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Analog Devices Inc./Maxim Integrated MAX77596ETBA+T
- Part No.:
- MAX77596ETBA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX77596ETBA+T.pdf
- Description:
- IC REG BUCK 5V 300MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,803
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Product details
Overview
MAX77596ETBA+T from Maxim Integrated is a synchronous buck converter IC delivering up to 300mA output current with 5V fixed output, operating from 3.5V–24V input, featuring 1.1µA quiescent current in skip mode and 1.7MHz switching frequency-ideal for USB Type-C power delivery in portable Li-ion battery systems.
For engineers reviewing the MAX77596ETBA+T datasheet, MAX77596ETBA+T pinout, MAX77596ETBA+T application, or MAX77596ETBA+T equivalent, key selection criteria include its 5V fixed output accuracy (±3%), 98% max duty cycle for low-dropout operation, integrated 5V BIAS regulator, RESET monitoring capability, and TDFN-10 package compatibility with space-constrained point-of-load designs.
Technical Context
The MAX77596ETBA+T implements current-mode PWM control with integrated high-side current sensing and slope compensation, eliminating external compensation components. Its load-line architecture enables critically damped transient response and reduces required output capacitance.
It supports dual operating modes via the MODE pin: forced-PWM for consistent EMI filtering and skip mode for ultra-low 1.1µA IQ at light loads. Internal 5V BIAS regulator powers control circuitry, while undervoltage lockout (3.2V typ) and thermal shutdown (+175°C) ensure robust system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.5V to 24V - supports direct connection to 2S/3S/4S Li-ion batteries and USB Type-C 5V/12V/20V inputs |
| VOUT | Fixed 5.0V ±3% - guaranteed regulation across 0–300mA load and 6–24V input range |
| IOUT Max | 300mA - sufficient for powering microcontrollers, sensors, and interface ICs in portable devices |
| IQ (Skip Mode) | 1.1µA - extends battery runtime in always-on, low-duty-cycle applications like wearables |
| fSW | 1.7MHz (typ) - enables use of compact 10µH inductors and low-ESR ceramic capacitors |
| Duty Cycle Max | 98% - maintains regulation down to VIN ≈ VOUT + 0.2V, critical for end-of-battery-life operation |
| RESET Threshold | 92% VOUT rising / 90% VOUT falling - provides precise power-good signaling for system sequencing |
| Operating Temp | −40°C to +85°C - qualified for industrial and extended-temperature portable equipment |
Pinout & Package
MAX77596ETBA+T is housed in a 2.0mm × 2.5mm × 0.75mm, 10-pin TDFN-EP package with exposed pad (EP) for thermal dissipation. The package is RoHS-compliant and lead-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side driver | Requires 0.1µF capacitor between BST and LX to sustain gate drive during high-duty-cycle operation |
| SUP | Main power input | Accepts 3.5–24V; requires ≥4.7µF ceramic decoupling capacitor placed adjacent to pin |
| LX | Switching node | Connects to inductor; high-impedance when device is disabled; drives external LC filter |
| PGND | Power ground return | Must be connected to large copper plane and star-connected to AGND under device |
| AGND | Analog ground reference | Separate from PGND except at single-point star connection near output capacitor |
| RESET | Open-drain reset output | Asserts low when VOUT drops below 90% nominal; requires external pullup for system reset signaling |
| MODE | Operation mode select | Ground or open = skip mode (1.1µA IQ); connect to BIAS = forced-PWM (constant 1.7MHz) |
| BIAS | Internal 5V LDO output | Supplies internal logic; requires 1µF ceramic cap to AGND; must not be externally loaded |
| OUT/FB | Output voltage sense / feedback | Fixed-output version: connects directly to regulated 5V output; bypass with ≥22µF X5R ceramic cap |
| EN | Enable control input | Logic-compatible; active-high; compatible with 2.4V min logic threshold; ties directly to SUP for always-on use |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5V BIAS regulator | Eliminates need for external bias supply; powers internal control blocks and reduces BOM count |
| Load-line voltage positioning | Optimizes transient response by allowing controlled load regulation, reducing required output capacitance |
| 6.67ms internal soft-start | Minimizes inrush current into output capacitor, preventing supply rail collapse during startup |
| Current-mode control with slope compensation | Enables stable operation without external compensation network and inherent line-voltage rejection |
| Short-circuit & thermal protection | Auto-retry soft-start after fault clearance; thermal shutdown at +175°C with +15°C hysteresis ensures reliability |
| 42V input tolerance (transient) | Withstands load-dump transients up to 42V for <500ms, enhancing robustness in automotive-adjacent applications |
Applications
| USB Type-C Power Delivery | Portable Medical Sensors |
|---|---|
Use Scenario: Regulating 5V power from variable USB Type-C sources (5V/9V/15V/20V) to supply MCU, BLE radio, and analog front-end in handheld diagnostic tools. IC Role / Device Role: Primary step-down DC-DC converter providing stable 5V rail with fast transient response and minimal solution size. Use Value: 1.7MHz switching enables compact 10µH inductor and 22µF ceramic output cap; 1.1µA IQ extends battery life between measurements. | Use Scenario: Powering low-power ECG/SpO₂ sensor modules powered by 2S or 3S Li-ion batteries with strict standby current budgets. IC Role / Device Role: Main system regulator delivering 5V to mixed-signal SoC and precision ADCs under varying battery voltage (6–12.6V). Use Value: 98% max duty cycle sustains regulation down to ~5.2V input; RESET signal enables reliable brown-out detection and graceful shutdown. |
| Industrial Handheld Terminals | Smart Wearables |
