Texas Instruments TLV75507PDQNR

Overview

TLV75507PDQNR from Texas Instruments is a 500mA, low-quiescent-current (25μA typical), fixed 0.7V output LDO regulator in X2SON-4 package. It operates from 1.45V to 5.5V input, delivers ±1.2% output accuracy over temperature, and maintains stability with only 1µF ceramic output capacitance - enabling compact power delivery for ultra-low-voltage microcontroller cores.

For engineers reviewing the TLV75507PDQNR datasheet, TLV75507PDQNR pinout, TLV75507PDQNR application, or TLV75507PDQNR equivalent, key selection criteria include its 0.7V fixed output, 238mV max dropout at 500mA (3.3VOUT), active output discharge, foldback current limit, and thermal shutdown - all critical for battery-powered and space-constrained embedded systems.

Technical Context

The TLV75507PDQNR uses a PMOS pass transistor architecture enabling low dropout and high PSRR (46dB at 100kHz). Its internal soft-start ensures monotonic VOUT rise and limits inrush current during power-up, while undervoltage lockout (UVLO) activates at 1.21–1.44V with 40mV hysteresis to prevent erratic behavior during brownout conditions.

Functional modes include normal regulation (VIN ≥ VOUT + VDO), dropout (VIN < VOUT + VDO, output tracks input), and disabled state (EN < 0.3V), where an integrated 120Ω pulldown resistor actively discharges the output to ground - ensuring known startup states and eliminating external discharge circuitry.

Key Specifications

Pinout & Package

TLV75507PDQNR is housed in a 1mm × 1mm, 4-pin X2SON (DQN) package with wettable flanks for automated optical inspection. The exposed thermal pad is internally connected to GND and must be soldered to a PCB ground plane for optimal thermal performance (R_θJA = 168.4°C/W per JEDEC standard).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL7407LPGQDR and TPS7A0507PDBVR, TLV75507PDQNR uniquely combines 500mA output, 0.7V fixed accuracy, active discharge, and 1µF-stable operation in a 1mm² footprint - making it the only viable option for space-limited, high-accuracy, high-current 0.7V applications.

Availability

TLV75507PDQNR is available at Aetrix Electronics and suitable for portable medical sensors, wearable health monitors, industrial edge node controllers, and smart home sensor hubs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TLV75507PDQNR 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, signal chain, and microcontroller technologies.

The TLV755P family was designed specifically for ultra-small, low-I_Q power delivery in battery-operated and space-constrained devices - targeting next-generation wearables, IoT endpoints, and portable medical equipment demanding sub-1V core rails.

FAQ

What is the minimum input voltage required for TLV75507PDQNR to regulate at 0.7V output?

The TLV75507PDQNR requires a minimum input voltage of 1.45V to operate, per its recommended operating conditions. At 0.7V output, the maximum dropout is 238mV (for 3.3VOUT variants), but for 0.7V output the dropout is higher - datasheet specifies 675–1080mV at 500mA depending on temperature and package. Thus, to sustain 500mA at 0.7V, VIN must be ≥ 1.45V, and realistically ≥ 1.7V to ensure margin across temperature and load.

Does TLV75507PDQNR support active output discharge, and how does it function?

Yes, TLV75507PDQNR features active output discharge via an internal 120Ω switch connecting OUT to GND when EN is low. This ensures rapid, controlled discharge of the output capacitor during shutdown - eliminating residual voltage that could cause undefined logic states or latch-up in downstream circuits. The discharge time depends on COUT and parallel load resistance, per τ = (120·R_L)/(120+R_L)·C_OUT.

Can TLV75507PDQNR be used with less than 1µF output capacitance?

No - the TLV75507PDQNR is specified and tested for stability with ≥1µF ceramic output capacitance. Using smaller values risks instability, oscillation, or degraded transient response. The datasheet explicitly states "Make sure the nominal input and output capacitance is greater than 0.47µF" and recommends ≥1µF for robust operation across temperature, voltage, and load conditions.

What is the thermal performance of TLV75507PDQNR in its X2SON-4 (DQN) package?

In the DQN package, TLV75507PDQNR has a JEDEC-standard R_θJA of 168.4°C/W. With proper PCB layout - including a solid GND plane connected to the thermal pad via ≥4 thermal vias - it can deliver 500mA continuously at ambient temperatures up to 60°C. Derating curves in the datasheet show junction temperature remains below 125°C under these conditions when VIN ≤ 3.3V.

Is TLV75507PDQNR compatible with ceramic capacitors having high DC bias derating?

Yes - TLV75507PDQNR is explicitly characterized and guaranteed stable with X5R and X7R ceramic capacitors. Due to DC bias effects, the datasheet recommends derating nominal capacitance by 50%, meaning a 2.2µF X7R capacitor (effective ~1.1µF at 0.7V) meets the ≥1µF requirement. Avoid Z5U or Y5V types due to excessive capacitance loss and ESR variation.