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Renesas ISL78201AVEZ
- Part No.:
- ISL78201AVEZ
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL78201AVEZ.pdf
- Description:
- IC REG BCK BST ADJ 2.5A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,158
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Product details
Overview
ISL78201AVEZ from Renesas Electronics is an AEC-Q100 qualified 40V, 2.5A synchronous buck or boost-buck 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, operates from −40°C to +105°C, and enables cold-cranking resilience in automotive power systems.
For engineers reviewing the ISL78201AVEZ datasheet, ISL78201AVEZ pinout, ISL78201AVEZ application, or ISL78201AVEZ 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), real-world quiescent current values (300 µA PFM, 180 µA with AUXVCC tied to VOUT), and AEC-Q100-compliant thermal and protection behavior.
Technical Context
The ISL78201AVEZ 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 bias regulator (VIN-powered) and auxiliary regulator (AUXVCC-powered)-enables VCC switchover to reduce internal power dissipation after startup.
It supports flexible topology configuration via EXT_BOOST pin detection (≥200 mV = boost-buck latch; <200 mV = buck latch), programmable PFM/PWM boundary (default 700 mA, adjustable via MODE pin resistor), and external synchronization (SYNC pin accepts 10% higher frequency square wave with ≥150 ns pulse width).
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 battery sag) without dropout. |
| Output Current Rating | 2.5A continuous - determined by integrated high-side MOSFET rDS(ON) of 140 mΩ (max @ +25°C) and thermal design margin. |
| Quiescent Current | 300 µA (PFM, no load); 180 µA (PFM, no load, AUXVCC = VOUT ≤12V) - sustains ultra-low-power sleep states in always-on vehicle modules. |
| Voltage Regulation Accuracy | ±1% - ensures stable 3.3V/5V/9V/12V rail generation for sensitive microcontrollers and sensors across temperature and line/load variation. |
| Switching Frequency Range | 200 kHz–2.2 MHz (programmable via FS pin resistor) - allows EMI optimization and inductor size reduction while maintaining stability in noisy automotive environments. |
| Protection Features | Cycle-by-cycle OCP, hiccup-mode OCP, overvoltage (110%/120% trip), overtemperature (160°C trip), and PGOOD monitoring - guarantees robust fault handling in harsh under-hood conditions. |
| Ambient Operating Range | −40°C to +105°C - meets automotive Grade 2 requirements for engine bay and infotainment power supplies. |
Pinout & Package
ISL78201AVEZ 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 effective heat dissipation. Pin numbering follows top-view layout per datasheet Figure 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power ground return | Low-impedance path for high-current switching loop (high-side source, low-side sink); must be connected to power ground plane, separate from SGND. |
| BOOT (2) | High-side gate driver bootstrap supply | Internally charged via integrated boot circuit; requires 1 µF ceramic capacitor to PHASE - eliminates need for external boot diode. |
| VIN (3,4) | Main input supply | Connects to drain of integrated high-side MOSFET and input to main LDO; absolute max 44V transient rating supports load-dump immunity. |
| SGND (5) | Analog/Control ground | Reference for FB, COMP, MODE, ILIMIT, EN, SYNC - must be star-connected to PGND at single point to avoid noise coupling. |
| VCC (6) | Main LDO output | 4.5V ±3% regulated supply for IC core and drivers; requires ≥4.7 µF ceramic decoupling to PGND. |
| AUXVCC (7) | Auxiliary LDO input / Boost OV sense | Accepts 3V–20V input to replace main LDO post-startup; in boost mode, senses output via resistor divider with 0.8V threshold and hysteresis. |
| EN (8) | Enable control | Active-high logic input (1.7V threshold); floating = enabled; pulled low = shutdown (≤4.5 µA IIN_SD). |
| FS (9) | Frequency select | Resistor-to-GND sets oscillator frequency (200 kHz–2.2 MHz); open/VCC/GND = fixed 500 kHz. |
| SS (10) | Soft-start timing | 5 µA internal current charges external capacitor; time to 0.8V determines ramp rate - prevents inrush current and enables prebiased start-up. |
| FB (11) | Voltage feedback input | Inverting input of error amplifier referenced to 0.8V internal bandgap; resistor divider from VOUT sets output voltage (e.g., 5V = R1/R2 = 5.25). |
| COMP (12) | Error amplifier output | Compensation node for loop stability; RC network between COMP and FB sets pole/zero placement for phase margin >45°. |
| ILIMIT (13) | Current limit programming | Default 3.6A threshold when open/GND/VCC; resistor-to-GND adjusts limit - critical for inductor saturation and MOSFET SOA compliance. |
| MODE (14) | PFM/PWM selection | GND = forced PWM; floating/VCC = PFM (700 mA default boundary); resistor-to-GND programs boundary current (EQ.2). |
| PGOOD (15) | Power-good indicator | Open-drain output with 128-cycle delay on rising edge; pulled low on UV/OV/fault or EN deactivation - used for system sequencing and fault reporting. |
| PHASE (16,17) | Switch node | Connected to inductor and source of integrated high-side MOSFET; carries full switching current and high dv/dt - requires tight layout and snubber if ringing exceeds EMC limits. |
