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Analog Devices Inc./Maxim Integrated MAX1697REUT#G16
- Part No.:
- MAX1697REUT#G16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1697REUT#G16.pdf
- Description:
- IC REG CHARGE PUMP INV 60MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,524
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Product details
Overview
MAX1697REUT#G16 from Maxim Integrated is a monolithic CMOS inverting charge-pump DC-DC converter delivering -1×VIN output with 60mA load capability, 12Ω typical output resistance, and 12kHz oscillator frequency. It operates from +1.25V to +5.5V input, features logic-controlled shutdown, and targets space-constrained analog biasing in portable electronics.
For engineers reviewing the MAX1697REUT#G16 datasheet, MAX1697REUT#G16 pinout, MAX1697REUT#G16 application, or MAX1697REUT#G16 equivalent, key selection criteria include guaranteed 60mA inverting output at 12kHz, ultra-low 12Ω output impedance, SOT23-6 package compatibility, and thermal shutdown protection up to +150°C.
Technical Context
The MAX1697REUT#G16 implements a two-phase switched-capacitor inverter using four on-chip power MOSFETs and internal oscillator control. Its 12kHz switching frequency minimizes EMI while enabling use of small external 1µF ceramic capacitors (C1, C2) for compact layout.
It delivers regulated -VIN output with start-up current limiting (170mA typ), slew-rate controlled edges to reduce noise, and active ground pull-down (3Ω) during shutdown. Thermal shutdown activates at +150°C with 15°C hysteresis, ensuring robust fault protection in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 60mA maximum continuous - supports analog circuitry requiring stable negative rail under moderate load |
| Output Resistance | 12Ω typical - ensures minimal voltage droop across full load range at 12kHz operation |
| Oscillator Frequency | 12kHz - optimized for low EMI and compatibility with low-cost, small-footprint 1µF ceramic capacitors |
| Input Voltage Range | +1.25V to +5.5V - enables direct interface with single-cell Li-ion, alkaline, or logic-supply rails |
| Shutdown Supply Current | 2nA - preserves battery life in always-on portable devices during inactive periods |
| Thermal Shutdown Threshold | +150°C with 15°C hysteresis - prevents latch-up and enables safe recovery after overtemperature events |
| Quiescent Supply Current | 150µA typical - maintains high efficiency at light loads without compromising startup reliability |
Pinout & Package
MAX1697REUT#G16 is housed in a RoHS-compliant 6-pin SOT23 package (U6F-6 outline), with pin 1 marked by a '+' indicator per Maxim's lead-free identification standard. The package measures 2.9mm × 1.6mm × 1.1mm and supports JEDEC J-STD-020A reflow profiles only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+ | Positive flying capacitor terminal | Connects to top plate of external pump capacitor (C1); critical path for charge transfer timing and EMI control |
| OUT | Inverting charge-pump output | Delivers regulated -VIN; actively pulled to GND via 3Ω switch during shutdown |
| IN | Input supply voltage | Accepts +1.25V to +5.5V; internal current limiting protects weak sources during startup |
| C1- | Negative flying capacitor terminal | Completes flying capacitor loop; paired with C1+ to form charge-transfer network |
| GND | Ground reference | Common return for all internal circuits and external capacitors; requires low-impedance PCB plane |
| SHDN | Logic-controlled shutdown input | High = normal operation; low = shutdown mode with 2nA IQ and active OUT-to-GND discharge |
Key Features
| Feature | Design Value |
|---|---|
| 60mA inverting output | Enables direct generation of negative analog supply from single positive rail without inductors |
| 12Ω output resistance | Minimizes voltage deviation under load, supporting precision op-amp and ADC biasing |
| 12kHz fixed-frequency operation | Reduces radiated emissions and simplifies EMI filtering versus higher-frequency alternatives |
| 2nA shutdown current | Extends shelf life and runtime in battery-backed systems requiring long-term standby |
| Thermal shutdown with hysteresis | Prevents thermal runaway during sustained overload or poor heatsinking in sealed enclosures |
Applications
| Small LCD Panels | GaAsFET Bias Supplies |
|---|---|
Use Scenario: Powering segment drivers and contrast control in handheld LCD modules operating from 3.3V logic rails. IC Role / Device Role / Timing Role: Inverting charge pump generating stable -3.3V bias from main 3.3V supply. Use Value: Eliminates need for external inductors or dual-rail supplies while maintaining display contrast stability across 0–60mA load variation. | Use Scenario: Providing negative gate bias for GaAs FET RF amplifiers in portable transceivers. IC Role / Device Role / Timing Role: Low-noise inverting regulator delivering precise -5V from 5V system rail. Use Value: 12kHz switching minimizes RF interference in sensitive front-end stages; 12Ω output resistance ensures stable bias under modulation peaks. |
| Battery-Operated Equipment | Handheld Terminals & PDAs |
Use Scenario: Generating negative supply for RS-232 level shifters or audio codec bias in AA/AAA-powered devices. IC Role / Device Role / Timing Role: Micropower inverter enabling dual-rail operation from single alkaline cell stack. Use Value: 150µA quiescent current and 2nA shutdown preserve battery capacity; start-up current limiting prevents cell voltage sag during wake-up. | Use Scenario: Supplying negative voltage for touch-screen controller analog front-end and flash memory programming. IC Role / Device Role / Timing Role: Compact SOT23-6 inverter integrated directly into PDA motherboard near processor I/O section. Use Value: 2.9mm × 1.6mm footprint conserves board area; thermal shutdown protects against localized heating in dense handheld 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#G16 | 35kHz oscillator frequency; 17Ω output resistance; 300µA quiescent current | Better suited for applications requiring smaller external capacitors but higher ripple tolerance | Select when minimizing BOM count with 3.3µF C1/C2 is prioritized over lowest EMI |
| MAX1697TEUT#G16 | 125kHz oscillator frequency; 17Ω output resistance; 650µA quiescent current | Enables smallest possible capacitor footprint (1µF) but increases switching losses at high load | Choose for ultra-compact designs where PCB area is more constrained than efficiency or noise |
Compared with MAX1697SEUT#G16 and MAX1697TEUT#G16, the MAX1697REUT#G16 provides the lowest EMI signature and highest efficiency at light-to-moderate loads due to its 12kHz frequency and 150µA IQ, making it optimal for noise-sensitive analog subsystems in portable equipment.
