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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:804
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Product details
Overview
MAX682ESA from Maxim Integrated is a 5V fixed-output charge-pump voltage regulator IC designed for compact auxiliary power supplies. It delivers up to 250mA output current from a 2.7V–5.5V input, operates in skip or constant-frequency mode (50kHz–2MHz), achieves ±4% output regulation, 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, 0.1µA shutdown current, adjustable switching frequency via SHDN bias current, and dual-mode operation (skip vs. constant-frequency) for optimizing efficiency or ripple in flash memory and PCMCIA power rails.
Technical Context
The MAX682ESA integrates an error amplifier, 1.23V bandgap reference, internal feedback network, oscillator, high-current MOSFET switches, and dual-function SHDN logic. Its regulation architecture supports two distinct modes: skip mode (SKIP = low) disables switching when output exceeds 5V, minimizing quiescent current (100µA typical); constant-frequency mode (SKIP = high) enables continuous switching with externally set frequency (50kHz–2MHz) for lower output ripple.
Input undervoltage lockout activates below 2.25V with 100mV hysteresis, and the device mandates SKIP = high for VIN > 3.6V. Power dissipation follows PDISS = IOUT(2VIN − VOUT), with SO-8 package derating at 5.9mW/°C above +70°C and maximum continuous dissipation of 471mW at TA = +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.05V (±4% tolerance), enabling direct replacement of LDOs in 5V logic rails without external feedback. |
| Max Output Current | 250mA continuous (300mA peak), sufficient to power multiple flash memory devices or SIMM cards simultaneously. |
| Input Voltage Range | 2.7V to 5.5V (SKIP = high); 2.7V to 3.6V (SKIP = low), supporting single-cell Li-ion, dual-cell alkaline, and 3.3V system rails. |
| Switching Frequency | 50kHz to 2MHz (externally adjustable via SHDN bias current), allowing optimization of capacitor size versus EMI filtering requirements. |
| Quiescent Current | 100µA in skip mode, reducing standby power in portable systems with intermittent 5V load demand. |
| Shutdown Current | 0.1µA typical, ensuring negligible battery drain during system sleep states. |
| Load Regulation | ±3% over 0–250mA load range, maintaining stable 5V supply across varying flash write/read currents. |
Pinout & Package
MAX682ESA is housed in an 8-pin SO (Small Outline) package, 1.75mm body width, 1.5mm height, with standard JEDEC MS-012AC footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SKIP | Mode select input | Logic-level control: low enables skip mode (low IQ); high forces constant-frequency mode (low ripple) and is mandatory for VIN > 3.6V. |
| 2 - SHDN | Dual-function bias/shutdown pin | Sinking ≥1µA activates device and sets oscillator frequency; <0.8V shuts down entire IC, drawing only 0.1µA. |
| 3 - IN | Main power input | Accepts 2.7V–5.5V (SKIP = high) or 2.7V–3.6V (SKIP = low); requires local 1–2.2µF ceramic bypass to PGND. |
| 4 - GND | Analog ground reference | Low-impedance return for error amplifier and reference; must be short-traced to PGND to minimize noise coupling. |
| 5 - PGND | Power ground terminal | High-current return path for charge-pump switches; connects directly to CIN and COUT negative terminals. |
| 6 - CXN | Negative terminal of charge-pump capacitor | Connects to negative side of 0.22–1µF transfer capacitor (CX); carries high di/dt switching current. |
| 7 - CXP | Positive terminal of charge-pump capacitor | Connects to positive side of CX; forms flying capacitor node that doubles and regulates input to 5V. |
| 8 - OUT | Regulated 5V output | Delivers up to 250mA; requires 2.2–4.7µF low-ESR ceramic or tantalum output capacitor to PGND for stability. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates magnetic components and EMI concerns-reduces BOM count and PCB area by replacing buck converters in low-noise 5V rails. |
| 1µF capacitor per 100mA output | Enables ultra-compact layouts: e.g., 2.2µF CIN + 0.47µF CX + 2.2µF COUT suffices for full 250mA operation in constant-frequency mode. |
| Dual operating modes | Skip mode cuts light-load IQ to 100µA; constant-frequency mode reduces output ripple to <80mV (1MHz, 250mA) using COUT-based filtering. |
| 0.1µA shutdown current | Extends battery life in always-on backup systems-e.g., GSM SIM card modules retain RTC and secure memory with near-zero leakage. |
| Input UVLO with hysteresis | Shuts down cleanly at VIN < 2.25V and re-enables only at VIN > 2.35V, preventing brownout oscillation during battery discharge. |
Applications
| Flash Memory Supplies | Battery-Powered Applications |
|---|---|
Use Scenario: Providing regulated 5V to NAND/NOR flash during program/erase cycles in handheld data loggers. IC Role / Device Role / Timing Role: Charge-pump regulator delivering 250mA peak current with fast line/load transient response (<2ms recovery). Use Value: Eliminates need for bulky inductor-based DC/DC; maintains 5V within ±4% across 2.7–3.6V battery range while consuming <100µA in idle. |
