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Analog Devices Inc./Maxim Integrated MAX15037ATE+
- Part No.:
- MAX15037ATE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-WQFN Exposed Pad
- Datasheet:
-
MAX15037ATE+.pdf
- Description:
- IC REG BUCK ADJ 3A 16TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,516
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Product details
Overview
MAX15037ATE+ from Maxim Integrated is a synchronous buck DC-DC converter IC with integrated 150mΩ high-side n-channel MOSFET, supporting 4.5V–5.5V or 5.5V–23V input, 0.6V adjustable output, up to 3A load current, and resistor-programmable switching frequency from 200kHz to 2.2MHz. It delivers high-efficiency point-of-load regulation in automotive radio power supplies and IP phone systems.
For engineers reviewing the MAX15037ATE+ datasheet, MAX15037ATE+ pinout, MAX15037ATE+ application, or MAX15037ATE+ equivalent, this page provides verified technical context, confirmed pin functions, real-world application constraints, and validated alternative options for synchronous buck designs requiring thermal robustness, power-good signaling, and external low-side FET drive capability.
Technical Context
The MAX15037ATE+ implements voltage-mode PWM control with peak-current limiting and adaptive break-before-make (25ns tBBM) to prevent shoot-through between its internal high-side MOSFET and externally driven low-side synchronous rectifier. Its digital soft-start executes 64-step ramping over 4096 oscillator cycles.
It integrates a 5.2V VL regulator (with 4.1V UVLO and 137mV hysteresis), a dedicated DL driver (0.75A source / 1A sink), and a PGOOD open-drain output asserting at 92.5% of VFB (0.600V nominal) after valid regulation-no reset timeout delay required unlike MAX15036's RESET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V–5.5V or 5.5V–23V - supports dual-input domains without external LDO; VL regulator follows V+ below 5.5V, regulates to 5.2V above. |
| Output Current | Up to 3A - limited by package thermal dissipation (2.7W max in 5mm×5mm TQFN); peak current limit is 4.6A (typ). |
| Switching Frequency | 200kHz–2.2MHz - set via ROSC resistor; minimum controllable on-time is 120ns, enabling high VIN/VOUT ratios. |
| Feedback Reference | 0.600V ±9mV - enables precise output regulation down to 0.6V with standard resistor dividers. |
| Power-Good Threshold | 92.5% of VFB - asserts PGOOD high immediately upon crossing threshold (no delay), critical for system sequencing. |
| Thermal Shutdown | +170°C with 25°C hysteresis - protects against sustained overload or poor PCB thermal design in -40°C to +125°C ambient. |
| Package | 16-pin TQFN-EP (5mm × 5mm) - exposed pad soldered to SGND enhances θJA to 30°C/W and supports 2.7W continuous dissipation. |
Pinout & Package
MAX15037ATE+ uses a thermally enhanced 16-pin TQFN-EP (5mm × 5mm) package with exposed pad (EP) connected to SGND for optimal heat transfer. Pin numbering follows standard top-view layout with EP centered beneath the die.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1,2 DRAIN | High-side MOSFET drain | Connects to input supply in buck topology; carries full switch node voltage/current transients - requires tight layout to PGND. |
| 3 COMP | Error amplifier output | Drives external compensation network (type II/III) between COMP–FB or COMP–SGND to stabilize loop response. |
| 4 FB | Feedback input | Senses output voltage via resistive divider; 250nA bias current minimizes divider error; reference is 0.600V. |
| 5 OSC | Oscillator programming | ROSC resistor to SGND sets fSW; remains required even when SYNC is used (must satisfy 0.8×fSYNC ≤ fSW ≤ 1.2×fSYNC). |
| 6 BYPASS | Reference bypass | Stabilizes internal 2V reference; requires ≥0.22μF ceramic capacitor to SGND - noise-sensitive node. |
| 7 V+ | Main input supply | Accepts 4.5V–23V; bypass with ≥0.1μF ceramic close to pin; powers high-side gate driver and internal circuits. |
| 8 VL | Internal LDO output | 5.2V regulated supply for logic/control; bypass with 4.7μF to SGND + 0.1μF to PGND; dropout occurs below 5.5V input. |
| 9 DL | Synchronous rectifier driver | Drives external low-side n-MOSFET; 0.75A source / 1A sink capability ensures fast turn-on/turn-off; includes adaptive BBM timing. |
| 10 SGND | Signal ground | Reference for FB, COMP, OSC, EN, SYNC, PGOOD; must be separated from PGND except at single-point tie. |
| 11 PGND | Power ground | Return path for high-current paths: input cap, output cap, diode anode, VL bypass cap - minimize loop area. |
| 12 SOURCE | MOSFET source | Switch node connection in buck; ties to inductor SW node - high di/dt path requiring short, wide trace to PGND. |
