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Analog Devices Inc./Maxim Integrated MAX1697REUT#TG16
- Part No.:
- MAX1697REUT#TG16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1697REUT#TG16.pdf
- Description:
- IC REG CHARGE PUMP INV 60MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:4,474
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Product details
Overview
MAX1697REUT#TG16 from Maxim Integrated is a monolithic CMOS inverting charge-pump DC-DC converter delivering up to 60mA output current with 12Ω typical output resistance, operating at 12kHz oscillator frequency, and accepting 1.25V–5.5V input voltage. It features logic-controlled shutdown, thermal protection, and is used to generate negative bias for analog circuitry from +3.3V or +5V logic rails.
For engineers reviewing the MAX1697REUT#TG16 datasheet, MAX1697REUT#TG16 pinout, MAX1697REUT#TG16 application, or MAX1697REUT#TG16 equivalent, key selection criteria include output impedance vs. load, shutdown supply current (≤2nA), startup current limiting (170mA typ), efficiency across input voltage range, and compatibility with low-ESR ceramic capacitors.
Technical Context
The MAX1697REUT#TG16 implements a two-phase switched-capacitor inverter topology with integrated power MOSFETs (S1–S4) and oscillator control. Its 12kHz switching frequency minimizes EMI while enabling use of larger, lower-cost external capacitors.
It operates as a fixed-ratio inverter (VOUT ≈ –VIN) with active ground pull-down during shutdown (3Ω resistance), thermal shutdown at +150°C with 15°C hysteresis, and start-up current limiting to protect weak input sources like alkaline batteries.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 60mA max - supports moderate analog bias loads without external boost stages |
| Output Resistance | 12Ω typ - determines voltage droop under load; critical for stable negative rail regulation |
| Oscillator Frequency | 12kHz - enables use of 22µF ceramic flying capacitor; reduces EMI vs. 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 max - preserves battery life in always-on portable systems |
| Quiescent Supply Current | 150µA typ - defines no-load power loss in active mode |
| Voltage Conversion Efficiency | 99% max - high efficiency maintained up to ~20mA load; drops with increasing IOUT due to ROUT losses |
Pinout & Package
MAX1697REUT#TG16 is housed in a RoHS-compliant, lead-free 6-pin SOT23 package (package code U6F-6), with pin 1 marked by a '+' indicator per Maxim's lead-free identification standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+ | Flying capacitor positive terminal | Connects to one plate of external flying capacitor (C1); switches between IN and OUT nodes |
| OUT | Inverted output node | Delivers regulated negative voltage (≈ –VIN); actively pulled to GND during shutdown |
| IN | Positive input supply | Accepts 1.25V–5.5V input; powers internal oscillator and switches |
| C1− | Flying capacitor negative terminal | Connects to second plate of C1; referenced to GND during charge phase |
| GND | Analog/digital ground reference | Common return path for input, output, and internal circuitry; requires low-impedance PCB plane |
| SHDN | Logic-controlled enable/disable | High = normal operation; low = shutdown (2nA IQ, 3Ω OUT-to-GND pull-down) |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output resistance | 12Ω typ - maintains <5% voltage droop at 60mA load on –3.3V rail |
| EMI-reduced slew-rate control | Integrated edge shaping - lowers radiated emissions without external filtering |
| Startup current limiting | 170mA max - prevents brownout when powering from high-impedance sources (e.g., coin cells) |
| Thermal shutdown protection | +150°C trip with 15°C hysteresis - prevents latch-up or damage during sustained overload |
| Micropower shutdown mode | 2nA supply current - enables multi-year battery life in maintenance-free IoT sensors |
Applications
| Small LCD Panels | GaAsFET Bias Supplies |
|---|---|
Use Scenario: Generating –5V bias for segment drivers in handheld LCD modules powered from +3.3V MCU rails. IC Role / Device Role / Timing Role: Inverting charge pump providing stable negative VEE for LCD contrast control. Use Value: Eliminates need for discrete inductor-based converters; 12kHz switching avoids audible noise in portable displays. | Use Scenario: Supplying –2.5V gate bias to GaAs FETs in RF front-end modules of satellite communication terminals. IC Role / Device Role / Timing Role: Low-noise negative voltage generator with fast wake-up (<70µs) for burst-mode RF transmission. Use Value: 12Ω output resistance ensures minimal bias shift under pulsed RF load; thermal shutdown protects against antenna mismatch faults. |
| Battery-Operated Equipment | Negative Supply from +3.3V Logic |
Use Scenario: Powering op-amp signal conditioning circuits in portable medical sensors running from single 3.6V Li-ion cell. IC Role / Device Role / Timing Role: Efficient inverter creating –3.3V rail for dual-supply analog signal chain. Use Value: 150µA quiescent current extends battery runtime; 2nA shutdown current enables deep-sleep modes. | Use Scenario: Deriving –3.3V from main +3.3V logic supply in industrial PLC I/O modules requiring bipolar analog inputs. IC Role / Device Role / Timing Role: Compact, SOT23-mounted voltage inverter supporting isolated analog front-end biasing. Use Value: 6-pin SOT23 footprint minimizes board area; 12kHz frequency simplifies EMI filtering in dense mixed-signal layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX1697SEUT#TG16 | 35kHz oscillator frequency; 17Ω output resistance; 300µA quiescent current | Better suited for space-constrained designs needing smaller flying capacitors (3.3µF vs. 22µF) | Select when minimizing external component size outweighs EMI and efficiency trade-offs |
| MAX1720EUT#TG16 | Pin-compatible SOT23; 25mA output; 25Ω output resistance; 250kHz frequency | Lower output current and higher impedance limit use to light-load analog biasing only | Choose only for ultra-low-power, low-current bias needs where 60mA capability is unnecessary |
Compared with MAX1697SEUT#TG16 and MAX1720EUT#TG16, the MAX1697REUT#TG16 provides the lowest output resistance and highest efficiency at medium loads, making it optimal for applications demanding stable negative rails under dynamic analog loads-without sacrificing micropower shutdown or thermal safety.
