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Analog Devices Inc./Maxim Integrated MAX77720SANP+T
- Part No.:
- MAX77720SANP+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 20-XFBGA, WLBGA
- Datasheet:
-
MAX77720SANP+T.pdf
- Description:
- IC REG BUCK BOOST ADJ DL 20WLP
- Quantity:
- Payment:
- Shipping:
Inventory:1,318
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Product details
Overview
MAX77720SANP+T from Analog Devices is a dual-polarity power management IC integrating an inverting buck-boost (IBB) regulator and a boost regulator. It delivers up to +20V positive output and down to -24V negative output, operates at fixed 1MHz (boost) and 1.5MHz (IBB) switching frequencies, supports I²C configuration, and targets ToF sensor and OLED display biasing in compact IoT devices.
For engineers reviewing the MAX77720SANP+T datasheet, MAX77720SANP+T pinout, MAX77720SANP+T application, or MAX77720SANP+T equivalent, key selection criteria include independent bipolar voltage programming, thermal/overcurrent protection, true shutdown capability, and wafer-level package compatibility with space-constrained embedded designs.
Technical Context
The MAX77720SANP+T implements two independent DC-DC topologies: a synchronous boost converter for positive rail generation and an inverting buck-boost for negative rail synthesis. Each regulator features programmable peak current limits (0.5A–1.0A for boost), soft-start control, and dedicated fault monitoring via nERR and nIRQ pins.
Its bidirectional I²C interface enables real-time status readback and dynamic reconfiguration of output voltages, power-up/power-down delays (0.2ms–3.2ms per rail), and OTP-configurable startup sequencing - all within a single 20-bump WLP measuring 2.15mm × 1.80mm × 0.5mm.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 5.5V - compatible with single-cell Li-ion or USB-powered systems. |
| Positive Output Range | +0.5V to +20V - programmable via external feedback resistors or I²C register writes. |
| Negative Output Range | -24V to -1.5V - supports high-voltage biasing for ToF sensor arrays and OLED cathodes. |
| Switching Frequencies | Boost: fixed 1MHz; IBB: fixed 1.5MHz - enables compact external passive component selection. |
| Peak Current Limit (Boost) | Configurable from 0.5A to 1.0A - balances efficiency vs. transient response under varying load conditions. |
| Operating Temperature | -40°C to +125°C - qualified for industrial and automotive-adjacent IoT edge applications. |
| Quiescent Current | 235μA (main bias on) - minimizes standby power in battery-operated devices. |
Pinout & Package
MAX77720SANP+T uses a 20-bump wafer-level package (WLP), 2.15mm × 1.80mm × 0.5mm, 0.4mm pitch, 5 × 4 bump array. The package is RoHS-compliant and optimized for minimal PCB footprint in ultra-compact portable electronics.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Main input supply | Accepts 2.5V–5.5V input; powers internal bias and both regulators. |
| EN | Enable control | Active-high logic input; initiates power-up sequence when asserted. |
| nERR | Error signaling | Open-drain output that asserts low during fault; can be used to disable external circuitry. |
| nIRQ | Interrupt request | Open-drain interrupt pin indicating regulator status changes or fault events. |
| SCL / SDA | I²C interface | Bidirectional serial bus for configuration, monitoring, and error clearing. |
| PGNDBST / GNDIBB | Power ground returns | Separate ground paths for boost and inverting buck-boost sections reduce noise coupling. |
| LXBST / LXIBB | Switch node outputs | High-frequency switching nodes connecting to external inductors and diodes. |
| FBBST / FBIBB | Feedback inputs | Resistor-divider inputs for precise regulation of positive and negative output voltages. |
| OUTBST / INIBB | Output and IBB input | Boost output (positive rail); IBB input tied to boost output for negative rail generation. |
| POK | Power-good monitor | Open-drain output asserting high when both regulated outputs are within tolerance. |
Key Features
| Feature | Design Value |
|---|---|
| True Shutdown™ for Boost | Disables boost output completely with near-zero leakage, eliminating reverse current and enabling clean system power-down. |
| Programmable Rail Sequencing | Independent 0.2ms–3.2ms power-up/down delays per rail prevent latch-up and ensure safe biasing of sensitive sensors. |
| Factory OTP Configuration | Enables pre-programmed startup defaults (e.g., output voltages, delay timing), reducing firmware initialization overhead. |
| Thermal & Overcurrent Protection | Integrated OTLO (+165°C threshold) and OCP with auto-recovery prevent damage during overload or ambient temperature excursions. |
| VIO Compatibility | Supports 1.2V–3.6V I/O voltage - allows direct interfacing with low-voltage microcontrollers without level-shifting. |
Applications
| ToF Sensor Biasing | OLED Display Power |
|---|---|
Use Scenario: Powers time-of-flight (ToF) image sensors requiring tightly regulated ±15V rails for VCSEL drivers and receiver front-ends. IC Role / Device Role / Timing Role: Dual-rail PMIC generating synchronized positive and negative bias voltages with controlled startup timing. Use Value: Eliminates discrete charge pumps and LDOs, reducing BOM count by ≥4 components while maintaining <±1.5% output accuracy. | Use Scenario: Supplies gate driver and cathode bias voltages for active-matrix OLED (AMOLED) panels in smart wearables. IC Role / Device Role / Timing Role: Generates +12V anode supply and -10V cathode bias with independent enable control and fast transient response. Use Value: Enables rapid panel wake-up (<3.2ms) and black-level stability through programmable rail sequencing and low-noise 1MHz/1.5MHz switching. |
| Bipolar Amplifier Supply | Industrial Sensor Interface |
