My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX20008AFOC/VY+
- Part No.:
- MAX20008AFOC/VY+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20008AFOC/VY+.pdf
- Description:
- IC REG BUCK 5V 8A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,909
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX20008AFOC/VY+ from Maxim Integrated is an AEC-Q100 qualified, 8A synchronous automotive buck converter with integrated high-side and low-side MOSFETs. It operates from 3.5V to 36V input, delivers programmable 1V–10V or fixed 3.3V/5.0V output, achieves 98% duty-cycle operation, and features 25µA quiescent current in skip mode-enabling robust point-of-load regulation in navigation head units and radio systems.
For engineers reviewing the MAX20008AFOC/VY+ datasheet, MAX20008AFOC/VY+ pinout, MAX20008AFOC/VY+ application, or MAX20008AFOC/VY+ equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade protection features (40V load-dump tolerance, thermal shutdown, short-circuit hiccup), and real-world design meaning for VIN range, soft-start, RESET behavior, and frequency programming.
Technical Context
The MAX20008AFOC/VY+ implements current-mode control with forced-PWM and skip-mode operation selectable via SYNC pin logic level. Its internal 5V BIAS LDO powers analog circuitry and transitions to VOUT post-startup depending on output voltage and trim version-reducing power loss while maintaining regulation integrity during cold-crank transients.
It integrates cycle-by-cycle current limiting, overtemperature shutdown with 15°C hysteresis, and overvoltage protection with rising/falling thresholds at 104–110% and 105% of VOUT respectively. The 17-pin FC2QFN package supports thermal resistance θJA = 27°C/W on a four-layer board, enabling stable 8A continuous operation within -40°C to +125°C ambient when properly laid out.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8A continuous-supports high-power infotainment subsystems without external current boosting |
| Input Voltage Range | 3.5V to 36V-covers full automotive battery range including cold-crank (down to 3.0V after startup) |
| Quiescent Current | 25µA in skip mode-enables always-on functionality in low-power vehicle modules |
| Switching Frequency | 220kHz to 2.2MHz, resistor-programmable-allows EMI optimization and inductor size reduction |
| Output Accuracy | ±2% over line/load/temperature-ensures reliable microcontroller and sensor rail stability |
| Duty Cycle Max | 98% typical-maintains regulation during deep undervoltage events (e.g., engine start) |
| Operating Temp | -40°C to +125°C junction-meets under-hood and dashboard environmental requirements |
| Load-Dump Tolerance | 40V-survives ISO 7637-2 Pulse 5a without external TVS clamping |
Pinout & Package
MAX20008AFOC/VY+ uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad. Pin 1 is OUT; pins 4,5,7,8 are PGND; pin 14 is GND (analog ground); pin 10 is SUP (tied internally to SUPSW); and pin 9 is SUPSW (high-side switch supply).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT (Pin 1) | Regulated output node | Delivers up to 8A; supplies internal circuitry when BIAS switches over post-startup |
| RESET (Pin 2) | Open-drain reset signal | Asserts low when VOUT falls below 89–93% of target; requires external pullup for system reset coordination |
| BST (Pin 3) | Bootstrap capacitor connection | Must connect 0.1µF ceramic between BST and LX to sustain high-side gate drive during 98% duty cycle |
| PGND (Pins 4,5,7,8) | Power ground return | Low-impedance path for LX switching current; must be connected together and tied to thermal pad |
| LX (Pin 6) | Switch node | Connects to inductor; carries full AC switching current up to 8A RMS; critical for EMI layout |
| SUPSW (Pin 9) | High-side FET supply | Bypassed with 0.1µF + 4.7µF ceramics; powers internal switch stage independently of SUP |
| SUP (Pin 10) | Main IC supply | Internally tied to SUPSW; supplies bias regulator and logic-must be routed adjacent to SUPSW |
| EN (Pin 11) | Enable control | Logic-compatible with 3.5V battery; 2.4V threshold enables direct connection to MCU GPIO |
| SYNC (Pin 12) | Mode/frequency control | GND = skip mode; BIAS or external clock = forced-PWM; diode-protected against overvoltage |
