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Analog Devices Inc./Maxim Integrated MAX1697TEUT#TG16
- Part No.:
- MAX1697TEUT#TG16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX1697TEUT#TG16.pdf
- Description:
- IC REG CHARGE PUMP INV 60MA SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:4,508
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Product details
Overview
MAX1697TEUT#TG16 from Maxim Integrated is a monolithic CMOS inverting charge-pump DC-DC converter delivering -1×VIN output with 60mA load capability, 125kHz fixed switching frequency, 12Ω typical output resistance, and 1.25V–5.5V input range. It operates in SOT23-6 package with logic-controlled shutdown and is used to generate negative bias for analog circuitry from +3.3V or +5V logic rails.
For engineers reviewing the MAX1697TEUT#TG16 datasheet, MAX1697TEUT#TG16 pinout, MAX1697TEUT#TG16 application, or MAX1697TEUT#TG16 equivalent, key selection factors include guaranteed 125kHz oscillator frequency, shutdown current ≤2nA, thermal shutdown at +150°C, output impedance vs. temperature stability, and compatibility with 1µF ceramic flying/output capacitors.
Technical Context
The MAX1697TEUT#TG16 implements a two-phase switched-capacitor inverter using four on-chip power MOSFETs, with internal oscillator control locked to 125kHz. Its output voltage is nominally -VIN, with regulation determined by switch resistance (4–5Ω), capacitor ESR, and load current.
It features slew-rate-limited switching to reduce EMI, start-up current limiting (170mA typ), and active ground pull-down of OUT during shutdown via 3Ω internal resistance. Thermal shutdown engages at +150°C with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 60mA maximum continuous - supports moderate analog bias loads without external buffering |
| Output Resistance | 12Ω typical - determines voltage droop under load; specified with ≤0.3Ω capacitor ESR |
| Oscillator Frequency | 125kHz fixed - balances efficiency and external capacitor size; lower than MAX1697U (250kHz) but higher than MAX1697R (12kHz) |
| Input Voltage Range | +1.25V to +5.5V - enables operation from single-cell Li-ion, 3.3V, or 5V logic supplies |
| Shutdown Supply Current | ≤2nA - enables ultra-low-power battery hold-up during system sleep modes |
| Thermal Shutdown | +150°C trip, +135°C recovery - protects against sustained overload or poor PCB thermal design |
| Quiescent Supply Current | 350µA typical (VIN = +5V) - sets no-load efficiency floor at light output currents |
Pinout & Package
MAX1697TEUT#TG16 is housed in a RoHS-compliant 6-pin SOT23 package (package code U6F-6), with 1.6mm × 2.9mm footprint and 0.95mm height. Pin 1 indicator is '+' for lead-free variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| C1+ | Positive terminal of flying capacitor | Connects to high-side plate of C1; switches between IN and OUT nodes during charge/discharge phases |
| OUT | Inverting charge-pump output | Delivers regulated negative voltage; actively pulled to GND via 3Ω during shutdown |
| IN | Positive supply input | Accepts 1.25V–5.5V; supplies energy to charge pump; requires local 1µF bypass (C3) |
| C1- | Negative terminal of flying capacitor | Connects to low-side plate of C1; referenced to GND during first phase, to OUT during second phase |
| GND | Power and signal reference | Common return for IN, C1-, SHDN, and internal circuitry; must be low-impedance plane |
| SHDN | Logic-controlled shutdown enable | Active-low input; <0.6V = shutdown (2nA IQ); >2.0V = normal operation; drives internal gate control |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output resistance | 12Ω typical - minimizes voltage drop at 60mA, enabling stable -4.0V output from +4.75V input |
| Fixed 125kHz switching | Optimizes capacitor size vs. efficiency trade-off - uses 2.2µF C1/C2 instead of larger values needed for 12kHz variants |
| Slew-rate limited switching | Reduces high-frequency EMI generation - critical for noise-sensitive analog subsystems like ADC references or op-amp biasing |
| Start-up current limiting | 170mA max - prevents brownout of weak sources (e.g., coin cells or high-ESR batteries) during power-on or wake-up |
| Active output discharge | 3Ω pull-down to GND in shutdown - ensures rapid, controlled discharge of C2 and safe sequencing with other rails |
Applications
| Small LCD Panels | GaAsFET Bias Supplies |
|---|---|
Use Scenario: Generating negative gate bias for STN or segment LCD drivers requiring -15V to -20V from a +3.3V microcontroller rail. IC Role / Device Role / Timing Role: Inverting charge-pump voltage converter providing isolated negative supply with minimal external components. Use Value: Enables compact, low-cost LCD bias without transformers or inductors; 125kHz frequency allows use of small 2.2µF ceramic capacitors. | Use Scenario: Supplying precise negative gate voltage (-2V to -5V) for GaAs FET RF amplifiers in handheld transceivers. IC Role / Device Role / Timing Role: Low-noise, regulated negative bias generator with fast wake-up (<70µs) for burst-mode RF transmission. Use Value: Slew-rate limiting and 12Ω output resistance ensure stable bias under dynamic RF load, minimizing gain variation. |
| Battery-Operated Equipment | Handheld Terminals / PDAs |
Use Scenario: Creating dual-rail ±3.3V supplies from a single 3.7V Li-ion cell for precision analog front-ends in portable test equipment. IC Role / Device Role / Timing Role: Micropower inverting converter supporting deep-sleep states with 2nA shutdown current. Use Value: Extends battery life by >10 years in standby; 1.25V minimum input allows operation down to near end-of-discharge cell voltage. | Use Scenario: Powering RS-232 level shifters or analog sensor interfaces in legacy PDA designs requiring -5V from +5V logic. IC Role / Device Role / Timing Role: Compact SOT23-6 solution replacing discrete charge-pump circuits with higher component count. Use Value: Reduces board area by >70% versus discrete diode-capacitor inverters; eliminates layout sensitivity to parasitic inductance. |
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; higher quiescent current (650µA typ) | Better light-load efficiency at very low IOUT (<5mA); larger output ripple at same capacitor values | Select when prioritizing lowest possible no-load power over output regulation tightness |
| MAX1697UEUT#TG16 | 250kHz oscillator frequency; 12Ω output resistance; 150µA quiescent current (VIN=+5V) | Enables smaller 1µF external capacitors; higher switching losses above 20mA load | Select when board space is constrained and load current remains ≤30mA |
Compared with MAX1697TEUT#TG16, the MAX1697SEUT#TG16 trades higher output impedance for lower switching loss at microamp loads, while the MAX1697UEUT#TG16 achieves smaller capacitors at the cost of increased EMI and reduced efficiency above 20mA - making the T-suffix optimal for balanced 125kHz performance across 10–60mA loads.
