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Analog Devices Inc./Maxim Integrated MAX711ESE+
- Part No.:
- MAX711ESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX711ESE+.pdf
- Description:
- IC REG BUCK BST ADJ 1.1A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,500
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Product details
Overview
MAX711ESE+ 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 operates from +1.8V to +11V input, delivers up to 500mA at 5V (VIN = 3.6V), supports output adjustment from +2.7V to +5.5V via external resistors, and features 0.2µA shutdown current. It is used in lithium- and alkaline-powered portable equipment requiring seamless voltage regulation across varying battery states.
For engineers reviewing the MAX711ESE+ datasheet, MAX711ESE+ pinout, MAX711ESE+ application, or MAX711ESE+ equivalent, key selection criteria include its dual-mode operation (high-efficiency vs. low-noise), programmable current limit (0.8A/1.5A), integrated low-battery comparator, thermal shutdown protection, and compatibility with single-cell Li+ or multi-cell alkaline inputs.
Technical Context
The MAX711ESE+ implements pulse-frequency modulation (PFM) with fixed 1µs off-time and variable on-time to control its internal N-channel power MOSFET. Its linear regulator uses a precision 1.25V reference and P-channel pass transistor to provide low-dropout regulation when VIN exceeds VOUT by ≥ VFV (~0.5V at 5V).
Operating mode selection is managed via the N/E pin: tied low for high-efficiency boost (LDO acts as switch), tied high for low-noise operation (LDO maintains headroom). The ILIM pin selects peak switch current limits (0.8A at PS, 1.5A at GND), directly affecting inductor sizing and transient response.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.8V to +11V - supports single-cell Li+ (2.7–4.2V), 2–4-cell alkaline (2.4–6.0V), and AC adapter backup without external level-shifting. |
| Output Voltage Range | +2.7V to +5.5V - adjustable via FB pin and external resistor divider; enables flexible system rail generation (e.g., 3.3V, 5.0V, or custom logic supply). |
| Max Output Current | 500mA at VIN = 3.6V, VOUT = 5V - sufficient for microcontroller-based peripherals, sensors, and display drivers in portable systems. |
| Shutdown Current | 0.2µA - minimizes battery drain during deep sleep, enabling multi-year shelf life in always-on monitoring devices. |
| Reference Voltage | 1.25V (±1.6% over -40°C to +85°C) - provides stable feedback for accurate output regulation and low-battery threshold setting. |
| Thermal Shutdown | +150°C with +20°C hysteresis - protects against sustained overload or poor PCB thermal design without requiring external thermal management. |
| Operating Temperature | -40°C to +85°C - qualified for industrial and extended-temperature portable applications including medical handhelds and ruggedized test equipment. |
Pinout & Package
MAX711ESE+ is housed in a 16-pin narrow SOIC (SO) package with 1.27mm pitch, JEDEC MS-012AC compliant, and rated for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LX (Pins 1, 16) | Switch Node | Drain connection of internal N-channel power MOSFET; connects to inductor and Schottky diode anode; requires low-inductance layout to minimize switching noise. |
| PGND (Pins 2, 15) | Power Ground | High-current return path for boost switch and LDO PFET; must be connected to low-impedance ground plane separate from analog ground. |
| SHDN (Pin 4) | Shutdown Control | Active-low digital input; pulls OUT to GND when low and reduces total supply current to 0.2µA - enables system-level power gating. |
| ILIM (Pin 3) | Current Limit Select | Configures peak switch current: GND = 1.5A (higher output capability), PS = 0.8A (smaller inductors, lower EMI). |
| STBY (Pin 5) | Standby Control | Disables boost converter only; keeps LDO active at 7µA quiescent current - preserves regulated output while reducing power consumption. |
| N/E (Pin 7) | Noise/Efficiency Mode | Selects operating mode: GND = high-efficiency (LDO acts as switch), PS = low-noise (LDO maintains ~0.5V headroom for ripple rejection). |
| 3/5 (Pin 6) | Output Voltage Select (MAX710 only) | Not functional on MAX711ESE+ - this pin is unused (NC) per datasheet; MAX711 uses FB pin for adjustable output. |
| LBO (Pin 8) | Low-Battery Output | Open-drain comparator output; goes low when LBI+ falls below LBI-; drives external LED or microcontroller interrupt for battery monitoring. |
| LBI− (Pin 10), LBI+ (Pin 11) | Comparator Inputs | LBI− typically tied to REF (1.25V); LBI+ connected to voltage divider from VIN - sets programmable low-battery detection threshold. |
| PS (Pin 12) | Power Supply Input | Main power input for internal circuitry; supplies both boost controller and LDO bias; must be bypassed with 0.1µF ceramic capacitor to GND. |
| REF (Pin 13) | Reference Output | 1.25V precision reference; used for FB feedback and LBI− input; requires 0.1µF ceramic bypass capacitor for stability. |
