Analog Devices Inc./Maxim Integrated MAX16945TGUT/V+T

Overview

MAX16945TGUT/V+T from Maxim Integrated is an AEC-Q100 qualified, monolithic 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 - used for generating negative bias supplies in EMI-sensitive automotive displays and GaAsFET circuits.

For engineers reviewing the MAX16945TGUT/V+T datasheet, MAX16945TGUT/V+T pinout, MAX16945TGUT/V+T application, or MAX16945TGUT/V+T equivalent, key selection criteria include input voltage range (1.4V–5.5V), shutdown current (≤0.03µA), slew-rate-limited switching for EMI reduction, RoHS-compliant +/V automotive qualification, and compatibility with 1µF–2.2µF low-ESR flying/output capacitors.

Technical Context

The MAX16945TGUT/V+T implements a two-phase switched-capacitor inverter using four on-chip power MOSFETs and internal oscillator control. It operates with no inductors, relying on external C1 (flying) and C2 (reservoir) capacitors to generate regulated inverted output voltage.

Its architecture features startup current limiting (170mA typ), logic-controlled shutdown with active GND pull-down (3Ω), and temperature-stable 125kHz oscillator (±30kHz over -40°C to +105°C). Output impedance is dominated by switch R_SW (~4.5Ω) and capacitor ESR, with total ROUT ≤36Ω across full temperature range.

Key Specifications

Pinout & Package

MAX16945TGUT/V+T is housed in a RoHS-compliant, lead(Pb)-free 6-pin SOT23 package (package code U6F+6), with 0.95mm pitch, 2.9mm × 1.6mm footprint, and JEDEC-standard thermal profile requirements.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar inverting charge-pump applications.

Compared with TPS60403DBVR and LM27761DSGR, the MAX16945TGUT/V+T uniquely combines AEC-Q100 Grade 2 qualification, 125kHz EMI-optimized frequency, and guaranteed 30mA output at +105°C - making it the only drop-in solution for automotive display and RF bias where thermal robustness and regulatory compliance are non-negotiable.

Availability

MAX16945TGUT/V+T is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor transmitters, and portable diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX16945TGUT/V+T 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 high-performance analog, mixed-signal, and power-management ICs for automotive, industrial, and communications markets.

The MAX16945TGUT/V+T belongs to Maxim's automotive-grade power-management portfolio, engineered specifically for EMI-sensitive, thermally demanding applications such as LCD biasing and RF amplifier biasing in vehicles.

FAQ

What is the maximum continuous output current of the MAX16945TGUT/V+T at +105°C?

The MAX16945TGUT/V+T guarantees 30mA continuous output current at +105°C, as specified in the Electrical Characteristics table under "Output Current" with conditions RL = 5kΩ and TA = 0°C to +105°C. This rating ensures reliable operation in under-hood automotive environments where thermal derating is critical. The device can deliver up to 60mA RMS under short-duration loads, but sustained operation above 30mA at high temperature risks exceeding thermal limits.

Does the MAX16945TGUT/V+T require external components to operate?

Yes, the MAX16945TGUT/V+T requires two external capacitors: a flying capacitor (C1) connected between pins C1+ and C1−, and a reservoir capacitor (C2) connected between OUT and GND. A 1µF–2.2µF low-ESR ceramic capacitor is recommended for each. An optional input bypass capacitor (C3) equal to C1 further improves noise immunity. No inductors or diodes are needed - the full inverter function is integrated on-die.

How does the shutdown feature of the MAX16945TGUT/V+T behave electrically?

When SHDN is driven low, the MAX16945TGUT/V+T halts internal switching, reduces supply current to ≤0.03µA at +105°C, and actively pulls the OUT pin to GND through a guaranteed 3Ω to 8.5Ω internal resistor. This ensures rapid discharge of external C2 and prevents floating negative rails. Wake-up time from shutdown is ≤100µs when sourcing 15mA, enabling responsive power cycling in duty-cycled automotive subsystems.

Is the MAX16945TGUT/V+T pin-compatible with other members of the MAX1694x family?

No - the MAX16945TGUT/V+T is not pin-compatible with other MAX1694x variants such as MAX16946 or MAX16947. While all share the 6-pin SOT23 package, pin functions differ: MAX16945 uses C1+ and C1− for flying capacitor terminals, whereas MAX16946 implements a different topology with C1 and C2 assigned to alternate pins. Substituting without verifying pin mapping will result in functional failure or damage.

What is the significance of the "/V+" suffix in MAX16945TGUT/V+T?

The "/V+" suffix in MAX16945TGUT/V+T indicates dual qualification: "/V" denotes AEC-Q100 Grade 2 automotive qualification (-40°C to +105°C), and "+" signifies RoHS-compliant, lead(Pb)-free packaging per JEDEC standards. The "T" denotes tape-and-reel packaging, and "GUT" specifies the 6-pin SOT23 (U6F+6) package code. Together, MAX16945TGUT/V+T confirms full automotive reliability, environmental compliance, and standard surface-mount assembly readiness.