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Analog Devices Inc./Maxim Integrated MAX8716ETG+TG50
- Part No.:
- MAX8716ETG+TG50
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Special Purpose Regulators
- Package:
- -
- Datasheet:
-
MAX8716ETG+TG50.pdf
- Description:
- INTEGRATED CIRCUIT
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Product details
Overview
MAX8716ETG+TG50 from Maxim Integrated is a dual, interleaved, fixed-frequency synchronous step-down SMPS controller for notebook main power rails (3.3V/5V). It features 40/60° phase shift, 200/300/500kHz selectable switching frequency, 4V–26V input range, and independent ON/OFF control with PGOOD outputs - deployed in battery-powered computing systems requiring high-efficiency, low-input-ripple DC-DC conversion.
For engineers reviewing the MAX8716ETG+TG50 datasheet, MAX8716ETG+TG50 pinout, MAX8716ETG+TG50 application, or MAX8716ETG+TG50 equivalent, key selection criteria include interleaved duty-cycle overlap threshold (8.3V min VIN), lossless current sensing capability, Dual Mode™ fixed/adjustable output configuration, and thermal shutdown at +160°C - all critical for stable 2–4 Li+ cell system power design.
Technical Context
The MAX8716ETG+TG50 implements two independent PWM controllers with optimal 40/60° interleaving to minimize input capacitor RMS current and extend effective duty-cycle range down to 8.3V input before overlap. Its architecture supports both resistor-based and lossless inductor DCR current sensing, with dedicated CSH/CSL inputs per channel and ILIM-adjustable thresholds.
It integrates dual high-side (DH1/DH2) and low-side (DL1/DL2) gate drivers with 1.5Ω typical DH on-resistance and 0.6Ω DL low-state RDS(on), plus internal 2.0V ±0.75% reference (REF), soft-start/soft-stop ramp control, and tri-level SKIP logic for PWM/skip/low-noise mode selection per channel.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 26V - supports wide-input battery adapters and unregulated DC sources without pre-regulation. |
| Switching Frequency | 200/300/500kHz (FSEL-selectable) - enables optimization of efficiency vs. size trade-offs in compact notebook layouts. |
| Output Voltage Modes | Dual Mode™: fixed 3.3V/5V or adjustable 1.0V–5.5V - simplifies BOM by supporting multiple rail configurations with one IC. |
| Current Limit Threshold | Fixed 50mV or adjustable (0.5×VREF to 2.0V) - provides precise overcurrent protection scalable to MOSFET RDS(on) or sense-resistor values. |
| Reference Accuracy | 2.0V ±0.75% (0°C to +85°C) - ensures tight output regulation tolerance across temperature and load conditions. |
| Thermal Shutdown | +160°C with 15°C hysteresis - protects against sustained overload or poor heatsinking in sealed laptop enclosures. |
| PGOOD Threshold | ±10% window with 1% hysteresis - delivers reliable power-rail monitoring for CPU/GPU sequencing and fault reporting. |
Pinout & Package
The MAX8716ETG+TG50 is housed in a 24-pin thin QFN package (4mm × 4mm, T2444-4), thermally enhanced with an exposed pad connected to AGND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 1) | Analog supply input | 4.5V–5.5V bias for internal analog circuitry; requires RC filter from VDD to reduce noise coupling. |
| SKIP1/2 (Pins 2, 4) | Tri-level mode control | GND = Idle (pulse-skipping), VCC = PWM, REF = low-noise - enables dynamic efficiency/noise optimization per rail. |
| REF (Pin 3) | Precision 2.0V reference output | Sources ≤50µA; used for FSEL, ILIM scaling, and feedback reference; shuts down when both ON1/ON2 are low. |
| ON1/ON2 (Pins 6, 7) | Independent enable inputs | Logic-high active; supports flexible power sequencing (e.g., 3.3V before 5V) and independent fault isolation. |
| FB1/FB2 (Pins 23, 10) | Feedback inputs | Connect to VCC for fixed 3.3V/5V; regulate to 1.0V in adjustable mode - sets output voltage via external resistor divider. |
| CSH1/CSL1, CSH2/CSL2 (Pins 21–22, 11–12) | Differential current-sense inputs | Supports sense-resistor or lossless DCR sensing; threshold programmable via ILIM1/ILIM2 pins. |
| BST1/BST2 (Pins 20, 13) | Bootstrap capacitor connections | Drive high-side MOSFET gates above LX; require 0.1µF ceramic caps and optional series resistors for turn-on current control. |
| DH1/DH2 (Pins 19, 14) | High-side gate drivers | Swing from LX to BST; 1.5Ω typical RDS(on); designed for N-channel high-side switches in synchronous buck topology. |
| DL1/DL2 (Pins 17, 16) | Low-side gate drivers | Swing from PGND to VDD; 0.6Ω low-state RDS(on); drive N-channel synchronous rectifiers. |
| LX1/LX2 (Pins 18, 15) | Switch-node connections | Connect to inductor switch points; serve as return for DH drivers and define switching node voltage swing. |
