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Analog Devices Inc./Maxim Integrated MAX711ESE+T
- Part No.:
- MAX711ESE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX711ESE+T.pdf
- Description:
- IC REG BUCK BST ADJ 1.1A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
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Product details
Overview
The MAX711ESE+T from Maxim Integrated is an adjustable step-up/down DC-DC converter IC integrating a PFM-controlled N-channel boost stage and a P-channel LDO linear regulator. It accepts 1.8V–11V input, delivers 2.7V–5.5V output at up to 500mA (VIN = 3.6V), achieves 85% typical efficiency in boost mode, and operates across –40°C to +85°C in a 16-pin narrow SO package - ideal for lithium- or multi-cell alkaline-powered portable equipment requiring seamless voltage regulation above and below battery voltage.
For engineers reviewing the MAX711ESE+T datasheet, MAX711ESE+T pinout, MAX711ESE+T application, or MAX711ESE+T equivalent, key selection criteria include its dual-mode operation (high-efficiency vs. low-noise via N/E pin), programmable output (via FB/REF), integrated low-battery comparator (LBI+/LBI-/LBO), shutdown current of 0.2µA, and configurable peak inductor current limit (0.8A/1.5A via ILIM).
Technical Context
The MAX711ESE+T implements a hybrid architecture: a pulse-frequency-modulated (PFM) boost converter with internal 1.5A/0.8A selectable N-MOSFET switch (LX pin), paired with a precision 1.25V reference-shared P-MOSFET LDO (OUT pin). Its dual-regulation topology enables continuous regulation when VIN < VOUT (boost) or VIN > VOUT (linear drop-out), with mode selection governed by the N/E pin controlling headroom (VFV ≈ 0.5V) across the LDO.
It features integrated functions including a low-battery comparator (LBI+/LBI-/LBO), shutdown (SHDN) with active GND pull-down on OUT, standby (STBY) disabling only the boost stage (IQ = 7µA), and feedback-based output adjustment (FB pin, 1.25V reference, ±1% FB voltage tolerance). All logic inputs (SHDN, STBY, N/E, 3/5, ILIM) tolerate rail-to-rail voltages up to VPS + 0.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.8V to +11V - supports single Li-ion, 2–4 AA/AAA alkaline, or AC adapter inputs without external level shifting. |
| Output Voltage Range | +2.7V to +5.5V (adjustable via FB/REF) - enables precise system rail matching using two external resistors. |
| Max Output Current | 500mA at VIN = 3.6V, VOUT = 5V - sufficient for microcontrollers, sensors, and RF modules in portable designs. |
| Shutdown Quiescent Current | 0.2µA - minimizes battery drain during deep sleep, critical for long-life battery-powered devices. |
| Reference Voltage | 1.25V (±1% over –40°C to +85°C) - provides stable feedback basis for accurate output regulation and low-battery threshold setting. |
| FB Input Bias Current | ≤50nA - allows use of high-value resistor dividers (e.g., 100kΩ–1MΩ) without significant voltage error or power loss. |
| LX Switch On-Resistance | 0.6Ω (typ) - reduces conduction loss in boost path, supporting high efficiency at medium loads. |
Pinout & Package
MAX711ESE+T is housed in a 16-pin narrow SOIC (SOIC-N) package, 3.9mm width, 1.27mm pitch, with exposed pad not present. Pin 1 is marked by a beveled corner or dot; top-side marking includes "MAX711" and date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (1,16) | Internal N-MOSFET Drain | Switch node connecting to external inductor; carries pulsed high-current boost waveform - requires short, low-inductance PCB routing. |
| PGND (2,15) | Power Ground | High-current return path for boost switch and LDO PFET - must be tied directly to ground plane with multiple vias. |
| SHDN (4) | Active-Low Shutdown Control | Pulls OUT to GND when low; disables entire IC with 0.2µA supply current - used for system-level power gating. |
| ILIM (3) | Peak Inductor Current Select | GND = 1.5A limit (for higher output current); PS = 0.8A limit (enables smaller, lower-cost inductors). |
| STBY (5) | Standby Mode Enable | GND = disable boost converter only; LDO remains active at 7µA IQ - maintains regulated output while saving power. |
| N/E (7) | Noise/Efficiency Mode Select | GND = high-efficiency (LDO acts as switch, minimal VFV); PS = low-noise (LDO maintains ~0.5V headroom for ripple rejection). |
| 3/5 (6) | Output Voltage Selection (MAX710 only) | Not connected on MAX711ESE+T - MAX711 uses FB/REF for adjustment; this pin is NC and must be left floating or tied to PS per layout guidelines. |
| LBO (8) | Low-Battery Comparator Output | Open-drain active-low flag - drives external circuitry or µC interrupt when battery falls below programmed threshold. |
| LBI− (10), LBI+ (11) | Comparator Inputs | LBI− typically tied to REF (1.25V); LBI+ connected to voltage divider from VIN - sets precise low-battery detection point. |
