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Analog Devices Inc./Maxim Integrated MAX1683EUK+T
- Part No.:
- MAX1683EUK+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX1683EUK+T.pdf
- Description:
- IC REG CHARGE PUMP 2VIN SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:16,986
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Product details
Overview
MAX1683EUK+T from Maxim Integrated is a monolithic CMOS switched-capacitor voltage doubler IC designed for low-power, space-constrained applications. It accepts 2.0V–5.5V input, delivers up to 45mA output with ≤600mV drop at 30mA, operates at 35kHz, and achieves 97–99.9% conversion efficiency - ideal for powering LCD bias in handheld PDAs.
For engineers reviewing the MAX1683EUK+T datasheet, MAX1683EUK+T pinout, MAX1683EUK+T application, or MAX1683EUK+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, SOT23-5 package compatibility, 35kHz oscillator frequency, output resistance ≤65Ω, and dual-capacitor simplicity for board-level voltage doubling.
Technical Context
The MAX1683EUK+T implements a two-phase charge-pump topology with integrated power MOSFET switches and oscillator control circuitry. Its 35kHz fixed-frequency operation enables predictable ripple and compact external capacitor sizing (C1 = 3.3µF, C2 = 10µF typical), while internal switch resistance and capacitor ESR jointly determine output impedance.
Unlike linear regulators or inductive boost converters, it requires no inductors and delivers doubled output voltage (VOUT ≈ 2 × VIN − IOUT × ROUT) with minimal quiescent current (145µA typ at +25°C). Output droop and ripple are directly governed by load current, capacitor values, and oscillator frequency - all specified across the full -40°C to +85°C industrial temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +2.0V to +5.5V - supports single-cell Li-ion, alkaline, or NiMH battery inputs without regulation. |
| Oscillator Frequency | 35kHz (typ) - enables use of small ceramic flying capacitors (e.g., 3.3µF) and predictable ripple spectrum. |
| Voltage Conversion Efficiency | 97% min / 99.9% typ at +25°C - minimizes power loss and thermal rise in battery-powered systems. |
| No-Load Supply Current | 145µA typ at +25°C - extends battery life in standby or intermittent-use applications. |
| Output Resistance | ≤65Ω (max at -40°C to +85°C) - determines output voltage droop: e.g., 30mA load causes ≤1.95V drop. |
| Output Current Capability | Up to 45mA (absolute max), 30mA typical with ≤600mV drop - sufficient for segment LCD bias or low-power analog rails. |
| Operating Temperature Range | -40°C to +85°C - qualified for industrial and portable consumer environments without derating. |
Pinout & Package
MAX1683EUK+T is housed in a RoHS-compliant, lead(Pb)-free 5-pin SOT23-5 package (outline no. 21-0057), with top mark "ACCM". The package supports standard reflow soldering (260°C) and has a thermal resistance θJA of ~210°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for all internal switches and output current; must connect to low-impedance system ground plane. |
| 2 OUT | Doubled output voltage node | Delivers ~2×VIN; connects directly to reservoir capacitor C2 (to GND) and load; sensitive to layout-induced noise. |
| 3 C1− | Flying capacitor negative terminal | Switches between GND and IN during charge/discharge phases; requires low-ESR ceramic capacitor (e.g., 3.3µF). |
| 4 IN | Input supply voltage | Accepts 2.0V–5.5V unregulated input; bypass with 0.1µF ceramic capacitor close to pin for switching noise suppression. |
| 5 C1+ | Flying capacitor positive terminal | Switches between IN and OUT during charge/discharge; forms charge-transfer path with C1− and internal MOSFETs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small footprint | 5-pin SOT23-5 package (2.9mm × 1.6mm) - fits tight PCB real estate in portable devices like PDAs and hand terminals. |
| Capacitor-only design | Requires only two external capacitors (C1, C2) - eliminates inductors, reduces BOM count, and avoids EMI from magnetic components. |
| High-efficiency charge pump | 97–99.9% conversion efficiency - preserves battery energy and limits self-heating in sealed enclosures. |
| Guaranteed wide-temp operation | Full electrical specs validated from -40°C to +85°C - ensures reliability in automotive accessory, industrial handheld, and outdoor consumer gear. |
| Low-noise switching profile | Fixed 35kHz oscillator enables predictable filtering and avoids audible noise bands - critical for LCD bias and sensor signal chains. |
Applications
| Small LCD Panels | Cell Phones |
|---|---|
|
Use Scenario: Generating 5–6V bias voltage for passive-matrix LCD segments in compact instrumentation displays. IC Role / Device Role / Timing Role: Voltage-doubling charge pump providing regulated-free, low-noise DC output from 2.7–3.3V battery rail. Use Value: Eliminates need for inductor-based boost converters, reducing solution size by >40% and enabling thinner display modules. |
Use Scenario: Powering backlight driver ICs or analog front-end rails in feature phone mainboards. IC Role / Device Role / Timing Role: Efficient voltage booster converting single-cell Li-ion (3.0–4.2V) to stable 6V supply for LED drivers. Use Value: Delivers 30mA at <600mV drop with 97% efficiency - extends talk time and avoids thermal throttling in confined layouts. |
| Handheld Terminals | PDAs |
|
Use Scenario: Supplying 5.5V logic rails for smart-card readers or barcode scanner interfaces in ruggedized field terminals. IC Role / Device Role / Timing Role: Industrial-grade voltage doubler operating continuously across -40°C to +85°C ambient. Use Value: Guaranteed performance over full temperature range ensures consistent reader voltage under cold storage or hot vehicle deployment. |
