Analog Devices Inc. LTC1693-5CMS8#PBF

Overview

LTC1693-5CMS8#PBF from Analog Devices (formerly Linear Technology) is a high-speed single P-channel MOSFET driver in an 8-lead MSOP package, delivering 1.5A peak output current with 16ns rise/fall times at V_CC = 12V and C_L = 1nF. It features V_CC-independent CMOS input thresholds (VIH = 2.6V, VIL = 1.4V), 1.2V hysteresis, undervoltage lockout (UVLO), and thermal shutdown - enabling robust gate driving in high-side switch applications such as Li-ion battery chargers and motor control.

For engineers reviewing the LTC1693-5CMS8#PBF datasheet, LTC1693-5CMS8#PBF pinout, LTC1693-5CMS8#PBF application, or LTC1693-5CMS8#PBF equivalent, key selection criteria include output polarity select (PHASE pin), rail-to-rail drive capability, low quiescent current (360µA), wide V_CC range (4.5V–13.2V), and thermal/UVLO protection for reliable high-side P-MOSFET switching in power supplies and battery management systems.

Technical Context

The LTC1693-5CMS8#PBF implements a dual-MOSFET CMOS inverter output stage (P1/N1) with adaptive nonoverlapping 6ns dead time to minimize cross-conduction. Its input stage uses an internal 4V regulator to decouple VIH/VIL thresholds from V_CC variation, ensuring stable 3V/5V logic compatibility.

UVLO activates below 4V (output pulled to V_CC), and thermal shutdown engages at T_J = 145°C with 20°C hysteresis. The PHASE pin selects inverting (grounded) or noninverting (V_CC/floating) operation, enabling flexible gate control topology without external logic inversion.

Key Specifications

Pinout & Package

Package: 8-lead MSOP (MS8), 3.0mm × 3.0mm body, 0.65mm pitch, θ_JA = 200°C/W.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar P-channel MOSFET driver applications.

Compared with TPS28225DR and LM5113SDX/NOPB, the LTC1693-5CMS8#PBF uniquely combines PHASE-selectable polarity, V_CC-independent thresholds, and integrated thermal/UVLO protection - making it optimal for space-constrained, fault-tolerant P-MOSFET high-side switching where logic flexibility and reliability are critical.

Availability

LTC1693-5CMS8#PBF is available at Aetrix Electronics and suitable for power supplies, Li-ion battery chargers, motor/relay control, and industrial line drivers requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for LTC1693-5CMS8#PBF 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

Analog Devices acquired Linear Technology in 2017 and maintains its precision analog and power management portfolio with rigorous qualification and long-term product support.

The LTC1693-5CMS8#PBF belongs to Linear's high-speed MOSFET driver family, designed specifically for efficient, reliable high-side P-channel switching in battery-powered and industrial power systems where low quiescent current and fault protection are essential.

FAQ

What is the function of the PHASE pin on the LTC1693-5CMS8#PBF?

The PHASE pin on the LTC1693-5CMS8#PBF selects output polarity: grounding it enables inverting operation (OUT = NOT IN), while connecting it to V_CC or leaving it floating enables noninverting operation (OUT = IN). This eliminates the need for external inverters in designs requiring either logic relationship, and the typical pull-up current is 20µA when PHASE is grounded. The LTC1693-5CMS8#PBF thus supports two distinct gate-drive configurations using a single part.

Does the LTC1693-5CMS8#PBF support 3.3V logic inputs?

Yes, the LTC1693-5CMS8#PBF supports 3.3V logic inputs directly: its VIH is 2.6V (min) and VIL is 1.4V (max) at 25°C, with 1.2V hysteresis - ensuring robust recognition of 3.3V CMOS levels. Input thresholds are regulated internally and independent of V_CC, so performance remains consistent even if V_CC varies between 4.5V and 13.2V. The LTC1693-5CMS8#PBF draws less than 10µA input bias current, minimizing loading on the driving source.

What protection features does the LTC1693-5CMS8#PBF include?

The LTC1693-5CMS8#PBF integrates undervoltage lockout (UVLO) that disables the driver and pulls OUT to V_CC when V_CC falls below 4V, and thermal shutdown that activates at 145°C junction temperature with 20°C hysteresis. Both features disable the input buffer and force safe output states to prevent MOSFET misfiring or destruction. These protections are intrinsic to the LTC1693-5CMS8#PBF die and require no external components.

Can the LTC1693-5CMS8#PBF drive N-channel MOSFETs?

No, the LTC1693-5CMS8#PBF is optimized for high-side P-channel MOSFETs: its output stage is configured as a CMOS inverter referenced to V_CC, and OUT swings rail-to-rail between GND and V_CC. Driving an N-channel MOSFET in high-side configuration would require bootstrapping or isolated supply - which the LTC1693-5CMS8#PBF does not provide. For N-MOSFETs, Linear's LTC1693-1/LTC1693-2 or Analog Devices' LM5113 are appropriate alternatives.

What is the recommended V_CC bypassing scheme for the LTC1693-5CMS8#PBF?

The LTC1693-5CMS8#PBF requires a 0.1µF ceramic capacitor placed directly between V_CC and GND pins, plus a parallel 4.7µF low-ESR capacitor - both mounted as close as possible to minimize lead inductance. The GND connection must be a low-impedance star point shared only with the bypass caps and load return path. This layout prevents ringing and overshoot caused by 1.5A peak switching currents. The LTC1693-5CMS8#PBF datasheet specifies this dual-capacitor approach to maintain signal integrity at nanosecond edge rates.