Diodes Incorporated PT7M8202B25TA5EX

Overview

PT7M8202B25TA5EX from Pericom Semiconductor is a high-accuracy, ultra-low-noise LDO regulator optimized for RF power supply in portable wireless devices. It delivers 300mA output current with 270mV dropout at 3.3V output, 30µVRMS output noise (10Hz–100kHz), and 80dB PSRR at 1kHz - enabling clean biasing of RF transceivers, VCOs, and PLLs in mobile handsets and digital cameras.

For engineers reviewing the PT7M8202B25TA5EX datasheet, PT7M8202B25TA5EX pinout, PT7M8202B25TA5EX application, or PT7M8202B25TA5EX equivalent, key selection criteria include its 2.5V fixed output voltage, SOT23-5L package, EN-controlled quick start-up (50µs), low standby current (0.1µA), and BP-pin-enabled noise suppression for sensitive analog/RF rails.

Technical Context

The PT7M8202B25TA5EX uses a P-channel MOSFET pass element with internal phase compensation, enabling stable regulation with 1µF ceramic input/output capacitors. Its error amplifier compares a resistive-divided output against a precision bandgap reference, while the BP pin connects to a 22nF capacitor to shunt reference noise - directly reducing output voltage ripple without external filtering.

Thermal shutdown activates at 170°C with 40°C hysteresis, and current-limit protection engages at 450mA (typical) to prevent damage during short-circuit events. The EN pin is high-active (logic-high enables regulation), supporting system-level power sequencing in battery-powered applications requiring low-quiescent operation.

Key Specifications

Pinout & Package

SOT23-5L (TA5) package: 2.9mm × 1.6mm × 1.1mm body, lead-free and RoHS-compliant, optimized for space-constrained PCB layouts in mobile modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6220B251MR-G and RT9193-25GB, PT7M8202B25TA5EX uniquely combines 30µVRMS noise, BP-pin noise suppression, and 0.1µA standby - making it the only choice for RF-sensitive, battery-constrained designs requiring simultaneous low noise and ultra-low power.

Availability

PT7M8202B25TA5EX is available at Aetrix Electronics and suitable for mobile handset RF front-ends, digital camera image sensor biasing, and Bluetooth headset baseband ICs requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for PT7M8202B25TA5EX 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

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-performance interface, timing, and power management ICs for communications and computing markets before its 2016 acquisition.

The PT7M8202 series was designed specifically for RF power integrity in portable wireless devices - emphasizing ultra-low noise, fast transient response, and minimal external component count for space-constrained PCBs.

FAQ

What is the function of the BP pin on PT7M8202B25TA5EX?

The BP (Bypass) pin connects to a 22nF capacitor to ground to filter internal reference voltage noise, directly reducing output voltage ripple. This pin is essential to achieve the specified 30µVRMS noise performance - PCB layout requires a direct, low-inductance connection with trace length under 1mm to avoid degrading noise suppression.

Can PT7M8202B25TA5EX operate with input voltage below 2.5V?

Yes - the device supports input voltages from 1.8V to 5.5V. With a 2.5V output, minimum functional input is 2.72V (2.5V + 220mV typical dropout). Below this, regulation fails and VOUT drops linearly with VIN; operation at 2.5V input is possible only in dropout mode with reduced load capability and higher noise.

Is the EN pin active-high or active-low for PT7M8202B25TA5EX?

The EN pin is high-active: applying ≥1.5V (relative to GND) enables regulation; ≤0.3V disables it. The "B" in the part number denotes high-active enable logic. Floating the EN pin increases supply current - it must be hard-wired to VIN or GND, not left unconnected.

Which ceramic capacitor dielectric is recommended for PT7M8202B25TA5EX input/output?

X5R or X7R dielectric 1µF ceramic capacitors are required for both input (VIN–GND) and output (VOUT–GND) to ensure stability and transient response. These dielectrics maintain capacitance over voltage and temperature; Y5V or Z5U types exhibit excessive capacitance loss and risk instability due to DC bias effects.