Use Scenario: Providing 6V VLCM for monochrome or grayscale LCD modules in legacy PDA designs. IC Role / Device Role / Timing Role: Low-quiescent-current (145µA) charge pump enabling long standby battery life between sync sessions. Use Value: Enables >100-hour standby on single AA cell due to ultra-low no-load current and high light-load efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-doubling applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1682EUK+T | 12kHz oscillator, 110µA no-load current, 20Ω typical output resistance at +25°C - lower frequency allows larger capacitors but higher ripple. | Better suited for ultra-low-noise, low-power applications where 12kHz switching is acceptable (e.g., medical sensors). | Select MAX1682EUK+T when minimizing quiescent current and EMI sensitivity outweighs need for compact capacitor sizing. |
| TPS60230RGTR | 3-MHz fixed-frequency, 90% min efficiency, 2.7–5.5V input, 40mA output - uses different charge-pump architecture with integrated regulators. | Includes output voltage regulation and soft-start; targets applications requiring tighter output tolerance (<±3%) than unregulated doublers provide. | Choose TPS60230RGTR when regulated 5.0V output is required, not just doubling - adds complexity but improves load transient response. |
Compared with MAX1682EUK+T and TPS60230RGTR, the MAX1683EUK+T offers the optimal balance of compact capacitor sizing (3.3µF C1), moderate quiescent current (145µA), and industrial temperature support - making it preferred for cost-sensitive, space-constrained LCD bias in portable industrial tools.
Availability
MAX1683EUK+T is available at Aetrix Electronics and suitable for handheld terminals, PDAs, and small LCD panel designs requiring stable component supply, guaranteed -40°C to +85°C operation, and RoHS-compliant packaging.
Supply support for MAX1683EUK+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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.
The MAX1682/MAX1683 product line was engineered specifically for ultra-compact, inductorless voltage doubling in battery-powered portable electronics - prioritizing minimal external components, low quiescent current, and robust operation across extended temperatures.
FAQ
What is the maximum continuous output current specification for MAX1683EUK+T?
The MAX1683EUK+T is rated for up to 45mA output current under absolute maximum conditions, with 30mA specified as the typical usable output delivering ≤600mV voltage drop. Sustained operation above 30mA increases output resistance effects and thermal stress - design margin should be applied based on ambient temperature and PCB copper area.
Does MAX1683EUK+T require external feedback or regulation circuitry?
No, the MAX1683EUK+T is an unregulated charge-pump voltage doubler - its output voltage is approximately 2 × VIN minus IOUT × ROUT, with no feedback loop or regulation. Output stability relies on input voltage consistency and proper capacitor selection; for regulated outputs, external LDOs or alternative ICs like TPS60230RGTR are required.
What are the recommended capacitor types and values for MAX1683EUK+T?
For optimal performance, use X7R ceramic capacitors: C1 = 3.3µF (flying capacitor) and C2 = 10µF (reservoir capacitor), both with low ESR (<100mΩ). AVX TPS and Matsuo X7R series are explicitly recommended in the datasheet. Smaller C1 values (e.g., 1µF) increase output resistance; larger values yield diminishing returns beyond 10µF.
Can MAX1683EUK+T operate below 2.0V input?
Per datasheet Note 2, the MAX1683EUK+T can continue operating down to ~1.0V once started, but startup is only guaranteed above 1.7V (min spec) and fully characterized from 2.0V. For reliable turn-on in low-battery scenarios, ensure VIN ≥ 2.0V at power-up; brown-out behavior below this threshold is not guaranteed.
Is MAX1683EUK+T pin-compatible with MAX1682EUK+T?
Yes, MAX1683EUK+T and MAX1682EUK+T share identical pinout, package (SOT23-5), and terminal functions - they are functionally interchangeable in hardware layout. However, their oscillator frequencies differ (35kHz vs. 12kHz), affecting capacitor sizing, ripple, and efficiency curves; firmware or system-level timing assumptions must be verified.
MAX1683EUK+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Ratiometric
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 45mA
- Frequency - Switching:
- 35kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MAX1683EUK+T FAQ
1.How can I place an order for MAX1683EUK+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1683EUK+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 MAX1683EUK+T reliable?
The price and inventory of MAX1683EUK+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1683EUK+T is usually 5 days.
3.What payment methods are accepted for MAX1683EUK+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1683EUK+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1683EUK+T?
MAX1683EUK+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1683EUK+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 MAX1683EUK+T?
For technical support, including MAX1683EUK+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1683EUK+T requirements.
6.How does Aetrix verify that MAX1683EUK+T is sourced from the original manufacturer or authorized distributors?
All MAX1683EUK+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 MAX1683EUK+T meets industry standards.
7.What is the process for return or replacement of MAX1683EUK+T?
All MAX1683EUK+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX1683EUK+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 MAX1683EUK+T part is unused and in its original packaging.
Return procedure for MAX1683EUK+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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