Availability
MAX1697TEUT#TG16 is available at Aetrix Electronics and suitable for battery-powered instrumentation, handheld RF modules, portable medical sensors, and industrial HMI displays requiring stable component supply with long-term manufacturability.
Supply support for MAX1697TEUT#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) designs precision analog, mixed-signal, and power-management ICs for industrial, automotive, and communications applications.
The MAX1697 series targets space-constrained, low-power systems needing clean, efficient negative voltage generation - emphasizing micropower shutdown, EMI control, and robust thermal protection in ultra-small packages.
FAQ
What is the exact switching frequency of MAX1697TEUT#TG16?
The MAX1697TEUT#TG16 has a factory-trimmed, fixed switching frequency of 125kHz. This value is guaranteed across -40°C to +85°C and is not adjustable. It is selected via the 'T' suffix per Maxim's ordering table and differs from the 12kHz (R), 35kHz (S), and 250kHz (U) variants. Frequency stability is maintained by on-chip oscillator circuitry independent of input voltage or load.
Does MAX1697TEUT#TG16 require external resistors for configuration?
No, MAX1697TEUT#TG16 is fully self-contained and requires no external resistors. All functionality - including oscillator frequency, shutdown threshold, and current limiting - is implemented with internal circuitry. Only two external 2.2µF ceramic capacitors (C1 and C2) and an optional 1µF input bypass capacitor (C3) are needed for basic operation per the typical application circuit.
What is the maximum continuous output current specification for MAX1697TEUT#TG16?
The MAX1697TEUT#TG16 is rated for 60mA continuous output current under conditions of VIN ≥ 2.5V, TA ≤ +85°C, and with recommended 2.2µF ceramic capacitors. Absolute maximum short-circuit output current is 170mA, but sustained operation above 60mA will cause thermal shutdown activation unless PCB thermal design exceeds 1.1W dissipation capability.
How does the shutdown function behave on MAX1697TEUT#TG16?
When SHDN is driven below 0.6V, MAX1697TEUT#TG16 enters shutdown mode: switching halts, supply current drops to ≤2nA, and OUT is actively pulled to GND through a 3Ω internal MOSFET. Wake-up time from shutdown to 90% of final output voltage is typically 50µs with 2.2µF capacitors. The SHDN pin has 10nA bias current and accepts standard CMOS logic levels.
Can MAX1697TEUT#TG16 be used to generate voltages other than -VIN?
MAX1697TEUT#TG16 is designed exclusively as a -1×VIN inverter and cannot generate doubled (+2×VIN) or fractional outputs. However, it can be cascaded with a second MAX1697TEUT#TG16 to achieve ~-2×VIN (with derating due to first-stage output resistance), or combined with external diodes/capacitors in nonstandard topologies - though such configurations void guaranteed specifications and are not supported in the datasheet.
MAX1697TEUT#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):
- 1.6V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- -Vin, 2Vin
- Voltage - Output (Max):
- -
- Current - Output:
- 60mA
- Frequency - Switching:
- 60kHz ~ 200kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX1697TEUT#TG16 FAQ
1.How can I place an order for MAX1697TEUT#TG16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX1697TEUT#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 MAX1697TEUT#TG16 reliable?
The price and inventory of MAX1697TEUT#TG16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX1697TEUT#TG16 is usually 5 days.
3.What payment methods are accepted for MAX1697TEUT#TG16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX1697TEUT#TG16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX1697TEUT#TG16?
MAX1697TEUT#TG16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX1697TEUT#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 MAX1697TEUT#TG16?
For technical support, including MAX1697TEUT#TG16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX1697TEUT#TG16 requirements.
6.How does Aetrix verify that MAX1697TEUT#TG16 is sourced from the original manufacturer or authorized distributors?
All MAX1697TEUT#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 MAX1697TEUT#TG16 meets industry standards.
7.What is the process for return or replacement of MAX1697TEUT#TG16?
All MAX1697TEUT#TG16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX1697TEUT#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 MAX1697TEUT#TG16 part is unused and in its original packaging.
Return procedure for MAX1697TEUT#TG16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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