VCC through a resistor (<5kΩ) before startup, allowing use of an external Schottky diode instead of a low-side MOSFET. This reduces cost and complexity in lower-efficiency applications where <90% efficiency is acceptable.
What thermal performance can be expected from the ISL78201AVEZ-T7A in a 20 Ld HTSSOP package?
In the 20 Ld HTSSOP package, the ISL78201AVEZ-T7A achieves θJA = 35°C/W (JEDEC standard board) and θJC = 3.5°C/W. Under 2A load, 500kHz, and 100 CFM airflow, die temperature remains ≤140°C at 40V VIN (Figure 14). With proper thermal pad soldering to ≥4 cm² PCB copper, it sustains 2.5A continuous output at +105°C ambient.
ISL78201AVEZ-T7A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- 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-HTSSOP
ISL78201AVEZ-T7A FAQ
1.How can I place an order for ISL78201AVEZ-T7A through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78201AVEZ-T7A 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-T7A reliable?
The price and inventory of ISL78201AVEZ-T7A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78201AVEZ-T7A is usually 5 days.
3.What payment methods are accepted for ISL78201AVEZ-T7A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78201AVEZ-T7A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78201AVEZ-T7A?
ISL78201AVEZ-T7A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78201AVEZ-T7A 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-T7A?
For technical support, including ISL78201AVEZ-T7A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78201AVEZ-T7A requirements.
6.How does Aetrix verify that ISL78201AVEZ-T7A is sourced from the original manufacturer or authorized distributors?
All ISL78201AVEZ-T7A 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-T7A meets industry standards.
7.What is the process for return or replacement of ISL78201AVEZ-T7A?
All ISL78201AVEZ-T7A units undergo pre-shipment inspection (PSI). If there is an issue with ISL78201AVEZ-T7A, 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-T7A part is unused and in its original packaging.
Return procedure for ISL78201AVEZ-T7A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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