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Analog Devices Inc./Maxim Integrated MAX683EUA+T
- Part No.:
- MAX683EUA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MAX683EUA+T.pdf
- Description:
- IC REG CHARG PUMP 5V 100MA 8UMAX
- Quantity:
- Payment:
- Shipping:
Inventory:3,850
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Product details
Overview
The MAX683EUA+T from Maxim Integrated is a 5V fixed-output charge-pump voltage regulator IC designed for compact, low-noise auxiliary power in battery-powered systems. It delivers up to 100mA 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 three external capacitors and one resistor-no inductor needed. It serves as a space-constrained 3.3V-to-5V local converter in PCMCIA cards and flash memory supplies.
For engineers reviewing the MAX683EUA+T datasheet, MAX683EUA+T pinout, MAX683EUA+T application, or MAX683EUA+T equivalent, key selection criteria include its 100mA output capability, µMAX-8 package height of 1.1mm, shutdown current of 0.1µA, adjustable switching frequency, and compatibility with ceramic or tantalum output capacitors down to 0.47µF.
Technical Context
The MAX683EUA+T implements a regulated charge-pump doubler architecture using internal MOSFET switches, a 1.23V bandgap reference, and error amplifier feedback. Its dual-mode operation-skip mode (low IQ, variable frequency) and constant-frequency mode (low ripple, fixed fOSC)-is selected via the SKIP pin, with mandatory constant-frequency operation above 3.6V input.
Frequency is set by SHDN pin bias current (1–50µA), calculated via REXT = 45k·(VIN − 0.69V)/fOSC, enabling precise noise/efficiency tradeoffs. Undervoltage lockout activates below 2.25V (100mV hysteresis), and power dissipation follows PDISS = IOUT·(2·VIN − VOUT), constrained by the 8-pin µMAX package's 330mW limit at +70°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±4% - ensures stable logic-level supply for 5V peripherals without external feedback. |
| Max Output Current | 100mA - supports moderate-power loads like flash memory write cycles or SIM card interfaces. |
| Input Voltage Range | 2.7V–5.5V (SKIP = high); 2.7V–3.6V (SKIP = low) - enables direct use with Li-ion, 3.3V rails, or USB-powered systems. |
| Switching Frequency | 50kHz–2MHz (externally adjustable) - allows optimization: high fOSC reduces capacitor size; low fOSC improves light-load efficiency. |
| Quiescent Current | 100µA in pulse-skipping mode - extends battery life in standby or intermittent-use applications. |
| Shutdown Current | 0.1µA - minimizes drain during system sleep, critical for long-life portable devices. |
| Package | 8-pin µMAX (3mm × 3mm × 1.1mm) - ultra-low-profile footprint ideal for thin PCMCIA cards and miniature equipment. |
Pinout & Package
The MAX683EUA+T is housed in an 8-pin µMAX package (3mm × 3mm, 1.1mm height), optimized for minimal PCB area and low profile in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SKIP | Mode select input | Logic-low enables skip mode (low IQ); logic-high forces constant-frequency mode (low ripple) and is required for VIN > 3.6V. |
| 2 - SHDN | Shutdown & frequency control | Sinking ≥1µA disables shutdown and sets oscillator frequency; <1µA places device in 0.1µA shutdown state. |
| 3 - IN | Main power input | Accepts 2.7V–5.5V (SKIP = high) or 2.7V–3.6V (SKIP = low); bypassed to PGND with ≥0.47µF capacitor. |
| 4 - GND | Analog ground reference | Low-impedance return path for error amplifier and reference; must be short-traced to PGND. |
| 5 - PGND | Power ground | High-current return for charge-pump switches; separate from GND to minimize noise coupling. |
| 6 - CXN | Negative transfer capacitor terminal | Connects to negative side of 0.22–0.47µF charge-pump capacitor (CX); critical for charge transfer timing. |
| 7 - CXP | Positive transfer capacitor terminal | 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 100mA; requires ≥0.47µF ceramic or 2.2µF tantalum output capacitor to meet ripple specs. |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates EMI-prone magnetics and simplifies layout-only three capacitors and one resistor required for full 5V regulation. |
| Ultra-small capacitor support | Enables 0.47µF CX and 0.47µF COUT in constant-frequency mode, reducing board area by >50% vs. traditional boost converters. |
| Dual operating modes | Skip mode cuts no-load IQ to 100µA; constant-frequency mode maintains <80mV ripple at 1MHz, supporting noise-sensitive analog circuits. |
| Integrated UVLO with hysteresis | Shuts down cleanly below 2.25V input and stays off until VIN rises to 2.35V, preventing brownout oscillation in fading battery conditions. |
| Low-profile µMAX package | 1.1mm height enables use in sub-2mm-thick modules such as GSM SIMM cards and ultraportable medical sensors. |
Applications
| Flash Memory Supplies | Battery-Powered Applications |
|---|---|
Use Scenario: Providing regulated 5V during NAND/NOR flash programming pulses in handheld data loggers. IC Role / Device Role / Timing Role: Charge-pump regulator delivering 100mA peak current with fast line/load transient response (<2ms settling). Use Value: Eliminates need for bulky inductors while maintaining tight 5V ±4% regulation across 2.7–3.6V battery discharge range. | Use Scenario: Powering 5V microcontroller peripherals in coin-cell–operated remote sensors. IC Role / Device Role / Timing Role: Auxiliary supply enabling 3.3V MCU to drive 5V I²C EEPROM or ADC without level shifters. Use Value: 0.1µA shutdown current extends 10-year battery life; skip mode maintains 100µA IQ during sensor sleep cycles. |
| PCMCIA Cards | GSM SIMM Cards |
