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Analog Devices Inc./Maxim Integrated MAX5082ATE+
- Part No.:
- MAX5082ATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX5082ATE+.pdf
- Description:
- IC REG BUCK ADJ 1.5A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:128
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Product details
Overview
MAX5082ATE+ from Maxim Integrated is a 250kHz voltage-mode step-down DC-DC converter with an integrated 0.3Ω high-side MOSFET, supporting 4.5V–40V input and delivering up to 1.5A at adjustable 1.23V–32V output. It features external compensation, pulse-skip mode for light-load efficiency, and operates across –40°C to +125°C in industrial power supplies.
For engineers reviewing the MAX5082ATE+ datasheet, MAX5082ATE+ pinout, MAX5082ATE+ application, or MAX5082ATE+ equivalent, key selection factors include its 4.5V minimum input capability (vs. MAX5083's 7.5V), internal charge pump architecture, 1.228V FB reference tolerance, thermal shutdown at +160°C, and TQFN-EP package thermal performance (θJC = 1.7°C/W).
Technical Context
The MAX5082ATE+ implements voltage-mode PWM control with a fixed 250kHz oscillator (±25kHz over temperature) and supports external synchronization from 150kHz to 350kHz via SYNC. Its error amplifier delivers 80dB open-loop gain and 1.8MHz unity-gain bandwidth, enabling stable loop compensation across diverse L/C combinations.
It integrates a dedicated charge pump (C+/C− pins) to generate boosted gate drive for the high-side switch-enabling operation down to 4.5V input-alongside cycle-by-cycle current limiting (2.7A typ), hiccup-mode short-circuit protection (4 consecutive ILIM events), and programmable UVLO via ON/OFF pin (1.23V threshold, 0.12V hysteresis).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V - enables direct connection to 5V, 12V, 24V, and 36V industrial rails without pre-regulation |
| Output Current | 1.5A continuous - sufficient for powering FPGAs, microcontrollers, and analog subsystems from single-stage conversion |
| Switching Frequency | 250kHz fixed (±10%) - balances EMI, inductor size, and efficiency; synchronizable to external clock |
| FB Regulation Voltage | 1.228V ±12mV - sets output accuracy; used with resistive divider to configure VOUT from 1.23V to 32V |
| High-Side RDS(on) | 0.3Ω max at VBST–VLX = 6V - limits conduction loss at 1.5A load (≤0.675W dissipation) |
| Thermal Shutdown | +160°C with 20°C hysteresis - protects against sustained overload or poor heatsinking in enclosed environments |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial motor drives, and outdoor telecom equipment |
Pinout & Package
MAX5082ATE+ is housed in a 5mm × 5mm, 16-pin TQFN package with exposed pad (EP) thermally connected to SGND. The package supports 2.7W continuous power dissipation at TA = +70°C (derated 33.3mW/°C above), with θJA = 30°C/W and θJC = 1.7°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (COMP) | Error amplifier output | Connects to external RC network for loop compensation; determines stability and transient response |
| 2 (FB) | Feedback regulation node | Senses output voltage via resistor divider; regulates to 1.228V reference for precise VOUT setting |
| 3 (ON/OFF) | Enable & external UVLO control | 1.23V rising threshold enables sequencing; resistive divider from IN sets custom startup voltage |
| 4 (SS) | Soft-start timing & reference | 15µA current source charges external capacitor; controls ramp rate of output voltage during startup |
| 5 (SYNC) | Oscillator synchronization input | Accepts 150–350kHz external clock; eliminates beat frequencies in multi-converter systems |
| 6 (DVREG) | High-side gate driver supply | Connected to REG; powers bootstrap circuitry for NMOS high-side switch turn-on |
| 7 (C+), 8 (C−) | Charge-pump flying capacitor terminals | Enable low-VIN operation (≥4.5V); require 0.1µF ceramic CF capacitor between C+ and C− |
| 9 (PGND) | Power ground return | Carries high di/dt switching currents; must be tied to SGND at single point near input capacitor |
| 10 (BST) | Bootstrap capacitor connection | Drives high-side gate; requires CBST capacitor (≥0.1µF ceramic) between BST and LX |
| 11–12 (LX) | Switch node | Connects to inductor and freewheeling diode anode; carries pulsed high-current waveform |
| 13–14 (IN) | Main power input | Accepts 4.5–40V unregulated input; feeds internal regulator (REG) and high-side switch |
| 15 (REG) | Internal 5V LDO output | Powers internal circuitry; bypassed with ≥1µF ceramic cap; not intended for external loads |
| 16 (SGND) | Signal ground reference | Analog reference for FB, COMP, SS; solder EP to large SGND plane for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode control architecture | Provides inherent noise immunity in high-voltage switching environments and simplifies loop compensation vs. current-mode |
| Integrated 0.3Ω high-side MOSFET | Eliminates external switch and driver, reducing BOM count and layout complexity for compact 1.5A buck designs |
| Internal charge pump (C+/C−) | Enables reliable start-up and operation down to 4.5V input-critical for battery-backed or wide-input industrial systems |
| Pulse-skip (PFM) light-load mode | Reduces no-load supply current to 1.4mA typical, improving efficiency at <10% load without audible switching noise |
| Programmable undervoltage lockout | Allows precise power-rail sequencing via ON/OFF pin divider-prevents erratic behavior during brownout or hot-plug events |
| Hiccup-mode short-circuit protection | Shuts down for 512 clock cycles after four consecutive current-limit events, preventing thermal runaway during sustained fault conditions |
Applications
| Industrial Motor Control Power | FireWire® Power Supply |
|---|---|
Use Scenario: Powers gate drivers, position sensors, and MCU cores in servo drives operating from 24V or 36V bus rails. IC Role / Device Role / Timing Role: Primary non-isolated buck regulator delivering regulated 5V/3.3V from unregulated DC bus. Use Value: 4.5V–40V input range accommodates wide bus fluctuations; 1.5A output supports multiple downstream rails via LDOs. |