| PGOOD1/PGOOD2 (Pins 24, 9) | Open-drain power-good outputs | Assert low during soft-start, undervoltage (>10%), or shutdown - interface directly with CPU reset or PMIC sequencing logic. |
| VDD (Pin 17) | Gate-driver supply | 5V supply for DL/DH drivers; must be decoupled locally; separate from VCC to isolate power-switching noise. |
| GND (Pin 16) | Power/analog ground | Single-pin AGND/PGND connection (per Note 1); exposed pad must be soldered to PCB ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| 40/60° Interleaved Phase Shift | Reduces input ripple current by >50% vs. 180° interleaving, enabling smaller input capacitors and lower EMI in space-constrained notebooks. |
| Dual Mode™ Output Configuration | Eliminates need for separate fixed-output and adjustable-output controllers - same IC supports 3.3V/5V factory-set rails or custom 1.0V–5.5V designs. |
| Lossless Inductor Current Sensing | Removes sense-resistor power loss and board area; uses DCR of power inductor with integrated amplifier compensation. |
| Independent Soft-Start & Soft-Stop | Prevents inrush current damage and negative voltage dips during power-up/down - critical for hot-pluggable battery and adapter transitions. |
| Tri-Level SKIP Logic per Channel | Enables simultaneous optimization of light-load efficiency (Idle), acoustic noise (Low-Noise), and transient response (PWM) across dual outputs. |
Applications
| Mobile Computing Power | Notebook Main Supply |
|---|---|
Use Scenario: Power management in ultra-thin subnotebooks with dual Li+ cells (8.4V–12.6V nominal). IC Role / Device Role / Timing Role: Dual-channel synchronous buck controller generating regulated 3.3V and 5V main rails from battery or AC adapter. Use Value: 40/60° interleaving extends minimum input voltage to 8.3V before duty-cycle overlap, preserving regulation during deep battery discharge. | Use Scenario: Core voltage generation in 15.6" consumer notebooks with discrete GPU and multi-core CPU. IC Role / Device Role / Timing Role: Primary SMPS controller coordinating power sequencing via independent ON1/ON2 and PGOOD1/PGOOD2 signals. Use Value: Independent soft-start ramps prevent system reset glitches; ±10% PGOOD window ensures robust CPU power-good assertion under load transients. |
| Embedded Industrial Tablet | Battery-Powered Test Equipment |
Use Scenario: Ruggedized tablet operating from 3S Li-ion packs (9V–12.6V) in field-deployed instrumentation. IC Role / Device Role / Timing Role: High-efficiency dual-output DC-DC controller powering FPGA I/O banks (3.3V) and analog front-end (5V). Use Value: Lossless DCR current sensing eliminates sense-resistor heat and improves thermal margin in sealed enclosures. | Use Scenario: Portable oscilloscope or multimeter with rechargeable battery and USB-C PD input. IC Role / Device Role / Timing Role: Interleaved controller managing main system rails while supporting dynamic mode switching (PWM → skip → low-noise) based on display/audio activity. Use Value: Tri-level SKIP logic reduces audible coil whine during measurement standby without sacrificing transient response during active sampling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual interleaved buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX8717ETI+ | 28-pin TQFN (5mm × 5mm); adds FSEL pin and ILIM2; supports 250/300/400kHz (MAX8756) or 200/300/500kHz (MAX8717) | Designed for higher-current I/O rails; includes additional configuration flexibility for complex power trees | Select MAX8717ETI+ when board layout allows larger package and FSEL-based frequency tuning is required. |
| RT8205AZSP | Single-chip dual-phase controller with integrated MOSFET drivers; 300kHz fixed frequency; no ILIM adjustment or REF output | Targeted at cost-sensitive mainstream notebooks; lacks lossless sensing and tri-level SKIP modes | Choose RT8205AZSP only for simplified, lower-BOM-cost designs where adjustable current limit and low-noise mode are not required. |
Compared with MAX8717ETI+, the MAX8716ETG+TG50 offers identical core control architecture but in a smaller 24-pin QFN with no FSEL pin - ideal for space-constrained main rail designs. Versus RT8205AZSP, it delivers superior configurability (mode selection, current limit scaling, reference output) at the cost of external MOSFETs and slightly higher component count.
Availability
MAX8716ETG+TG50 is available at Aetrix Electronics and suitable for notebook computers, industrial tablets, and battery-powered test equipment requiring stable component supply, long-lifecycle support, and guaranteed lead-free compliance.