Use Scenario: Generating 5V from 3.3V host bus for legacy PCMCIA Type II peripheral cards. IC Role / Device Role / Timing Role: Compact 3.3V-to-5V local converter occupying <9mm² PCB area in tight card-edge layouts. Use Value: µMAX-8 package (3×3×1.1mm) fits within 1.6mm card thickness envelope; supports hot-plug sequencing. | Use Scenario: Boosting 3V SIM card interface voltage to 5V for legacy GSM handsets. IC Role / Device Role / Timing Role: Low-profile charge-pump supplying 50–100mA to SIM card VCC pin during authentication. Use Value: 1.1mm height meets SIMM mechanical spec; constant-frequency mode ensures <80mV ripple avoids SIM communication errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar charge-pump regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX684EUA+T | 50mA max output, same µMAX-8 package, identical pinout and control interface. | Better suited for ultra-low-power SIM cards or RTC backup where <50mA suffices. | Select when load current ≤50mA and smallest possible quiescent current is prioritized over output drive. |
| TPS60403DBVR | TI part: 60mA output, fixed 5V, 1.2MHz fOSC, 1.5µA IQ (vs. 100µA), SOT-23-6 package. | Lacks SKIP mode and SHDN-based frequency tuning; simpler but less flexible control. | Choose for cost-sensitive, low-complexity designs needing basic 5V boost without programmable frequency or dual-mode operation. |
Compared with MAX683EUA+T, MAX684EUA+T offers lower output current but identical footprint and control scheme-ideal for derating or lower-power variants-while TPS60403DBVR trades flexibility for smaller size and lower IQ, requiring redesign for pinout and feature compatibility.
Availability
MAX683EUA+T is available at Aetrix Electronics and suitable for flash memory supplies, battery-powered instrumentation, and miniature PCMCIA peripherals requiring stable component supply with guaranteed long-term availability.
Supply support for MAX683EUA+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 semiconductor company specializing in high-performance analog, mixed-signal, and power-management ICs for industrial, communications, and consumer applications.
The MAX682/MAX683/MAX684 product line was engineered specifically for compact, inductorless 3.3V-to-5V local conversion in space- and power-constrained portable electronics-emphasizing minimal external components and dual-mode efficiency/noise optimization.
FAQ
What is the maximum output current specification for the MAX683EUA+T?
The MAX683EUA+T is rated for a maximum continuous output current of 100mA under specified thermal conditions. Absolute maximum ratings allow brief 150mA peaks, but sustained operation above 100mA risks exceeding the µMAX package's 330mW power dissipation limit at ambient temperatures above +70°C. Designers should verify thermal performance using PDISS = IOUT·(2·VIN − 5V) and derate accordingly.
Can the MAX683EUA+T operate from a 5V input supply?
Yes, the MAX683EUA+T supports input voltages up to 5.5V-but only when SKIP is held high (constant-frequency mode). Operation with SKIP = low is restricted to VIN ≤ 3.6V per datasheet specifications. At 5V input, the device delivers regulated 5V output with typical efficiency of ~75% at 50mA load in constant-frequency mode, and requires appropriate external capacitor sizing per Table 3.
How is switching frequency programmed on the MAX683EUA+T?
Switching frequency on the MAX683EUA+T is set by the current sourced into the SHDN pin: REXT = 45k·(VIN − 0.69V)/fOSC (REXT in kΩ, fOSC in kHz). For example, with VIN = 3.3V and desired fOSC = 1MHz, REXT ≈ 118kΩ. SHDN bias current must stay within 1–50µA for guaranteed operation; values outside this range may cause erratic switching or shutdown.
What is the purpose of the separate PGND and GND pins on the MAX683EUA+T?
The MAX683EUA+T separates PGND (power ground) and GND (analog ground) to isolate high-current charge-pump switch return paths from sensitive analog circuitry (error amplifier, reference). PGND carries pulsed currents up to 200mA during CX charging/discharging; routing it directly to input/output capacitors with short, wide traces prevents ground bounce. GND provides quiet reference for feedback and shutdown logic-connecting them only at a single point near CIN avoids noise coupling into regulation.
Does the MAX683EUA+T require external feedback resistors to set output voltage?
No, the MAX683EUA+T provides a fixed 5V output with internal feedback-no external resistors are needed. The device integrates a precision 1.23V bandgap reference and internal resistive divider to achieve ±4% output regulation across temperature and load. This simplifies design, eliminates resistor tolerance errors, and reduces bill-of-materials count compared to adjustable regulators.
MAX683EUA+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 100mA
- Frequency - Switching:
- 50kHz ~ 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-uMAX/uSOP
MAX683EUA+T FAQ
1.How can I place an order for MAX683EUA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX683EUA+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 MAX683EUA+T reliable?
The price and inventory of MAX683EUA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX683EUA+T is usually 5 days.
3.What payment methods are accepted for MAX683EUA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX683EUA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX683EUA+T?
MAX683EUA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX683EUA+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 MAX683EUA+T?
For technical support, including MAX683EUA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX683EUA+T requirements.
6.How does Aetrix verify that MAX683EUA+T is sourced from the original manufacturer or authorized distributors?
All MAX683EUA+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 MAX683EUA+T meets industry standards.
7.What is the process for return or replacement of MAX683EUA+T?
All MAX683EUA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX683EUA+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 MAX683EUA+T part is unused and in its original packaging.
Return procedure for MAX683EUA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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