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Analog Devices Inc./Maxim Integrated MAX77596ETBC+
- Part No.:
- MAX77596ETBC+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
MAX77596ETBC+.pdf
- Description:
- IC REG BUCK ADJ 300MA 10TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,104
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Product details
Overview
MAX77596ETBC+ from Maxim Integrated is an adjustable-output synchronous buck converter IC designed for point-of-load regulation in battery-powered systems. It delivers up to 300mA output current with 1.1µA quiescent current in skip mode, operates from 3.5V–24V input, supports 1V–10V programmable output via external resistor divider, and uses fixed 1.7MHz switching frequency for compact filter design - deployed in USB Type-C devices and multi-cell Li+ portable electronics.
For engineers reviewing the MAX77596ETBC+ datasheet, MAX77596ETBC+ pinout, MAX77596ETBC+ application, or MAX77596ETBC+ equivalent, key selection considerations include its adjustable output architecture, 10-pin TDFN package with exposed pad, 98% max duty cycle for low-dropout operation, integrated BIAS LDO, and dual-mode (FPWM/skip) control for light-load efficiency optimization.
Technical Context
The MAX77596ETBC+ implements peak current-mode control with integrated slope compensation and load-line voltage positioning, eliminating need for external compensation. Its internal transconductance error amplifier and open-loop PWM comparator use amplified current-sense signal plus ramp for cycle-by-cycle inductor current regulation.
It features a dedicated 5V BIAS LDO (10mA capable), programmable feedback via OUT/FB pin with 1.0V reference accuracy (±2%), and dual operating modes selected by MODE pin: forced-PWM (MODE = BIAS) or ultra-low-IQ skip mode (MODE = GND or floating). RESET output provides open-drain voltage monitoring with 90–94% VOUT thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5V to 24V - supports direct connection to 2S/3S/4S Li+ batteries and USB Type-C PD sources. |
| Output Current | Up to 300mA - sufficient for powering microcontrollers, sensors, and interface ICs in space-constrained designs. |
| Quiescent Current | 1.1µA in skip mode - extends battery runtime in always-on or low-duty-cycle IoT endpoints. |
| Switching Frequency | 1.7MHz (typ) - enables use of small 10µH inductors and low-ESR ceramic capacitors for minimal solution footprint. |
| Output Voltage Range | 1V to 10V (adjustable) - set precisely via external resistor divider on FB pin; supports diverse core/logic rail requirements. |
| Duty Cycle Max | 98% - maintains regulation down to ~1.02×VOUT input, critical for deep discharge battery operation. |
| FB Reference Voltage | 1.0V ±2% - defines output accuracy baseline; used with R1/R2 divider to calculate VOUT = 1V × (1 + R1/R2). |
| Soft-Start Time | 6.67ms - limits inrush current during power-up, preventing supply sag and system reset events. |
Pinout & Package
MAX77596ETBC+ is housed in a 2.0mm × 2.5mm × 0.75mm, 10-pin TDFN package with exposed thermal pad (EP), rated for -40°C to +85°C ambient operation. The EP must be soldered to a large PGND copper plane using multiple vias for effective thermal dissipation (θJA = 102°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BST | Bootstrap Supply | Connects 0.1µF capacitor between BST and LX to drive high-side MOSFET gate above SUP rail. |
| SUP | Main Power Input | Accepts 3.5V–24V input; requires ≥4.7µF ceramic decoupling capacitor to PGND near pin. |
| LX | Switch Node | Connects to inductor; high-impedance when device is off; carries high di/dt switching current. |
| PGND | Power Ground | High-current return path; must connect to AGND under device in star configuration at output capacitor. |
| AGND | Analog Ground | Reference for feedback and control circuitry; isolated from noisy PGND except at single-point star tie. |
| RESET | Open-Drain Monitor | Asserts low when VOUT < 90% nominal; requires external pullup for system reset signaling. |