| EXT_BOOST (18) | Boost mode enable/sense | Detects ≥200 mV at POR to latch into boost-buck mode; in boost operation, monitors input via resistor divider with 0.8V threshold and hysteresis. |
| SYNC (19) | External clock synchronization | Accepts external square wave (10% higher freq, ≥150 ns pulse) or connects to other ISL78201s for phase-shifted multi-phase operation (180° slave shift). |
| LGATE (20) | Low-side gate driver output | Drives external N-MOSFET in synchronous buck; disabled by pull-up to VCC in non-synchronous buck; drives boost FET in boost-buck mode. |
| PAD (21) | Thermal pad | Electrically isolated copper pad; must be soldered to large PCB ground plane to achieve θJA = 35°C/W and sustain 2.5A continuous operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side MOSFET | rDS(ON) = 140 mΩ (max) enables compact 2.5A buck designs without external high-side switch - reduces BOM count and layout complexity. |
| Multi-topology support | Configurable as synchronous buck, non-synchronous buck, two-stage boost-buck, or noninverting single-inductor buck-boost - eliminates need for multiple controllers across vehicle platforms. |
| AEC-Q100 qualification | Grade 2 (−40°C to +105°C ambient), including HBM 2kV ESD, latch-up Class II Level A (100mA), and extended life testing - certified for safety-critical automotive power rails. |
| Programmable PFM/PWM boundary | Resistor-adjustable transition current (700 mA default) optimizes light-load efficiency across diverse loads - e.g., 10 mA sensor rail vs. 2A infotainment processor. |
| VCC switchover to AUXVCC | Reduces internal power dissipation by switching bias supply from VIN-powered main LDO to VOUT-powered auxiliary LDO post-startup - improves thermal margin at high VIN. |
| Hiccup-mode overcurrent protection | Second-tier OCP threshold (115% of primary limit) triggers dummy soft-start (5× duration) with zero PWM output - prevents thermal runaway during sustained shorts. |
Applications
| Automotive Cold-Crank Power Supply | Start-Stop System DC-DC Converter |
|---|---|
Use Scenario: Maintaining stable 5V/3.3V supply to body control module (BCM) during engine cranking, where battery voltage drops to 3.2V for up to 15 ms. IC Role / Device Role / Timing Role: ISL78201AVEZ operates in boost-buck mode, regulating output even when VIN falls below VOUT, using EXT_BOOST pin to detect low input and enable boost action. Use Value: Prevents microcontroller brownout and communication loss (CAN/LIN) during cranking - verified in Figure 27/28 with 40V→3V and 3V→40V transitions. |
Use Scenario: Providing uninterrupted 12V rail to infotainment head unit during automatic engine stop/start cycles, where battery voltage fluctuates between 12.8V (running) and 9.5V (stopped). IC Role / Device Role / Timing Role: ISL78201AVEZ configured in forced PWM mode ensures consistent switching frequency and minimal output ripple during rapid VIN transients. Use Value: Eliminates audio pop/click and display flicker by sustaining regulation during sub-100ms voltage dips - supported by 500kHz fixed-frequency operation and fast transient response. |
| Embedded Processor Core Supply | 24V Industrial Bus Regulator |
Use Scenario: Generating tightly regulated 1.2V/1.8V core voltage for automotive ADAS SoC (e.g., TI TDA4VM) with dynamic current demand from 10 mA (idle) to 2.2A (AI inference). IC Role / Device Role / Timing Role: ISL78201AVEZ uses peak current mode control and programmable ILIMIT to maintain stability across wide load steps, with PFM mode reducing idle power. Use Value: Achieves >85% efficiency at 2A load (Figure 11) and <300 µA quiescent current in PFM - extends battery runtime in always-on ADAS cameras. |
Use Scenario: Converting 24V industrial bus to isolated 5V/12V for PLC I/O modules operating in factory environments with high EMI and ambient temperatures up to +85°C. IC Role / Device Role / Timing Role: ISL78201AVEZ leverages its 40V absolute max rating and −40°C to +105°C operating range to withstand 48V transients and thermal stress. Use Value: Delivers reliable 2.5A output without derating at +85°C ambient - validated in Figure 14 (105°C ambient, 100 CFM airflow, 2A load). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck/boost-buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4312-AEC1 | 40V, 2A, integrated high-side/low-side MOSFETs; fixed 500kHz frequency; no boost-buck capability; smaller 12-pin QFN package. | Lacks EXT_BOOST pin and boost-buck topology support - unsuitable for cold-crank resilience or VIN < VOUT operation. | Select MPQ4312-AEC1 only for cost-sensitive, space-constrained buck-only designs where input never drops below output. |
| LM5164QDGQRQ1 | 65V, 1A, external MOSFET controller; supports buck, buck-boost, SEPIC; programmable frequency (100kHz–2.2MHz); no integrated high-side FET. | Requires external high-side MOSFET and gate driver; higher component count but wider VIN range and greater topology flexibility. | Choose LM5164QDGQRQ1 when input may exceed 40V (e.g., 48V truck systems) or when custom MOSFET selection is needed for thermal/power trade-offs. |
Compared with MPQ4312-AEC1, ISL78201AVEZ adds boost-buck capability and higher current rating but requires larger HTSSOP layout; versus LM5164QDGQRQ1, it reduces BOM count and layout risk via integration but sacrifices VIN headroom and topology versatility.
