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Analog Devices Inc./Maxim Integrated MAX77596ETBC+T
- Part No.:
- MAX77596ETBC+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX77596ETBC+T.pdf
- Description:
- IC REG BUCK ADJ 300MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,562
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Product details
Overview
MAX77596ETBC+T from Maxim Integrated is an adjustable-output synchronous buck converter delivering up to 300mA with 3.5V–24V input range, 1.1µA quiescent current in skip mode, 1.7MHz fixed switching frequency, and 98% maximum duty cycle-designed for battery-powered portable devices requiring programmable voltage rails.
For engineers reviewing the MAX77596ETBC+T datasheet, MAX77596ETBC+T pinout, MAX77596ETBC+T application, or MAX77596ETBC+T equivalent, key selection considerations include its 1V–10V adjustable output via external resistor divider, integrated 5V BIAS regulator, open-drain RESET monitoring, forced-PWM/skip-mode control, and thermal/short-circuit protection in a 2mm × 2.5mm TDFN package.
Technical Context
The MAX77596ETBC+T employs peak current-mode control with integrated slope compensation and load-line architecture, enabling stable regulation without external compensation. Its internal transconductance error amplifier and integrated high-side current sensing eliminate layout-sensitive feedback paths.
It supports dual operating modes: skip mode (1.1µA IQ, variable frequency) for ultra-low-power battery operation, and forced-PWM mode (constant 1.7MHz) for predictable EMI filtering. The device features 6.67ms internal soft-start, 42V input tolerance, and robust fault handling including 15-cycle current-limit shutdown followed by 16.5ms retry delay.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Range | 3.5V to 24V - supports direct connection to 2S–4S Li+ batteries and USB Type-C PD sources (5V/12V/20V). |
| IOUT Max | 300mA - sufficient for powering microcontrollers, sensors, and low-power peripherals in space-constrained designs. |
| VOUT Range | 1V to 10V (adjustable) - set precisely via external resistor divider on FB pin; VFB = 1.0V ±3% enables accurate scaling. |
| fSW | 1.7MHz (±6%) - enables use of compact 10µH inductors and low-ESR ceramic capacitors for minimal solution size. |
| IQ (Skip) | 1.1µA at no load (3.3V fixed variant); MAX77596ETBC+T achieves comparable ultra-low IQ in skip mode - extends battery runtime in standby. |
| Duty Cycle Max | 98% - maintains regulation down to VIN ≈ VOUT + dropout, critical for deep battery discharge in portable systems. |
| Protection | Thermal shutdown (175°C), short-circuit recovery (15-cycle limit + 16.5ms retry), and undervoltage lockout (3.2V typ) - ensures safe operation under fault conditions. |
Pinout & Package
The MAX77596ETBC+T is housed in a 2.0mm × 2.5mm × 0.75mm, 10-pin TDFN package with exposed pad (EP) for thermal dissipation. Pin 1 is BST; EP must be soldered to PGND-connected copper plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap supply for high-side driver | Requires 0.1µF capacitor between BST and LX; enables efficient high-side MOSFET gate drive above VIN. |
| SUP | Main power input | Accepts 3.5V–24V; requires ≥4.7µF ceramic decoupling capacitor close to pin for high-frequency noise suppression. |
| LX | Switching node | Connects to inductor; high-impedance when disabled; routing must minimize parasitic inductance for clean switching. |
| PGND | Power ground return | Primary return path for high-current loops (SUP→LX→inductor→COUT); star-connected to AGND under IC. |
| AGND | Analog reference ground | Reference for FB, MODE, RESET; connected to PGND only at single point under device to avoid noise coupling. |
| RESET | Open-drain voltage monitor output | Asserts low when VOUT falls below 90% of nominal; requires external pullup for system reset signaling. |
| MODE | Operating mode select | Ground or floating → skip mode (1.1µA IQ); connect to BIAS → forced-PWM (fixed 1.7MHz). |
| BIAS | Internal 5V LDO output | Supplies internal logic; bypass with 1µF ceramic to AGND; not for external loading. |
| OUT/FB | Feedback input (adjustable version) | Connected to resistive divider (R1/R2) between VOUT and AGND; sets output per VOUT = 1V × (1 + R1/R2). |
| EN | Enable control | Active-high; compatible with 2.4V logic; ties directly to SUP for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable 1V–10V output | Enables single-bom flexibility across multiple voltage rails using one footprint and external resistor selection. |
| 1.7MHz fixed-frequency operation | Reduces required inductor size (e.g., 10µH typical) and output capacitance while maintaining low output ripple. |
| 98% max duty cycle | Extends usable battery life by sustaining regulation during deep discharge (e.g., 2S Li+ down to ~5.4V). |
| Integrated 5V BIAS LDO | Eliminates need for external bias supply; powers internal circuitry and simplifies system power tree design. |
| Open-drain RESET with 92%/90% thresholds | Provides reliable power-good monitoring for MCU reset sequencing without additional supervisor ICs. |
Applications
| USB-C Power Delivery Sink | Wearable Health Monitor |
|---|---|
Use Scenario: Regulating 5V/9V/12V/20V USB-C PD input to 1.8V or 3.3V for SoC and sensor subsystems. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator providing stable, low-noise rail with fast transient response to dynamic load changes. Use Value: 1.7MHz switching and integrated current-mode control deliver <100mV undershoot/overshoot during 100mA load steps, ensuring reliable digital logic operation. | Use Scenario: Powering optical heart-rate sensor, BLE radio, and low-power MCU from coin-cell or small Li-poly battery. IC Role / Device Role / Timing Role: Adjustable buck converter configured for 2.8V output to match sensor analog front-end requirements. Use Value: 1.1µA quiescent current in skip mode extends battery life beyond 6 months in sleep-dominated operation. |
| Industrial Handheld Scanner | Smart Home Sensor Node |
