Texas Instruments TLV743285PDBVR

Overview

TLV743285PDBVR from Texas Instruments is a 300-mA, low-dropout linear regulator (LDO) with fixed 2.85 V output, 125 mV dropout at 300 mA, ±1.4% output accuracy over –40°C to +125°C, and 34 µA quiescent current. It operates from 1.4 V to 5.5 V input and supports stable regulation with only a 1-µF ceramic output capacitor - ideal for space-constrained portable power rails in camera modules and smartphone subsystems.

For engineers reviewing the TLV743285PDBVR datasheet, TLV743285PDBVR pinout, TLV743285PDBVR application, or TLV743285PDBVR equivalent, key selection criteria include ultra-low IQ for battery longevity, active output discharge for fast rail shutdown, foldback current limiting for short-circuit robustness, and SOT-23-5 package compatibility with high-density PCB layouts.

Technical Context

The TLV743285PDBVR implements a PMOS pass transistor architecture enabling low dropout and inherent reverse-current blocking. Its internal bandgap reference and error amplifier deliver tight DC accuracy and fast load transient response (<100 µs settling for 50–300 mA step), while undervoltage lockout (UVLO) ensures clean startup above 1.3 V input.

Functional modes include normal regulation, dropout (VIN < VOUT + VDO), and disabled state with 120-Ω active pulldown. Thermal shutdown triggers at 160°C and resets at 140°C, and foldback current limiting reduces output current as VOUT collapses - protecting during sustained shorts without latch-up.

Key Specifications

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body, exposed thermal pad electrically tied to GND; requires minimum 2-layer PCB with GND plane connection for thermal performance (RθJB = 55.8°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO applications.

Compared with TLV743285PDBVR, TLC760285DBVR trades protection features for lower cost, while TPS7A20285PDQNR improves IQ but sacrifices reverse-current blocking - making TLV743285PDBVR the balanced choice for compact, battery-powered systems needing integrated safety and efficiency.

Availability

TLV743285PDBVR is available at Aetrix Electronics and suitable for smartphone camera modules, wearable sensor hubs, industrial handheld scanners, and USB-C peripheral power rails requiring stable component supply and long-term production continuity.

Supply support for TLV743285PDBVR 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 and embedded processing technologies, with decades of LDO design expertise and broad automotive, industrial, and consumer qualification.

The TLV743P family delivers ultra-low-IQ, small-footprint LDOs optimized for battery-powered portable electronics - emphasizing minimal board area, fast transient response, and integrated protection for reliable subsystem power management.

FAQ

What is the maximum input voltage rating for TLV743285PDBVR?

The absolute maximum input voltage for TLV743285PDBVR is 6 V, but recommended operating range is 1.4 V to 5.5 V. Exceeding 6 V risks permanent damage per Absolute Maximum Ratings. For reliable 2.85 V output, VIN must stay ≥2.975 V (2.85 V + 125 mV dropout) under 300 mA load - TLV743285PDBVR remains functional up to 5.5 V input with proper thermal design.

Does TLV743285PDBVR require an external pull-up resistor on the EN pin?

No, TLV743285PDBVR has no internal pull-up or pull-down on the EN pin. If enable functionality is unused, connect EN directly to IN to ensure always-on operation. Adding an external pull-up is unnecessary and may interfere with controlled shutdown sequencing - TLV743285PDBVR relies on driven logic levels (≥0.9 V to enable, ≤0.35 V to disable).

Can TLV743285PDBVR safely drive a 10-µF ceramic output capacitor?

Yes, TLV743285PDBVR is stable with output capacitors from 1 µF to 100 µF, including X7R/X5R ceramics. The 1-µF minimum ensures phase margin >60° across temperature and load; larger values improve transient response and reduce output ripple. No series resistance or special dielectric is required - TLV743285PDBVR's compensation is internal and optimized for ceramic-only designs.

What is the thermal shutdown behavior of TLV743285PDBVR?

TLV743285PDBVR enters thermal shutdown at ~160°C junction temperature and re-enables at ~140°C. During shutdown, the output is actively pulled to GND via a 120-Ω resistor. This hysteresis prevents oscillation near trip point. Under sustained overload, TLV743285PDBVR cycles between regulation and shutdown - design must limit average power dissipation to keep TJ ≤125°C for reliability.

Is TLV743285PDBVR compatible with lead-free reflow profiles?

Yes, TLV743285PDBVR in SOT-23-5 (DBV) package is rated for standard IPC/JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C for 30 seconds. The device meets RoHS and REACH requirements, and its moisture sensitivity level (MSL) is 1 - unlimited floor life at ≤30°C/85% RH. No pre-bake is required before assembly.