| PS (12) | Power Supply Input | Main IC supply derived from boost output - powers internal circuits, reference, comparators, and gate drivers. |
| REF (13) | 1.25V Precision Reference Output | Bypassed with 0.1µF capacitor to GND - serves as feedback reference and LBI− input for battery monitor. |
| GND (14) | Analog Ground | Low-impedance analog reference point - must be soldered directly to ground plane, separate from noisy PGND traces. |
| OUT (9) | Regulated Output | Final system rail; bypassed with 4.7µF capacitor for LDO stability and ≥100µF for ripple filtering - connects to load directly. |
| FB (-) | Feedback Input | Connects to resistor divider from OUT to GND - sets output voltage per VOUT = 1.25V × (1 + R1/R2); bias current ≤50nA enables high-R dividers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boost + LDO Architecture | Enables seamless step-up/down conversion without external FETs or controllers - reduces BOM count and board area. |
| Configurable Efficiency/Noise Trade-off | N/E pin selects between 85% typical boost efficiency (N/E = GND) or enhanced ripple rejection (N/E = PS, ~10% lower efficiency). |
| Programmable Output Voltage | 2.7V–5.5V set via external resistor divider on FB pin - supports diverse system rails without discrete regulators. |
| Ultra-Low Shutdown Current | 0.2µA maximum - extends shelf life and runtime in battery-backed systems requiring infrequent wake-ups. |
| Built-in Low-Battery Detection | Dedicated comparator with hysteresis (±25mV offset, 40mV typ hysteresis) - eliminates need for external supervisor IC. |
| Selectable Peak Inductor Current | 0.8A (ILIM = PS) or 1.5A (ILIM = GND) - allows optimization of inductor size, cost, and saturation margin per application. |
Applications
| Digital Cameras | Portable Medical Monitors |
|---|---|
Use Scenario: Compact digital cameras powered by single Li-ion or dual AA cells require stable 3.3V for image sensor and 5V for flash LED driver, with input voltage varying from 4.2V (charged) down to 2.8V (discharged). IC Role / Device Role / Timing Role: MAX711ESE+T acts as primary power management IC, providing regulated 3.3V and 5V rails regardless of battery state - boosting when VIN < VOUT and linearly regulating when VIN > VOUT. Use Value: Eliminates need for separate boost and LDO ICs; 85% efficiency at 100–300mA extends capture time; low-noise mode suppresses switching artifacts in analog sensor paths. |
Use Scenario: Handheld ECG or pulse oximeter units operate from 2–4 alkaline cells (2.4V–6.0V), powering mixed-signal ASICs, OLED displays, and Bluetooth radios requiring clean 3.3V and 5V supplies. IC Role / Device Role / Timing Role: MAX711ESE+T serves as the central voltage translator, maintaining tight output regulation across wide input range while enabling battery fuel gauging via LBI+/LBI−. Use Value: Integrated low-battery comparator triggers alert before critical shutdown; standby mode (7µA) preserves display backlight during idle; adjustable output matches ASIC core voltage requirements. |
| Industrial Handheld Scanners | Wireless Sensor Nodes |
Use Scenario: Rugged barcode scanners use 3×AA alkaline batteries (4.5V fresh, ~3.0V depleted) and demand 5V for laser diode driver and 3.3V for MCU/RF, with strict EMI limits in factory environments. IC Role / Device Role / Timing Role: MAX711ESE+T delivers both rails from one IC, with N/E pin configured for low-noise mode during laser activation to prevent switching noise coupling into analog front-end. Use Value: PFM control ensures low-noise operation at light loads; 0.2µA shutdown current enables multi-year battery life in storage; SOIC package supports automated assembly. |
Use Scenario: LoRaWAN or NB-IoT sensor nodes powered by coin-cell or small Li-SOCl₂ batteries (2.0V–3.6V) require ultra-low-quiescent 3.3V for MCU and radio, with intermittent 100ms transmit bursts drawing 150mA. IC Role / Device Role / Timing Role: MAX711ESE+T operates in high-efficiency mode (N/E = GND) to maximize energy extraction from low-VIN sources, while FB-adjustable output matches radio's optimal supply voltage. Use Value: 1.8V start-up capability enables operation down to near-dead battery; 7µA standby current preserves battery during 99% sleep duty cycle; compact SOIC footprint fits constrained PCBs. |
Availability
MAX711ESE+T is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, wireless sensor nodes, digital cameras, and battery-powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX711ESE+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) is a U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management solutions for industrial, automotive, communications, and consumer applications.