| BIAS (Pin 13) | 5V linear regulator output | Supplies internal analog blocks; switches to VOUT post-startup in fixed-output versions to improve efficiency |
| GND (Pin 14) | Analog reference ground | Separate from PGND to minimize noise coupling into FB/COMP/OSC circuits |
| COMP (Pin 15) | Error amplifier output | Connect RC compensation network to GND per design guidelines to ensure loop stability |
| FB (Pin 16) | Voltage feedback input | Connect to resistive divider for adjustable output; tie directly to BIAS for 3.3V/5.0V fixed options |
| FOSC (Pin 17) | Frequency setting input | Resistor-to-GND sets fSW from 220kHz–2.2MHz; enables EMI spread-spectrum when factory-enabled |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual-MOSFET power stage | Eliminates external high-side/low-side drivers and reduces BOM count by ≥4 components |
| Programmable soft-start (5ms fixed) | Prevents inrush current damage to input capacitors and downstream loads during ignition cycling |
| 98% max duty cycle with dropout recovery | Maintains regulated output during 6V cold-crank transients without requiring larger input capacitors |
| AEC-Q100 Grade-1 qualification | Validated for automotive production use across -40°C to +125°C ambient with zero early-life failure data |
| 40V load-dump tolerance | Withstands ISO 7637-2 Pulse 5a without external protection-reducing PCB area and cost |
| Spread-spectrum option (factory enabled) | Reduces peak EMI by ±3% frequency modulation-simplifies compliance testing for CISPR 25 Class 5 |
Applications
| Navigation Head Unit Power | Radio System PoL Regulation |
|---|---|
Use Scenario: Supplies 5.0V/3.3V rails to display controller, audio DSP, and RF front-end in automotive infotainment head units. IC Role / Device Role / Timing Role: Primary step-down converter delivering stable 8A output with fast transient response to dynamic CPU/GPU load changes. Use Value: Maintains regulation during engine cranking (6V input) via 98% duty cycle, preventing system brownouts and display flicker. |
Use Scenario: Powers AM/FM tuner, Bluetooth module, and digital signal processor in OEM car radios. IC Role / Device Role / Timing Role: High-efficiency PoL regulator operating in skip mode during standby to meet <50µA system sleep budget. Use Value: 25µA quiescent current extends battery life in key-off monitoring states without compromising wake-up latency. |
| ADAS Camera Module Supply | Telematics Control Unit (TCU) Core Rail |
Use Scenario: Provides clean 3.3V core supply to image sensor and ISP in rear-view or surround-view camera ECUs. IC Role / Device Role / Timing Role: Automotive-grade DC-DC with RESET output used for sensor initialization sequencing and fault detection. Use Value: ±2% output accuracy ensures consistent ADC reference and pixel gain calibration across temperature extremes. |
Use Scenario: Generates 1.2V/1.8V core voltage for cellular modem and application processor in 4G/5G telematics gateways. IC Role / Device Role / Timing Role: Synchronous buck with programmable frequency synchronized to system clock to avoid beat-frequency interference. Use Value: 220kHz–2.2MHz resistor-programmable switching allows EMI notch placement away from LTE bands (700MHz/1.8GHz). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | 4.5V–36V input, 8A, 2.1MHz max fSW, no integrated BIAS LDO, requires external bootstrap cap | Lacks integrated 5V BIAS regulator and automatic switchover-increases external component count and layout complexity | Choose when higher switching frequency (>2.2MHz) is required and BIAS integration is not needed |
| TPS546B24A | 4.5V–18V input, 12A, PMBus interface, 500kHz–2.2MHz fSW, no AEC-Q100 Grade-1 rating | Wider output current range but narrower VIN range; lacks automotive qualification and load-dump tolerance | Prefer for non-automotive industrial servers where digital control and higher current outweigh qualification needs |
Compared with LM61480-Q1 and TPS546B24A, the MAX20008AFOC/VY+ uniquely combines AEC-Q100 Grade-1, 40V load-dump tolerance, integrated BIAS LDO with switchover, and 3.5V minimum input-making it the only drop-in solution for demanding automotive PoL applications requiring cold-crank resilience and minimal external components.
