Texas Instruments TLV1805DBVR

Overview

TLV1805DBVR from Texas Instruments is a 40V rail-to-rail input, push-pull output high-voltage comparator with shutdown, operating from 3.3 V to 40 V supply, delivering 135 µA quiescent current, 250 ns propagation delay, 14 mV built-in hysteresis, and ±500 µV input offset voltage. It serves as a smart diode controller in reverse current protection circuits driving N- or P-channel MOSFET gates.

For engineers reviewing the TLV1805DBVR datasheet, TLV1805DBVR pinout, TLV1805DBVR application, or TLV1805DBVR equivalent, key selection considerations include its high peak output current (±100 mA), rail-to-rail input stage with phase reversal protection, shutdown-enabled high-Z output, Power-On Reset behavior, and SOT-23-6 package compatibility for space-constrained industrial power monitoring designs.

Technical Context

The TLV1805DBVR integrates a CMOS input stage with full rail-to-rail common-mode range (V– – 0.2 V to V+ + 0.2 V) and phase inversion protection, enabling accurate sensing near supply rails. Its push-pull output delivers ±100 mA peak sourcing/sinking current, allowing direct drive of MOSFET gates without external buffers.

Shutdown is active-high (VIH ≥ 1.35 V referenced to V–), reducing quiescent current to 9.5–13 µA while placing the output in high-impedance state. Power-On Reset holds output in Hi-Z until supply exceeds 3.3 V for ≥20 µs, preventing false triggering during power ramp-up.

Key Specifications

Pinout & Package

SOT-23-6 package (1.60 mm × 2.90 mm body size), surface-mount, thermally enhanced for industrial ambient operation up to +125°C.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage comparator applications.

Compared with LM393BDR and TLV3701DBVR, the TLV1805DBVR uniquely combines 40 V operation, ±100 mA push-pull drive, integrated shutdown, and rail-to-rail inputs - making it the only option among the three that supports robust, space-efficient smart diode control in industrial power domains.

Availability

TLV1805DBVR is available at Aetrix Electronics and suitable for reverse current protection, overvoltage detection, and OR-ing MOSFET control applications requiring stable component supply across extended temperature and high-voltage operating conditions.

Supply support for TLV1805DBVR 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies for industrial, automotive, and communications markets.

The TLV1805DBVR belongs to TI's high-voltage precision comparator product line, engineered specifically for robust power system monitoring and protection - including smart diode control, OR-ing, and fault detection in demanding 12–40 V industrial and transportation systems.

FAQ

What is the maximum supply voltage rating for TLV1805DBVR?

The TLV1805DBVR has an absolute maximum supply voltage (V+ to V–) of 42 V, with recommended operation up to 40 V. This allows safe use in 24 V and 36 V industrial systems, and accommodates transients per IEC 61000-4-5 without derating. Operation beyond 40 V risks exceeding absolute maximum ratings and invalidating reliability guarantees.

Does TLV1805DBVR support dual-supply operation?

Yes, TLV1805DBVR supports true dual-supply operation with V+ and V– pins, enabling configurations such as ±15 V or ±20 V. Its rail-to-rail inputs function from (V–) – 0.2 V to (V+) + 0.2 V, and the shutdown pin is referenced to V–, making it compatible with split-rail designs used in precision instrumentation and motor control feedback paths.

How does the Power-On Reset (POR) function in TLV1805DBVR?

The TLV1805DBVR POR holds the output in high-impedance state until the supply voltage exceeds 3.3 V and remains stable for at least 20 µs. This prevents false outputs during power ramp-up. Once enabled, the comparator responds normally to input signals. The POR threshold is temperature-stable (2.2–2.8 V typical), ensuring consistent behavior across –40°C to +125°C.

Can TLV1805DBVR drive MOSFET gates directly without external components?

Yes, TLV1805DBVR can directly drive N- or P-channel MOSFET gates due to its ±100 mA peak push-pull output current and rail-to-rail swing. For example, it fully turns on a 10 nC gate charge MOSFET in <100 ns. Thermal limits must be observed: at 40 V supply and 100 mA continuous, power dissipation exceeds SOT-23-6 limits - so gate drive must remain pulsed or short-duration per Figure 22 derating curve.

What is the input hysteresis value of TLV1805DBVR and is it adjustable?

The TLV1805DBVR features a fixed 14 mV internal hysteresis, optimized for noise immunity in high-voltage power monitoring. It is not adjustable via external components - unlike comparators requiring resistor feedback networks. This simplifies design for overvoltage/undervoltage detection while guaranteeing consistent hysteresis across temperature (±1 mV variation from –40°C to +125°C) and supply voltage (13–15 mV from 3.3 V to 40 V).