My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX20004AFOB/VY+T
- Part No.:
- MAX20004AFOB/VY+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 17-PowerWFQFN
- Datasheet:
-
MAX20004AFOB/VY+T.pdf
- Description:
- IC REG BUCK 3.3V 4A 17FC2QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,534
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX20004AFOB/VY+T from Maxim Integrated is a 4A, AEC-Q100 qualified automotive synchronous buck converter with integrated high-side and low-side MOSFETs, 3.5V–36V input range, 25µA no-load quiescent current, and 98% maximum duty cycle for cold-crank operation - used in navigation head units and PoL regulation.
For engineers reviewing the MAX20004AFOB/VY+T datasheet, MAX20004AFOB/VY+T pinout, MAX20004AFOB/VY+T application, or MAX20004AFOB/VY+T equivalent, this page delivers verified technical context, validated pin functions, confirmed automotive-grade protection features, and real-world design constraints including spread-spectrum EMI reduction and BIAS switchover behavior.
Technical Context
The MAX20004AFOB/VY+T implements current-mode control with resistor-programmable switching frequency (220kHz–2.2MHz), supports both forced-PWM and skip modes, and integrates thermal shutdown (175°C) with 15°C hysteresis plus cycle-by-cycle current limiting up to 8.75A peak LX current.
It features dual supply inputs (SUP/SUPSW), a 5V BIAS LDO that switches to VOUT post-startup in fixed-5V variants, open-drain RESET with 89–93% UV threshold and 0.2ms hold time, and SYNC-controlled mode selection enabling external clock synchronization within ±20% of internal fSW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current Rating | 4A continuous (MAX20004 variant); supports 8.75A peak LX current for transient overload handling |
| Input Voltage Range | 3.5V–36V; operates down to 3.0V after startup, enabling cold-crank resilience in 12V automotive systems |
| Quiescent Current | 25µA typical in skip mode at no load - critical for always-on modules meeting ISO 16750-2 sleep current requirements |
| Output Voltage Options | Factory-trimmed 5.0V ±2% or 3.3V ±2%; adjustable 1V–10V via FB resistive divider with 1.00V ±1% feedback reference |
| Switching Frequency | Resistor-programmable 220kHz–2.2MHz; enables optimization between inductor size (higher fSW) and efficiency (lower fSW) |
| Duty Cycle Limit | 98% typical maximum - sustains regulation during deep undervoltage transients without dropout |
| Protection Features | Overtemperature shutdown (175°C), short-circuit hiccup mode, overvoltage lockout (104–110%), and 40V load-dump tolerance |
Pinout & Package
MAX20004AFOB/VY+T uses a 3.5mm × 3.75mm, 17-pin FC2QFN package with exposed thermal pad (pin 14 = GND). All PGND pins (4,5,7,8) must be connected to a common low-impedance ground plane for thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OUT | Regulated output node | Delivers final DC voltage; also powers internal circuitry when BIAS switchover occurs |
| 2 RESET | Open-drain reset signal | Asserts low when VOUT falls below 89–93% of target; requires external pullup for system reset coordination |
| 3 BST | Bootstrap supply for high-side gate driver | Must be decoupled with 0.1µF capacitor to LX; enables 100% duty-cycle capability |
| 4,5,7,8 PGND | Power ground return | Low-impedance path for high-current switch node return; critical for thermal dissipation and noise control |
| 6 LX | Switch node connection | Connects to inductor; carries full switching current (up to 8.75A peak); layout must minimize loop area |
| 9 SUPSW | High-side switch supply input | Provides power to internal FETs; bypassed with 0.1µF + 4.7µF ceramics close to pin |
| 10 SUP | Main IC supply input | Internally tied to SUPSW; connects directly to SUPSW externally for optimal cold-crank start |
| 11 EN | Enable control input | Logic-compatible enable; requires VSUP > 7.5V before toggling high for safe startup |
| 12 SYNC | Mode/frequency control input | GND = skip mode; BIAS/external clock = FPWM; diode-protected to prevent overvoltage from external sources |
| 13 BIAS | Linear regulator output | 5V LDO output; switches to VOUT post-startup in 5V variants to improve light-load efficiency |
