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Analog Devices Inc./Maxim Integrated MAX756EPA+
- Part No.:
- MAX756EPA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX756EPA+.pdf
- Description:
- IC REG BOOST PROG 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,077
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Product details
Overview
MAX756EPA+ from Maxim Integrated is a CMOS step-up DC-DC switching regulator in 8-pin plastic DIP package, designed for battery-powered systems requiring fixed 3.3V or 5V output. It operates down to 0.7V input, delivers up to 300mA at 3.3V or 200mA at 5V, achieves >87% efficiency at full load, and features integrated low-battery detection (LBI/LBO) and 60µA quiescent current.
For engineers reviewing the MAX756EPA+ datasheet, MAX756EPA+ pinout, MAX756EPA+ application, or MAX756EPA+ equivalent, this page provides verified technical context, real-world design meaning of specifications, validated pin functions, confirmed operating temperature range (–40°C to +85°C), and two field-tested alternative parts with documented functional trade-offs.
Technical Context
The MAX756EPA+ implements a constant-off-time pulse-frequency modulation (PFM) control scheme without an oscillator, enabling ultra-low quiescent current (60µA) while maintaining high efficiency (>87% at 200mA). Its internal 1A/0.5Ω N-channel MOSFET switch supports start-up from as low as 0.7V input and sustains operation down to <1V once running.
It integrates a precision 1.25V reference (±1.5% over temperature), active low-battery comparator (1.25V threshold with 25mV hysteresis), and logic-controlled output selection (3/5 pin sets 3.3V or 5V). All auxiliary pins (SHDN, LBI, LBO, REF, 3/5) tolerate voltages up to VOUT + 0.3V, and the device remains fully specified across –40°C to +85°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 0.7V min start-up; 2V–VOUT typical operating range - enables single-cell alkaline or NiMH battery use before regulation begins. |
| Output Voltage | Pin-selectable 3.3V ±3% or 5V ±3% - eliminates external feedback resistors and simplifies BOM for fixed-output designs. |
| Max Output Current | 300mA @ 3.3V / 200mA @ 5V - defines maximum sustained load capability under worst-case efficiency conditions. |
| Switching Frequency | Up to 500kHz - allows use of compact surface-mount magnetics (<5mm diameter) and reduces output filter size. |
| Quiescent Current | 60µA in active mode; 20µA in shutdown - extends battery life in intermittently active portable devices. |
| Reference Voltage | 1.25V ±1.5% over –40°C to +85°C - stable enough to drive external ADCs or comparators without additional buffering. |
| Low-Battery Threshold | 1.25V ±25mV hysteresis - provides reliable early-warning detection for 2-cell alkaline (2.4V → 1.2V per cell) or Li-ion (3.0V cutoff). |
Pinout & Package
MAX756EPA+ uses an 8-pin plastic DIP package (0.300" wide), with lead finish Sn/Pb, JEDEC MS-001 compliant, and thermal resistance θJA = 110°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 SHDN | Active-low shutdown control | Pulls low to disable SMPS; reference and LBI comparator remain powered - enables system-level power gating without losing battery monitoring. |
| 2 3/5 | Output voltage select | High = 3.3V output; Low = 5V output - direct logic-level interface eliminates need for level-shifting or pull-up/down resistors. |
| 3 REF | 1.25V precision reference output | Supplies 250µA max source / 20µA sink; bypass with 0.22µF - usable as stable ADC reference or bias source in same system. |
| 4 LBO | Open-drain low-battery indicator | Sinks current when LBI < 1.25V; requires external pull-up to VOUT - directly drives LEDs or microcontroller GPIOs without added transistors. |
| 5 LBI | Low-battery input sense | Compares VIN-derived voltage to internal 1.25V reference - connect via resistor divider from battery to set custom threshold (e.g., 2.4V for 2-cell). |
| 6 OUT | Regulated output connection | Provides bootstrapped gate drive for internal MOSFET and senses output voltage - must be connected directly to output capacitor with minimal trace length. |
| 7 GND | Power ground | Low-impedance return path for switch current and reference; solder directly to ground plane - critical for noise immunity and thermal performance. |
| 8 LX | Switch node | Drain of internal 1A/0.5Ω N-MOSFET; connects to inductor and Schottky diode - high di/dt node requiring short, wide traces and tight loop area. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low start-up voltage | 0.7V minimum - enables operation from nearly depleted single-cell batteries where other boosters fail to start. |
| Integrated low-battery monitor | Dedicated LBI input and open-drain LBO output - eliminates external comparator and reduces component count in portable medical or data-collection devices. |
| Fixed-output flexibility | Logic-selectable 3.3V/5V outputs - avoids trimming resistors and layout complexity of adjustable regulators while retaining system-level voltage choice. |
| High-efficiency PFM architecture | 87% typical full-load efficiency with no external compensation - delivers longer runtime than bipolar-based boosters and avoids PWM EMI concerns. |
| Extended temperature grade | –40°C to +85°C operating range - qualified for industrial and medical environments where commercial-grade parts (0°C to +70°C) would fail. |
Applications
| Glucose Meters | Palmtop Computers |
|---|---|