| 13 SYNC | External clock input | Accepts 200kHz–2.2MHz logic-level signal; synchronizes rising edge to high-side turn-on; 100ns min pulse width. |
| 14 PGOOD | Power-good indicator | Open-drain output active-high at 92.5% VFB; sinks ≤3mA; requires external pull-up; no timeout delay unlike RESET. |
| 15 BST/VDD | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; connect flying capacitor + diode (buck) or 0.1μF cap to PGND (boost - not used in MAX15037). |
| 16 EN | Enable control | Active-high TTL input (2.0V VIH, 0.8V VIL); initiates digital soft-start on rising edge; latch-up risk if glitched <5ms after assertion. |
| EP | Exposed pad | Must be soldered to SGND plane; primary thermal path - accounts for >70% of total heat removal in PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectifier driver (DL) | Enables >90% efficiency at 1.5A/3.3V (12VIN, 330kHz) by replacing lossy Schottky diode with low-RDS(on) external MOSFET. |
| Adaptive break-before-make (BBM) | 25ns controlled dead time prevents cross-conduction between internal high-side and external low-side FETs - eliminates shoot-through risk. |
| Digital soft-start | 64-step, 4096-cycle ramp eliminates input surge current and output overshoot during startup - no external components needed. |
| Power-good (PGOOD) output | Fast-asserting open-drain signal confirms stable regulation at 92.5% VFB, enabling reliable system power sequencing without delay timers. |
| Thermally enhanced TQFN | 5mm×5mm package with exposed pad achieves 30°C/W θJA on 4-layer board - supports 2.7W continuous dissipation at +70°C ambient. |
Applications
| Automotive Radio Power Supply | IP Phone / WLAN Access Point |
|---|---|
Use Scenario: Regulating 12V vehicle battery to 3.3V/1.2V for DSP, RF front-end, and memory in infotainment head units. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing transient-heavy loads with PGOOD-driven enable sequencing for downstream LDOs. Use Value: 90% efficiency at 1.5A reduces thermal stress in sealed enclosures; PGOOD ensures clean boot sequence before MCU initialization. | Use Scenario: Generating 3.3V and 1.2V rails from PoE-derived 12V/24V input in VoIP phones and wireless access points. IC Role / Device Role / Timing Role: High-density POL converter delivering stable output under dynamic Ethernet traffic-induced load steps (0.2A→1A in 20μs). Use Value: 120ns minimum on-time and 2.2MHz operation allow compact 4.7μH inductors; DL driver enables <10mΩ RDS(on) sync FETs for low dropout. |
| Servers and Network Equipment | xDSL Modem Power Supplies |
Use Scenario: Providing 3.3V core power to FPGA I/O banks or ASIC peripherals in compact network switches with strict thermal budgets. IC Role / Device Role / Timing Role: Secondary buck regulator synchronized via SYNC to main system clock to reduce EMI peaks and simplify filtering. Use Value: External synchronization (200kHz–2.2MHz) eliminates beat frequencies; 16-pin TQFN fits high-density layouts where space is constrained. | Use Scenario: Generating isolated 3.3V/5V rails from wide-range AC/DC adapter outputs (12V–24V) in DSL modems with multiple analog and digital subsystems. IC Role / Device Role / Timing Role: Main DC-DC stage handling line-transient events (14V→21V step) while maintaining <200mV output deviation per MAX15037 toc11. Use Value: Fast line-transient response (<100μs recovery) and thermal shutdown (+170°C) ensure reliability in unventilated CPE enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2451DT-LF-Z | 3A synchronous buck, 4.5V–28V input, fixed 500kHz fSW, no PGOOD, no SYNC, smaller 8-pin SOIC package. | Lacks power sequencing support and frequency flexibility; suited for cost-sensitive, non-synchronized applications. | Select MP2451DT-LF-Z only when PGOOD, SYNC, and adjustable fSW are unnecessary and board space permits SOIC footprint. |
| TPS54332DR | 3A synchronous buck, 3.5V–28V input, 100kHz–2.5MHz adjustable fSW, PGOOD, but no DL driver - integrates both FETs. | Monolithic design eliminates external low-side FET but forfeits optimization of RDS(on) and thermal partitioning. | Choose TPS54332DR when board area is critical and external FET selection is not required; MAX15037ATE+ preferred when discrete FET optimization or thermal separation is needed. |
Compared with MP2451DT-LF-Z and TPS54332DR, MAX15037ATE+ uniquely combines external low-side FET drive (DL), precise PGOOD timing, and full 200kHz–2.2MHz programmability - making it optimal for thermally constrained, sequenced, and EMI-sensitive synchronous buck designs.
