Texas Instruments TLV77325PDBVR

Overview

TLV77325PDBVR from Texas Instruments is a 300mA, fixed 2.5V output low-dropout linear regulator in SOT-23-5 package, featuring 80dB PSRR at 217Hz, 180mV dropout at 300mA (2.5V_OUT), and ±2% output voltage accuracy over −40°C to +125°C. It delivers stable power for noise-sensitive analog rails in portable consumer electronics.

For engineers reviewing the TLV77325PDBVR datasheet, TLV77325PDBVR pinout, TLV77325PDBVR application, or TLV77325PDBVR equivalent, key selection criteria include its 1.4V–5.5V input range, active output pulldown, foldback current limit, and compatibility with 0.47µF–40µF ceramic output capacitors without external compensation.

Technical Context

The TLV77325PDBVR integrates a CMOS pass transistor with R_DS(ON) optimized for sub-250mV dropout at 300mA and 2.5V output, enabling operation from as low as 2.75V input. Its internal soft-start limits inrush current, while the enable-controlled active pulldown resistor (135Ω typical) ensures rapid, controlled V_OUT discharge during shutdown.

It employs a hybrid brick-wall/foldback current-limit architecture: 350–720mA brick-wall limit above VFOLDBACK (~1.8V), transitioning to ~65mA short-circuit limit near GND. Thermal shutdown triggers at 160°C with 20°C hysteresis, and PSRR remains ≥55dB up to 1MHz under 50mA load.

Key Specifications

Pinout & Package

TLV77325PDBVR uses the 5-pin SOT-23 (DBV) package (2.9mm × 2.8mm), with thermal pad omitted - unlike the DQN variant. Pin 4 is no-connect (N/C) and must be tied to GND for optimal thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLS850F25T and MCP1700-2502E/TO, TLV77325PDBVR offers superior PSRR (80dB vs. ≤65dB), active pulldown for precise power sequencing, and smaller SOT-23 footprint - making it optimal for high-density portable electronics where noise rejection and fast shutdown behavior are essential.

Availability

TLV77325PDBVR is available at Aetrix Electronics and suitable for smartphone baseband power, industrial camera modules, gaming console audio codecs, and set-top box HDMI PHY applications requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for TLV77325PDBVR 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 specializing in analog, embedded processing, and power management technologies, with decades of LDO design heritage and broad automotive/industrial qualification.

The TLV773 product line targets space-constrained, noise-sensitive portable electronics, delivering high PSRR, low quiescent current, and robust fault protection in ultra-small packages for next-generation mobile and edge devices.

FAQ

What is the maximum input voltage rating for TLV77325PDBVR?

The absolute maximum input voltage for TLV77325PDBVR is 6.5V, but the recommended operating range is 1.4V to 5.5V. Exceeding 5.5V risks violating safe operating area limits and may trigger thermal shutdown or permanent damage. For reliable 2.5V output regulation, VIN must remain ≥2.68V (2.5V + 180mV dropout) under full 300mA load.

Does TLV77325PDBVR require an input capacitor for stability?

TLV77325PDBVR does not require an input capacitor for loop stability, but a minimum 1µF ceramic capacitor is strongly recommended between IN and GND. This reduces source impedance effects, improves PSRR by >15dB at 100kHz, and prevents ringing during load transients - especially when the input source has >0.5Ω impedance or is located >2 inches from the device.

How does the active pulldown function in TLV77325PDBVR operate?

When TLV77325PDBVR is disabled (VEN < 0.3V), an internal 135Ω MOSFET connects OUT to GND, actively discharging output capacitance. This ensures V_OUT falls below 0.1V within microseconds, eliminating floating states during power sequencing. The pulldown remains active until VIN drops below UVLO or EN rises above 0.9V, and is independent of external circuitry.

Can TLV77325PDBVR support ceramic output capacitors as low as 0.47µF?

Yes - TLV77325PDBVR is internally compensated and stable with ceramic output capacitors ranging from 0.47µF to 40µF and ESR ≤100mΩ. At 0.47µF, it maintains ≥6dB phase margin across temperature and load. Derating due to DC bias and temperature is accounted for in the 0.47µF minimum specification, so a nominal 1µF X7R capacitor is typically used for margin.

What thermal performance can be expected from TLV77325PDBVR in SOT-23 package?

In the DBV (SOT-23-5) package, TLV77325PDBVR has R_θJA = 242.5°C/W (JEDEC standard board). With proper PCB layout - including 1-in² copper pour on top layer, 2oz copper on inner layers, and 6 thermal vias - junction-to-ambient rise is ~36°C at 300mA with 2.5V dropout (0.75W dissipation), keeping TJ well below 125°C at 85°C ambient.