Texas Instruments TLV73325PDQNR

Overview

TLV73325PDQNR from Texas Instruments is a capacitor-free, 300-mA, low-dropout linear regulator (LDO) in a 1.0-mm × 1.0-mm X2SON-4 package, delivering 2.5 V output with 1.4% max accuracy, 125 mV dropout at 300 mA (V_OUT = 3.3 V), and 34 µA quiescent current - optimized for space-constrained battery-powered applications such as camera modules and smartphone PMIC rails.

For engineers reviewing the TLV73325PDQNR datasheet, TLV73325PDQNR pinout, TLV73325PDQNR application, or TLV73325PDQNR equivalent, key selection criteria include capacitor-free stability, active output discharge, foldback current limiting, thermal shutdown behavior, and compatibility with 1.4–5.5 V input sources in ultra-small footprint designs.

Technical Context

The TLV73325PDQNR uses a PMOS pass transistor architecture enabling true capacitor-free operation - stable without input or output capacitors - while maintaining fast load transient response and low noise. Its undervoltage lockout (UVLO) activates below 1.25 V (falling) and releases above 1.3 V (rising), and its enable threshold is defined by V_EN(HI) ≥ 0.9 V and V_EN(LO) ≤ 0.35 V.

It integrates foldback current limiting (typical short-circuit current 150–170 mA depending on V_OUT), active pull-down (120 Ω discharge path), and thermal shutdown (trip at 160 °C, reset at 140 °C). The device operates across –40 °C to +125 °C junction temperature with 50 dB PSRR at 1 kHz and 120 µV_RMS output noise (10 Hz–100 kHz, V_OUT = 1.8 V).

Key Specifications

Pinout & Package

TLV73325PDQNR is housed in a 1.0-mm × 1.0-mm, 4-pin X2SON (DQN) package with exposed thermal pad electrically tied to GND. The package supports high-density layout and efficient heat dissipation when soldered to a GND plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLC73325PDQNR and TPS73325DBVR, TLV73325PDQNR uniquely combines capacitor-free stability, active output discharge, and 34 µA IQ in a 1-mm² footprint - making it optimal for miniaturized, battery-sensitive designs where layout simplicity and fast shutdown response are critical.

Availability

TLV73325PDQNR is available at Aetrix Electronics and suitable for smartphone camera modules, wearable sensor bias rails, USB-C peripheral PMIC sub-rails, and industrial IoT edge node core logic requiring stable component supply with guaranteed long-term sourcing.

Supply support for TLV73325PDQNR 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 high-reliability signal chain solutions.

The TLV733 series was designed specifically for ultra-small, low-I_Q, capacitor-free LDO applications in portable and space-constrained electronics - targeting battery-powered imaging, sensing, and connectivity subsystems.

FAQ

Does TLV73325PDQNR require input or output capacitors to operate stably?

No, TLV73325PDQNR is architecturally stable without any input or output capacitors - a key differentiator of its capacitor-free design. While optional 1-µF ceramic capacitors on IN and OUT improve line/load transient response and PSRR, they are not required for basic regulation or stability. This eliminates BOM cost, board area, and inrush current concerns at startup.

What is the maximum input voltage rating for TLV73325PDQNR?

The absolute maximum input voltage for TLV73325PDQNR is 6.0 V, but the recommended operating range is 1.4 V to 5.5 V. Operation above 5.5 V risks permanent damage, and operation below 1.4 V triggers undervoltage lockout (UVLO), disabling regulation until VIN rises above 1.3 V (UVLO rising threshold).

How does the enable pin (EN) function on TLV73325PDQNR?

The EN pin on TLV73325PDQNR is active-high with V_EN(HI) ≥ 0.9 V (min) to enable regulation and V_EN(LO) ≤ 0.35 V (max) to disable. There is no internal pull-up or pull-down resistor, so external logic must drive EN explicitly. When disabled, the 120 Ω internal pulldown discharges the output, ensuring rapid V_OUT decay.

What thermal protection features does TLV73325PDQNR include?

TLV73325PDQNR includes thermal shutdown that disables the output at ~160 °C junction temperature and re-enables it at ~140 °C after cooling. It also features foldback current limiting, which reduces output current during overloads or shorts - collectively preventing destructive power dissipation and enabling safe recovery without external circuitry.

Is TLV73325PDQNR pin-compatible with other TLV733 variants?

Yes - all TLV733P devices in the DQN (X2SON-4) package share identical pinout: Pin 1 = OUT, Pin 2 = GND, Pin 3 = EN, Pin 4 = IN. TLV73325PDQNR is therefore pin-compatible with TLV73310PDQNR, TLV73318PDQNR, TLV73333PDQNR, and other fixed-output versions in the same package, enabling easy voltage rail optimization without layout changes.