Use Scenario: Converting 12V battery or adapter input to 3.3V for imaging sensor and FPGA configuration logic. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with thermal protection for intermittent high-current bursts during image capture. Use Value: 98% duty cycle allows continued operation as battery drops to 3.6V, avoiding premature shutdown during field use. | Use Scenario: Supplying 3.3V to Zigbee/Thread SoC and environmental sensors from 2S Li-ion pack. IC Role / Device Role / Timing Role: System power manager with RESET output tied to SoC's WDT input for autonomous brownout recovery. Use Value: Integrated RESET with 12µs debounce prevents false resets during brief line transients, improving system reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | 1.8V–5.5V input; 1.8µA IQ; fixed 1.8V/3.3V outputs only; no adjustable option. | Best for ultra-low-IQ fixed-rail designs where output voltage flexibility is not required. | Select if lowest possible IQ (<2µA) and fixed 3.3V output suffice, and 24V input capability is unnecessary. |
| MP2152GQZ-P | 4.5V–17V input; 17µA IQ; 1.2V–5.5V adjustable; 2.2MHz fSW; no integrated BIAS LDO or RESET. | Suitable for mid-voltage industrial supplies where BIAS and RESET are implemented externally. | Choose when input range is limited to ≤17V and external supervision/bias is acceptable to reduce BOM count. |
Compared with TPS62840DLCR and MP2152GQZ-P, the MAX77596ETBC+T uniquely combines 24V input tolerance, 1V–10V adjustability, integrated 5V BIAS, and open-drain RESET in a sub-5mm² package-making it optimal for multi-source, battery-backed, and space-constrained applications demanding full feature integration.
Availability
MAX77596ETBC+T is available at Aetrix Electronics and suitable for portable medical devices, USB-C peripheral power management, and industrial handheld instrumentation requiring stable component supply across extended temperature and long product lifecycles.
Supply support for MAX77596ETBC+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, automotive, and consumer applications.
The MAX77596 series targets ultra-low-power, wide-input-voltage DC-DC conversion in battery-operated portable electronics-emphasizing quiescent current minimization, small solution size, and robust fault handling without external components.
FAQ
What output voltage range does the MAX77596ETBC+T support?
The MAX77596ETBC+T supports an adjustable output voltage range of 1V to 10V, set using an external resistor divider connected to the OUT/FB pin. The internal feedback reference is precisely 1.0V (±3%), enabling accurate scaling. This differs from the fixed-output MAX77596ETBA+ (5V) and MAX77596ETBB+ (3.3V) variants, making MAX77596ETBC+T ideal for designs requiring multiple rail voltages from a single PCB footprint.
How does the MODE pin control operation of the MAX77596ETBC+T?
The MODE pin on the MAX77596ETBC+T selects between two operating modes: connecting MODE to ground (or leaving it floating) enables skip mode with 1.1µA quiescent current, while connecting MODE to the BIAS pin forces continuous PWM operation at 1.7MHz. The pin has a 1MΩ internal pulldown, so no external resistor is needed for skip mode. This dual-mode capability allows designers to optimize efficiency across light and heavy loads without changing hardware.
Does the MAX77596ETBC+T include built-in protection features?
Yes, the MAX77596ETBC+T integrates multiple protection features: cycle-by-cycle current limiting, thermal shutdown at +175°C with +15°C hysteresis, undervoltage lockout (UVLO) at 3.2V (typ), and short-circuit recovery with automatic 16.5ms retry after 15-cycle current-limit shutdown. These protections operate autonomously without external components, enhancing system reliability in unattended or harsh-environment deployments where the MAX77596ETBC+T serves as the primary power stage.
What is the function of the BIAS pin on the MAX77596ETBC+T?
The BIAS pin on the MAX77596ETBC+T provides a regulated 5V output from an internal LDO, used exclusively to power the IC's internal circuitry-including control logic, error amplifier, and gate drivers. It must be bypassed with a 1µF ceramic capacitor to AGND and must not be loaded externally. This integrated BIAS supply eliminates the need for an external bias rail, simplifying power architecture and reducing component count in designs using the MAX77596ETBC+T.
Can the MAX77596ETBC+T operate from a 24V input source?
Yes, the MAX77596ETBC+T is rated for continuous operation from 3.5V to 24V input, with absolute maximum input tolerance up to 42V for transient events (t < 500ms). Its 98% maximum duty cycle and robust high-side/low-side DMOS switches (RON,HS = 2.2Ω max, RON,LS = 1.2Ω max) enable reliable regulation even at high VIN/VOUT ratios. This makes the MAX77596ETBC+T suitable for industrial 24V bus applications and automotive infotainment systems where input voltage stability cannot be guaranteed.
MAX77596ETBC+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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 10V
- 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)
MAX77596ETBC+T FAQ
1.How can I place an order for MAX77596ETBC+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77596ETBC+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 MAX77596ETBC+T reliable?
The price and inventory of MAX77596ETBC+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77596ETBC+T is usually 5 days.
3.What payment methods are accepted for MAX77596ETBC+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77596ETBC+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77596ETBC+T?
MAX77596ETBC+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77596ETBC+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 MAX77596ETBC+T?
For technical support, including MAX77596ETBC+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77596ETBC+T requirements.
6.How does Aetrix verify that MAX77596ETBC+T is sourced from the original manufacturer or authorized distributors?
All MAX77596ETBC+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 MAX77596ETBC+T meets industry standards.
7.What is the process for return or replacement of MAX77596ETBC+T?
All MAX77596ETBC+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77596ETBC+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 MAX77596ETBC+T part is unused and in its original packaging.
Return procedure for MAX77596ETBC+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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