Texas Instruments LP5907UVX1.825-S

Overview

LP5907UVX1.825-S from Texas Instruments is a 250mA, low-noise, low-I_Q LDO regulator delivering a fixed 1.825V output with ±2% tolerance, 120mV typical dropout at 250mA, <6.5µV_RMS output noise, and 82dB PSRR at 1kHz - designed for RF and analog power rails in space-constrained portable devices.

For engineers reviewing the LP5907UVX1.825-S datasheet, LP5907UVX1.825-S pinout, LP5907UVX1.825-S application, or LP5907UVX1.825-S equivalent, this page provides verified package mapping (DSBGA-4, YKE), confirmed pin functions (IN/OUT/EN/GND), thermal performance data (R_θJA = 206.1°C/W), remote capacitor support up to 10cm, and two validated alternative LDOs for noise-sensitive analog/RF supply design.

Technical Context

The LP5907UVX1.825-S uses an innovative internal RC-filtered reference architecture to achieve <6.5µV_RMS noise without a bypass capacitor, while its adaptive control loop maintains stability with only 1µF ceramic input and output capacitors. Its enable pin features a 1MΩ internal pulldown and 230Ω output discharge path for controlled shutdown.

It operates across –40°C to 125°C junction temperature, supports remote output capacitor placement up to 10cm from the device, and integrates thermal shutdown (160°C trip, 145°C hysteresis) and short-circuit current limiting (250–500mA). No UVLO circuitry is included; regulation begins only when V_IN ≥ max(2.2V, V_OUT + V_DO).

Key Specifications

Pinout & Package

LP5907UVX1.825-S is packaged in a 0.685mm × 0.685mm, 4-pin DSBGA (YKE) with bottom-side solder balls. The package is optimized for ultra-low profile (<0.4mm height) and high thermal performance in compact mobile designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with LP5907UVX1.825-S, TPL72018PDQNR trades noise performance and size for lower cost, while TPS7A20185PDBVR offers higher current and thermal margin at a slightly elevated output voltage - both require revalidation of load voltage tolerance and PCB layout due to differing packages and thermal characteristics.

Availability

LP5907UVX1.825-S is available at Aetrix Electronics and suitable for smartphone RF power, digital camera ISP supply, industrial sensor node MCU core, and factory automation analog I/O modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LP5907UVX1.825-S 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, embedded processing, and power management technologies, with leadership in high-performance, low-power, and automotive-grade components.

The LP5907UVX1.825-S belongs to TI's LP5907 family of ultra-low-noise LDOs, engineered specifically for RF and precision analog power delivery in battery-powered portable electronics where noise, size, and quiescent current are critical constraints.

FAQ

What is the exact output voltage tolerance of LP5907UVX1.825-S?

The LP5907UVX1.825-S has a guaranteed output voltage tolerance of ±2% over temperature, line, and load conditions per its datasheet (Section 5.5, ΔV_OUT). This means the actual output remains within 1.7885V to 1.8615V at 25°C and across the full operating range of 2.2V–5.5V input and 0–250mA load. The "UVX" suffix confirms it is a fixed 1.825V variant in the YKE DSBGA package.

Does LP5907UVX1.825-S require an external noise bypass capacitor?

No, LP5907UVX1.825-S does not require an external noise bypass capacitor. Its internal RC-filtered reference architecture delivers <6.5µV_RMS output noise (10Hz–100kHz) without one - a key differentiator versus conventional LDOs. This eliminates a discrete component, reduces PCB area, and avoids capacitor-related aging or ESR drift effects on noise performance.

What is the maximum allowable distance for remote placement of the output capacitor with LP5907UVX1.825-S?

The LP5907UVX1.825-S supports remote output capacitor placement up to 10cm from the device's OUT pin, as confirmed in Section 6.3.4 of the datasheet. This is enabled by its robust control-loop design and stability with only 1µF ceramic capacitance. For best transient response, TI recommends keeping trace inductance low and using a solid ground plane between the capacitor and LP5907UVX1.825-S.

What thermal protection features does LP5907UVX1.825-S include?

LP5907UVX1.825-S integrates thermal shutdown (TSD) that trips at approximately 160°C junction temperature and resets at ~145°C hysteresis. It also includes short-circuit current limiting (250–500mA). These protections prevent permanent damage during overload or inadequate heatsinking. However, the datasheet explicitly states TSD is intended for temporary overload only - continuous cycling indicates insufficient thermal design and may degrade reliability.

Can LP5907UVX1.825-S operate with input voltage below 2.2V?

No, LP5907UVX1.825-S is not functional below 2.2V input. Section 6.4.2 states it lacks dedicated UVLO circuitry and requires V_IN ≥ max(2.2V, V_OUT + V_DO) for regulation. At 1.825V output, minimum functional input is ~1.945V (1.825V + 120mV dropout), but the device's internal circuitry only powers up reliably above 2.2V - operation below this risks undefined behavior or failure to regulate.