Use Scenario: Portable handheld device measuring blood glucose concentration using electrochemical test strips requiring stable 3.3V analog front-end and 5V display backlight. IC Role / Device Role / Timing Role: Primary step-up regulator supplying both analog sensing circuitry and digital subsystems from two AA batteries. Use Value: 0.7V start-up ensures full functionality even as batteries deplete below 1.0V/cell; integrated LBI triggers low-power alert before measurement error occurs. | Use Scenario: Compact computing platform with LCD display, flash memory, and serial interface, powered by 2–3 alkaline cells. IC Role / Device Role / Timing Role: Main power converter generating regulated 3.3V core logic supply and 5V peripheral bus voltage. Use Value: Pin-selectable output eliminates separate regulators; 60µA quiescent current extends standby time between user interactions. |
| Portable Data-Collectors | Medical Instrumentation |
Use Scenario: Ruggedized field device capturing sensor data (temperature, humidity, pressure) and storing it locally on SD card. IC Role / Device Role / Timing Role: Central DC-DC converter powering microcontroller, sensors, and storage interface from replaceable primary batteries. Use Value: –40°C to +85°C rating ensures reliability in outdoor deployments; LBO output directly signals host MCU to initiate graceful shutdown before brownout. | Use Scenario: Battery-operated diagnostic tool with analog signal conditioning, ADC, and wireless telemetry, used in clinical or home settings. IC Role / Device Role / Timing Role: Single-chip power solution delivering clean, regulated rails to sensitive analog stages and RF transceivers. Use Value: 1.25V reference with ±1.5% tolerance over temperature enables accurate sensor calibration without external reference ICs. |
Availability
MAX756EPA+ is available at Aetrix Electronics and suitable for portable medical instrumentation, handheld data collectors, and industrial palmtop computers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX756EPA+ 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, medical, and communications applications.
The MAX756 product line was designed specifically for ultra-low-voltage, battery-constrained portable systems needing efficient fixed-output step-up conversion with integrated power monitoring - targeting glucose meters, PDAs, and handheld test equipment.
FAQ
What is the operating temperature range for MAX756EPA+?
The MAX756EPA+ is rated for –40°C to +85°C operation, making it suitable for industrial and medical environments where commercial-grade variants (e.g., MAX756CPA, 0°C to +70°C) would not meet specification. This extended range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet.
Can MAX756EPA+ generate both 3.3V and 5V outputs?
Yes, the MAX756EPA+ supports pin-selectable outputs: driving the 3/5 pin high selects 3.3V output; pulling it low selects 5V output. This dual-voltage capability is intrinsic to the MAX756 family and does not require external feedback components - unlike the adjustable MAX757 variant which uses FB and resistor dividers.
Does MAX756EPA+ include low-battery detection?
Yes, MAX756EPA+ integrates a dedicated low-battery comparator with LBI input and open-drain LBO output. When the voltage at LBI falls below 1.25V (with 25mV hysteresis), LBO sinks current. The reference and comparator remain active even in shutdown mode, enabling continuous battery monitoring during system sleep.
What is the minimum input voltage required to start MAX756EPA+?
The MAX756EPA+ starts up from as low as 0.7V input under light load, as specified in the Electrical Characteristics table. This value is measured with ILOAD = 20mA and is production-tested. Once started, it can sustain operation down to <1V input due to internal bootstrapping from the OUT pin.
Is MAX756EPA+ pin-compatible with other MAX756 variants?
Yes, MAX756EPA+ shares identical pinout and electrical behavior with all other MAX756 variants (e.g., MAX756CPA, MAX756CSA), differing only in temperature grade and package type. The 8-pin DIP footprint and signal mapping (SHDN, 3/5, REF, LBO, LBI, OUT, GND, LX) are fully consistent across the MAX756 family.
MAX756EPA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 0.7V
- Voltage - Input (Max):
- 7V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-PDIP
MAX756EPA+ FAQ
1.How can I place an order for MAX756EPA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX756EPA+ 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 MAX756EPA+ reliable?
The price and inventory of MAX756EPA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX756EPA+ is usually 5 days.
3.What payment methods are accepted for MAX756EPA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX756EPA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX756EPA+?
MAX756EPA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX756EPA+ 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 MAX756EPA+?
For technical support, including MAX756EPA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX756EPA+ requirements.
6.How does Aetrix verify that MAX756EPA+ is sourced from the original manufacturer or authorized distributors?
All MAX756EPA+ 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 MAX756EPA+ meets industry standards.
7.What is the process for return or replacement of MAX756EPA+?
All MAX756EPA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX756EPA+, 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 MAX756EPA+ part is unused and in its original packaging.
Return procedure for MAX756EPA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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