The MAX710/MAX711 product line was designed specifically for battery-powered portable electronics needing seamless step-up/down voltage conversion - addressing challenges of shrinking battery voltage envelopes and rising system rail complexity in space-constrained devices.
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up/down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Single-inductor buck-boost with 2.5V–5.5V output, 96% peak efficiency, but no integrated low-battery comparator or standalone REF output. | Requires external supervisor for battery monitoring; better suited for high-efficiency, high-current (>1A) apps where size is critical. | Choose TPS63020DSJR when highest efficiency and smallest solution size are priorities, and battery monitoring is handled elsewhere. |
| LT3580EMS#TRPBF | Adjustable buck-boost with 1.2V–16V input, 1.25V–15V output, 2.5A switch, but lacks integrated LDO post-regulator and low-noise mode control. | Delivers higher current but introduces more output ripple; requires external LDO for noise-sensitive loads. | Choose LT3580EMS#TRPBF when output current >500mA is needed and system can accommodate additional filtering or external LDO. |
Compared with MAX711ESE+T, the TPS63020DSJR offers superior efficiency and integration density but omits critical analog features like the precision reference and comparator; the LT3580EMS#TRPBF provides higher current capability but shifts noise management burden to external components - making MAX711ESE+T uniquely balanced for mid-power, battery-monitoring-aware portable designs.
FAQ
What is the minimum input voltage required for MAX711ESE+T to start up and regulate?
The MAX711ESE+T typically starts up with a 1V input under no-load conditions, as confirmed in the Typical Operating Characteristics section (TOC03). At full load (250mA), the minimum start-up voltage rises to approximately 1.2V for VOUT = 5V and 1.0V for VOUT = 3.3V. This ultra-low start-up capability enables operation down to nearly depleted alkaline or lithium cells, extending usable battery life in portable applications using the MAX711ESE+T.
How do I configure MAX711ESE+T for a 3.3V output?
To configure the MAX711ESE+T for a 3.3V output, connect the FB pin to a resistor divider between OUT and GND, using the formula R1 = R2 × ((VOUT / 1.25V) − 1). For example, with R2 = 309kΩ, R1 = 511kΩ yields 3.3V. The MAX711ESE+T does not use the 3/5 pin - that pin is reserved for the MAX710 and must be left unconnected or tied to PS per layout guidance. Always bypass REF with 0.1µF and OUT with ≥4.7µF.
Does MAX711ESE+T support true shutdown disconnecting input from output?
Yes, the MAX711ESE+T provides true input-to-output disconnect in shutdown mode. When SHDN is pulled low, the internal circuitry fully disables, and the OUT pin is actively pulled to GND via an internal switch - isolating the load from the input source. This results in only 0.2µA supply current (ISHDN), preventing battery drain during storage or system off-states, a key design feature explicitly documented in the General Description and Electrical Characteristics tables for the MAX711ESE+T.
What is the purpose of the N/E pin on MAX711ESE+T, and how does it affect performance?
The N/E (Noise/Efficiency) pin on the MAX711ESE+T selects between two operating modes: tying N/E to GND enables high-efficiency mode (LDO acts as a low-VF switch during boost, yielding ~85% efficiency), while tying N/E to PS enables low-noise mode (LDO maintains ~0.5V headroom for superior ripple rejection, at ~10% lower efficiency). This pin directly controls the trade-off between power savings and signal integrity - critical for mixed-signal portable systems using the MAX711ESE+T.
Can MAX711ESE+T be used with a 12V input?
No, the MAX711ESE+T has an absolute maximum input rating of +11.5V on PS, LX, and OUT pins, and a recommended operating input range of +1.8V to +11V per the Absolute Maximum Ratings and General Description. Applying 12V exceeds the specified limit and risks permanent damage. For 12V input applications, a pre-regulator stage or alternative IC rated for higher VIN - such as the LT3580 or TPS63060 - must be used instead of the MAX711ESE+T.
MAX711ESE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.8V
- Voltage - Input (Max):
- 11V
- Voltage - Output (Min/Fixed):
- 2.7V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 1.1A (Switch)
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX711ESE+T FAQ
1.How can I place an order for MAX711ESE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX711ESE+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 MAX711ESE+T reliable?
The price and inventory of MAX711ESE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX711ESE+T is usually 5 days.
3.What payment methods are accepted for MAX711ESE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX711ESE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX711ESE+T?
MAX711ESE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX711ESE+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 MAX711ESE+T?
For technical support, including MAX711ESE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX711ESE+T requirements.
6.How does Aetrix verify that MAX711ESE+T is sourced from the original manufacturer or authorized distributors?
All MAX711ESE+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 MAX711ESE+T meets industry standards.
7.What is the process for return or replacement of MAX711ESE+T?
All MAX711ESE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX711ESE+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 MAX711ESE+T part is unused and in its original packaging.
Return procedure for MAX711ESE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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