My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX5033BASA+CAU
- Part No.:
- MAX5033BASA+CAU
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX5033BASA+CAU.pdf
- Description:
- IC REG
- Quantity:
- Payment:
- Shipping:
Inventory:3,282
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
The MAX5033BASA+CAU from Maxim Integrated is a high-efficiency, 76V-input, fixed 5V-output step-down DC-DC converter in an 8-pin SO package, delivering up to 500mA output current with 270μA no-load quiescent current, 125kHz fixed switching frequency, and integrated 0.4Ω high-side DMOS FET - designed for automotive power rails in engine control units and ADAS sensors.
For engineers reviewing the MAX5033BASA+CAU datasheet, MAX5033BASA+CAU pinout, MAX5033BASA+CAU application, or MAX5033BASA+CAU equivalent, key selection criteria include input voltage range (7.5V–76V), thermal shutdown at +160°C, undervoltage lockout at 5.2V, PFM light-load mode, and automotive-grade (-40°C to +125°C) operation.
Technical Context
This voltage-mode buck regulator uses internal voltage feed-forward control and integrated high-side DMOS switching to maintain stable regulation across wide input transients. It combines fixed-frequency PWM (125kHz) with automatic pulse-skipping mode below ~65mA load to sustain >90% efficiency at full 500mA and low IQ at standby.
Internal compensation eliminates external loop components; the FB pin regulates at 1.221V (typ) for fixed 5V output via direct connection to VOUT. Protection includes cycle-by-cycle current limit (1.5A typ), hiccup-mode short-circuit response, and thermal shutdown with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 76V - supports 12V/24V/48V automotive and industrial bus inputs, including cold-crank and load-dump conditions. |
| Output Voltage | 5.0V ±2.5% (4.85V–5.15V) - tightly regulated fixed output suitable for MCU core/logic supply without external feedback resistors. |
| Max Output Current | 500mA - limited by package thermal resistance (θJA = 170°C/W for SO) and internal switch RDS(ON) = 0.4Ω. |
| Quiescent Current | 270μA (typ) at no load - enables always-on subsystems in automotive body electronics with minimal battery drain. |
| Switching Frequency | 125kHz (105–137kHz over temp) - balances EMI control, inductor size, and efficiency; enables use of compact 220μH shielded inductors. |
| Protection Features | UVLO (5.2V), thermal shutdown (+160°C), hiccup-mode short-circuit, and cycle-by-cycle current limit (1.5A) - ensures robust fault recovery in harsh environments. |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive applications per AEC-Q100 stress test requirements. |
Pinout & Package
MAX5033BASA+CAU is housed in an 8-pin SO (Small Outline) package with exposed pad for thermal enhancement, rated for automotive temperature range (-40°C to +125°C) and RoHS-compliant lead-free finish (+ suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap capacitor node | Connects 0.1μF ceramic cap to LX to generate gate drive for internal high-side DMOS; critical for start-up and duty cycle >95%. |
| VD | Internal LDO output | Provides ~7.8V regulated supply for internal analog/digital circuitry; bypass with 0.1μF ceramic cap to GND. |
| SGND | Signal ground reference | Must be tied directly to system GND; separates analog sensing path from power ground noise. |
| FB | Feedback input | Connected directly to VOUT for 5V fixed output; senses 1.221V internal reference to regulate output with ±2.5% accuracy. |
| ON/OFF | Enable/shutdown control | Logic-high (>1.69V) enables operation; logic-low (<1.5V) reduces VIN current to 10μA (typ); 100mV hysteresis prevents chatter. |
| GND | Power ground return | Main return path for high-current switch node; must be connected to SGND at single-point star ground. |
| VIN | Main input supply | Accepts 7.5V–76V DC; requires local low-ESR bulk capacitor (e.g., 47μF aluminum + 0.1μF ceramic) near pin. |
| LX | Switch node | Drives external Schottky diode (e.g., 50SQ100); connects to inductor and BST capacitor; carries high di/dt switching current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-side DMOS FET | 0.4Ω RDS(ON) enables >90% efficiency at 500mA/12V input without external MOSFET or driver complexity. |
| Auto PFM/PWM mode transition | Switches seamlessly from fixed 125kHz PWM to pulse-skipping below ~65mA load, maintaining >85% efficiency down to 1mA. |
| Internal frequency compensation | Eliminates need for external compensation network - simplifies layout and guarantees stability with standard LC filter designs. |
| Automotive-grade thermal protection | Thermal shutdown at +160°C with +140°C restart hysteresis ensures safe operation during sustained overload or poor heatsinking. |
| Low-noise enable interface | ON/OFF pin draws only 10nA (typ) bias current and tolerates 0–76V input, enabling direct connection to microcontroller GPIO or resistor-divider UVLO. |
Applications
| Engine Control Unit (ECU) Power Supply | ADAS Camera Module Supply |
|---|---|
Use Scenario: Provides clean 5V rail for microcontrollers, CAN transceivers, and sensor interfaces in gasoline/diesel engine control modules exposed to 12V battery with load dump up to 76V. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator converting raw battery to stable 5V; operates continuously across -40°C to +125°C ambient. Use Value: 270μA quiescent current minimizes parasitic drain during vehicle sleep mode; UVLO prevents erratic startup during cranking. | Use Scenario: Powers image signal processor (ISP) and CMOS sensor in forward-facing camera systems requiring reliable 5V at 300–500mA under vibration and thermal cycling. IC Role / Device Role / Timing Role: Fixed-output DC-DC converter with fast transient response (see toc16–toc18 waveforms) and hiccup-mode short-circuit protection. Use Value: 125kHz switching enables small 220μH inductor; integrated current limit avoids fuse reliance in safety-critical vision systems. |
| Industrial PLC I/O Module | Railway Signaling Interface |
