My Inquiry
My Account
Analog Devices Inc./Maxim Integrated MAX17640BATA+T
- Part No.:
- MAX17640BATA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-WFDFN
- Datasheet:
-
MAX17640BATA+T.pdf
- Description:
- IC REG BUCK 5V 400MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,120
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAX17640BATA+T from Analog Devices is a high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs, delivering 5.0V at up to 400mA from a 4.5V–60V input. It features peak-current-mode control, programmable PFM/PWM operation via MODE pin, and internal soft-start. Used in industrial sensors and 4–20mA current loops where compact, robust point-of-load regulation is required.
For engineers reviewing the MAX17640BATA+T datasheet, MAX17640BATA+T pinout, MAX17640BATA+T application, or MAX17640BATA+T equivalent, key selection factors include its 5V fixed output, 8-pin 2mm × 2mm TDFN package, 500kHz switching frequency, 92% peak efficiency, and built-in RESET monitoring with hiccup-mode overcurrent protection.
Technical Context
The MAX17640BATA+T employs a fixed-frequency peak-current-mode architecture with internal slope compensation and cycle-by-cycle current limiting. Its MODE pin latches at power-up to select between constant-frequency PWM (MODE = GND) or light-load-optimized PFM (MODE unconnected), directly affecting inductor current behavior and efficiency profile.
It integrates a 5V LDO (VCC) for internal biasing, with 4.75V–5.25V output and 150mV dropout; an EN/UVLO pin enabling programmable input turn-on threshold (1.215V typical rising); and an open-drain RESET output asserting low when VOUT falls below 92% of regulation, with 2ms delay on release.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 60V - supports wide industrial supply rails including 24V, 36V, and 48V systems without external pre-regulation. |
| Output Voltage | Fixed 5.0V ±1.4% - internally trimmed; no external feedback resistors required for nominal operation. |
| Max Output Current | 400mA - sustained load capability with thermal shutdown and hiccup-mode current limit for reliability. |
| Switching Frequency | 500kHz ±7% - enables use of small 68µH inductors and ceramic output capacitors in ultra-compact layouts. |
| Peak Efficiency | 92% - achieved at mid-load with all-ceramic passive components; PFM mode extends light-load efficiency. |
| Shutdown Current | 2.2µA typical - enables low-power system standby with EN/UVLO pulled low. |
| Operating Temp | −40°C to +125°C ambient - qualified for harsh industrial environments with junction limit of +150°C. |
Pinout & Package
MAX17640BATA+T is housed in an 8-pin, 2mm × 2mm TDFN package (package code T822CN+1) with exposed pad for thermal dissipation. Pin 1 is VIN (top-left, marked dot), and pins are arranged counterclockwise per standard TDFN orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input | Accepts 4.5V–60V; requires local 1µF X7R ceramic bypass to GND for EMI suppression and transient response. |
| EN/UVLO (Pin 2) | Enable & input UVLO input | Active-high logic; resistor divider from VIN sets precise turn-on voltage (e.g., 12V or 24V system enable). |
| VCC (Pin 3) | Internal LDO output | 5V bias rail for internal circuitry; must be bypassed with ≥1µF ceramic capacitor to GND. |
| FB/VOUT (Pin 4) | Feedback / output sense | Direct connection to 5V output for fixed-version regulation; no external resistors needed. |
| MODE (Pin 5) | Control mode selection | GND = forced-PWM (constant frequency); open = PFM (pulse-skipping, higher light-load efficiency). |
| RESET (Pin 6) | Open-drain fault monitor | Pulls low when VOUT < 92% of 5V; high-impedance after 2ms delay when VOUT > 95% - enables system reset sequencing. |
| GND (Pin 7) | Power ground | Primary return path; must connect to solid ground plane and tie all grounds at single point near IC. |
| LX (Pin 8) | Switch node | Connects to inductor; high-impedance during shutdown; drives external 68µH inductor in buck topology. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated high-side pMOS (1.75Ω typ) and low-side nMOS (0.6Ω typ) eliminate external Schottky diode, reducing BOM count and conduction losses. |
| Internal compensation | Eliminates need for external compensation network - simplifies design, improves stability across input/output conditions. |
| Monotonic startup into prebiased output | Prevents output capacitor discharge during hot-swap or multi-rail sequencing - critical for FPGA and microcontroller power integrity. |
| Built-in RESET with hysteresis | Provides reliable power-good signaling with 92%/95% thresholds and 2ms delay - enables clean system reset without external supervisor IC. |
| CISPR32 Class B compliance | Meets conducted and radiated emissions limits without additional filtering - reduces EMC debug time in industrial enclosures. |
Applications
| Industrial Sensors | 4–20mA Current Loops |
|---|---|
Use Scenario: Powering analog sensor front-ends in factory automation nodes with 24V loop supply. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 24V loop voltage to stable 5V for op-amps, ADCs, and signal conditioning. Use Value: Enables direct derivation of 5V rail from loop supply without discrete LDO or external pass transistor, saving board space and improving thermal margin. | Use Scenario: Providing isolated 5V bias for transmitter ICs in two-wire 4–20mA field instruments. IC Role / Device Role / Timing Role: High-voltage input buck converter supplying regulated 5V to precision DACs and current-sense amplifiers. Use Value: Supports full 4.5V–60V input range to accommodate aging batteries, long cable drops, and transient surges common in loop-powered devices. |
| HVAC and Building Control | High-Voltage LDO Replacement |
