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Analog Devices Inc./Maxim Integrated MAX16945TGUT#TG16
- Part No.:
- MAX16945TGUT#TG16
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX16945TGUT#TG16.pdf
- Description:
- IC REG CHARGE PUMP SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,691
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Product details
Overview
MAX16945TGUT#TG16 from Maxim Integrated is an AEC-Q100 qualified, monolithic CMOS inverting charge pump IC that generates a regulated negative output voltage (–VIN) from +1.4V to +5.5V input. It delivers up to 30mA continuous output current at +105°C, features 12Ω typical output resistance, operates at 125kHz, and includes slew-rate limited switching to reduce EMI-designed specifically for automotive infotainment displays and GaAsFET bias supplies.
For engineers reviewing the MAX16945TGUT#TG16 datasheet, MAX16945TGUT#TG16 pinout, MAX16945TGUT#TG16 application, or MAX16945TGUT#TG16 equivalent, key selection criteria include guaranteed 30mA load capability at high temperature, ultra-low 0.1µA shutdown current, SOT23-6 footprint compatibility, AEC-Q100 qualification, and integrated slew-rate control for EMI-sensitive vehicle environments.
Technical Context
The MAX16945TGUT#TG16 implements a two-phase switched-capacitor inverter using four on-chip power MOSFETs and internal oscillator control. Its fixed 125kHz switching frequency enables use of small 2.2µF ceramic flying and reservoir capacitors while maintaining stable regulation across –40°C to +105°C.
Startup current is internally limited to 170mA (typ), and the device actively pulls OUT to GND via a 3Ω internal switch during logic-controlled shutdown. Output impedance is dominated by internal switch resistance (≈4–5Ω) and external capacitor ESR, with total ROUT ≤36Ω over full temperature range at 30mA load.
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 regulators. |
| Output Current | 30mA guaranteed at +105°C - enables reliable biasing of GaAsFETs and LCD contrast circuits in under-hood automotive modules. |
| Oscillator Frequency | 125kHz (typ) - balances efficiency and EMI; allows compact 2.2µF ceramic capacitor sizing per stage. |
| Output Resistance | 12Ω (typ) at +25°C - ensures ≤0.36V dropout at 30mA, critical for stable –3.3V or –5V rail generation. |
| Shutdown Current | 0.03µA max at +105°C - preserves battery life in always-on automotive subsystems during sleep mode. |
| Operating Temp | –40°C to +105°C - meets extended automotive ambient requirements for body control and display units. |
| AEC-Q100 Grade | Grade 2 qualified - certified for automotive applications requiring robustness against thermal cycling and vibration. |
Pinout & Package
MAX16945TGUT#TG16 is housed in a RoHS-compliant 6-pin SOT23 package (package code U6F+6), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and exposed pad for thermal enhancement. Pin 4 is GND and serves as primary thermal and electrical reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Inverting charge-pump output | Delivers regulated –VIN voltage; actively pulled to GND via 3Ω switch during shutdown. |
| 2 (IN) | Positive supply input | Accepts +1.4V to +5.5V; requires local 1µF bypass capacitor (C3) for noise suppression. |
| 3 (C1–) | Flying capacitor negative terminal | Connects to negative side of C1; forms half of charge-transfer path with C1+. |
| 4 (GND) | Ground reference | Primary return path for all currents; must be low-impedance and tied directly to PCB ground plane. |
| 5 (SHDN) | Logic-controlled shutdown enable | Active-low input; <0.2V = shutdown (2nA IQ), >2.1V = active; no external pull-up required. |
| 6 (C1+) | Flying capacitor positive terminal | Connects to positive side of C1; switches between IN and OUT phases to invert voltage. |
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 head units. |
| Startup current limiting | Clamps inrush to 170mA (typ), preventing brownout on weak sources like alkaline batteries or long PCB traces. |
| Integrated GND pull-down in shutdown | 3Ω active discharge path on OUT ensures fast, deterministic rail collapse-avoids floating negative supplies in safety-critical systems. |
| Low 12Ω output resistance | Enables stable –3.3V/–5V generation under 30mA load with <0.4V droop, eliminating need for post-regulation LDOs. |
| AEC-Q100 qualification | Validated for automotive Grade 2 operation (–40°C to +105°C), including HTOL, TC, and ESD testing per JEDEC standards. |
Applications
| Automotive Infotainment Displays | GaAsFET RF Bias Supplies |
|---|---|
Use Scenario: Generating –5V bias for TFT-LCD source drivers in center-stack touchscreens exposed to engine bay thermal transients. IC Role / Device Role / Timing Role: Inverting charge pump providing stable negative rail independent of main 12V system voltage fluctuations. Use Value: Eliminates need for isolated DC/DC converters; 30mA output sustains contrast control across –40°C to +105°C without derating. | Use Scenario: Supplying –3.3V gate bias to GaAsFET power amplifiers in automotive telematics antennas. IC Role / Device Role / Timing Role: Low-noise, EMI-controlled negative voltage generator synchronized to RF transmit bursts. Use Value: Slew-rate limiting prevents coupling into adjacent RF receive paths; 0.1µA shutdown extends battery backup duration. |
| Industrial Handheld Terminals | Small-Segment LCD Panels |
Use Scenario: Powering OLED display backplanes in ruggedized warehouse scanners operating on single-cell Li-ion. IC Role / Device Role / Timing Role: Efficient inverter converting 3.6V battery to –3.3V for display driver ICs during intermittent wake cycles. Use Value: 125kHz operation avoids audible noise; 0.03µA shutdown current extends shelf life beyond 12 months. | Use Scenario: Providing –2.5V contrast voltage for 128×64 monochrome STN LCDs in automotive instrument clusters. IC Role / Device Role / Timing Role: Compact, thermally robust charge pump delivering precise inverted rail from 3.3V microcontroller supply. Use Value: SOT23-6 footprint fits tight board space; 12Ω ROUT ensures stable contrast across wide temperature range. |
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 | Higher 250kHz switching frequency; 20mA output rating at +85°C (not +105°C); no AEC-Q100 qualification. | Limited to industrial handhelds or non-automotive displays; unsuitable for under-hood deployment. | Select only if higher frequency (reduced capacitor size) outweighs temperature and qualification requirements. |
| LM27761DSGR | Integrated LDO post-regulator; 200mA output but larger 10-pin WSON package; 1.8V–5.5V input; not AEC-Q100 rated. | Better for noise-sensitive analog circuits needing ultra-low ripple, but incompatible with space-constrained automotive SOT23 layouts. | Choose when output ripple <10mV is mandatory and board area permits 3×3mm WSON. |
Compared with TPS60403DBVR and LM27761DSGR, MAX16945TGUT#TG16 uniquely combines AEC-Q100 Grade 2 qualification, 30mA output at +105°C, and SOT23-6 footprint-making it the only drop-in solution for thermally demanding automotive display bias rails where layout and qualification are non-negotiable.
