Texas Instruments TLV704345DBVT

Overview

TLV704345DBVT from Texas Instruments is a 3.45-V fixed-output, 150-mA, low-dropout linear regulator with 3.4 μA typical quiescent current, stable over –40°C to +125°C junction temperature and compatible with ≥0.47 μF output capacitance. It operates from 2.5 V to 24 V input and delivers regulated power to ultra-low-power microcontrollers in battery-backed industrial sensors.

For engineers reviewing the TLV704345DBVT datasheet, TLV704345DBVT pinout, TLV704345DBVT application, or TLV704345DBVT equivalent, key selection criteria include dropout voltage at 100 mA (850 mV typ), ground current stability across 0–150 mA load, thermal performance in SOT-23-5 (R_θJA = 170.8°C/W), and compatibility with ceramic output capacitors down to 0.47 μF.

Technical Context

The TLV704345DBVT uses a CMOS pass transistor with R_DS(ON) ≈ 8.5 Ω (calculated from 850 mV / 100 mA), enabling low dropout operation across its full 150-mA load range. Its leakage null control circuit maintains 3.4 μA quiescent current even at high input voltages (>18 V) and elevated temperatures (>100°C), ensuring consistent battery life in always-on monitoring systems.

Internal soft-start limits inrush current during power-up, while brick-wall overcurrent protection activates at 160–500 mA (new chip), safeguarding against sustained short-circuit faults without thermal shutdown dependency. The device operates in normal regulation when V_IN > V_OUT + V_DO, and transitions to dropout mode-where V_OUT tracks V_IN-when input falls below that threshold.

Key Specifications

Pinout & Package

TLV704345DBVT is housed in a 2.90 mm × 1.60 mm, 5-pin SOT-23 (DBV) package with exposed pad for enhanced thermal dissipation. Pin 1 is GND, Pin 2 is IN, Pin 3 is OUT, Pins 4 and 5 are NC (not internally connected).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESK and MCP1703T-3302E/MB, TLV704345DBVT uniquely balances 3.45-V precision output, 24-V input tolerance, and sub-4-μA quiescent current in a standard SOT-23-5 package-making it optimal for industrial and medical battery systems requiring exact voltage matching and long service life.

Availability

TLV704345DBVT is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, medical wearables, home automation hubs, and grid infrastructure applications requiring stable component supply across extended product lifecycles.

Supply support for TLV704345DBVT 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The TLV704 family was designed specifically for ultra-low-power, wide-input-voltage battery management in space-constrained IoT endpoints-emphasizing quiescent current optimization, thermal resilience, and minimal external component count.

FAQ

What is the maximum input voltage rating for TLV704345DBVT?

The TLV704345DBVT has an absolute maximum input voltage of 30 V for the new chip revision, as confirmed in Section 6.1 of the SBVS148F datasheet. This rating applies only to devices marked as "new chip" per TI's March 2023 revision; legacy units are rated to 24 V. Always verify marking or date code to confirm revision before designing for 24–30 V operation. TLV704345DBVT must never be operated above 30 V to prevent permanent damage.

Does TLV704345DBVT require an input capacitor?

An input capacitor is not required for TLV704345DBVT stability, but TI recommends a 0.047 μF ceramic capacitor from IN to GND to suppress high-frequency noise and mitigate ringing caused by source inductance during load transients. This recommendation appears in Section 6.3 of the SBVS148F datasheet and is especially critical in systems with long traces or high-impedance sources. TLV704345DBVT remains functional without it, but transient immunity improves significantly with the recommended cap.

What is the minimum output capacitance required for stable operation of TLV704345DBVT?

TLV704345DBVT requires a minimum effective output capacitance of 0.47 μF, as stated in Sections 1, 3, and 6.3 of the SBVS148F datasheet. This value accounts for 50% derating of nominal capacitor values due to DC bias and temperature effects. A 1 μF X7R ceramic capacitor is recommended to ensure margin. Using less than 0.47 μF effective capacitance risks oscillation and poor load transient response. TLV704345DBVT does not support zero-ESR or polymer capacitors exclusively-ceramic is preferred.

How does the soft-start function operate in TLV704345DBVT?

TLV704345DBVT incorporates internal soft-start that controls the slew rate of the output voltage during power-up, limiting inrush current into the output capacitor and preventing voltage overshoot or rail collapse on shared supplies. This feature is active at every power-on event and requires no external components. As described in Section 3 and Figure 6-24 of SBVS148F, soft-start ensures monotonic V_OUT rise with ~2-ms typical delay, protecting downstream circuits like ADC references and RF synthesizers. TLV704345DBVT does not offer adjustable soft-start timing.

Is TLV704345DBVT pin-compatible with other TLV704 variants?

Yes, all TLV704 fixed-output variants-including TLV704345DBVT-share identical 5-pin SOT-23 (DBV) packaging and pinout (GND–IN–OUT–NC–NC), as confirmed in Section 5 (Pin Configuration) of SBVS148F. This allows drop-in replacement across output voltages (1.8 V to 5 V) without PCB redesign. However, output voltage tolerance, dropout behavior, and thermal performance vary slightly between versions; always validate loop stability and thermal rise for the specific variant. TLV704345DBVT maintains full mechanical and electrical compatibility within the family.