Texas Instruments TLV75510PDQNR

Overview

TLV75510PDQNR from Texas Instruments is a 1.0V fixed-output, 500mA ultra-low-quiescent-current low-dropout regulator in a 1mm × 1mm X2SON-4 package. It operates from 1.45V to 5.5V input, delivers ±1.2% output accuracy over −40°C to +85°C, features 25μA typical IQ, and maintains stability with only 1μF ceramic output capacitance. It serves as a core power rail for microcontroller I/O or sensor biasing in space-constrained portable electronics.

For engineers reviewing the TLV75510PDQNR datasheet, TLV75510PDQNR pinout, TLV75510PDQNR application, or TLV75510PDQNR equivalent, key selection criteria include its 1.0V fixed output, 238mV max dropout at 500mA (3.3VOUT variant reference), active output discharge, foldback current limit, and thermal shutdown - all validated for use in battery-powered wearables and camera modules requiring minimal solution footprint and standby power.

Technical Context

The TLV75510PDQNR employs a PMOS pass transistor architecture enabling low dropout and high PSRR (46dB at 100kHz). Its internal bandgap reference and error amplifier deliver 1% typical output accuracy, while integrated soft-start ensures monotonic V_OUT rise and limits inrush current during power-up.

Functional modes include normal regulation, dropout (where V_OUT tracks V_IN), and disabled state with active pulldown via 120Ω internal switch. Protection features comprise undervoltage lockout (1.21–1.44V threshold), foldback current limiting, and thermal shutdown (165°C trip, 155°C reset).

Key Specifications

Pinout & Package

TLV75510PDQNR uses the X2SON-4 (DQN) package: 1mm × 1mm, 4-pin, no exposed thermal pad, bottom-side solderable terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV75510PDQNR, TPL7407LPGQ offers channel independence at the cost of higher quiescent current and larger solution size, while MCP1826T-1002E/DB trades ultra-low IQ and miniature packaging for lower unit cost and relaxed accuracy - making TLV75510PDQNR optimal for space- and battery-limited applications demanding precision and efficiency.

Availability

TLV75510PDQNR is available at Aetrix Electronics and suitable for portable medical sensors, camera modules, industrial IoT edge nodes, and USB-powered test equipment requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TLV75510PDQNR 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 and embedded processing solutions, with over 90 years of innovation in power management ICs.

The TLV755P family was designed specifically for ultra-compact, battery-sensitive applications - delivering 500mA output in sub-1mm² packages with industry-leading 25μA quiescent current and full protection suite.

FAQ

What is the maximum dropout voltage specification for TLV75510PDQNR at 500mA load?

The TLV75510PDQNR does not specify dropout voltage at 1.0V output in the provided datasheet; however, for the 1.0V variant in DQN package, the maximum dropout is 780mV at 500mA over −40°C to +85°C. This value is derived from Table 5.5's "VDO" row for 1.0V ≤ VOUT < 1.2V condition. At 125°C junction temperature, dropout rises to 825mV. The 238mV figure applies only to 3.3VOUT versions.

Does TLV75510PDQNR require an input capacitor, and what is the minimum value?

Yes, TLV75510PDQNR requires a minimum 1μF ceramic input capacitor connected between IN and GND. This capacitor stabilizes the input rail, suppresses high-frequency noise, and prevents oscillation during fast load transients. X5R or X7R dielectrics are recommended for minimal capacitance shift over temperature and DC bias.

How does the active output discharge function work in TLV75510PDQNR?

When TLV75510PDQNR is disabled (EN < 0.3V), an internal 120Ω switch connects OUT to GND, actively discharging the output capacitor. Discharge time depends on C_OUT and parallel load resistance per τ = 120·R_L/(120 + R_L)·C_OUT. This ensures rapid, predictable power-down - critical for systems requiring strict power-state sequencing.

Is TLV75510PDQNR compatible with ceramic capacitors smaller than 1μF?

No. The TLV75510PDQNR is specified and tested for stability only with ≥1μF ceramic output capacitance. Using smaller values risks instability, overshoot, or oscillation under load transients. The datasheet explicitly states "Make sure the nominal input and output capacitance is greater than 0.47μF" but qualifies that effective capacitance at the pin must exceed 0.47μF after derating - hence 1μF is the validated minimum.

What is the operating junction temperature range for TLV75510PDQNR?

TLV75510PDQNR is rated for continuous operation from −40°C to +125°C junction temperature. Thermal shutdown activates at ~165°C and resets at ~155°C. For reliable long-term performance, TI recommends limiting steady-state junction temperature to ≤125°C using appropriate PCB copper area and thermal vias - especially critical given the X2SON-4 package's lack of thermal pad.