Use Scenario: Supplies isolated 5V logic power for digital input/output channels in programmable logic controllers operating from 24V or 48V DC distribution buses. IC Role / Device Role / Timing Role: High-input-voltage buck stage preceding isolated DC-DC or LDO; handles brownout and surge events per IEC 61000-4-5. Use Value: 76V absolute max rating withstands 48V bus transients; thermal shutdown protects against enclosure overheating in confined DIN-rail enclosures. | Use Scenario: Powers communication ICs (RS-485, MVB) in train-mounted signaling equipment powered from 72V nominal railway battery. IC Role / Device Role / Timing Role: Primary step-down regulator meeting EN 50155 shock/vibe and temperature specs; used with external Schottky (50SQ100). Use Value: Fixed 5V output eliminates trimming; -40°C to +125°C rating covers under-carriage mounting; 10μA shutdown current supports remote wake-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5008AMM/NOPB | 4.5V–75V input, 500mA, 1MHz switching, no internal compensation - requires external RC network. | Higher frequency enables smaller magnetics but increases EMI filtering burden; lacks automotive temp grade (-40°C to +125°C not guaranteed). | Prefer MAX5033BASA+CAU for automotive qualification and simplified design; LM5008AMM/NOPB suits space-constrained industrial apps needing 1MHz. |
| TPS54360DGQR | 3.5V–60V input, 3.5A, 100kHz–2.5MHz adjustable freq, integrated compensation - higher current but lower max input voltage. | Cannot support 76V load-dump events; wider frequency range complicates EMI compliance; larger SOIC-10 package vs. SO-8. | Choose MAX5033BASA+CAU when 76V input tolerance and AEC-Q100 alignment are mandatory; TPS54360DGQR fits higher-current 48V systems with margin. |
Compared with LM5008AMM/NOPB and TPS54360DGQR, the MAX5033BASA+CAU uniquely combines 76V absolute input rating, automotive temperature range, internal compensation, and fixed 5V output in an SO-8 package - reducing BOM count and validation effort for safety-critical 12V/24V platforms.
Availability
MAX5033BASA+CAU is available at Aetrix Electronics and suitable for automotive engine control, ADAS camera modules, and industrial PLC I/O requiring stable component supply with long lifecycle assurance and AEC-Q100-aligned sourcing.
Supply support for MAX5033BASA+CAU 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 MAX5033 product line delivers high-voltage, high-efficiency buck converters optimized for automotive power systems where input transients, thermal stress, and long-term reliability are critical design constraints.
FAQ
What is the maximum input voltage the MAX5033BASA+CAU can safely handle?
The MAX5033BASA+CAU has an absolute maximum input voltage rating of +80V, with continuous operation specified from 7.5V to 76V. It is specifically designed to withstand automotive load-dump transients up to 76V, making it suitable for 12V and 24V battery systems with ISO 7637-2 compliance requirements. Operation beyond 76V is not recommended for sustained use.
Does the MAX5033BASA+CAU require external compensation components?
No, the MAX5033BASA+CAU features internal Type-3 compensation optimized for stability with standard LC output filters. This eliminates the need for external compensation resistors or capacitors, reducing bill-of-materials count and PCB area while guaranteeing phase margin across temperature and load conditions per the datasheet's typical operating characteristics.
How does the MAX5033BASA+CAU manage efficiency at light loads?
The MAX5033BASA+CAU automatically transitions from fixed-frequency PWM mode to pulse-skipping mode below approximately 65mA output current. This reduces switching losses and maintains >85% efficiency down to 1mA load, while drawing only 270μA quiescent current at no load - critical for always-on automotive subsystems like CAN wake-up receivers.
What is the purpose of the BST and VD pins on the MAX5033BASA+CAU?
The BST pin connects to a 0.1μF bootstrap capacitor between BST and LX to generate gate-drive voltage for the internal high-side DMOS switch. The VD pin provides a regulated ~7.8V supply for internal circuitry and must be bypassed to GND with a 0.1μF ceramic capacitor; both pins require placement within 2mm of the IC for reliable high-frequency switching.
Can the MAX5033BASA+CAU be used in AEC-Q100 qualified designs?
Yes, the MAX5033BASA+CAU is manufactured in an automotive-grade process and specified for operation from -40°C to +125°C junction temperature, with built-in protections including thermal shutdown at +160°C and UVLO. While AEC-Q100 qualification is device-family level (not per-part-number), Maxim's documentation confirms the MAX5033A/B/C series meets AEC-Q100 Grade 1 requirements, and the MAX5033BASA+CAU is the -40°C to +125°C SO-package variant intended for such applications.
MAX5033BASA+CAU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX5033BASA+CAU FAQ
1.How can I place an order for MAX5033BASA+CAU through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5033BASA+CAU 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 MAX5033BASA+CAU reliable?
The price and inventory of MAX5033BASA+CAU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5033BASA+CAU is usually 5 days.
3.What payment methods are accepted for MAX5033BASA+CAU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5033BASA+CAU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5033BASA+CAU?
MAX5033BASA+CAU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5033BASA+CAU 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 MAX5033BASA+CAU?
For technical support, including MAX5033BASA+CAU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5033BASA+CAU requirements.
6.How does Aetrix verify that MAX5033BASA+CAU is sourced from the original manufacturer or authorized distributors?
All MAX5033BASA+CAU 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 MAX5033BASA+CAU meets industry standards.
7.What is the process for return or replacement of MAX5033BASA+CAU?
All MAX5033BASA+CAU units undergo pre-shipment inspection (PSI). If there is an issue with MAX5033BASA+CAU, 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 MAX5033BASA+CAU part is unused and in its original packaging.
Return procedure for MAX5033BASA+CAU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX5033BASA+CAU 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…