Supply support for MAX8716ETG+TG50 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for computing, industrial, and communications markets.
The MAX8716ETG+TG50 belongs to Maxim's notebook power-controller product line, engineered specifically for high-efficiency, low-EMI dual-rail DC-DC conversion in portable computing platforms with stringent thermal and space constraints.
FAQ
What is the minimum input voltage before duty-cycle overlap occurs in the MAX8716ETG+TG50?
The MAX8716ETG+TG50 achieves optimal 40/60° interleaving that delays duty-cycle overlap until input voltage drops to 8.3V in 5V/3.3V applications - significantly lower than the ~10V threshold of conventional 180° out-of-phase regulators. This extended range ensures stable regulation during deep discharge of 2–4 Li+ cell batteries, directly supporting runtime-critical mobile computing use cases. The behavior is inherent to the MAX8716ETG+TG50's phase-control architecture and does not require external configuration.
Does the MAX8716ETG+TG50 support lossless current sensing, and how is it implemented?
Yes, the MAX8716ETG+TG50 supports lossless inductor DCR current sensing via its differential CSH/CSL inputs per channel. It measures voltage drop across the inductor's parasitic resistance instead of using a discrete sense resistor, eliminating associated power loss and board area. Implementation requires an RC network (RSENSE, CSENSE) between CSH/CSL and the inductor terminals to compensate for DCR thermal drift and phase lag. This feature is fully supported in the MAX8716ETG+TG50's internal amplifier and current-limit comparator design.
How does the tri-level SKIP input function on the MAX8716ETG+TG50, and what are its operational modes?
The SKIP1 and SKIP2 inputs on the MAX8716ETG+TG50 are tri-level logic controls: GND enables Idle Mode (pulse-skipping for highest light-load efficiency), VCC selects forced PWM mode (fixed frequency for predictable EMI), and REF activates Low-Noise Mode (frequency shifted out of audible range). Each mode is independently configurable per channel, allowing simultaneous optimization - e.g., PWM on 5V for CPU stability while Idle Mode runs 3.3V I/O rails. The MAX8716ETG+TG50's internal comparators decode these levels without external level-shifting.
What is the purpose of the REF pin on the MAX8716ETG+TG50, and can it be left unconnected?
REF is a precision 2.0V ±0.75% output used for FSEL frequency selection, ILIM threshold scaling, and as a stable reference for external circuitry. It sources up to 50µA and shuts down when both ON1 and ON2 are low. Leaving REF unconnected is not recommended: floating REF may cause unstable FSEL decoding or inaccurate current limiting. Per datasheet guidance, REF must be bypassed to AGND with ≥0.1µF ceramic capacitor, and loading should stay within specified current limits to maintain MAX8716ETG+TG50 output accuracy.
Can the MAX8716ETG+TG50 generate non-standard output voltages like 2.5V or 1.8V, and how is this configured?
Yes, the MAX8716ETG+TG50 supports adjustable outputs from 1.0V to 5.5V per channel using its Dual Mode™ architecture. To set 2.5V or 1.8V, configure FB1/FB2 in adjustable mode (do not tie to VCC), then use a resistor divider from output to AGND with top resistor connected to FB pin. The internal error amplifier regulates FB to 1.0V, so VOUT = 1.0V × (1 + R1/R2). For 1.8V: R1/R2 = 0.8; for 2.5V: R1/R2 = 1.5. This configuration is validated across the full input range (4V–26V) and load conditions specified in the MAX8716ETG+TG50 electrical characteristics table.
MAX8716ETG+TG50 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Applications:
- -
- Voltage - Input:
- -
- Number of Outputs:
- -
- Voltage - Output:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX8716ETG+TG50 FAQ
1.How can I place an order for MAX8716ETG+TG50 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX8716ETG+TG50 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 MAX8716ETG+TG50 reliable?
The price and inventory of MAX8716ETG+TG50 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX8716ETG+TG50 is usually 5 days.
3.What payment methods are accepted for MAX8716ETG+TG50?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX8716ETG+TG50 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX8716ETG+TG50?
MAX8716ETG+TG50 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX8716ETG+TG50 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 MAX8716ETG+TG50?
For technical support, including MAX8716ETG+TG50 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX8716ETG+TG50 requirements.
6.How does Aetrix verify that MAX8716ETG+TG50 is sourced from the original manufacturer or authorized distributors?
All MAX8716ETG+TG50 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 MAX8716ETG+TG50 meets industry standards.
7.What is the process for return or replacement of MAX8716ETG+TG50?
All MAX8716ETG+TG50 units undergo pre-shipment inspection (PSI). If there is an issue with MAX8716ETG+TG50, 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 MAX8716ETG+TG50 part is unused and in its original packaging.
Return procedure for MAX8716ETG+TG50:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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