GENERAL DESCRIPTION

The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 μA of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment.

The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 μF ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area.

Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch halide-free WLCSP packages and utilizes the smallest footprint solution to meet a variety of portable applications.

FEATURES

Input voltage range: 2.3 V to 5.5 V

Output voltage range: 1.2 V to 3.3 V

Output current: 150 mA

Low quiescent current

IGND = 11 μA with 0 μA load

IGND = 30 μA with 150 mA load

Low shutdown current: <1 μA

Low dropout voltage

90 mV @ 150 mA load

High PSRR

70 dB @ 1 kHz at VOUT = 1.2 V

70 dB @ 10 kHz at VOUT = 1.2 V

Low noise: 40 μV rms at VOUT = 1.2 V

No noise bypass capacitor required

Output voltage accuracy: ±1

Stable with a small 1 μF ceramic output capacitor

Current limit and thermal overload protection

Logic controlled enable

5-lead TSOT package

4-ball 0.4 mm pitch WLCSP

APPLICATIONS

Mobile phones

Digital cameras and audio devices

Portable and battery-powered equipment

Post dc-to-dc regulation

Post regulation

ADP121属于集成电路（IC） > 线性 + 开关稳压器。亚德诺半导体技术有限公司制造生产的ADP121稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。