Texas Instruments TLV704345DBVR

Overview

TLV704345DBVR from Texas Instruments is a fixed-output 3.45-V, 150-mA low-dropout linear regulator with 3.4-μA quiescent current, stable with ≥0.47-μF output capacitance, and rated for –40°C to +125°C junction temperature. It delivers ultra-low IQ across full load range (0–150 mA) and supports input voltages from 2.5 V to 24 V - ideal for battery-powered microcontroller power rails in space-constrained industrial sensors.

For engineers reviewing the TLV704345DBVR datasheet, TLV704345DBVR pinout, TLV704345DBVR application, or TLV704345DBVR equivalent, key selection criteria include dropout voltage at 100 mA (850 mV typ), ground current stability over temperature, soft-start behavior, overcurrent protection threshold (160–500 mA), and SOT-23-5 package thermal resistance (R_θJA = 170.8°C/W for new chip).

Technical Context

The TLV704345DBVR employs a CMOS pass transistor with R_DS(ON) ≈ 8.5 Ω (calculated from 850 mV / 100 mA), enabling low dropout while maintaining regulation down to V_IN = V_OUT + V_DO. Its leakage null control circuit activates below 5 μA load, ensuring consistent 3.4-μA IQ across –40°C to +125°C when I_OUT ≤ 100 mA.

Internal soft-start limits inrush current into the output capacitor, and brick-wall overcurrent protection engages at 160 mA (min) to safeguard against short-circuit faults. The device operates in normal regulation, dropout, or disabled modes - with dropout mode exhibiting degraded transient response due to triode-region pass transistor operation.

Key Specifications

Pinout & Package

TLV704345DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts and automated assembly. Thermal performance is characterized by R_θJA = 170.8°C/W (new chip) and R_θJB = 76.7°C/W, supporting continuous 150-mA operation with minimal board-level copper.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV704345DBVR, TLV707345DCKR trades overcurrent protection and wide-input capability for smaller size, while MCP1703T-345E/MB sacrifices input voltage headroom for marginally lower IQ - making TLV704345DBVR the sole choice for ruggedized, wide-input, fault-tolerant 3.45-V regulation.

Availability

TLV704345DBVR is available at Aetrix Electronics and suitable for home automation sensors, retail payment terminals, and grid infrastructure meters requiring stable component supply with long-term lifecycle assurance and traceable sourcing.

Supply support for TLV704345DBVR 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The TLV704 product line was designed specifically for ultra-low-power, wide-input-voltage LDO applications in battery-operated and energy-harvesting systems - emphasizing quiescent current consistency, thermal robustness, and ease of layout.

FAQ

What is the maximum input voltage rating for TLV704345DBVR?

The TLV704345DBVR has an absolute maximum input voltage of 30 V for the new chip revision, with recommended operating range up to 24 V. This 30-V rating provides margin against transients in industrial 24-V systems and enables compatibility with unconditioned solar panel inputs. Always verify the chip revision using TI's date code or orderable part marking, as legacy chips are limited to 24 V max.

Does TLV704345DBVR require an input capacitor?

TLV704345DBVR does not require an input capacitor for stability, but TI recommends a 0.047-μF ceramic capacitor from IN to GND to mitigate ringing caused by source inductance during load transients. This capacitor improves system-level immunity without impacting LDO loop dynamics. For noisy input sources like switching converters, a larger 0.1-μF or 1-μF capacitor further reduces high-frequency coupling into the regulator.

How does the soft-start function operate in TLV704345DBVR?

The TLV704345DBVR integrates internal soft-start that controls the rate of output voltage ramp-up during power-on, limiting inrush current into the output capacitor. This prevents large current spikes that could cause input rail collapse or trigger upstream current-limit events. Soft-start duration is fixed and not user-adjustable; it ensures monotonic V_OUT rise with no overshoot under typical 1-μF C_OUT conditions, as verified in Figure 6-24 of the datasheet.

Can TLV704345DBVR be used in automotive applications?

Yes, TLV704345DBVR is qualified for automotive use with its –40°C to +125°C operating junction temperature range and robust thermal metrics (R_θJA = 170.8°C/W). It meets AEC-Q100 stress test requirements for temperature cycling, HTOL, and ESD. However, it is not AEC-Q100 certified as a standalone part - system-level qualification is required. Use cases include body control modules, infotainment power sequencing, and ADAS sensor sub-rails where 3.45-V precision is needed.

What is the minimum output capacitance required for TLV704345DBVR stability?

TLV704345DBVR requires a nominal output capacitance of ≥1 μF (ceramic), which must maintain ≥0.47 μF effective value after derating for DC bias and temperature effects. TI specifies this minimum to ensure phase margin >45° across all operating conditions. Using a 1-μF 0402 X7R capacitor with 20% voltage coefficient yields ~0.8 μF effective at 3.45 V - well above the 0.47-μF threshold and compatible with space-constrained designs.