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Renesas ISL78200AVEZ
- Part No.:
- ISL78200AVEZ
- Manufacturer:
- Renesas
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
ISL78200AVEZ.pdf
- Description:
- IC REG BCK BST ADJ 2.5A 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,411
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Product details
Overview
ISL78200AVEZ from Renesas Electronics (formerly Intersil) is a synchronous buck controller with integrated 90 mΩ high-side MOSFET and low-side gate driver, supporting buck, non-synchronous buck, and two-stage boost-buck topologies. It delivers 2.5 A continuous output at 5 V with 8–36 V input, 500 kHz switching, and +85°C ambient in still air. Designed for automotive power regulation, it operates across –40°C to +105°C and meets AEC-Q100 Grade 1.
For engineers reviewing the ISL78200AVEZ datasheet, ISL78200AVEZ pinout, ISL78200AVEZ application, or ISL78200AVEZ equivalent, this device offers programmable 200–2200 kHz frequency, ±1% output voltage accuracy, cycle-by-cycle overcurrent protection with hiccup mode, PFM/PWM mode selection, and AUXVCC-driven LDO switchover for ultra-low quiescent current (180 µA) in battery-powered systems.
Technical Context
The ISL78200AVEZ implements peak current-mode control with integrated slope compensation, enabling fast transient response and inherent cycle-by-cycle current limiting. Its dual-LDO architecture-main bias LDO (VIN-referenced) and auxiliary LDO (AUXVCC-referenced)-supports automatic switchover after startup to reduce power dissipation at high VIN.
It supports three distinct operational topologies: synchronous buck (LGATE drives external low-side FET), non-synchronous buck (LGATE disabled via VCC tie), and boost-buck (EXT_BOOST enables boost pre-regulator down to <2.5 V input). Mode selection (PWM vs. PFM), current limit threshold (3.0–4.2 A), and soft-start timing are all externally programmable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.05 V to 40 V - supports wide automotive bus (12 V/24 V/36 V) and cold-crank tolerant operation |
| Continuous Output Current | 2.5 A at 5 VOUT, 8–36 VIN, 500 kHz, +85°C ambient - validated under real thermal conditions with still air cooling |
| Switching Frequency | 200 kHz to 2.2 MHz - programmable via FS resistor; supports synchronization across multiple ICs with 180° phase shift |
| Output Voltage Accuracy | ±1% - tight regulation referenced to internal 0.8 V bandgap, critical for processor/I/O supply stability |
| Quiescent Current (PFM) | 180 µA - achieved when AUXVCC is connected to VOUT under 12 V VIN / 5 V VOUT, enabling >10-year battery life in always-on modules |
| Overcurrent Protection | Programmable 3.0–4.2 A cycle-by-cycle limit + hiccup mode - prevents thermal runaway during sustained short-circuit faults |
| Operating Temperature | –40°C to +105°C ambient - qualified per AEC-Q100 Grade 1, suitable for under-hood automotive applications |
Pinout & Package
ISL78200AVEZ is housed in a thermally enhanced 20-lead HTSSOP package (MDP0048) with exposed thermal pad (Pin 21) requiring PCB ground plane connection for effective heat dissipation (θJA = 35°C/W, θJC = 3.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (1) | Power ground return | Low-impedance path for high-current switch node return; must be tied to power ground plane, not signal ground |
| BOOT (2) | High-side gate driver bootstrap supply | Internally refreshed; requires 1 µF ceramic capacitor to PHASE - no external diode needed |
| VIN (3,4) | Main input supply | Connects to drain of integrated 90 mΩ high-side MOSFET and main LDO input; rated 3–40 V |
| SGND (5) | Signal ground reference | Separate return for FB, COMP, MODE, etc.; must be star-connected to PGND at single point to avoid noise coupling |
| VCC (6) | Main LDO output | 4.5 V ±0.3 V regulated supply for internal circuitry; requires ≥4.7 µF ceramic decoupling to SGND |
| AUXVCC (7) | Auxiliary LDO input / Boost OVP sense | In buck mode: powers auxiliary LDO for low-IQ operation; in boost mode: monitors boost output via resistor divider (trip @ 0.8 V) |
| EN (8) | Enable control | Active-high logic; pulls up internally (~0.5 µA); enables IC when >2 V, disables when <0.8 V |
| FS (9) | Frequency set/sync input | Resistor-to-GND sets frequency (200–2200 kHz); also accepts external sync clock (10% higher freq, >150 ns pulse) |
| SS (10) | Soft-start ramp | Charged by internal 5 µA current source; capacitor value sets soft-start time; also used for tracking |
| FB (11) | Feedback input | Inverting input of error amplifier; senses output via resistor divider; monitored for OV/UV protection |
| COMP (12) | Error amplifier output | Compensation node for voltage loop; connects RC network between COMP and FB for stability |
