The **ADP151ACBZ-3.0-R7** is a high-performance, ultra-low noise, low dropout (LDO) linear regulator manufactured by Analog Devices. It is designed specifically for noise-sensitive applications where space is at a premium. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Voltage** | 3.0 V (Fixed) | | **Input Voltage Range** | 2.2 V to 5.5 V | | **Maximum Output Current** | 200 mA | | **Dropout Voltage** | 140 mV (at 200 mA load) | | **Quiescent Current** | 10 µA (Typical at no load) | | **PSRR** | 70 dB at 10 kHz | | **Output Noise** | 9 µV rms (10 Hz to 100 kHz) | | **Package** | 4-ball WLCSP (Wafer Level Chip Scale Package) | --- ### 2. Core Functional Features * **Ultra-Low Noise:** The device produces very little internal electronic noise, making it ideal for powering sensitive analog circuits like RF amplifiers, ADCs, and precision sensors. * **Low Quiescent Current:** With a ground current of only 10 µA when unloaded, it is highly efficient for battery-powered devices in standby mode. * **Stability:** It is stable with small 1 µF ceramic input and output capacitors, reducing the overall PCB footprint. * **Protection Features:** * **Thermal Overload Protection:** Shuts down the device if the junction temperature exceeds limits. * **Short-Circuit Protection:** Prevents damage during current faults. * **Under-Voltage Lockout (UVLO):** Ensures the device operates only when the input voltage is high enough for stable performance. --- ### 3. Pin Configuration (WLCSP) The device comes in a tiny 0.76 mm × 0.76 mm package with four solder balls: | Ball | Symbol | Description | | :--- | :--- | :--- | | **A1** | **VIN** | Regulator Input Supply | | **A2** | **VOUT** | Regulated Output Voltage | | **B1** | **EN** | Enable Input (High = On, Low = Off) | | **B2** | **GND** | Ground Reference | --- ### 4. Part Number Breakdown The suffixing follows a specific nomenclature: * **ADP151**: Model Series (Ultra-low noise LDO). * **ACBZ**: Package Code (WLCSP). * **3.0**: Fixed Output Voltage (3.0 Volts). * **R7**: Tape and Reel packaging (7-inch reel). --- ### 5. Typical Applications * Mobile phones and digital cameras. * Portable and battery-powered equipment. * Post-regulation of switching DC-DC converters. * Precision analog-to-digital (ADC) and digital-to-analog (DAC) supply.