| MODE | Operating Mode Select | Ground or float → skip mode (1.1µA IQ); connect to BIAS → forced-PWM (constant fSW). |
| BIAS | Internal 5V LDO Output | Supplies internal logic; requires 1µF ceramic cap to AGND; no external loading permitted. |
| OUT/FB | Feedback Input | For MAX77596ETBC+: connects to resistive divider (R1/R2) between VOUT and AGND to set 1V–10V output. |
| EN | Enable Input | Active-high; compatible with 2.4V logic threshold; ties directly to SUP for always-on operation. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Output Architecture | Enables precise 1V–10V regulation using only two external resistors - eliminates need for multiple fixed-output SKUs. |
| Integrated 5V BIAS LDO | Provides stable internal supply without external regulator; reduces BOM count and layout complexity. |
| Load-Line Voltage Positioning | Delivers critically damped transient response and reduces required output capacitance by 30–50% vs. classical controllers. |
| 98% Max Duty Cycle | Extends usable battery life by maintaining regulation down to input voltages as low as 1.02×VOUT. |
| Thermal & Short-Circuit Protection | Shuts down at 175°C (15°C hysteresis) and cycles soft-start on hard short - prevents damage during fault conditions. |
| 6.67ms Internal Soft-Start | Prevents inrush current spikes that could destabilize upstream supplies or trigger overcurrent protection. |
Applications
| USB Type-C Portable Devices | Multi-Cell Li+ Battery Systems |
|---|---|
Use Scenario: Powering USB-C peripheral hubs, dongles, or accessories drawing ≤300mA from variable 5V–20V PD sources. IC Role / Device Role / Timing Role: Primary DC-DC step-down regulator converting USB-C VBUS to user-defined logic/core voltage (e.g., 1.8V, 3.3V). Use Value: 1.7MHz switching allows tiny 10µH inductors and 22µF X5R output caps - enabling sub-15mm² total solution size. | Use Scenario: Regulating power for MCU subsystems in handheld medical monitors or ruggedized field instruments powered by 2S–4S Li+ packs. IC Role / Device Role / Timing Role: Point-of-load converter delivering stable rail despite wide battery voltage swing (6V–16.8V). Use Value: 98% duty cycle and 1.1µA skip-mode IQ extend runtime by >20% in sleep states versus conventional buck ICs. |
| Low-Power IoT Edge Nodes | Industrial Sensor Signal Chains |
Use Scenario: Supplying 2.5V or 3.3V to BLE/Wi-Fi SoCs and environmental sensors in battery-operated wireless nodes. IC Role / Device Role / Timing Role: Main system power regulator managing dynamic load transitions from µA sleep to 100mA transmit bursts. Use Value: Load-line architecture ensures <50mV undershoot/overshoot during 100mA load steps - avoids brownout resets. | Use Scenario: Providing clean, adjustable bias for precision ADCs, op-amps, or analog front-ends in factory automation sensors. IC Role / Device Role / Timing Role: Low-noise, tightly regulated auxiliary supply decoupled from noisy digital rails. Use Value: Integrated current-mode control and 1.0V FB reference yield ±1.5% output accuracy across temperature and line/load variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62840DLCR | Fixed 1.8V/3.3V outputs only; 0.15µA IQ; 2.4V–6.5V input range; 2.0mm × 2.0mm DSBGA. | Not suitable for 24V input or adjustable output; optimized for ultra-low-power sub-100mA loads. | Select when lowest possible IQ and smallest footprint are mandatory, and input voltage never exceeds 6.5V. |
| MP2152GQZ-P | Adjustable 0.6V–5.5V output; 1.2µA IQ; 2.5V–6V input; 1.5MHz fSW; 2mm × 2mm QFN-8. | Limited to 6V max input - cannot replace MAX77596ETBC+ in 12V/24V or multi-cell battery systems. | Choose for cost-sensitive, lower-input-voltage designs where 300mA output and 10-pin TDFN are not required. |
Compared with TPS62840DLCR and MP2152GQZ-P, the MAX77596ETBC+ uniquely combines 24V input tolerance, 1V–10V adjustability, and 1.1µA skip-mode IQ in a thermally enhanced 10-pin TDFN - making it the only option for compact, long-life regulation across wide industrial and battery voltage ranges.
