Texas Instruments TLV70450DBVRM3

Overview

TLV70450DBVRM3 from Texas Instruments is a fixed 5.0-V, 150-mA low-dropout linear regulator with 3.4-μA typical quiescent current, 850-mV dropout at 100 mA, and stable operation with ≥0.47-μF output capacitance. It operates across –40°C to +125°C and supports input voltages from 2.5 V to 24 V, making it suitable for battery-powered microcontroller power rails in industrial sensing nodes.

For engineers reviewing the TLV70450DBVRM3 datasheet, TLV70450DBVRM3 pinout, TLV70450DBVRM3 application, or TLV70450DBVRM3 equivalent, key selection criteria include ultra-low IQ over full load range (0–150 mA), thermal performance in SOT-23-5 (RθJA = 170.8°C/W), dropout behavior under light/heavy loads, and compatibility with ceramic output capacitors down to 0.47 μF.

Technical Context

The TLV70450DBVRM3 implements a CMOS-based LDO architecture with internal bandgap reference, leakage-null control circuit active below 5-μA load, and brick-wall overcurrent protection. Its pass transistor RDS(ON) is derived from VDO = 850 mV at 100 mA, yielding ~8.5 Ω typical on-resistance.

It features internal soft-start to limit inrush current into the output capacitor and operates in three functional modes-normal regulation, dropout (VIN < VOUT + VDO), and disabled-each defined by precise VIN, IOUT, and TJ boundaries per TI's device functional mode table.

Key Specifications

Pinout & Package

TLV70450DBVRM3 is housed in a 2.90-mm × 1.60-mm 5-pin SOT-23 (DBV) package with exposed pad for thermal enhancement. Pin 1 is GND, Pin 2 is IN, Pin 3 is OUT, Pins 4 and 5 are NC (not internally connected; may be left open or tied to GND for improved thermal performance).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS70950DBVR and MCP1703T-5002E/MB, TLV70450DBVRM3 uniquely combines 2.5-V start-up capability, 3.4-μA IQ across full load range, and 125°C junction rating-making it optimal for long-life, wide-input, high-reliability embedded systems.

Availability

TLV70450DBVRM3 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart metering modules, medical wearable patches, and building automation controllers requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for TLV70450DBVRM3 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 delivering analog and embedded processing solutions, with leadership in power management ICs and precision analog components.

The TLV704 product line is designed specifically for ultra-low-power, wide-input-voltage LDO applications in battery-operated and energy-constrained systems-emphasizing quiescent current optimization, thermal resilience, and ease of integration in space-constrained PCBs.

FAQ

What is the minimum input voltage required for TLV70450DBVRM3 to regulate 5.0 V output?

The TLV70450DBVRM3 requires VIN ≥ VOUT + VDO. With a typical dropout voltage of 850 mV at 100 mA, the minimum input is 5.85 V under that load. At lighter loads, dropout decreases-e.g., 75 mV at 10 mA-so regulation begins at 5.075 V. The absolute minimum specified VIN is 2.5 V, but regulation only occurs once VIN exceeds VOUT + actual VDO for the given load and temperature.

Does TLV70450DBVRM3 require an input capacitor, and if so, what value is recommended?

While not required for stability, TLV70450DBVRM3 recommends a 0.047-μF ceramic input capacitor from IN to GND to counteract source inductance and prevent ringing during load transients. This is especially critical in systems with long PCB traces or high-impedance sources like batteries with protection circuits.

Can TLV70450DBVRM3 operate with a 0.47-μF output capacitor, or is 1 μF mandatory?

TLV70450DBVRM3 is stable with ≥0.47 μF effective output capacitance. The datasheet specifies "1 μF" as the nominal value assuming 50% derating-so a 1-μF X7R ceramic (guaranteeing ≥0.5 μF at bias/temperature) meets the requirement. A 0.47-μF part may fall below threshold under voltage/temperature stress and is not recommended.

How does the leakage-null control circuit in TLV70450DBVRM3 affect ground current at light loads?

The leakage-null control circuit activates only when output load is below ~5 μA, VIN > 18 V, and die temperature exceeds 100°C. Under normal light-load conditions (e.g., 10–100 μA), TLV70450DBVRM3 maintains its 3.4-μA typical ground current-unlike legacy regulators whose IQ rises sharply near zero load.

Is TLV70450DBVRM3 pin-compatible with earlier TLV704 variants such as TLV70450DBVT?

Yes-TLV70450DBVRM3 uses the same DBV (SOT-23-5) package and identical pinout (GND–IN–OUT–NC–NC) as TLV70450DBVT. Both share identical footprint, solder mask, and thermal pad layout, enabling drop-in replacement without PCB revision.