Availability
MAX16945TGUT#TG16 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 production lifecycles.
Supply support for MAX16945TGUT#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 automotive, industrial, and communications markets.
The MAX16945 belongs to Maxim's automotive-grade power management portfolio, engineered specifically to replace discrete inverter solutions in EMI-sensitive, high-reliability vehicle subsystems such as digital clusters and ADAS displays.
FAQ
What is the maximum continuous output current of the MAX16945TGUT#TG16 at +105°C?
The MAX16945TGUT#TG16 guarantees 30mA continuous output current at +105°C, verified across production lots per AEC-Q100 stress testing. This rating assumes 2.2µF ceramic flying and reservoir capacitors with ≤0.3Ω ESR, and accounts for increased output resistance (≤36Ω) at elevated temperature. Exceeding 30mA may cause thermal shutdown or output voltage droop beyond specification.
Does the MAX16945TGUT#TG16 require external components to operate?
Yes, the MAX16945TGUT#TG16 requires two external 2.2µF ceramic capacitors: C1 (flying capacitor) between pins C1+ and C1–, and C2 (reservoir capacitor) between OUT and GND. An optional 1µF input bypass capacitor (C3) between IN and GND is recommended to suppress switching noise on the input rail. No inductors or diodes are needed-enabling true inductorless inverter operation.
How does the MAX16945TGUT#TG16 achieve EMI reduction in automotive applications?
The MAX16945TGUT#TG16 integrates slew-rate limited switching on all internal MOSFET gates, which controls edge rates of the 125kHz clock signal. This reduces high-frequency harmonic content above 30MHz, helping systems meet CISPR-25 Class 5 radiated emissions limits without additional shielding or filtering-critical for placement near sensitive RF receivers in automotive head units.
Is the MAX16945TGUT#TG16 pin-compatible with other Maxim charge pumps?
No, the MAX16945TGUT#TG16 has a unique 6-pin SOT23 pinout optimized for inverting topology (C1+, C1–, OUT, IN, SHDN, GND). It is not pin-compatible with MAX680, MAX660, or MAX1722 series devices, which use different pin assignments and lack slew-rate control or AEC-Q100 qualification. Layout reuse requires verification against the MAX16945TGUT#TG16-specific footprint (U6F+6).
What happens to the OUT pin during shutdown of the MAX16945TGUT#TG16?
During shutdown (SHDN < 0.2V), the MAX16945TGUT#TG16 halts switching and actively pulls the OUT pin to GND through an internal 3Ω transistor switch. This ensures rapid, controlled discharge of the reservoir capacitor C2 and prevents the negative output from floating-a critical safety feature for systems where uncontrolled negative voltage could damage downstream logic or display drivers.
MAX16945TGUT#TG16 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#TG16 FAQ
1.How can I place an order for MAX16945TGUT#TG16 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX16945TGUT#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 MAX16945TGUT#TG16 reliable?
The price and inventory of MAX16945TGUT#TG16 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX16945TGUT#TG16 is usually 5 days.
3.What payment methods are accepted for MAX16945TGUT#TG16?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX16945TGUT#TG16 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX16945TGUT#TG16?
MAX16945TGUT#TG16 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX16945TGUT#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 MAX16945TGUT#TG16?
For technical support, including MAX16945TGUT#TG16 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX16945TGUT#TG16 requirements.
6.How does Aetrix verify that MAX16945TGUT#TG16 is sourced from the original manufacturer or authorized distributors?
All MAX16945TGUT#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 MAX16945TGUT#TG16 meets industry standards.
7.What is the process for return or replacement of MAX16945TGUT#TG16?
All MAX16945TGUT#TG16 units undergo pre-shipment inspection (PSI). If there is an issue with MAX16945TGUT#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 MAX16945TGUT#TG16 part is unused and in its original packaging.
Return procedure for MAX16945TGUT#TG16:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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