Availability
MAX77596ETBC+ is available at Aetrix Electronics and suitable for USB Type-C devices, multi-cell Li+ portable electronics, and low-power IoT edge nodes requiring stable component supply with guaranteed long-term availability.
Supply support for MAX77596ETBC+ 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 MAX77596 product line targets space-constrained, battery-operated systems needing high-efficiency, wide-input-voltage DC-DC conversion with ultra-low quiescent current - specifically addressing portable medical, wearables, and USB-C accessory markets.
FAQ
What output voltage range does the MAX77596ETBC+ support?
The MAX77596ETBC+ supports an adjustable output voltage range of 1V to 10V, set using an external resistor divider connected to the OUT/FB pin. Its internal 1.0V feedback reference (±2%) enables precise regulation across this range, with typical accuracy of ±1.5% over temperature and load. This makes MAX77596ETBC+ suitable for powering diverse logic families, sensors, and analog circuitry without requiring multiple fixed-output variants.
How does the MODE pin affect MAX77596ETBC+ operation?
The MODE pin on the MAX77596ETBC+ selects between two operating modes: connecting MODE to ground or leaving it floating enables skip mode (1.1µA quiescent current), while connecting MODE to the BIAS pin forces continuous PWM operation. Skip mode improves light-load efficiency by disabling switching until output voltage drops below threshold, whereas forced-PWM maintains constant 1.7MHz frequency for predictable EMI filtering - both modes are fully supported by the same MAX77596ETBC+ silicon.
Can MAX77596ETBC+ operate from a 24V input source?
Yes, the MAX77596ETBC+ is explicitly rated for continuous operation from 3.5V to 24V input voltage, with transient tolerance up to 42V for <500ms. Its integrated high-side and low-side DMOS switches, 98% maximum duty cycle, and robust 42V input-rated pins make it suitable for industrial 24V rails, automotive battery-supplied systems, and USB-C PD sources - all while maintaining 300mA output capability and 1.1µA skip-mode IQ.
What thermal management is required for MAX77596ETBC+?
The MAX77596ETBC+ requires soldering its exposed pad (EP) to a large PGND copper plane using multiple thermal vias to achieve acceptable junction temperature rise. With θJA = 102°C/W, dissipating 784mW at +70°C ambient demands careful PCB layout: EP must connect to PGND at the output capacitor return, and AGND/PGND must join only at that single point. Without proper EP thermal coupling, the device may trigger thermal shutdown (>175°C) under sustained 300mA load at high ambient temperatures.
Does MAX77596ETBC+ include built-in protection features?
Yes, the MAX77596ETBC+ integrates cycle-by-cycle current limiting, short-circuit recovery with 16.5ms retry delay, thermal shutdown at +175°C (with +15°C hysteresis), and undervoltage lockout (UVLO) at 3.2V (typ). Its RESET output provides open-drain voltage monitoring with 90–94% VOUT thresholds, and the 6.67ms internal soft-start prevents inrush current damage. These protections operate autonomously without external components, ensuring robust operation in unattended or harsh environments for the MAX77596ETBC+.
MAX77596ETBC+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 10-WFDFN Exposed Pad
- Packaging:
- Strip
- 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+ FAQ
1.How can I place an order for MAX77596ETBC+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77596ETBC+ 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+ reliable?
The price and inventory of MAX77596ETBC+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77596ETBC+ is usually 5 days.
3.What payment methods are accepted for MAX77596ETBC+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77596ETBC+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77596ETBC+?
MAX77596ETBC+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77596ETBC+ 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+?
For technical support, including MAX77596ETBC+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77596ETBC+ requirements.
6.How does Aetrix verify that MAX77596ETBC+ is sourced from the original manufacturer or authorized distributors?
All MAX77596ETBC+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX77596ETBC+?
All MAX77596ETBC+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX77596ETBC+, 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+ part is unused and in its original packaging.
Return procedure for MAX77596ETBC+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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