Availability
MAX15037ATE+ is available at Aetrix Electronics and suitable for automotive radio power supplies, IP phone/WLAN access point power rails, and xDSL modem POL regulation requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MAX15037ATE+ 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 demanding industrial, automotive, and communications applications.
The MAX15037ATE+ belongs to Maxim's high-frequency synchronous buck converter product line, engineered specifically for compact, high-efficiency point-of-load regulation in thermally constrained environments with strict power sequencing requirements.
FAQ
What is the maximum supported switching frequency for MAX15037ATE+?
The MAX15037ATE+ supports a maximum switching frequency of 2.2MHz, set by connecting an appropriate resistor (e.g., ~5.62kΩ) from the OSC pin to SGND. This high frequency enables use of small external inductors (e.g., 4.7μH) and capacitors, reducing solution size - critical for space-constrained applications like IP phones and automotive modules. Operation at 2.2MHz is fully characterized across temperature and load.
Does MAX15037ATE+ include an integrated low-side MOSFET?
No, MAX15037ATE+ does not integrate a low-side MOSFET. It features a dedicated synchronous rectifier driver (DL pin) designed to drive an external low-side n-channel MOSFET. This architecture allows designers to select optimal RDS(on), thermal performance, and voltage rating for their specific application - unlike monolithic alternatives that fix both FETs. The DL pin provides 0.75A source and 1A sink capability for fast switching.
What is the function of the PGOOD pin on MAX15037ATE+?
The PGOOD pin on MAX15037ATE+ is an open-drain output that goes high when the regulated output voltage reaches and sustains ≥92.5% of its nominal value (based on the 0.600V FB reference). Unlike the MAX15036's RESET output, PGOOD asserts immediately upon threshold crossing - with no built-in timeout delay - making it ideal for precise power sequencing in systems requiring deterministic startup timing.
Can MAX15037ATE+ operate from a 5V input supply?
Yes, MAX15037ATE+ supports 4.5V–5.5V input operation. In this range, the internal VL regulator operates in dropout mode: VL follows V+ (so VL ≈ 5V), and the device relies on external bypassing. For reliable operation, connect V+ directly to VL and bypass VL with both a 4.7μF ceramic capacitor to SGND and a 0.1μF ceramic capacitor to PGND - as specified in the datasheet's "Input Voltage (V+)/Internal Linear Regulator (VL)" section.
What thermal considerations apply to MAX15037ATE+ in a 16-pin TQFN package?
MAX15037ATE+ in its 16-pin TQFN-EP (5mm × 5mm) package achieves 30°C/W junction-to-ambient thermal resistance (θJA) on a standard 4-layer PCB. To realize this, the exposed pad (EP) must be soldered to a solid SGND copper plane with ≥4 thermal vias. Continuous power dissipation is rated at 2.7W - exceeding this risks thermal shutdown at +170°C. Layout must separate SGND and PGND, minimize high-di/dt loops, and place input/output capacitors adjacent to respective pins.
MAX15037ATE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-WQFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 23V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 20.13V
- Current - Output:
- 3A
- Frequency - Switching:
- 312kHz ~ 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TQFN (5x5)
MAX15037ATE+ FAQ
1.How can I place an order for MAX15037ATE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX15037ATE+ 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 MAX15037ATE+ reliable?
The price and inventory of MAX15037ATE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX15037ATE+ is usually 5 days.
3.What payment methods are accepted for MAX15037ATE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX15037ATE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX15037ATE+?
MAX15037ATE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX15037ATE+ 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 MAX15037ATE+?
For technical support, including MAX15037ATE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX15037ATE+ requirements.
6.How does Aetrix verify that MAX15037ATE+ is sourced from the original manufacturer or authorized distributors?
All MAX15037ATE+ 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 MAX15037ATE+ meets industry standards.
7.What is the process for return or replacement of MAX15037ATE+?
All MAX15037ATE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX15037ATE+, 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 MAX15037ATE+ part is unused and in its original packaging.
Return procedure for MAX15037ATE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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