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Analog Devices Inc./Maxim Integrated MAX1697SEUT#TG16
- Part No.:
- MAX1697SEUT#TG16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1697SEUT#TG16.pdf
- Description:
- IC REG CHARGE PUMP INV 60MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:3,146
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Product details
Overview
MAX1697SEUT#TG16 from Maxim Integrated is a monolithic CMOS inverting charge-pump DC-DC converter in a 6-pin SOT23 package, delivering up to 60mA output current with 12Ω typical output resistance. It accepts 1.25V–5.5V input and generates –1×VIN output voltage, optimized for low-noise analog supply generation from +3.3V or +5V logic rails in portable instrumentation and LCD biasing.
For engineers reviewing the MAX1697SEUT#TG16 datasheet, MAX1697SEUT#TG16 pinout, MAX1697SEUT#TG16 application, or MAX1697SEUT#TG16 equivalent, key selection criteria include oscillator frequency (35kHz), shutdown quiescent current (≤2nA), output impedance vs. load, thermal shutdown behavior (+150°C trip), and compatibility with 1µF ceramic flying/output capacitors.
Technical Context
The MAX1697SEUT#TG16 implements a two-phase switched-capacitor inverter using four on-chip MOSFET switches and internal oscillator control. Its 35kHz switching frequency balances external capacitor size and efficiency-lower than the 125kHz/250kHz variants but higher than the 12kHz version-enabling compact 1µF ceramic capacitor use while maintaining <12Ω output resistance at 60mA load.
It features active shutdown with 3Ω pull-down to GND on OUT, slew-rate-limited switching to reduce EMI, and thermal shutdown with 15°C hysteresis. Input current is limited to 170mA during startup to protect weak sources like alkaline batteries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 60mA maximum continuous - supports analog front-ends and GaAsFET bias circuits without external boost stages. |
| Output Resistance | 12Ω typical - ensures ≤0.72V drop at full 60mA load, critical for stable negative rail regulation. |
| Oscillator Frequency | 35kHz - enables use of small 1µF ceramic capacitors while minimizing EMI compared to higher-frequency variants. |
| Input Voltage Range | +1.25V to +5.5V - compatible with single-cell Li-ion, NiMH, and standard logic supplies. |
| Shutdown Supply Current | ≤2nA - preserves battery life in always-on portable systems requiring ultra-low standby power. |
| Thermal Shutdown | +150°C trip with 15°C hysteresis - prevents latch-up under sustained overload or poor PCB thermal design. |
| Efficiency | Up to 99% at light loads - dominated by 150µA quiescent current; drops as output resistance dominates at higher currents. |
Pinout & Package
Package: 6-pin SOT23 (U6F-6), 1.6mm × 2.9mm footprint, RoHS-compliant, lead-free top mark "AABW".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1+) | Flying capacitor positive terminal | Connects to high-side plate of C1; sees full switching waveform; requires low-ESR ceramic capacitor. |
| 2 (OUT) | Inverted output node | Delivers –VIN to load; actively pulled to GND via 3Ω switch during shutdown. |
| 3 (IN) | Positive input supply | Accepts 1.25V–5.5V; must be bypassed with ≥1µF capacitor near pin to suppress switching noise. |
| 4 (C1–) | Flying capacitor negative terminal | Switches between IN and GND; forms charge-transfer path with C1; low-inductance layout essential. |
| 5 (GND) | Analog/digital ground reference | Single ground plane required; star-point connection recommended to minimize noise coupling into sensitive analog circuits. |
| 6 (SHDN) | Logic-controlled enable | Active-high TTL/CMOS-compatible; drives >2.0V for ON, <0.6V for shutdown; draws ≤10nA bias current. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output resistance | 12Ω typical enables 60mA delivery with <0.72V dropout - eliminates need for discrete pass devices in space-constrained designs. |
| Slew-rate limited switching | Reduces high-frequency EMI emissions by controlling edge rates - simplifies EMC compliance for handheld medical and test equipment. |
| Startup current limiting | 170mA max limits inrush into weak sources (e.g., coin cells) - prevents brownout during wake-up from deep sleep modes. |
| Active output pull-down | 3Ω internal switch pulls OUT to GND in shutdown - ensures defined logic state and prevents floating negative rail in multi-rail systems. |
| Thermal protection with hysteresis | +150°C trip / +135°C recovery prevents oscillation during thermal stress - protects against solder reflow damage or sustained overcurrent faults. |
Applications
| Small LCD Panels | GaAsFET Bias Supplies |
|---|---|
Use Scenario: Generating –3.3V or –5V bias for segment drivers in monochrome or color STN/TFT LCD modules in PDAs and industrial HMIs. IC Role / Device Role / Timing Role: Inverting charge pump providing stable negative rail independent of main system supply fluctuations. Use Value: Enables single-supply operation with only two 1µF ceramic capacitors - reduces BOM count and board area versus inductor-based solutions. | Use Scenario: Supplying precise –2V to –5V gate bias for GaAs FETs in RF front-ends of GPS receivers and wireless sensors. IC Role / Device Role / Timing Role: Low-noise negative voltage generator with minimal ripple (<10mV p-p at 5mA) due to 35kHz switching and ceramic caps. Use Value: Maintains FET transconductance stability across temperature; 12Ω output resistance ensures <50mV shift at 4mA bias current. |
| Battery-Operated Equipment | Handheld Terminals |