Availability
MAX1697REUT#TG16 is available at Aetrix Electronics and suitable for battery-operated equipment, small LCD panels, and GaAsFET bias supplies requiring stable component supply and long-term production continuity.
Supply support for MAX1697REUT#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 markets.
The MAX1697 family was designed specifically for compact, efficient generation of negative bias voltages in space- and power-constrained portable and embedded systems using only ceramic capacitors.
FAQ
What is the exact oscillator frequency of MAX1697REUT#TG16?
The MAX1697REUT#TG16 operates at a nominal 12kHz oscillator frequency, as indicated by the 'R' suffix in its part number per Maxim's ordering table. This frequency is factory-trimmed and remains stable across temperature (±20% over –40°C to +85°C), enabling predictable capacitor sizing and low EMI performance in sensitive analog environments.
Does MAX1697REUT#TG16 require external diodes or inductors?
No, the MAX1697REUT#TG16 is a fully integrated capacitive charge pump and requires only two external ceramic capacitors (C1 and C2) plus an optional input bypass capacitor. It contains all necessary power MOSFET switches, oscillator, and control logic on-die-no external diodes, inductors, or transformers are needed for basic inverting operation.
What is the maximum continuous output current for MAX1697REUT#TG16?
The MAX1697REUT#TG16 delivers up to 60mA continuous output current into a resistive load while maintaining regulation within datasheet limits. Absolute maximum rated output current is 90mA, but sustained operation above 60mA risks thermal shutdown or reduced efficiency due to 12Ω output resistance causing excessive voltage drop and power dissipation.
How does shutdown mode affect the OUT pin of MAX1697REUT#TG16?
When SHDN is driven low, the MAX1697REUT#TG16 enters shutdown mode and actively pulls the OUT pin to GND through an internal 3Ω switch. This ensures the negative output rail is safely discharged and held near 0V, preventing unintended biasing of downstream analog components during sleep or power-down sequences.
Can MAX1697REUT#TG16 be used with input voltages below 1.5V?
Yes-the MAX1697REUT#TG16 supports an input voltage range of +1.25V to +5.5V, verified down to 1.25V in electrical characteristics tables. At 1.25V input, it delivers approximately –1.2V output at light loads, enabling operation from partially discharged single-cell batteries or low-voltage microcontroller rails.
MAX1697REUT#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:
- 6kHz ~ 21kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX1697REUT#TG16 FAQ
1.How can I place an order for MAX1697REUT#TG16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1697REUT#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 MAX1697REUT#TG16 reliable?
The price and inventory of MAX1697REUT#TG16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1697REUT#TG16 is usually 5 days.
3.What payment methods are accepted for MAX1697REUT#TG16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1697REUT#TG16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1697REUT#TG16?
MAX1697REUT#TG16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1697REUT#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 MAX1697REUT#TG16?
For technical support, including MAX1697REUT#TG16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1697REUT#TG16 requirements.
6.How does Aetrix verify that MAX1697REUT#TG16 is sourced from the original manufacturer or authorized distributors?
All MAX1697REUT#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 MAX1697REUT#TG16 meets industry standards.
7.What is the process for return or replacement of MAX1697REUT#TG16?
All MAX1697REUT#TG16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1697REUT#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 MAX1697REUT#TG16 part is unused and in its original packaging.
Return procedure for MAX1697REUT#TG16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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