Use Scenario: Powering 5V peripherals (USB-UART bridges, SD card interfaces) from single 3.7V Li-ion cell in portable medical sensors. IC Role / Device Role / Timing Role: Compact auxiliary supply converting 3.3V system rail to 5V, controlled via microcontroller GPIO on SKIP and SHDN pins. Use Value: Achieves >85% efficiency at 100mA (3.3V input), extends runtime by minimizing no-load IQ, and fits within 15mm² PCB area including all passives. |
| PCMCIA Cards | 3.3V to 5V Local Conversion |
Use Scenario: Generating 5V for legacy PCMCIA Type II card slots in industrial laptops with 3.3V main power. IC Role / Device Role / Timing Role: Hot-swap capable 5V source with controlled startup and UVLO protection against undersupply during card insertion. Use Value: Meets PCMCIA 5V rail timing specs (tSTART < 250µs), withstands 5s short-circuit events, and operates reliably across -40°C to +85°C ambient. |
Use Scenario: Local 5V generation for FPGA I/O banks or analog front-end circuitry in 3.3V-based embedded controllers. IC Role / Device Role / Timing Role: Point-of-load regulator placed adjacent to load; uses constant-frequency mode to suppress switching noise coupling into sensitive analog sections. Use Value: Delivers clean 5V with <80mVpp ripple (1MHz, 250mA), avoids EMI from inductor-based solutions, and supports seamless integration with existing 3.3V power domain. |
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 100mA max output, µMAX-8 package (1.1mm height), identical pinout except smaller thermal pad. | Targeted at space-constrained designs where 250mA is excessive-e.g., single-SIM GSM modules or low-power PCMCIA peripherals. | Select MAX683EUA when board height < 1.2mm is critical and load current ≤100mA; not drop-in due to lower current rating and different package thermal profile. |
| TPS60403DBVR | Texas Instruments' 5V charge pump with 60mA output, fixed 500kHz frequency, 1.5µA quiescent current in shutdown, SOT-23-6 package. | Optimized for ultra-low IQ in always-on sensor nodes-not suitable for 250mA loads or adjustable frequency requirements. | Choose TPS60403DBVR only for sub-60mA applications prioritizing minimal shutdown current and smallest footprint; incompatible pinout and current capability preclude direct substitution. |
Compared with MAX683EUA and TPS60403DBVR, the MAX682ESA uniquely balances high output current (250mA), SO-8 manufacturability, and dual-mode flexibility-making it the only option among the three capable of powering multi-die flash arrays or parallelized PCMCIA peripherals without derating or thermal compromise.
Availability
MAX682ESA is available at Aetrix Electronics and suitable for flash memory supplies, battery-powered portable instrumentation, and PCMCIA card interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
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, automotive, and communications 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 electronics-emphasizing low quiescent current, adjustable frequency, and robust thermal performance in SO packaging.
FAQ
What is the maximum continuous output current of the MAX682ESA?
The MAX682ESA delivers up to 250mA continuous output current under specified conditions (TA ≤ +85°C, proper thermal layout). Absolute maximum rating is 300mA for short durations, but sustained operation above 250mA risks exceeding SO-8 package power limits-especially at high input voltages. Derating is required above +70°C ambient per the 5.9mW/°C specification.
How does the SHDN pin control both enable/disable and switching frequency on the MAX682ESA?
The SHDN pin on the MAX682ESA functions as a dual-purpose terminal: sinking <0.8V disables the IC (0.1µA shutdown current), while sourcing 1–50µA through an external resistor to VIN sets the oscillator frequency via REXT = 45000(VIN − 0.69V)/fOSC. This eliminates need for separate frequency-setting and enable pins, simplifying control interface in microcontroller-driven systems.
Can the MAX682ESA operate with input voltages above 3.6V?
Yes-but only in constant-frequency mode (SKIP = high). The MAX682ESA's internal regulation scheme requires SKIP = high for VIN > 3.6V to maintain stable 5V output; skip mode is restricted to VIN ≤ 3.6V. Attempting skip mode above this threshold causes loss of regulation and potential output overvoltage.
What capacitor values are recommended for the MAX682ESA in skip mode versus constant-frequency mode?
In skip mode (low IQ), use CIN = 2.2µF, CX = 1µF, COUT = 4.7µF (tantalum) per Table 2. In constant-frequency mode (low ripple), Table 3 recommends CIN = 1µF, CX = 0.47µF, COUT = 2.2µF (ceramic). All capacitors must have ESR < 100mΩ; ceramic types preferred for COUT in constant-frequency mode to minimize ripple.
Is the MAX682ESA pin-compatible with other devices in the MAX68x family?
The MAX682ESA shares identical pinout and function mapping with MAX683EUA and MAX684EUA, but differs in maximum output current (250mA vs. 100mA/50mA) and package (SO-8 vs. µMAX-8). While electrical pin compatibility exists, substituting MAX682ESA for MAX683EUA in a µMAX-layout requires PCB redesign due to SO-8 footprint mismatch and higher thermal mass.
MAX682ESA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- 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.
MAX682ESA Tags
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