Texas Instruments TLV77028PDQNR

Overview

TLV77028PDQNR from Texas Instruments is a 50mA, fixed 2.8V output low-dropout linear regulator in a 1mm × 1mm X2SON-4 package, featuring 55dB PSRR at 1MHz, 45mV dropout at 50mA, and ±2% output voltage accuracy over –40°C to +125°C. It delivers stable power to noise-sensitive analog and digital circuitry in space-constrained portable electronics.

For engineers reviewing the TLV77028PDQNR datasheet, TLV77028PDQNR pinout, TLV77028PDQNR application, or TLV77028PDQNR equivalent, key selection criteria include its high PSRR for RF/ADC supply filtering, active output pulldown for controlled shutdown, compatibility with 0.47–40µF ceramic output capacitors, and operation across 1.4V–5.5V input range with thermal shutdown protection.

Technical Context

The TLV77028PDQNR employs a CMOS pass transistor architecture with internal soft-start and brick-wall current limiting. Its error amplifier and bandgap reference enable tight regulation under line and load transients, while the integrated charge pump supports reliable EN logic threshold performance across temperature.

Functional modes include normal regulation (VIN ≥ VOUT + VDO), dropout (VIN < VOUT + VDO), and disabled state with active discharge. The device enters thermal shutdown at 160°C (rising) with 20°C hysteresis and maintains stability with minimal external components: only 1µF input and ≥0.47µF ceramic output capacitors are required.

Key Specifications

Pinout & Package

TLV77028PDQNR is housed in a 1mm × 1mm, 4-pin X2SON (DQN) package with exposed thermal pad. The compact footprint supports ultra-dense PCB layouts in mobile and wearable applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A0528PDQNR, TLV77028PDQNR offers superior PSRR (55dB vs. 45dB at 1MHz) and lower dropout (45mV vs. 250mV at rated load), making it optimal for noise-sensitive, low-current 2.8V rails where dynamic rejection matters more than quiescent current or peak current capability.

Availability

TLV77028PDQNR is available at Aetrix Electronics and suitable for smartphone camera modules, industrial IoT sensor nodes, gaming console audio subsystems, and automotive cabin displays requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TLV77028PDQNR 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 TLV770 family was designed specifically for space-constrained, noise-sensitive portable electronics requiring high PSRR, fast transient response, and ultra-small packaging-targeting smartphone, tablet, and wearable power rail applications.

FAQ

What is the maximum input voltage rating for TLV77028PDQNR?

The absolute maximum input voltage for TLV77028PDQNR is 6.5V, but the recommended operating range is 1.4V to 5.5V. Exceeding 5.5V may trigger internal protection circuits or degrade long-term reliability, even if within absolute max ratings. For sustained operation, maintain VIN ≤ 5.5V with appropriate upstream transient suppression.

Does TLV77028PDQNR require an input capacitor for stability?

No, TLV77028PDQNR does not require an input capacitor for loop stability, but a minimum 1µF ceramic capacitor is recommended between IN and GND to counteract source impedance and improve transient response. This reduces input rail ringing during load steps and enhances PSRR above 10kHz.

Can TLV77028PDQNR operate with a 0.47µF output capacitor?

Yes, TLV77028PDQNR is stable with a minimum effective output capacitance of 0.47µF (ceramic), as specified in the Recommended Operating Conditions. Derating due to DC bias and temperature must be considered-the nominal capacitor value should be ≥1µF to ensure ≥0.47µF effective capacitance under worst-case conditions.

What is the purpose of the thermal pad on the TLV77028PDQNR DQN package?

The thermal pad on TLV77028PDQNR serves as the primary heat conduction path from the die to the PCB ground plane. It must be soldered to a solid GND copper area with ≥4 thermal vias to achieve the rated RθJB of 180.8°C/W. Leaving it unconnected or connecting it to a non-GND net compromises thermal performance and risks thermal shutdown under 50mA load.

How does the active pulldown feature of TLV77028PDQNR function during shutdown?

When the EN pin falls below 0.3V, TLV77028PDQNR disables regulation and activates an internal 135Ω MOSFET pulldown between OUT and GND. This discharges the output capacitor rapidly-typically within tens of microseconds-ensuring a known low-voltage state before the next enable cycle and preventing floating outputs that could cause downstream logic glitches.