Use Scenario: Creating isolated negative supply for op-amp signal conditioning in portable multimeters and data loggers powered by 2×AA alkaline cells. IC Role / Device Role / Timing Role: Micropower inverter with 2nA shutdown current - extends battery life beyond 1 year in sleep mode. Use Value: Startup current limiting (170mA) prevents cell voltage sag during wake-up, ensuring reliable boot from 1.25V minimum input. | Use Scenario: Powering RS-232 level shifters and EEPROM programming voltages in ruggedized handheld terminals used in warehousing and field service. IC Role / Device Role / Timing Role: Compact SOT23 charge pump replacing discrete transistor-based inverters in legacy designs. Use Value: 6-pin SOT23 footprint allows direct drop-in replacement without PCB redesign; RoHS-compliant #T suffix meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1697TEUT#TG16 | 125kHz oscillator frequency; 17Ω typical output resistance; requires smaller 0.47µF capacitors. | Better suited for ultra-compact layouts where EMI is less critical and lower output impedance is not required. | Select when minimizing capacitor footprint outweighs need for lowest output resistance. |
| MAX1720EUT#TG16 | Pin-compatible SOT23; 25mA output; 25Ω output resistance; same 35kHz frequency and shutdown behavior. | Targeted at lower-current analog sensors and interface ICs where 60mA capability is unnecessary. | Choose for cost-sensitive, low-power applications with <20mA load - reduces solution cost without changing layout. |
Compared with MAX1697SEUT#TG16, the MAX1697TEUT#TG16 trades output resistance for smaller external components, while the MAX1720EUT#TG16 reduces output capability to lower cost and quiescent current - both require no PCB changes but serve distinct current and size trade-offs.
Availability
MAX1697SEUT#TG16 is available at Aetrix Electronics and suitable for battery-powered instrumentation, portable LCD biasing, and GaAsFET RF modules requiring stable component supply with guaranteed long-term availability.
Supply support for MAX1697SEUT#TG16 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, automotive, and communications applications.
The MAX1697 series was designed specifically for compact, efficient negative voltage generation in space-constrained portable electronics - emphasizing micropower shutdown, low EMI, and minimal external component count.
FAQ
What is the exact oscillator frequency of the MAX1697SEUT#TG16?
The MAX1697SEUT#TG16 has a fixed 35kHz oscillator frequency, as indicated by the "S" suffix in its part number per Maxim's ordering table. This frequency enables optimal balance between capacitor size (1µF ceramic) and output impedance (12Ω typical), distinguishing it from the 12kHz (R), 125kHz (T), and 250kHz (U) variants.
Does the MAX1697SEUT#TG16 require external diodes or inductors?
No, the MAX1697SEUT#TG16 is a fully integrated inverting charge pump requiring only two external 1µF ceramic capacitors (C1 and C2) and an optional input bypass capacitor. It contains all necessary MOSFET switches, oscillator, and control circuitry on-die - eliminating inductors, diodes, and complex compensation networks.
How does the MAX1697SEUT#TG16 behave during shutdown?
When SHDN is driven low, the MAX1697SEUT#TG16 halts switching, reduces supply current to ≤2nA, and actively pulls the OUT pin to GND through a 3Ω internal switch. This ensures a defined 0V state on the negative rail, preventing floating outputs that could disrupt downstream analog circuitry or cause latch-up.
Can the MAX1697SEUT#TG16 operate from a 1.5V alkaline battery?
Yes, the MAX1697SEUT#TG16 supports input voltages as low as +1.25V, making it compatible with single-cell alkaline (1.5V nominal) and NiMH (1.2V nominal) batteries. Its 170mA startup current limit prevents excessive voltage sag during initial turn-on, ensuring reliable operation down to 1.25V under load.
What is the thermal shutdown threshold for the MAX1697SEUT#TG16?
The MAX1697SEUT#TG16 activates thermal shutdown at +150°C junction temperature and resumes operation once the die cools to +135°C (15°C hysteresis). This protects against permanent damage during sustained overload, poor heatsinking, or reflow soldering profile excursions - consistent across all MAX1697 variants.
MAX1697SEUT#TG16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Ratiometric
- Output Configuration:
- Positive or Negative
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 1.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 60mA
- Frequency - Switching:
- 16kHz ~ 60kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX1697SEUT#TG16 FAQ
1.How can I place an order for MAX1697SEUT#TG16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1697SEUT#TG16 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 MAX1697SEUT#TG16 reliable?
The price and inventory of MAX1697SEUT#TG16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1697SEUT#TG16 is usually 5 days.
3.What payment methods are accepted for MAX1697SEUT#TG16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1697SEUT#TG16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1697SEUT#TG16?
MAX1697SEUT#TG16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1697SEUT#TG16 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 MAX1697SEUT#TG16?
For technical support, including MAX1697SEUT#TG16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1697SEUT#TG16 requirements.
6.How does Aetrix verify that MAX1697SEUT#TG16 is sourced from the original manufacturer or authorized distributors?
All MAX1697SEUT#TG16 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 MAX1697SEUT#TG16 meets industry standards.
7.What is the process for return or replacement of MAX1697SEUT#TG16?
All MAX1697SEUT#TG16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1697SEUT#TG16, 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 MAX1697SEUT#TG16 part is unused and in its original packaging.
Return procedure for MAX1697SEUT#TG16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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