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Analog Devices Inc./Maxim Integrated MAX682ESA+
- Part No.:
- MAX682ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX682ESA+.pdf
- Description:
- IC REG CHARG PUMP 5V 250MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:933
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Product details
Overview
MAX682ESA+ from Maxim Integrated is a 5V charge-pump voltage regulator IC designed for compact, high-efficiency auxiliary power conversion. It delivers up to 250mA output current from a 2.7V–5.5V input, operates in skip or constant-frequency mode (50kHz–2MHz), maintains ±4% regulated output voltage, and requires only one resistor and three external capacitors-no inductors. It serves as a space-constrained 3.3V-to-5V local converter in battery-powered miniature equipment.
For engineers reviewing the MAX682ESA+ datasheet, MAX682ESA+ pinout, MAX682ESA+ application, or MAX682ESA+ equivalent, key selection considerations include its 250mA output capability, SO-8 package, shutdown-controlled oscillator frequency, 0.1µA shutdown current, and tradeoff between skip-mode efficiency and constant-frequency ripple performance.
Technical Context
The MAX682ESA+ integrates an error amplifier, 1.23V bandgap reference, internal resistive feedback network, oscillator, high-current MOSFET switches, and dual-function SHDN logic. Its regulation architecture supports two distinct modes: skip mode (low-quiescent-current, variable-frequency operation) and constant-frequency mode (fixed switching frequency, lower output ripple).
Skip mode disables switching when output exceeds 5V, reducing no-load supply current to 100µA; constant-frequency mode enables precise ripple control via externally set oscillator frequency (determined by SHDN pin current and input voltage), with mandatory use above 3.6V input. Undervoltage lockout activates below 2.25V with 100mV hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Regulated 5.05V ±4% - ensures stable 5V rail for logic or interface circuitry without external feedback. |
| Max Output Current | 250mA continuous - supports moderate-power peripherals like flash memory or PCMCIA card logic. |
| Input Voltage Range | 2.7V–5.5V (SKIP = high); 2.7V–3.6V (SKIP = low) - enables direct use with Li-ion, 3.3V, or 5V supply rails. |
| Switching Frequency | 50kHz–2MHz (externally adjustable via SHDN current) - allows optimization of capacitor size vs. EMI vs. light-load efficiency. |
| Quiescent Current | 100µA in pulse-skipping mode - extends battery life in standby or low-duty-cycle applications. |
| Shutdown Current | 0.1µA - minimizes system-level leakage during deep sleep or power-off states. |
| Load Regulation | ±3% over full load range - maintains tight voltage stability across dynamic load changes. |
Pinout & Package
The MAX682ESA+ is housed in an 8-pin SO (Small Outline) package, 1.75mm height, industry-standard footprint compatible with automated assembly and thermal relief design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SKIP | Mode select input | Logic-low enables skip mode (low IQ); logic-high forces constant-frequency mode (required for VIN > 3.6V). |
| 2 - SHDN | Dual-function control pin | Drives shutdown when pulled low; sets oscillator frequency via sourced current (1–50µA) when biased through REXT. |
| 3 - IN | Main power input | Accepts 2.7V–5.5V supply; bypassed to PGND with ≥1µF capacitor to suppress input ripple and noise. |
| 4 - GND | Analog ground reference | Low-impedance return path for error amplifier and bandgap; must be short-traced to PGND. |
| 5 - PGND | Power ground terminal | High-current return for MOSFET switches and charge-pump capacitor; separate from GND to reduce noise coupling. |
| 6 - CXN | Negative charge-pump node | Connects to negative terminal of transfer capacitor (CX); carries high di/dt switching current. |
| 7 - CXP | Positive charge-pump node | Connects to positive terminal of transfer capacitor (CX); critical for charge transfer timing and efficiency. |
| 8 - OUT | Regulated 5V output | Delivers up to 250mA; requires ≥2.2µF low-ESR ceramic or tantalum capacitor to PGND for ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates magnetic components, reducing PCB area, EMI, and BOM cost in space-constrained designs. |
| 1µF/100mA capacitor sizing | Enables ultra-compact external component count - e.g., 1µF CIN + 0.47µF CX + 2.2µF COUT for MAX682 at 250mA. |
| Dual-mode regulation | Engineers choose skip mode for battery runtime or constant-frequency mode for noise-sensitive analog/peripheral rails. |
| Integrated UVLO with hysteresis | Prevents erratic output collapse below 2.25V input and ensures clean restart after brownout recovery. |
| 0.1µA shutdown current | Supports multi-year shelf life in backup-battery or energy-harvesting applications where leakage dominates drain. |
Applications
| Flash Memory Supplies | Battery-Powered Applications |
|---|---|
Use Scenario: Providing regulated 5V to NAND/NOR flash during program/erase cycles in portable data loggers. IC Role / Device Role / Timing Role: Auxiliary voltage regulator delivering 250mA peak current with fast line/load transient response. Use Value: Eliminates need for bulky inductor-based DC/DC converters while maintaining VCC stability under pulsed 5V loads. | Use Scenario: Powering GSM SIMM cards and PCMCIA peripherals from single-cell Li-ion (3.0–4.2V) batteries. IC Role / Device Role / Timing Role: 3.3V-to-5V local boost converter operating in skip mode to maximize battery runtime. Use Value: Achieves >85% efficiency at 10mA load with 100µA quiescent current, extending operational time between charges. |
| Miniature Equipment | 3.3V to 5V Local Conversion |
