Analog Devices Inc./Maxim Integrated MAX8510EXK45

Overview

MAX8510EXK45 from Maxim Integrated is an ultra-low-noise, low-dropout linear regulator delivering 120mA output with 4.5V preset output voltage, 120mV dropout at full load, 11µVRMS output noise (100Hz–100kHz), and 78dB PSRR at 1kHz. It serves as a precision power supply for RF and analog signal chains in portable wireless devices.

For engineers reviewing the MAX8510EXK45 datasheet, MAX8510EXK45 pinout, MAX8510EXK45 application, or MAX8510EXK45 equivalent, key selection criteria include ultra-low noise performance, SC70-5 package footprint, guaranteed 4.5V output accuracy (±3%), shutdown current <1µA, and stability with only 1µF ceramic output capacitance.

Technical Context

The MAX8510EXK45 employs a P-channel MOSFET pass transistor with 1Ω typical 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 to maintain regulation across load and line variations.

Noise reduction is achieved via a dedicated BP pin accepting a 10nF capacitor to OUT, which shunts high-frequency noise from the internal reference and error amplifier. Shutdown logic disables the reference, error amp, and gate driver, reducing quiescent current to <0.05µA at +85°C.

Key Specifications

Pinout & Package

MAX8510EXK45 is packaged in a 5-pin SC70-5 (2.0mm × 1.25mm × 0.9mm) with exposed pad option not applicable; pin 1 is IN, pin 2 is GND, pin 3 is SHDN, pin 4 is BP, pin 5 is OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS79545DBVR and MCP1703T-4502E/MB, the MAX8510EXK45 delivers superior noise and PSRR performance in the smallest SC70-5 footprint, making it optimal for space-constrained, high-fidelity analog power domains where every microvolt of noise matters.

Availability

MAX8510EXK45 is available at Aetrix Electronics and suitable for cellular front-end power, Bluetooth audio SoC supply, digital camera image sensor bias, portable medical pulse oximeter, and other applications requiring stable component supply with ultra-low-noise regulation.

Supply support for MAX8510EXK45 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and consumer markets.

The MAX8510 series belongs to Maxim's ultra-low-noise LDO product line, engineered specifically for powering noise-sensitive RF, audio, and imaging circuits in battery-operated portable electronics.

FAQ

What is the maximum input voltage rating for the MAX8510EXK45?

The MAX8510EXK45 has an absolute maximum input voltage of +7V referenced to GND. However, its operational input range is specified from 2V to 6V. Exceeding 6V may cause excessive power dissipation or violate safe operating area limits, especially at elevated temperatures. Always maintain VIN ≤ 6V for reliable long-term operation of the MAX8510EXK45.

Does the MAX8510EXK45 require an external feedback resistor network?

No, the MAX8510EXK45 does not require an external feedback resistor network. It is a fixed-output regulator with factory-trimmed 4.5V output. The FB pin is absent in this variant-only the adjustable MAX8512 uses external resistors. The MAX8510EXK45 relies on internal precision resistors and a 1.225V bandgap reference to achieve ±3% output accuracy across temperature and load.

Can the MAX8510EXK45 operate stably with a 0.47µF output capacitor?

No, the MAX8510EXK45 is not guaranteed stable with 0.47µF output capacitance. The datasheet specifies minimum 1µF ceramic capacitance for unconditional stability across all loads and temperatures. Using 0.47µF risks oscillation or degraded transient response, particularly near dropout or at high ambient temperatures. Always use ≥1µF X7R/X5R ceramic capacitor directly at the MAX8510EXK45 OUT pin.

What is the purpose of the BP pin on the MAX8510EXK45?

The BP (Bypass) pin on the MAX8510EXK45 provides a dedicated connection point for a 10nF capacitor to the OUT pin, forming a low-impedance shunt path for high-frequency noise generated by the internal bandgap and error amplifier. This configuration reduces output voltage noise from ~230µVRMS (as seen in MAX8511/MAX8512) to just 11µVRMS. During shutdown, the BP pin is internally shorted to OUT, preserving capacitor charge.

How does thermal shutdown behave on the MAX8510EXK45 during continuous overload?

The MAX8510EXK45 activates thermal shutdown at +160°C junction temperature and latches off until the die cools by 10°C (to +150°C), then automatically resumes regulation. Under continuous overload, this results in pulsed output-on/off cycling-with duty cycle dependent on ambient temperature and PCB thermal design. This protects the device but is not intended for sustained operation; proper heatsinking or derating is required to avoid entering thermal cycling during normal use of the MAX8510EXK45.