Use Scenario: Powering microcontrollers and communication interfaces (RS-485, CAN) in thermostats and zone controllers using 24VAC/DC building power. IC Role / Device Role / Timing Role: Efficient 24V-to-5V conversion with hiccup-mode protection against shorted bus lines or faulty transceivers. Use Value: Delivers 400mA at 92% efficiency - reduces heat rise vs. linear regulators, eliminating heatsinks in sealed enclosures. | Use Scenario: Replacing inefficient 60V-input linear regulators in legacy industrial modules requiring 5V at ≤400mA. IC Role / Device Role / Timing Role: Drop-in synchronous buck replacement offering 92% efficiency versus <15% for linear solutions at 24V input. Use Value: Cuts power dissipation by >3W at 24V input, enabling smaller PCB footprints and extended component lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | Automotive-grade AEC-Q100; 3–65V input; adjustable output; requires external compensation and feedback resistors. | Targeted at automotive body electronics; lacks fixed 5V option and internal feedback divider. | Select when AEC-Q100 qualification and wider input range (down to 3V) are mandatory; accept added design complexity. |
| TPS54340DDAR | 4.5–36V input; 3–28V adjustable output; 3.5A max; requires external MOSFETs and compensation. | Higher current, lower input voltage ceiling; not suitable for 48V+ industrial rails. | Choose for cost-sensitive 24V systems needing >400mA; avoid for 48V/60V inputs or fixed 5V simplicity. |
Compared with LM5164QDDARQ1 and TPS54340DDAR, MAX17640BATA+T offers plug-and-play 5V regulation in the smallest footprint (2mm × 2mm), with no external feedback or compensation - ideal for space-constrained industrial sensors and loop-powered devices where input exceeds 36V.
Availability
MAX17640BATA+T is available at Aetrix Electronics and suitable for industrial sensors, 4–20mA current loops, and HVAC control systems requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MAX17640BATA+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX17640 family belongs to Analog Devices' Himalaya power portfolio, designed specifically for compact, high-efficiency, wide-input-voltage DC-DC conversion in harsh industrial environments - emphasizing reliability, minimal external components, and ease of layout.
FAQ
What is the output voltage tolerance of the MAX17640BATA+T under full load and temperature range?
The MAX17640BATA+T delivers a fixed 5.0V output with ±1.4% regulation tolerance over −40°C to +125°C ambient and full 400mA load. This is specified as 4.93V to 5.07V (MODE = GND) and 4.93V to 5.18V (MODE unconnected) in the Electrical Characteristics table, ensuring compatibility with 5V-tolerant logic and analog circuits.
Does the MAX17640BATA+T require external feedback resistors to set its 5V output?
No, the MAX17640BATA+T does not require external feedback resistors. As the 'B' variant, it features an internal feedback divider trimmed to 5.0V; FB/VOUT (Pin 4) connects directly to the output node. External resistors are only needed for the adjustable MAX17640C version.
How does the MODE pin affect efficiency and EMI performance in the MAX17640BATA+T?
When MODE is grounded, MAX17640BATA+T operates in forced-PWM mode: constant 500kHz switching, predictable EMI spectrum, but lower light-load efficiency. When MODE is unconnected, it enters PFM mode: pulse-skipping at light loads, higher efficiency, but variable frequency that may complicate EMI filtering - choose based on system priority.
Can the MAX17640BATA+T safely start up into a prebiased 5V output rail?
Yes, the MAX17640BATA+T supports monotonic startup into a prebiased output in both PFM and forced-PWM modes. Its control architecture prevents reverse current flow and output capacitor discharge, making it suitable for hot-swap and multi-rail power sequencing in FPGAs and microcontrollers.
What is the function of the RESET pin on the MAX17640BATA+T, and how is it used in system design?
The RESET pin on MAX17640BATA+T is an open-drain output that asserts low when VOUT falls below 92% of 5V (i.e., 4.6V), and releases (high-impedance) 2ms after VOUT rises above 95% (4.75V). It's used to drive external reset supervisors or microcontroller reset inputs, ensuring reliable power-on reset and brownout detection without extra ICs.
MAX17640BATA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- Himalaya
- Package/Case:
- 8-WFDFN
- 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):
- 4.5V
- Voltage - Input (Max):
- 60V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 400mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x2)
MAX17640BATA+T FAQ
1.How can I place an order for MAX17640BATA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX17640BATA+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 MAX17640BATA+T reliable?
The price and inventory of MAX17640BATA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX17640BATA+T is usually 5 days.
3.What payment methods are accepted for MAX17640BATA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX17640BATA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX17640BATA+T?
MAX17640BATA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX17640BATA+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 MAX17640BATA+T?
For technical support, including MAX17640BATA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX17640BATA+T requirements.
6.How does Aetrix verify that MAX17640BATA+T is sourced from the original manufacturer or authorized distributors?
All MAX17640BATA+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 MAX17640BATA+T meets industry standards.
7.What is the process for return or replacement of MAX17640BATA+T?
All MAX17640BATA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX17640BATA+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 MAX17640BATA+T part is unused and in its original packaging.
Return procedure for MAX17640BATA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX17640BATA+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…
