Texas Instruments TLV70243DSER

Overview

TLV70243DSER from Texas Instruments is a 4.3 V fixed-output, 300-mA low-dropout (LDO) linear regulator in a 6-pin WSON package, featuring 2% output accuracy, 35 μA quiescent current, 260 mV dropout at 300 mA, and 68 dB PSRR at 1 kHz - designed for Li-ion–powered handheld devices requiring stable, low-noise biasing of RF and digital subsystems.

For engineers reviewing the TLV70243DSER datasheet, TLV70243DSER pinout, TLV70243DSER application, or TLV70243DSER equivalent, key selection criteria include dropout voltage under full load, thermal performance in space-constrained layouts, enable threshold compatibility with 1.8-V logic, stability with 0.1-μF ceramic output capacitance, and shutdown current below 1 μA.

Technical Context

The TLV70243DSER uses a PMOS pass transistor to achieve low dropout and maintains regulation down to 260 mV headroom at 300 mA. Its precision bandgap reference and error amplifier deliver ±2% DC accuracy across –40°C to +125°C junction temperature.

It integrates thermal shutdown (165°C trip), current limit (~320–860 mA), undervoltage lockout (1.9 V), and active-high enable with 0.9 V turn-on/0.4 V turn-off thresholds. Unlike the TLV702P variant, TLV70243DSER does not include internal active pulldown circuitry.

Key Specifications

Pinout & Package

TLV70243DSER is housed in a 1.5 mm × 1.5 mm, 6-pin WSON (DSE) package with wettable flanks, optimized for automated optical inspection and thermal performance on 2-layer PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F0TESA1 and MCP1703T-4302E/MB, TLV70243DSER offers optimal balance of 300-mA capability, 35-μA IQ, WSON thermal performance, and enable functionality - making it preferred for portable, battery-powered designs where board area, efficiency, and controllability are jointly critical.

Availability

TLV70243DSER is available at Aetrix Electronics and suitable for wireless handsets, Bluetooth® audio modules, and ZigBee® sensor nodes requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.

Supply support for TLV70243DSER 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 specializing in analog and embedded processing technologies, with leadership in power management ICs and broad industrial, automotive, and consumer design support infrastructure.

The TLV702 series was developed specifically for battery-powered portable electronics, emphasizing ultra-low quiescent current, small-package thermal efficiency, and robust transient response in space- and energy-constrained applications.

FAQ

What is the minimum input voltage required for TLV70243DSER to maintain regulation at full 300-mA load?

The TLV70243DSER requires VIN ≥ VOUT + VDO = 4.3 V + 0.26 V = 4.56 V to sustain regulation at 300 mA. Below this, the device enters dropout mode where output tracks input minus dropout voltage. This value is confirmed in Section 6.5 Electrical Characteristics of the SLVSAG6D datasheet under VDO test conditions.

Does TLV70243DSER include an internal active pulldown circuit for output discharge during shutdown?

No, TLV70243DSER does not include internal active pulldown. Only the TLV702P-series variants (e.g., TLV70243P) integrate a 120-Ω discharge path. TLV70243DSER relies on external circuitry or load leakage for output discharge - confirmed in Section 7.3.2 and Pin Functions table of the datasheet.

What is the maximum allowable output capacitance for TLV70243DSER, and does it affect stability?

TLV70243DSER has no upper limit on output capacitance and remains stable with values up to at least 100 μF, per TI's application guidance. Stability is guaranteed for ≥0.1 μF ceramic; larger capacitors improve transient response but increase start-up time - verified in Section 8.2.2.1 and Figure 15–18 load transient plots.

Can TLV70243DSER operate with a 1.8-V enable signal, and what is its enable current draw?

Yes, TLV70243DSER supports 1.8-V enable signals: its EN pin turns on at ≥0.9 V (min), well within 1.8-V logic high range. Enable pin current is ≤0.04 μA at 5.5 V, ensuring negligible loading on GPIOs - specified in Section 6.5 Electrical Characteristics under IEN parameter.

Is TLV70243DSER compatible with 0402-size 0.1-μF X5R ceramic capacitors for both input and output?

Yes, TLV70243DSER is explicitly characterized for stability with ≥0.1 μF effective output capacitance, and 0402 X5R ceramics meet this requirement when derated for bias and temperature. Input capacitance of 0.1–1 μF is recommended for transient suppression - detailed in Section 8.2.2.1 and Figure 25 typical application circuit.