Use Scenario: Providing 5V rail for barcode scanner, display driver, and secure element in ruggedized warehouse terminals using 4S Li-ion packs. IC Role / Device Role: High-input-voltage buck converter handling wide VIN range (8–16.8V) while maintaining tight output accuracy and thermal stability. Use Value: −40°C to +85°C rating ensures operation in cold storage or hot docks; 42V transient tolerance guards against supply spikes during hot-plug events. | Use Scenario: Supplying 5V to Bluetooth LE SoC and haptic feedback driver in compact fitness trackers with coin-cell or thin-film battery backup. IC Role / Device Role: Ultra-low-IQ buck converter enabling multi-week standby on small-capacity batteries. Use Value: 1.1µA skip-mode IQ minimizes quiescent loss; small 2.0×2.5mm TDFN footprint fits within tight PCB area constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | 2.7–6.5V input, 5V fixed output, 0.36µA IQ, 1.8MHz fSW, 1.5A IOUT, 6-pin WSON | Lower input range; higher output current; smaller package but no RESET or BIAS output | Select when ultra-low IQ (<0.5µA) and higher current are prioritized over wide-VIN and system-monitoring features |
| MP2152GQZ-P | 4.5–18V input, 5V fixed output, 1.5µA IQ, 2MHz fSW, 600mA IOUT, 10-pin QFN | Higher max IOUT; wider fSW tolerance; lacks integrated BIAS LDO and RESET output | Select when higher output current and slightly lower IQ are acceptable trade-offs for missing monitoring and bias functions |
Compared with TPS62840DLCR and MP2152GQZ-P, the MAX77596ETBA+T uniquely integrates a 5V BIAS LDO and open-drain RESET output while supporting 24V input-making it optimal for systems requiring auxiliary power and power-good signaling alongside wide-input regulation.
Availability
MAX77596ETBA+T is available at Aetrix Electronics and suitable for USB Type-C devices, portable medical sensors, and industrial handheld terminals requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MAX77596ETBA+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 demanding industrial, medical, and portable applications.
The MAX77596ETBA+T belongs to Maxim's ultra-low-power buck converter product line, engineered specifically for battery-powered systems needing wide-input-voltage regulation, minimal quiescent current, and integrated system-monitoring features.
FAQ
What is the output voltage tolerance of the MAX77596ETBA+T over full load and temperature?
The MAX77596ETBA+T delivers a fixed 5.0V output with ±3% accuracy over 0–300mA load, 6–24V input, and −40°C to +85°C ambient temperature. Measured values fall between 4.8V (min) and 5.15V (max), verified per Electrical Characteristics table in the official datasheet.
Does the MAX77596ETBA+T require an external feedback resistor network?
No, the MAX77596ETBA+T does not require an external feedback resistor network. As a fixed 5V output variant, its OUT/FB pin connects directly to the regulated output and is bypassed with a minimum 22µF X5R ceramic capacitor to PGND-no resistive divider is needed or used.
How is the RESET signal configured and what voltage thresholds trigger it on the MAX77596ETBA+T?
The MAX77596ETBA+T features an open-drain RESET output requiring an external pullup resistor. It asserts low when VOUT falls below 90% of nominal (4.5V for 5V output) and releases high-impedance when VOUT rises above 92% (4.6V), with 12µs debounce time-enabling reliable power-good monitoring for system sequencing.
What thermal performance can be expected from the MAX77596ETBA+T in a standard 4-layer PCB layout?
On a standard 4-layer JEDEC JESD51-7 board, the MAX77596ETBA+T exhibits 102°C/W junction-to-ambient thermal resistance. With 784mW max continuous power dissipation at +70°C ambient and 9.8mW/°C derating above that, proper copper pour and EP grounding enable stable operation at full 300mA load within its −40°C to +85°C range.
Can the MAX77596ETBA+T operate from a 5V USB source while delivering 300mA at 5V output?
Yes, the MAX77596ETBA+T can operate from a 5V USB source while delivering 300mA at 5V output, leveraging its 98% maximum duty cycle to maintain regulation near dropout. However, efficiency drops significantly below ~6V input due to conduction losses; typical efficiency at 5VIN/5VOUT is ~72% (skip mode) per Typical Operating Characteristics.
MAX77596ETBA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- 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):
- 24V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA
- Frequency - Switching:
- 1.7MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TDFN (2.5x2)
MAX77596ETBA+T FAQ
1.How can I place an order for MAX77596ETBA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77596ETBA+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 MAX77596ETBA+T reliable?
The price and inventory of MAX77596ETBA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77596ETBA+T is usually 5 days.
3.What payment methods are accepted for MAX77596ETBA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77596ETBA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77596ETBA+T?
MAX77596ETBA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77596ETBA+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 MAX77596ETBA+T?
For technical support, including MAX77596ETBA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77596ETBA+T requirements.
6.How does Aetrix verify that MAX77596ETBA+T is sourced from the original manufacturer or authorized distributors?
All MAX77596ETBA+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 MAX77596ETBA+T meets industry standards.
7.What is the process for return or replacement of MAX77596ETBA+T?
All MAX77596ETBA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77596ETBA+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 MAX77596ETBA+T part is unused and in its original packaging.
Return procedure for MAX77596ETBA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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