| 14 GND | Analog ground reference | Separate from PGND; connects to quiet analog ground plane to stabilize feedback and compensation |
| 15 COMP | Error amplifier output | Connects RC network to GND for loop stability; sets bandwidth and phase margin per application conditions |
| 16 FB | Feedback input | 1.00V ±1% reference point; connect to BIAS for fixed 5V/3.3V or to resistive divider for adjustable output |
| 17 FOSC | Frequency setting input | Resistor-to-GND sets fSW; 73.2kΩ → ~400kHz, 12kΩ → ~2.2MHz; enables EMI tuning via spread spectrum |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side MOSFETs | Eliminates external power stage components; RHS = 38–76mΩ / RLS = 18–36mΩ reduces conduction loss and board space |
| AEC-Q100 Grade-1 qualification | Validated for -40°C to +125°C operation with 40V load-dump tolerance - meets automotive OEM stress test requirements |
| Spread-spectrum switching (factory option) | ±3% frequency modulation centered on fOSC reduces peak EMI by >10dB, easing CISPR 25 Class 5 compliance |
| Fixed 5ms soft-start | Prevents inrush current damage to input capacitors and upstream power sources during cold-start sequences |
| RESET with programmable UV/OV thresholds | Enables system-level power sequencing and fault reporting without external supervisor ICs |
| BIAS switchover logic | Automatically transitions BIAS from 5V to VOUT after startup in 5V variants - improves light-load efficiency by 5–8% |
Applications
| Navigation Head Units | ADAS Camera Power Rails |
|---|---|
Use Scenario: Powering display controllers, SoCs, and touch interfaces in infotainment head units subject to 12V battery transients. IC Role / Device Role / Timing Role: Primary 5V PoL regulator delivering stable voltage despite cold-crank (4.5V) and load-dump (40V) events. Use Value: 98% duty cycle and 40V tolerance eliminate need for pre-regulator stages; AEC-Q100 ensures field reliability over 15-year vehicle life. |
Use Scenario: Supplying image sensor and ISP cores in rear-view or surround-view cameras requiring low-noise, ripple-free 3.3V rails. IC Role / Device Role / Timing Role: Fixed 3.3V buck converter operating in FPWM mode to suppress switching noise near analog video paths. Use Value: ±2% output accuracy and <10mVPP ripple (at 2.2MHz) prevent image artifacts; SYNC pin enables deterministic noise placement. |
| Body Control Modules (BCM) | Telematics Control Units (TCU) |
Use Scenario: Regulating power for microcontrollers, CAN transceivers, and LIN interfaces in door modules and seat controllers. IC Role / Device Role / Timing Role: Always-on 3.3V supply with 25µA skip-mode quiescent current meeting ISO 16750-2 Class D sleep current limits. Use Value: Ultra-low IQ extends battery runtime during extended parking; RESET output signals MCU wake-up on valid VOUT restoration. |
Use Scenario: Providing 5V rail for cellular modems, GNSS receivers, and Ethernet PHYs in connected vehicle gateways. IC Role / Device Role / Timing Role: High-efficiency 5V buck converter synchronized to system clock to avoid beat frequencies with RF bands. Use Value: External SYNC capability eliminates EMI coupling into LTE/5G receive bands; thermal shutdown protects against enclosure overheating. |
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 | 4A rating, 3.3V–36V input, 15µA IQ, but no spread-spectrum or BIAS switchover; uses different compensation scheme | Preferred where lowest IQ dominates over EMI; lacks RESET and requires external supervisor for sequencing | Select when minimizing sleep current is primary; verify loop stability with LM61480's Type II vs MAX20004's Type III compensation |
| TPS54560-Q1 | 5A rating, 3.5V–60V input, 125µA IQ, no integrated low-side FET; requires external bootstrap diode and higher BOM count | Better for wide-VIN industrial use; unsuitable for space-constrained automotive modules due to discrete FET requirement | Choose only if 60V input range is mandatory; MAX20004AFOB/VY+T offers superior integration and lower EMI in compact layouts |
Compared with LM61480-Q1 and TPS54560-Q1, MAX20004AFOB/VY+T delivers tighter output accuracy (±2% vs ±3%), lower no-load IQ than TPS54560-Q1, and unique features like BIAS switchover and factory-enabled spread-spectrum - making it optimal for EMI-sensitive, space-constrained automotive PoL designs.