| GND (Pin 14) | Analog Ground | Low-impedance reference for error amplifiers and comparators; must be soldered directly to ground plane, isolated from noisy PGND paths. |
| OUT (Pin 9) | Regulated Output | Final regulated output; bypassed with 4.7µF capacitor for LDO stability and 100µF for bulk filtering; feeds downstream loads directly. |
| FB (Pin - not labeled on SO pinout but documented) | Feedback Input | Connects to resistor divider between OUT and GND; sets output voltage per VOUT = VREF × (1 + R1/R2); max input bias current 50nA. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Boost + LDO Architecture | Eliminates need for external FETs or discrete regulators - reduces BOM count and PCB area in space-constrained portable designs. |
| Two-Mode Operation (N/E Pin) | Enables trade-off between efficiency (≥85% typical) and output noise - critical for mixed-signal systems where ADC accuracy or RF sensitivity matters. |
| Programmable Peak Switch Current | 0.8A/1.5A selection via ILIM pin allows optimization of inductor size, cost, and transient response without changing IC footprint. |
| Built-in Low-Battery Comparator | Provides autonomous battery monitoring using only two external resistors - avoids MCU polling overhead and extends runtime in sleep modes. |
| Thermal Shutdown with Hysteresis | +150°C trip / +130°C recovery prevents thermal runaway during overload or poor heatsinking - improves field reliability without external sensors. |
| Ultra-Low Shutdown Current | 0.2µA ensures negligible battery depletion during storage or long-term standby - essential for remote sensors and IoT edge nodes. |
Applications
| Digital Cameras | Medical Handheld Devices |
|---|---|
Use Scenario: Compact digital cameras powered by single-cell Li+ batteries require stable 3.3V for image sensor and 5V for flash driver across full discharge curve (4.2V → 2.7V). IC Role / Device Role / Timing Role: MAX711ESE+ acts as primary power management IC, providing seamless step-up (when VIN < VOUT) and step-down (when VIN > VOUT) conversion without manual mode switching. Use Value: Maintains regulated output despite wide input variation, enabling consistent image capture quality and flash intensity throughout battery life. |
Use Scenario: Portable blood glucose meters use AA alkaline cells (1.5V × 2 = 3.0V nominal) but require precise 3.3V for analog front-end and 5.0V for LCD backlight. IC Role / Device Role / Timing Role: MAX711ESE+ serves as dual-rail power source, delivering clean, low-noise 3.3V (via N/E = PS) and 5.0V (via resistor divider) from declining input. Use Value: Low 50mVpp output ripple and 1.25V reference stability ensure accurate ADC measurements and reliable display operation. |
| Industrial Data Loggers | Wireless Sensor Nodes |
Use Scenario: Battery-operated loggers deployed in remote locations use 4×AA alkaline (6.0V fresh) but must operate down to 3.6V; require 3.3V for MCU and radio. IC Role / Device Role / Timing Role: MAX711ESE+ functions as main DC-DC converter, configured in high-efficiency mode (N/E = GND) to maximize runtime under light load (10–50mA). Use Value: 85% typical efficiency at 20mA and 0.2µA shutdown current extend operational life to >2 years on standard alkaline cells. |
Use Scenario: LoRaWAN end-nodes powered by CR2032 coin cell (3.0V) must generate 3.3V for transceiver and 1.8V for ultra-low-power MCU core. IC Role / Device Role / Timing Role: MAX711ESE+ operates in boost-only mode (VIN < VOUT), leveraging its 1.8V start-up capability and 7µA standby current for periodic wake-up bursts. Use Value: Ability to start from 1V input and sustain 7µA LDO current in STBY mode enables aggressive duty-cycling and multi-year battery life. |
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 | Higher 2A switch current, synchronous rectification, 96% peak efficiency, but requires external compensation and has no integrated LBO comparator. | Preferred for higher-current applications (>500mA) and where PCB area permits additional passive components; lacks built-in battery monitor. | Choose TPS63020DSJR when output current demand exceeds 500mA or when maximum efficiency is prioritized over integration density. |
| LT3582EFE#TRPBF | Wider input range (1.8V–16V), integrated soft-start, ±1% output accuracy, but larger 20-pin TSSOP package and no N/E mode selection. | Suitable for industrial systems needing tighter regulation tolerance and broader input tolerance; less optimal for compact consumer portables. | Choose LT3582EFE#TRPBF when ±1% output accuracy or 16V input capability is required, and board space allows larger package. |
Compared with TPS63020DSJR and LT3582EFE#TRPBF, the MAX711ESE+ offers superior integration for battery-powered portables - combining adjustable output, low-noise/high-efficiency mode selection, and autonomous low-battery detection in a compact 16-pin SOIC, at the expense of peak current and absolute efficiency.