Use Scenario: Generates +12V and +5V outputs for IEEE 1394 (FireWire) interface cards in desktop PCs and audio workstations. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC-DC stage replacing linear regulators to meet FireWire power delivery specs. Use Value: Pulse-skip mode maintains >85% efficiency at standby load; 250kHz switching avoids interference with 400Mbps data signaling. |
| Distributed Power Architecture | Automotive Body Control Module |
Use Scenario: Local point-of-load conversion in telecom shelf systems where 48V backplane supplies multiple 3.3V/5V/12V sub-systems. IC Role / Device Role / Timing Role: Secondary buck converter receiving intermediate 12V rail, stepping down to 3.3V for FPGA I/O banks. Use Value: External synchronization (SYNC) allows alignment with system clock tree to suppress conducted EMI peaks. |
Use Scenario: Supplies 5V to microcontroller, CAN transceiver, and sensor interfaces in under-dash BCM units exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Main power IC handling cold-crank (4.5V) to load-dump (40V) transients per ISO 7637-2. Use Value: –40°C to +125°C rating and thermal shutdown ensure reliability; UVLO hysteresis prevents chattering during cranking. |
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 |
|---|---|---|---|
| MAX5083ATE+ | Higher 7.5V minimum input; no internal charge pump (C+/C− pins omitted); 8V REG output vs. 5V | Suitable where input never drops below 7.5V (e.g., 12V/24V-only systems); eliminates flying capacitor components | Select MAX5083ATE+ when 4.5V operation is unnecessary and board space must be minimized by removing CF/CBST |
| LM5164QDDARQ1 | Automotive-grade (AEC-Q100); wider 4.5V–65V input; 1.5A; integrated boot diode; no charge pump | Designed for automotive front-end power with enhanced ESD/EMI robustness; lacks C+/C− but includes spread-spectrum | Choose LM5164QDDARQ1 for automotive applications requiring AEC-Q100 qualification and >40V surge tolerance |
Compared with MAX5083ATE+, the MAX5082ATE+ provides unique 4.5V start-up capability via its charge pump, while LM5164QDDARQ1 offers automotive qualification and higher input voltage margin-but neither replicates the MAX5082ATE+'s combination of ultra-low-VIN support, thermal robustness, and industrial temperature range in a 16-pin TQFN.
Availability
MAX5082ATE+ is available at Aetrix Electronics and suitable for industrial motor control, distributed power architecture, FireWire® power supplies, and automotive body control modules requiring stable component supply across extended temperature and voltage ranges.
Supply support for MAX5082ATE+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The MAX5082/MAX5083 family was designed as MAXPower™ step-down converters targeting high-reliability, wide-input industrial power supplies where simplicity, thermal resilience, and low-VIN capability are critical.
FAQ
What is the minimum input voltage supported by the MAX5082ATE+?
The MAX5082ATE+ supports a minimum input voltage of 4.5V, enabled by its internal charge pump circuit connected to C+ and C− pins. This allows reliable operation during cold-crank conditions in automotive or brownout scenarios in industrial systems-unlike the MAX5083ATE+, which requires 7.5V minimum input.
Does the MAX5082ATE+ require external components for gate drive?
Yes-the MAX5082ATE+ requires external components for high-side gate drive: a flying capacitor (CF) between C+ and C−, a bootstrap capacitor (CBST) between BST and LX, and a boost diode from C+ to BST. These form the charge-pump-based gate-drive circuit essential for NMOS high-side switch operation at low input voltages.
How does the MAX5082ATE+ handle output short-circuit conditions?
The MAX5082ATE+ uses hiccup-mode protection: upon detecting four consecutive cycle-by-cycle current-limit events, it discharges the soft-start capacitor, shuts down for 512 clock periods (~2ms at 250kHz), then restarts with soft-start. This prevents thermal damage during sustained shorts while allowing automatic recovery.
Can the MAX5082ATE+ be synchronized to an external clock?
Yes-the MAX5082ATE+ accepts an external clock signal on the SYNC pin, supporting synchronization from 150kHz to 350kHz. When SYNC is grounded, it defaults to its internal 250kHz oscillator. Synchronization eliminates beat frequencies in multi-rail systems and aids EMI compliance testing.
What is the purpose of the SS pin on the MAX5082ATE+?
The SS pin on the MAX5082ATE+ serves dual functions: it provides a 1.228V precision reference for the feedback loop and sources a 15µA current to charge an external capacitor (CSS), controlling the soft-start ramp time. This ensures controlled output voltage rise and prevents inrush current during power-up.
MAX5082ATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 1.23V
- Voltage - Output (Max):
- 32V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 250kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX5082ATE+ FAQ
1.How can I place an order for MAX5082ATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX5082ATE+ 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 MAX5082ATE+ reliable?
The price and inventory of MAX5082ATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX5082ATE+ is usually 5 days.
3.What payment methods are accepted for MAX5082ATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX5082ATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX5082ATE+?
MAX5082ATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX5082ATE+ 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 MAX5082ATE+?
For technical support, including MAX5082ATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX5082ATE+ requirements.
6.How does Aetrix verify that MAX5082ATE+ is sourced from the original manufacturer or authorized distributors?
All MAX5082ATE+ 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 MAX5082ATE+ meets industry standards.
7.What is the process for return or replacement of MAX5082ATE+?
All MAX5082ATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX5082ATE+, 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 MAX5082ATE+ part is unused and in its original packaging.
Return procedure for MAX5082ATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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