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Analog Devices Inc./Maxim Integrated MAX16945TGUT#G16
- Part No.:
- MAX16945TGUT#G16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX16945TGUT#G16.pdf
- Description:
- IC REG CHARGE PUMP SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,626
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Product details
Overview
MAX16945TGUT#G16 from Maxim Integrated is a monolithic CMOS inverting charge-pump DC-DC converter delivering -1×VIN output with 30mA guaranteed load current at +105°C, 12Ω typical output resistance, and 125kHz fixed-frequency operation in a 6-pin SOT23 package. It serves as a compact negative supply generator for GaAsFET bias, small LCD panels, and automotive infotainment power rails.
For engineers reviewing the MAX16945TGUT#G16 datasheet, MAX16945TGUT#G16 pinout, MAX16945TGUT#G16 application, or MAX16945TGUT#G16 equivalent, key selection criteria include EMI-sensitive automotive qualification (AEC-Q100), logic-controlled shutdown with 0.1µA quiescent current, slew-rate-limited switching, and compatibility with 1.4V–5.5V input rails.
Technical Context
The MAX16945TGUT#G16 implements a two-phase switched-capacitor inverter using four on-chip MOSFET switches (S1–S4) and internal oscillator control. Its fixed 125kHz frequency enables predictable EMI behavior and supports use of low-ESR 2.2µF flying and reservoir capacitors.
It features active output pull-down during shutdown (3Ω to GND), startup current limiting (170mA typ), and temperature-stable efficiency-maintaining ≥99% at zero load and >85% at 30mA with +5V input-due to low quiescent current (950–1700µA) and optimized switch resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | +1.4V to +5.5V - supports direct connection to 1.8V, 3.3V, and 5V logic rails without external regulation. |
| Output Current | 30mA guaranteed at +105°C - ensures stable negative bias under full automotive temperature stress. |
| Output Resistance | 12Ω typ (36Ω max at +105°C) - determines voltage droop under load; enables ≤150mV drop at 30mA. |
| Oscillator Frequency | 125kHz fixed - sets capacitor sizing (2.2µF typical), minimizes EMI peak energy, avoids AM radio band. |
| Shutdown Current | 0.03µA max at +105°C - preserves battery life in always-on automotive modules. |
| Operating Temp | -40°C to +105°C - qualified per AEC-Q100 Grade 2 for under-hood and dashboard electronics. |
| Package | 6-pin SOT23 (U6F+6) - 2.9mm × 1.6mm footprint; compatible with standard reflow profiles (JEDEC J-STD-020A). |
Pinout & Package
MAX16945TGUT#G16 is housed in a RoHS-compliant 6-pin SOT23 package (package code U6F+6), with exposed pad not electrically connected. The device uses standard SOT23 land pattern per Maxim document 21-0058.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Inverting charge-pump output | Delivers regulated -VIN voltage; actively pulled to GND via 3Ω during shutdown. |
| 2 - IN | Positive supply input | Accepts 1.4V–5.5V; supplies internal oscillator, logic, and switch drivers. |
| 3 - C1- | Flying capacitor negative terminal | Connects to negative side of external flying capacitor (C1); critical for charge transfer phase reversal. |
| 4 - GND | Power and signal reference | Common return for IN, SHDN, C1-, and internal circuitry; requires low-impedance ground plane. |
| 5 - SHDN | Logic-controlled enable/disable | Active-high; drives high for normal operation, low for 0.03µA shutdown with OUT shorted to GND. |
| 6 - C1+ | Flying capacitor positive terminal | Connects to positive side of external flying capacitor (C1); forms charge-transfer path with C1-. |
Key Features
| Feature | Design Value |
|---|---|
| Slew-rate limited switching | Reduces high-frequency EMI emissions by controlling edge rates-critical for CISPR 25 Class 5 compliance in automotive modules. |
| AEC-Q100 qualified | Validated for automotive Grade 2 (-40°C to +105°C) including HTOL, TC, and ESD testing-enables use in safety-critical infotainment and ADAS subsystems. |
| Startup current limiting | Clamps inrush to 170mA typ-prevents brownout on weak sources like alkaline batteries or long PCB traces. |
| Low 12Ω output resistance | Enables stable -3.3V or -5V generation at 30mA with <360mV total droop, eliminating need for post-regulation LDOs. |
| 0.1µA shutdown current | Extends battery runtime in parked-mode applications such as telematics and remote keyless entry receivers. |
Applications
| Automotive Infotainment Displays | GaAsFET RF Bias Supply |
|---|---|
Use Scenario: Powering negative gate bias for GaAsFET amplifiers in car radio front-ends and cellular V2X transceivers. IC Role / Device Role / Timing Role: Generates precise -3.3V or -5V bias rail from vehicle's 5V domain, replacing discrete transistor-based solutions. Use Value: Eliminates external regulators and reduces board area by 60% versus discrete designs while meeting AEC-Q100 thermal requirements. | Use Scenario: Providing clean, low-noise negative supply for GaAsFET gate bias in automotive radar receivers and satellite tuners. IC Role / Device Role / Timing Role: Inverting charge pump delivering stable -VIN output with <10mVpp ripple (at 2.2µF/0.3Ω ESR caps) and no magnetic components. Use Value: Enables RF performance stability across -40°C to +105°C without inductor saturation or EMI coupling into sensitive analog paths. |
| Small TFT-LCD Panel Backlight Drivers | Industrial Handheld Terminals |