Use Scenario: Generating 5V for USB interface logic or sensor signal conditioning in handheld medical devices. IC Role / Device Role / Timing Role: Compact, low-profile power solution in SO-8 package fitting ≤3mm board height constraints. Use Value: Enables full 5V functionality without compromising mechanical envelope - critical for pen-sized diagnostics tools. | Use Scenario: Up-converting 3.3V system rail to 5V for legacy I/O buffers or level-shifting circuits on embedded controllers. IC Role / Device Role / Timing Role: Fixed-output charge pump replacing discrete boost stages in FPGA or microcontroller peripheral domains. Use Value: Reduces design complexity and layout risk versus custom inductor-based solutions while meeting ±4% regulation spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX683EUA+ | Same architecture but rated for 100mA max output; packaged in 8-pin µMAX (1.1mm height). | Lower output current suits ultra-compact, low-power applications where 250mA is excessive. | Select MAX683EUA+ when board height <1.2mm is required and load current ≤100mA. |
| TPS60403DBVR | TI's 5V charge pump with 60mA output, fixed 500kHz frequency, and 1.5µA quiescent current in shutdown. | Lacks skip/constant-frequency mode selection and external frequency tuning; optimized for lowest IQ, not highest current. | Choose TPS60403DBVR for sub-60mA applications prioritizing ultra-low shutdown current over flexibility. |
Compared with MAX682ESA+, MAX683EUA+ offers identical regulation architecture in a lower-profile package but halves output capability, while TPS60403DBVR trades configurability for minimized shutdown leakage and fixed-frequency simplicity - making MAX682ESA+ optimal for 200–250mA, height-tolerant, frequency-tunable designs.
Availability
MAX682ESA+ is available at Aetrix Electronics and suitable for flash memory supplies, battery-powered miniature equipment, and 3.3V-to-5V local conversion applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX682ESA+ 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, communications, and consumer markets.
The MAX682ESA+ belongs to Maxim's charge-pump regulator product line, engineered specifically for compact, inductorless 3.3V-to-5V conversion in space- and power-constrained portable systems.
FAQ
What is the maximum continuous output current of the MAX682ESA+?
The MAX682ESA+ delivers up to 250mA continuous output current under typical conditions (VIN = 3V, TA = +25°C). Absolute maximum rating is 300mA, but sustained operation near this limit requires careful thermal management due to SO-8 package power dissipation limits (471mW at +70°C). For reliable 250mA operation, ensure adequate PCB copper area and ambient temperature ≤+70°C.
Does the MAX682ESA+ require an inductor in its application circuit?
No, the MAX682ESA+ does not require an inductor. It uses a capacitor-based charge-pump topology with external CX, CIN, and COUT capacitors only. This eliminates magnetic components, reduces EMI, and simplifies layout - a core design advantage confirmed in the device's General Description and Typical Operating Circuit (Figure 5).
How is the switching frequency set on the MAX682ESA+?
The switching frequency of the MAX682ESA+ is set by sourcing current into the SHDN pin through an external resistor (REXT) connected to VIN. The relationship is REXT (kΩ) = 45000 × (VIN − 0.69V) / fOSC (kHz), enabling adjustment from 50kHz to 2MHz. This dual-function pin also controls shutdown: pulling SHDN low disables the device entirely.
What is the purpose of the SKIP pin on the MAX682ESA+?
The SKIP pin on the MAX682ESA+ selects the regulation mode: logic-low enables skip mode (pulse-skipping, low-quiescent-current operation), while logic-high forces constant-frequency mode (fixed switching, lower output ripple). Skip mode is mandatory for input voltages ≤3.6V; constant-frequency mode is required for VIN > 3.6V to maintain regulation.
Can the MAX682ESA+ operate from a 5V input supply?
Yes, the MAX682ESA+ supports input voltages up to 5.5V, but only in constant-frequency mode (SKIP = high). When VIN exceeds 3.6V, skip mode is disabled per datasheet specification to ensure stable 5V regulation. At 5V input, the device achieves ~80% efficiency at 250mA load (per Typical Operating Characteristics, Figure TOC13), with output ripple governed by COUT and fOSC.
MAX682ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 250mA
- Frequency - Switching:
- 50kHz ~ 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX682ESA+ FAQ
1.How can I place an order for MAX682ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX682ESA+ 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 MAX682ESA+ reliable?
The price and inventory of MAX682ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX682ESA+ is usually 5 days.
3.What payment methods are accepted for MAX682ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX682ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX682ESA+?
MAX682ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX682ESA+ 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 MAX682ESA+?
For technical support, including MAX682ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX682ESA+ requirements.
6.How does Aetrix verify that MAX682ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX682ESA+ 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 MAX682ESA+ meets industry standards.
7.What is the process for return or replacement of MAX682ESA+?
All MAX682ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX682ESA+, 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 MAX682ESA+ part is unused and in its original packaging.
Return procedure for MAX682ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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