| ILIMIT (13) | Current limit programming | Resistor-to-GND sets OCP threshold (default 3.6 A); open/VCC/GND yields fixed 3.6 A |
| MODE (14) | PFM/PWM mode select | GND = forced PWM; floating/VCC = PFM; resistor-to-GND programs PFM/PWM boundary current (e.g., 700 mA default) |
| PGOOD (15) | Power-good indicator | Open-drain output with 1000-cycle delay on power-up; asserts low on OV/UV or EN deactivation |
| EXT_BOOST (18) | Boost enable/voltage monitor | Detects >200 mV at POR to latch into boost mode; in boost: monitors input via resistor divider (0.8 V trip) |
| SYNC (19) | Master/slave synchronization | Enables multi-phase operation; auto-generates 180° phase shift between master and slave ICs |
| LGATE (20) | Low-side gate driver output | Drives external N-channel MOSFET in synchronous buck; must tie to VCC before startup in non-synchronous mode |
| PHASE (16,17) | Switch node | Connects to inductor; tied to source of internal high-side MOSFET - high dv/dt node requiring tight layout |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 90 mΩ high-side MOSFET | Eliminates external high-side switch and associated gate drive complexity while maintaining 2.5 A capability at 5 VOUT |
| Three configurable topologies | Single IC supports synchronous buck, non-synchronous buck (diode-based), and boost-buck - reduces BOM count across vehicle platforms |
| AUXVCC LDO switchover | Reduces internal power loss at high VIN by switching bias supply from main LDO to AUXVCC-derived LDO post-startup |
| Hiccup-mode overcurrent protection | Enters controlled restart cycle during sustained overload - prevents thermal damage without requiring external reset circuitry |
| Pre-biased output start-up | Supports seamless power sequencing in systems where output rail is pre-charged (e.g., hot-swap, backup supplies) |
Applications
| Automotive ADAS Camera Power | 12 V Bus DC-DC Pre-regulator |
|---|---|
|
Use Scenario: Powering image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: Synchronous buck regulator delivering stable 1.8 V/3.3 V from 9–16 V battery rail with low EMI and high efficiency at light load. Use Value: AEC-Q100 qualification ensures reliability in harsh thermal environments; PFM mode extends battery runtime during parking surveillance. |
Use Scenario: Generating intermediate 5 V rail from noisy 12 V vehicle bus for downstream point-of-load converters. IC Role / Device Role / Timing Role: Primary buck controller with 40 V max input rating tolerating load-dump transients; programmable frequency avoids AM radio band. Use Value: Integrated high-side FET and robust OVP/OCP protect against automotive fault conditions; HTSSOP package enables compact layout near connector. |
| Start-Stop Microcontroller Supply | Industrial IoT Sensor Node |
|
Use Scenario: Providing regulated 3.3 V supply to MCU and CAN transceiver in engine control units with frequent stop-start cycles. IC Role / Device Role / Timing Role: Buck converter operating from 6–40 V input, supporting cold-crank (6 V) and load-dump (40 V) extremes. Use Value: 180 µA quiescent current in PFM mode minimizes parasitic drain during extended idle; pre-biased start-up ensures deterministic boot after restart. |
Use Scenario: Battery-powered wireless sensor node requiring multi-year operation on primary Li-SOCl₂ cell. IC Role / Device Role / Timing Role: High-efficiency buck regulator stepping 3.6 V nominal battery to 1.8 V for ultra-low-power MCU and RF transceiver. Use Value: 180 µA IQ and programmable PFM boundary enable >10-year shelf life; AEC-Q100 qualification adds margin for industrial temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ISL78201AVEZ | Pin-compatible successor with improved thermal performance (lower RθJA), enhanced hiccup recovery, and updated AEC-Q100 test report; same 20-lead HTSSOP package. | Recommended for new designs requiring longer product lifecycle support and tighter thermal margins in high-ambient applications. | Select ISL78201AVEZ when designing new automotive modules; ISL78200AVEZ remains viable for legacy production and cost-sensitive replacements. |
| MPQ4312-AEC1 | Monolithic 3 A buck converter (no external LGATE driver); 3.8–36 V input; 500 kHz fixed frequency; lacks boost-buck topology and AUXVCC switchover. | Better suited for simpler, cost-optimized 12 V → 3.3 V/5 V conversion where boost-buck and ultra-low IQ are not required. | Choose MPQ4312-AEC1 for space-constrained, single-rail applications where integrated 3 A capability outweighs topology flexibility. |
Compared with ISL78200AVEZ, ISL78201AVEZ offers direct upgrade path with identical pinout and feature set plus enhanced thermal robustness, while MPQ4312-AEC1 trades topology versatility for higher integration and lower BOM count in standard buck-only use cases.