Availability
ISL78201AVEZ is available at Aetrix Electronics and suitable for automotive cold-crank power supplies, start-stop system DC-DC converters, and embedded processor core supplies requiring stable component supply across extended temperature and high-reliability environments.
Supply support for ISL78201AVEZ 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 belongs to Renesas' automotive-grade power management portfolio, designed specifically for robust, high-efficiency DC-DC conversion in engine control units, ADAS cameras, and infotainment systems operating under AEC-Q100 stress conditions.
FAQ
What topologies does the ISL78201AVEZ support?
The ISL78201AVEZ supports four operational topologies: synchronous buck, non-synchronous buck, two-stage boost-buck, and noninverting single-inductor buck-boost. Topology selection is determined by the EXT_BOOST pin voltage at power-on - ≥200 mV latches boost-buck mode, while <200 mV selects buck mode. The ISL78201AVEZ datasheet confirms all four configurations in Figures 4–6 and Table 1.
How does the ISL78201AVEZ achieve cold-crank resilience?
The ISL78201AVEZ achieves cold-crank resilience through its boost-buck topology: when VIN drops below VOUT (e.g., to 2.5V during cranking), the device automatically engages boost action using the EXT_BOOST pin and internal low-side driver to maintain regulated output. This behavior is validated in Figures 27–29 and explicitly stated in the datasheet's first paragraph and "Boost-Buck Mode" section.
What is the purpose of the AUXVCC pin on the ISL78201AVEZ?
The AUXVCC pin on the ISL78201AVEZ serves dual roles: (1) as input to an auxiliary LDO that replaces the main VIN-powered LDO after startup - reducing internal power dissipation and improving thermal performance; and (2) in boost-buck mode, as an overvoltage sense input with 0.8V threshold to disable boost PWM when output exceeds regulation. Datasheet pages 2 and 14 detail both functions.
Can the ISL78201AVEZ operate with a prebiased output?
Yes, the ISL78201AVEZ supports prebiased start-up, meaning it can safely begin regulation when the output capacitor is already charged to a voltage near the target. This is enabled by the soft-start circuit's ability to track an external ramp on the SS pin and is confirmed in Figure 20 and the "Functional Description" section (page 13) of the ISL78201AVEZ datasheet.
What protection features are built into the ISL78201AVEZ?
The ISL78201AVEZ integrates cycle-by-cycle overcurrent protection with frequency foldback, hiccup-mode recovery (115% OCP threshold), overvoltage protection (110%/120% trip points), overtemperature protection (160°C trip), and PGOOD monitoring with 128-cycle delay. All protections are AEC-Q100 qualified and detailed in Sections 5 ("Features") and 7 ("Electrical Specifications") of the ISL78201AVEZ datasheet.
ISL78201AVEZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for ISL78201AVEZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78201AVEZ 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 reliable?
The price and inventory of ISL78201AVEZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78201AVEZ is usually 5 days.
3.What payment methods are accepted for ISL78201AVEZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78201AVEZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78201AVEZ?
ISL78201AVEZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78201AVEZ 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?
For technical support, including ISL78201AVEZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78201AVEZ requirements.
6.How does Aetrix verify that ISL78201AVEZ is sourced from the original manufacturer or authorized distributors?
All ISL78201AVEZ 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 meets industry standards.
7.What is the process for return or replacement of ISL78201AVEZ?
All ISL78201AVEZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL78201AVEZ, 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 part is unused and in its original packaging.
Return procedure for ISL78201AVEZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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