Analog Devices Inc./Maxim Integrated MAX8510EXK27+

Overview

The MAX8510EXK27+ from Maxim Integrated is a 2.7V fixed-output, ultra-low-noise, low-dropout linear regulator featuring a P-channel MOSFET pass element, 120mV dropout at 120mA, 11µV_RMS output noise (100Hz–100kHz), and 78dB PSRR at 1kHz. It delivers stable 2.7V power to noise-sensitive analog circuitry in portable RF and precision signal-chain applications.

For engineers reviewing the MAX8510EXK27+ datasheet, MAX8510EXK27+ pinout, MAX8510EXK27+ application, or MAX8510EXK27+ equivalent, key selection criteria include its SC70-5 package footprint, 40µA ground current at light load, shutdown current <1µA, 1µF ceramic capacitor stability, and BP-pin–enabled ultra-low-noise performance.

Technical Context

The MAX8510EXK27+ employs a P-channel MOSFET series pass transistor with ~1Ω R_DS(ON), enabling low dropout and eliminating base-drive current loss. Its bandgap reference (1.225V) feeds an error amplifier that controls the pass gate via internal feedback-no external resistors required for the 2.7V preset output.

Noise suppression relies on a dedicated BP pin connected to a 10nF capacitor between BP and OUT, which shunts high-frequency noise from the bandgap core. During shutdown, the voltage reference, error amplifier, and gate drive are disabled, reducing supply current to <1µA while placing OUT in high-impedance state.

Key Specifications

Pinout & Package

MAX8510EXK27+ uses the 5-pin SC70-5 package (2.0mm × 1.25mm × 0.95mm), with exposed pad not present-only available in TDFN variants. The GND pin serves dual electrical and thermal functions; PCB layout must use adequate copper area for heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79527DRVR and MCP1703T-2702E/MB, the MAX8510EXK27+ offers the lowest output noise and smallest required output capacitance-making it uniquely suitable for RF and precision analog supply domains where noise and board area are primary constraints.

Availability

MAX8510EXK27+ is available at Aetrix Electronics and suitable for cellular front-end power, portable audio codec supply, digital camera image sensor bias, and wearable health sensor signal chain applications requiring stable component supply across extended production lifecycles.

Supply support for MAX8510EXK27+ 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

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, communications, and consumer applications.

The MAX8510EXK27+ belongs to Maxim's ultra-low-noise LDO family, engineered specifically for powering noise-sensitive RF, audio, and imaging signal chains in battery-operated portable equipment.

FAQ

What is the output voltage tolerance of the MAX8510EXK27+ over temperature and load?

The MAX8510EXK27+ guarantees ±3% output voltage accuracy across -40°C to +85°C ambient temperature and for output loads from 100µA to 80mA. At room temperature and 1mA load, typical deviation is ±1%. This tight tolerance ensures reliable operation of 2.7V logic interfaces and analog circuits without external trimming. The MAX8510EXK27+ maintains this specification using an internal trimmed bandgap reference and precision feedback divider.

Can the MAX8510EXK27+ operate stably with a 1µF ceramic output capacitor?

Yes, the MAX8510EXK27+ is fully characterized and guaranteed stable with a 1µF X7R or X5R ceramic output capacitor across all load conditions and temperatures. Unlike many LDOs requiring 4.7µF or higher, its internal compensation and P-MOSFET architecture eliminate ESR dependency. Using Z5U or Y5V dielectrics may require ≥2.2µF below -10°C, but X7R/X5R 1µF is sufficient per datasheet specifications for the MAX8510EXK27+.

What is the purpose of the BP pin on the MAX8510EXK27+ and how should it be used?

The BP (Bypass) pin on the MAX8510EXK27+ connects to an internal noise-reduction node tied to the bandgap reference. For optimal 11µV_RMS noise performance, a 10nF capacitor must be placed between BP and OUT. This capacitor shunts high-frequency noise before it reaches the error amplifier. During shutdown, BP is internally shorted to OUT, so no additional isolation is needed. Capacitance values outside 1nF–100nF degrade noise reduction for the MAX8510EXK27+.

Does the MAX8510EXK27+ include overcurrent and thermal protection?

Yes, the MAX8510EXK27+ integrates both overcurrent limiting and thermal shutdown. Its current limit activates at 130mA (min) to 300mA (max), protecting against sustained shorts. Thermal shutdown triggers at +160°C junction temperature, with 10°C hysteresis-allowing safe cooldown before automatic recovery. These protections are fully internal and require no external components, ensuring robust operation in the MAX8510EXK27+ across its full -40°C to +85°C rating.

What is the maximum input voltage the MAX8510EXK27+ can tolerate?

The MAX8510EXK27+ has an absolute maximum input voltage of +7V referenced to GND. However, its recommended operating input range is 2V to 6V. Exceeding 6V risks exceeding the 0.247W power dissipation limit in the SC70-5 package, especially at elevated ambient temperatures. For continuous operation, VIN should remain ≤6V; transient spikes beyond 7V may cause permanent damage. This 2V–6V window aligns with single-cell Li-ion (2.7–4.2V) and 3.3V/5V system rail requirements for the MAX8510EXK27+.