Availability
MAX20008AFOC/VY+ is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, telematics control units, and radio head units requiring stable component supply across extended temperature and qualification requirements.
Supply support for MAX20008AFOC/VY+ 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX20008 belongs to Maxim's automotive power management portfolio, engineered specifically for high-reliability point-of-load conversion in harsh environments-including navigation systems, radio head units, and ADAS sensors.
FAQ
What is the maximum continuous output current of the MAX20008AFOC/VY+?
The MAX20008AFOC/VY+ delivers up to 8A continuous output current under proper thermal conditions-verified by its LX current limit specification of 10.5A (min), 14A (typ), and 17.5A (max) in the datasheet. This rating assumes adequate PCB copper area, four-layer board construction, and ambient temperature ≤70°C. Derating applies above 70°C at 29.4mW/°C.
Does the MAX20008AFOC/VY+ support fixed 5.0V and 3.3V outputs without external resistors?
Yes-the MAX20008AFOC/VY+ supports factory-trimmed fixed 5.0V and 3.3V outputs. To enable either, connect the FB pin directly to the BIAS pin. No external resistor divider is required. Output accuracy remains ±2% over line, load, and temperature, and the device retains all protection features including RESET assertion and overtemperature shutdown.
How does the RESET output of the MAX20008AFOC/VY+ behave during power-up and fault conditions?
The MAX20008AFOC/VY+ RESET output is an open-drain, active-low signal that asserts low when VOUT falls below 89–93% of its target (UV threshold) and deasserts after VOUT rises above 104–110% (OV threshold) plus a 0.2ms hold time. During startup, RESET remains low until VOUT reaches regulation and stabilizes-providing clean system reset timing for connected microcontrollers.
Can the MAX20008AFOC/VY+ operate with input voltage below 3.5V?
The MAX20008AFOC/VY+ specifies a minimum operating input voltage of 3.5V, but supports 3.0V after startup during cold-crank events. Below 3.5V, the device enters high-duty-cycle mode to maintain regulation-leveraging its 98% max duty cycle. However, startup will not initiate below 3.5V; EN must be asserted only when VIN ≥3.5V to guarantee reliable boot.
What is the purpose of the BIAS pin on the MAX20008AFOC/VY+, and how does it behave in different modes?
The BIAS pin on the MAX20008AFOC/VY+ provides a regulated 5V output to power internal analog circuitry. After startup, it automatically switches to VOUT in fixed-output versions-reducing power loss. In skip mode with light load, BIAS transitions to VOUT only if the IC is factory-trimmed for 3.3V; 5V-trimmed versions switch regardless of load. BIAS must remain between 2.8V and 5.6V for switchover to occur.
MAX20008AFOC/VY+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 8A
- Frequency - Switching:
- 220kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 17-FC2QFN (3.5x3.75)
MAX20008AFOC/VY+ FAQ
1.How can I place an order for MAX20008AFOC/VY+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20008AFOC/VY+ 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 MAX20008AFOC/VY+ reliable?
The price and inventory of MAX20008AFOC/VY+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20008AFOC/VY+ is usually 5 days.
3.What payment methods are accepted for MAX20008AFOC/VY+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20008AFOC/VY+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20008AFOC/VY+?
MAX20008AFOC/VY+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20008AFOC/VY+ 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 MAX20008AFOC/VY+?
For technical support, including MAX20008AFOC/VY+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20008AFOC/VY+ requirements.
6.How does Aetrix verify that MAX20008AFOC/VY+ is sourced from the original manufacturer or authorized distributors?
All MAX20008AFOC/VY+ 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 MAX20008AFOC/VY+ meets industry standards.
7.What is the process for return or replacement of MAX20008AFOC/VY+?
All MAX20008AFOC/VY+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX20008AFOC/VY+, 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 MAX20008AFOC/VY+ part is unused and in its original packaging.
Return procedure for MAX20008AFOC/VY+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX20008AFOC/VY+ Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