Availability
MAX1697REUT#G16 is available at Aetrix Electronics and suitable for battery-operated equipment, handheld terminals & PDAs, and small LCD panels requiring stable component supply with guaranteed long-term sourcing.
Supply support for MAX1697REUT#G16 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 and mixed-signal ICs for power, interface, and sensing applications.
The MAX1697REUT#G16 belongs to Maxim's ultra-small charge-pump family designed specifically for space-constrained, battery-powered systems needing efficient, inductorless negative voltage generation from low-input rails.
FAQ
What is the exact oscillator frequency of the MAX1697REUT#G16?
The MAX1697REUT#G16 has a fixed 12kHz oscillator frequency, as indicated by the 'R' suffix in its part number per Maxim's ordering table. This frequency is factory-trimmed and guaranteed across -40°C to +85°C, enabling predictable EMI behavior and compatibility with 1µF ceramic flying and reservoir capacitors in the typical application circuit.
Does the MAX1697REUT#G16 require external components to operate?
Yes, the MAX1697REUT#G16 requires two external 1µF ceramic capacitors: C1 (flying capacitor) between C1+ and C1-, and C2 (reservoir capacitor) between OUT and GND. An optional input bypass capacitor (C3) equal to C1 is recommended to suppress supply noise. No inductors or diodes are needed - the device integrates all switching MOSFETs and control logic on-die.
How does shutdown functionality work on the MAX1697REUT#G16?
Driving the SHDN pin low places the MAX1697REUT#G16 into shutdown mode, halting the internal oscillator and reducing supply current to 2nA. During shutdown, the OUT pin is actively pulled to GND through a 3Ω internal switch, ensuring defined logic levels and preventing floating outputs in battery-powered systems.
What is the maximum continuous output current of the MAX1697REUT#G16?
The MAX1697REUT#G16 delivers up to 60mA continuous output current at the -VIN inverting output, specified under conditions of VIN = +5V, TA = +25°C, and proper external capacitor selection (1µF ceramic, ≤0.3Ω ESR). Output current capability decreases slightly at lower input voltages or elevated temperatures, as shown in the "OUTPUT CURRENT vs. CAPACITANCE" curves for the R variant.
Is the MAX1697REUT#G16 RoHS-compliant and lead-free?
Yes, the MAX1697REUT#G16 is RoHS-compliant and lead-free, as confirmed by the '+T' package suffix in its ordering code and Maxim's documentation. The top mark uses a '+' symbol to indicate lead-free construction per Maxim's marking standard, and the device conforms to JEDEC J-STD-020A reflow guidelines for Pb-free soldering.
MAX1697REUT#G16 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#G16 FAQ
1.How can I place an order for MAX1697REUT#G16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1697REUT#G16 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#G16 reliable?
The price and inventory of MAX1697REUT#G16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1697REUT#G16 is usually 5 days.
3.What payment methods are accepted for MAX1697REUT#G16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1697REUT#G16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1697REUT#G16?
MAX1697REUT#G16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1697REUT#G16 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#G16?
For technical support, including MAX1697REUT#G16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1697REUT#G16 requirements.
6.How does Aetrix verify that MAX1697REUT#G16 is sourced from the original manufacturer or authorized distributors?
All MAX1697REUT#G16 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#G16 meets industry standards.
7.What is the process for return or replacement of MAX1697REUT#G16?
All MAX1697REUT#G16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1697REUT#G16, 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#G16 part is unused and in its original packaging.
Return procedure for MAX1697REUT#G16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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