Availability
MAX20004AFOB/VY+T is available at Aetrix Electronics and suitable for automotive navigation systems, ADAS camera modules, and body control units requiring stable component supply across long production lifecycles and stringent environmental qualification.
Supply support for MAX20004AFOB/VY+T 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 MAX20004 series belongs to Maxim's automotive power management portfolio, engineered specifically for AEC-Q100-compliant step-down conversion in harsh environments - emphasizing cold-crank resilience, EMI robustness, and functional safety readiness.
FAQ
What is the maximum continuous output current of the MAX20004AFOB/VY+T?
The MAX20004AFOB/VY+T is rated for 4A continuous output current under typical thermal conditions (θJA = 27°C/W, TA = +70°C). Peak LX current capability is 8.75A, supporting transient loads. Actual achievable current depends on PCB layout, ambient temperature, switching frequency, and heatsinking - refer to the "Typical Operating Characteristics" plots in the datasheet for derating guidance specific to your design.
Does the MAX20004AFOB/VY+T support adjustable output voltage?
Yes, the MAX20004AFOB/VY+T supports adjustable output voltage from 1V to 10V using an external resistive divider connected to the FB pin. For fixed outputs, connect FB directly to BIAS to select factory-trimmed 5.0V or 3.3V. The feedback reference voltage is tightly regulated at 1.00V ±1%, enabling precise output programming with standard resistor tolerances.
How does the BIAS pin function in the MAX20004AFOB/VY+T?
The BIAS pin on the MAX20004AFOB/VY+T is a 5V linear regulator output that powers internal circuitry. In 5V-fixed variants, BIAS automatically switches to VOUT after startup to improve light-load efficiency. It remains active during normal operation and must be bypassed with ≥2.2µF ceramic capacitance to GND. BIAS switchover only occurs when VOUT is between 2.8V and 5.6V.
Can the MAX20004AFOB/VY+T be synchronized to an external clock?
Yes, the MAX20004AFOB/VY+T supports external clock synchronization via the SYNC pin. Driving SYNC with a logic-level clock (≤ BIAS or VOUT voltage) enables forced-PWM mode and locks switching to the external source within ±20% frequency deviation. The device synchronizes within two cycles and reverts to internal oscillation if SYNC is inactive for >2 cycles.
What protection features are integrated into the MAX20004AFOB/VY+T?
The MAX20004AFOB/VY+T integrates overtemperature shutdown (175°C with 15°C hysteresis), cycle-by-cycle current limiting (8.75A peak), overvoltage lockout (104–110% VOUT rising threshold), undervoltage reset (89–93% falling threshold), short-circuit hiccup mode, and 40V load-dump tolerance - all validated per AEC-Q100 Grade-1 requirements for automotive deployment.
MAX20004AFOB/VY+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 17-PowerWFQFN
- Packaging:
- Tape & Reel (TR)
- 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 4A
- 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)
MAX20004AFOB/VY+T FAQ
1.How can I place an order for MAX20004AFOB/VY+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX20004AFOB/VY+T 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 MAX20004AFOB/VY+T reliable?
The price and inventory of MAX20004AFOB/VY+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX20004AFOB/VY+T is usually 5 days.
3.What payment methods are accepted for MAX20004AFOB/VY+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX20004AFOB/VY+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX20004AFOB/VY+T?
MAX20004AFOB/VY+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX20004AFOB/VY+T 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 MAX20004AFOB/VY+T?
For technical support, including MAX20004AFOB/VY+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX20004AFOB/VY+T requirements.
6.How does Aetrix verify that MAX20004AFOB/VY+T is sourced from the original manufacturer or authorized distributors?
All MAX20004AFOB/VY+T 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 MAX20004AFOB/VY+T meets industry standards.
7.What is the process for return or replacement of MAX20004AFOB/VY+T?
All MAX20004AFOB/VY+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX20004AFOB/VY+T, 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 MAX20004AFOB/VY+T part is unused and in its original packaging.
Return procedure for MAX20004AFOB/VY+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX20004AFOB/VY+T 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…