Availability
MAX711ESE+ is available at Aetrix Electronics and suitable for digital cameras, medical handheld devices, industrial data loggers, wireless sensor nodes, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX711ESE+ 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 ICs for industrial, automotive, communications, and consumer applications.
The MAX711ESE+ belongs to Maxim's legacy power management portfolio designed specifically for battery-powered portable electronics requiring seamless voltage conversion across wide input ranges without external FETs or complex control circuitry.
FAQ
What is the minimum input voltage required for MAX711ESE+ to start up?
The MAX711ESE+ can start up from as low as 1.0V input under typical conditions. This capability enables reliable operation even with deeply discharged single-cell Li+ batteries or aging alkaline cells, ensuring uninterrupted functionality in portable devices before battery replacement is needed. The startup behavior is verified across -40°C to +85°C.
How do I configure MAX711ESE+ for a 3.3V output?
To configure MAX711ESE+ for 3.3V output, connect the FB pin to a resistor divider between OUT and GND such that VFB = 1.25V. Using R2 = 301kΩ and R1 = 499kΩ yields VOUT = 1.25V × (1 + 499k/301k) ≈ 3.30V. The MAX711ESE+ datasheet specifies FB input bias current ≤50nA, so these high-value resistors introduce negligible error.
Does MAX711ESE+ support true step-down (buck) operation?
No - the MAX711ESE+ does not implement synchronous buck topology. Instead, it performs step-down via its integrated P-channel LDO linear regulator, which activates when VIN exceeds VOUT by ≥ VFV (~0.5V at 5V). This architecture provides simplicity and low noise but sacrifices efficiency compared to switching buck converters at high VIN/VOUT ratios.
Can MAX711ESE+ be used with lithium-polymer batteries?
Yes - the MAX711ESE+ is fully compatible with lithium-polymer batteries, supporting their full discharge range (4.2V → 2.7V). Its +1.8V to +11V input range, 1V start-up capability, and ability to regulate both above and below nominal cell voltage make it ideal for LiPo-powered portable instruments, wearables, and handheld scanners.
What is the purpose of the N/E pin on MAX711ESE+?
The N/E (Noise/Efficiency) pin on MAX711ESE+ selects between two operating modes: tying N/E to GND enables high-efficiency mode (LDO acts as a switch during boost), while tying N/E to PS enables low-noise mode (LDO maintains ~0.5V headroom for superior ripple rejection). This pin directly impacts output spectral purity and conversion efficiency.
MAX711ESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX711ESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX711ESE+ 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+ reliable?
The price and inventory of MAX711ESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX711ESE+ is usually 5 days.
3.What payment methods are accepted for MAX711ESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX711ESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX711ESE+?
MAX711ESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX711ESE+ 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+?
For technical support, including MAX711ESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX711ESE+ requirements.
6.How does Aetrix verify that MAX711ESE+ is sourced from the original manufacturer or authorized distributors?
All MAX711ESE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX711ESE+?
All MAX711ESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX711ESE+, 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+ part is unused and in its original packaging.
Return procedure for MAX711ESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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