Use Scenario: Provides symmetrical ±12V supplies for precision instrumentation amplifiers in portable test equipment. IC Role / Device Role / Timing Role: Dual-output regulator delivering matched positive/negative rails with independent voltage programming. Use Value: Achieves <0.1% cross-regulation between rails, minimizing offset drift in high-gain analog signal chains. | Use Scenario: Powers MEMS-based inertial measurement units (IMUs) and environmental sensors needing isolated bipolar biasing. IC Role / Device Role / Timing Role: Compact PMIC supplying ±5V rails with integrated fault flagging and I²C telemetry for predictive maintenance. Use Value: Reduces PCB area by 3.86mm² versus discrete solutions while enabling real-time health monitoring via nIRQ and register reads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-polarity PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65136RTER | Fixed +15V/-15V outputs; no I²C interface; 3mm × 3mm QFN-16 package. | Limited to fixed-output applications; lacks programmability and rail sequencing. | Select when cost-sensitive, fixed-rail designs prioritize simplicity over configurability. |
| LT3905EDE#TRPBF | Single-channel inverting buck-boost only; requires external boost stage; 16-lead DFN package. | Not a drop-in replacement; demands additional external components for dual-rail operation. | Choose only if design already uses LT3905 and requires incremental negative rail extension. |
Compared with TPS65136RTER and LT3905EDE#TRPBF, the MAX77720SANP+T uniquely integrates fully programmable dual-rail generation, I²C telemetry, and wafer-level packaging - enabling smaller footprints, faster time-to-market for configurable IoT sensor platforms, and robust fault handling without added discrete circuitry.
Availability
MAX77720SANP+T is available at Aetrix Electronics and suitable for ToF sensor modules, AMOLED display subsystems, and bipolar amplifier power supplies requiring stable component supply across production ramps and long-lifecycle deployments.
Supply support for MAX77720SANP+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and consumer markets.
The MAX77720SANP+T belongs to the MAX77xxx family of highly integrated power management ICs designed specifically for space-constrained, battery-powered IoT endpoints requiring flexible, high-voltage bipolar biasing with intelligent system control.
FAQ
What is the maximum negative output voltage supported by the MAX77720SANP+T?
The MAX77720SANP+T supports a programmable negative output voltage down to -24V. This capability is implemented through its integrated inverting buck-boost (IBB) regulator, which accepts input from the boost output or main supply and synthesizes the negative rail using external inductor and diode components. The -24V limit is specified under recommended operating conditions and verified across the full -40°C to +125°C junction temperature range.
Does the MAX77720SANP+T support independent enable control for each output rail?
Yes, the MAX77720SANP+T supports independent power-up and power-down sequencing for its positive and negative outputs via I²C registers CNFG_DCDC0.EN_BST and CNFG_DCDC0.EN_IBB. Delays are programmable from 0.2ms to 3.2ms per rail, allowing precise timing control to prevent latch-up in sensitive downstream circuits like ToF sensor arrays or OLED pixel drivers.
How does the nERR pin function in the MAX77720SANP+T?
The nERR pin on the MAX77720SANP+T is an open-drain error indicator that asserts low during fault conditions such as overtemperature, overcurrent, or output short-circuit. When connected to an external device's input, it signals fault occurrence. The error state can be cleared via I²C write to CNFG_GLBL.EN_IBB or CNFG_GLBL.EN_BST, re-enabling the affected regulator without requiring hardware reset.
What package type and dimensions does the MAX77720SANP+T use?
The MAX77720SANP+T uses a 20-bump wafer-level package (WLP) with outline number 21-100659. Its physical dimensions are 2.15mm × 1.80mm × 0.5mm, with a 0.4mm bump pitch arranged in a 5 × 4 array. This ultra-compact package is RoHS-compliant and optimized for high-density portable electronics where board space is constrained.
Can the MAX77720SANP+T operate with a 1.8V I/O voltage?
Yes, the MAX77720SANP+T supports VIO from 1.2V to 3.6V, making it compatible with 1.8V microcontroller I/O interfaces. Its SCL and SDA pins are VIO-referenced, and internal level-shifting ensures reliable I²C communication without external translators - simplifying integration into low-voltage embedded systems while maintaining full register access and fault reporting capability.
MAX77720SANP+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-XFBGA, WLBGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive and Negative
- Topology:
- Boost, Buck-Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 2
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- 20V, -24V
- Current - Output:
- -
- Frequency - Switching:
- 1MHz, 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WLP (2.12x1.77)
MAX77720SANP+T FAQ
1.How can I place an order for MAX77720SANP+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX77720SANP+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 MAX77720SANP+T reliable?
The price and inventory of MAX77720SANP+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX77720SANP+T is usually 5 days.
3.What payment methods are accepted for MAX77720SANP+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX77720SANP+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX77720SANP+T?
MAX77720SANP+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX77720SANP+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 MAX77720SANP+T?
For technical support, including MAX77720SANP+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX77720SANP+T requirements.
6.How does Aetrix verify that MAX77720SANP+T is sourced from the original manufacturer or authorized distributors?
All MAX77720SANP+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 MAX77720SANP+T meets industry standards.
7.What is the process for return or replacement of MAX77720SANP+T?
All MAX77720SANP+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX77720SANP+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 MAX77720SANP+T part is unused and in its original packaging.
Return procedure for MAX77720SANP+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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