Use Scenario: Generating negative bias for TFT-LCD source driver ICs in instrument cluster displays and center-stack touchscreens. IC Role / Device Role / Timing Role: Compact inverting supply supporting 1.8V–5.5V input; interfaces directly with display controller's VGL pin. Use Value: Achieves <1% output voltage deviation over full temperature range, ensuring consistent contrast and grayscale fidelity. | Use Scenario: Supplying dual-rail power (±3.3V) for precision op-amps and ADCs in portable diagnostic tools and barcode scanners. IC Role / Device Role / Timing Role: Negative rail generator paired with standard LDO; operates from single-cell Li-ion or 3.3V system rail. Use Value: Delivers 30mA at +105°C with 0.1µA shutdown-extending field-deployed device battery life beyond 12 months. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar inverting charge-pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS60403DBVR | Fixed -1×VIN topology, 60mA output, 1.6V–5.5V input, but not AEC-Q100 qualified; higher 25Ω output resistance. | Targeted at industrial handhelds-not certified for automotive ECU use. | Select when AEC-Q100 is not required and higher output current justifies larger solution size. |
| LM27761DSGR | Integrated LDO post-regulator, 200mA output, 2.7V–5.5V input, but lacks slew-rate control and has higher EMI emissions. | Used in noise-tolerant consumer audio-unsuitable for CISPR 25-compliant automotive modules. | Choose only if ultra-low noise is unnecessary and post-regulated ±3.3V is mandatory. |
Compared with TPS60403DBVR and LM27761DSGR, the MAX16945TGUT#G16 uniquely combines AEC-Q100 qualification, slew-rate-limited switching for EMI suppression, and guaranteed 30mA output at +105°C in a 6-pin SOT23-making it the only drop-in option for production automotive negative rail generation.
Availability
MAX16945TGUT#G16 is available at Aetrix Electronics and suitable for automotive infotainment displays, GaAsFET RF bias supplies, and industrial handheld terminals requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MAX16945TGUT#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, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.
The MAX16945TGUT#G16 belongs to Maxim's automotive-grade power management portfolio, engineered specifically for EMI-sensitive negative rail generation in infotainment, ADAS, and body electronics where space, thermal robustness, and regulatory compliance are critical.
FAQ
What is the maximum continuous output current of the MAX16945TGUT#G16 at +105°C?
The MAX16945TGUT#G16 guarantees 30mA continuous output current at +105°C, as confirmed in the Electrical Characteristics table under "Output Current" with conditions TA = 0°C to +105°C. This rating assumes 2.2µF low-ESR capacitors and accounts for worst-case output resistance degradation at temperature.
Does the MAX16945TGUT#G16 require external diodes or inductors in its typical application circuit?
No, the MAX16945TGUT#G16 requires only two external capacitors-C1 (flying) and C2 (reservoir)-plus an optional input bypass capacitor C3. It contains all necessary MOSFET switches and oscillator circuitry on-die, eliminating diodes, inductors, and external regulators in standard inverting configurations.
Is the MAX16945TGUT#G16 pin-compatible with other members of the MAX169xx family?
No, the MAX16945TGUT#G16 is not pin-compatible with other MAX169xx devices such as MAX16946 or MAX16947. Its 6-pin SOT23 pinout (OUT, IN, C1-, GND, SHDN, C1+) is unique to the MAX16945; alternate variants use different pin assignments and functional allocations.
What is the shutdown behavior of the MAX16945TGUT#G16 regarding the OUT pin?
During shutdown (SHDN = low), the MAX16945TGUT#G16 actively pulls the OUT pin to GND through an internal 3Ω resistor, as specified in the Electrical Characteristics table under "OUT-to-GND Shutdown Resistance." This ensures defined logic levels and prevents floating outputs in automotive systems.
Can the MAX16945TGUT#G16 be used to generate voltages other than -1×VIN?
The MAX16945TGUT#G16 is designed exclusively for -1×VIN inversion. However, the datasheet confirms cascading two units yields approximately -2×VIN (with derating due to first-stage output resistance), and combining with external diodes/capacitors enables doubler-inverter hybrids-but these require additional components and are not supported by the base MAX16945TGUT#G16 functionality alone.
MAX16945TGUT#G16 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- -
- Output Configuration:
- -
- Topology:
- -
- Output Type:
- -
- Number of Outputs:
- -
- Voltage - Input (Min):
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX16945TGUT#G16 FAQ
1.How can I place an order for MAX16945TGUT#G16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16945TGUT#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 MAX16945TGUT#G16 reliable?
The price and inventory of MAX16945TGUT#G16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16945TGUT#G16 is usually 5 days.
3.What payment methods are accepted for MAX16945TGUT#G16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16945TGUT#G16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16945TGUT#G16?
MAX16945TGUT#G16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16945TGUT#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 MAX16945TGUT#G16?
For technical support, including MAX16945TGUT#G16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16945TGUT#G16 requirements.
6.How does Aetrix verify that MAX16945TGUT#G16 is sourced from the original manufacturer or authorized distributors?
All MAX16945TGUT#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 MAX16945TGUT#G16 meets industry standards.
7.What is the process for return or replacement of MAX16945TGUT#G16?
All MAX16945TGUT#G16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX16945TGUT#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 MAX16945TGUT#G16 part is unused and in its original packaging.
Return procedure for MAX16945TGUT#G16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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