Availability
ISL78200AVEZ is available at Aetrix Electronics and suitable for automotive ADAS camera power, 12 V bus pre-regulation, and start-stop microcontroller supply requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for ISL78200AVEZ 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 acquired Intersil in 2017 and maintains full support for its high-reliability analog power portfolio. Renesas is a global semiconductor leader focused on embedded solutions for automotive, industrial, and IoT markets.
The ISL78200AVEZ belongs to Renesas' automotive-grade power management IC family, engineered specifically for demanding vehicle subsystems requiring AEC-Q100 compliance, wide input range, and fault-resilient operation in under-hood environments.
FAQ
What is the maximum continuous output current capability of the ISL78200AVEZ?
The ISL78200AVEZ delivers 2.5 A continuous output current under defined conditions: 5 V output, 8–36 V input, 500 kHz switching frequency, +85°C ambient temperature, and still-air cooling. Actual current depends on thermal design, board layout, and ambient conditions - die temperature must remain ≤+125°C. The datasheet specifies this rating on page 14 under "Output Current".
Does the ISL78200AVEZ support pre-biased output start-up?
Yes, the ISL78200AVEZ supports pre-biased output start-up, allowing the output capacitor to be pre-charged before enabling the converter. This feature ensures clean, glitch-free power sequencing in systems like automotive infotainment or telematics where multiple rails must coordinate. The functional description on page 13 confirms this capability.
How does the AUXVCC switchover function reduce quiescent current in the ISL78200AVEZ?
The ISL78200AVEZ uses its AUXVCC pin to switch bias supply from the main VIN-referenced LDO to an auxiliary LDO powered by VOUT after startup. Since VOUT is lower than VIN, dropout voltage and internal power dissipation decrease significantly - reducing input quiescent current to 180 µA (vs. 300 µA in standard PFM mode) under 12 V VIN / 5 V VOUT conditions.
Can the ISL78200AVEZ operate in boost-buck topology, and what is the minimum input voltage supported?
Yes, the ISL78200AVEZ supports two-stage boost-buck operation using the EXT_BOOST pin to enable a boost pre-regulator stage. In this mode, it extends the effective input range down to 2.5 V or lower - enabling operation from deeply discharged batteries or low-voltage sources. Typical Application Schematic III (page 5) and Figure 24–26 validate this functionality.
What protection features are implemented in the ISL78200AVEZ?
The ISL78200AVEZ integrates comprehensive protections: cycle-by-cycle overcurrent with frequency foldback and hiccup mode, overvoltage (latching and non-latching), undervoltage lockout, overtemperature shutdown (trip at +155°C, recover at +140°C), and power-good monitoring with 1000-cycle delay. All are hardware-based and fully specified in the Electrical Specifications table (pages 7–9).
ISL78200AVEZ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost, 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
ISL78200AVEZ FAQ
1.How can I place an order for ISL78200AVEZ through Aetrix?
Please submit a Request for Quotation (RFQ) for ISL78200AVEZ 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 ISL78200AVEZ reliable?
The price and inventory of ISL78200AVEZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ISL78200AVEZ is usually 5 days.
3.What payment methods are accepted for ISL78200AVEZ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ISL78200AVEZ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ISL78200AVEZ?
ISL78200AVEZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ISL78200AVEZ 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 ISL78200AVEZ?
For technical support, including ISL78200AVEZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ISL78200AVEZ requirements.
6.How does Aetrix verify that ISL78200AVEZ is sourced from the original manufacturer or authorized distributors?
All ISL78200AVEZ 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 ISL78200AVEZ meets industry standards.
7.What is the process for return or replacement of ISL78200AVEZ?
All ISL78200AVEZ units undergo pre-shipment inspection (PSI). If there is an issue with ISL78200AVEZ, 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 ISL78200AVEZ part is unused and in its original packaging.
Return procedure for ISL78200AVEZ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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