The ISL9021A is a single LDO, which provides high performance, low input voltage and high PSRR. It delivers guaranteed continuous 250mA load current and is stable with 1µF to 4.7µF of output capacitance (±30) with an ESR range of 5mΩ to 400m.

The input voltage range for the ISL9021A is between 1.5V to 5.5V and the output voltage comes in many fixed voltage options with ±1.8 accuracy over-temperature, line and load ranges. The ISL9021A has typical PSRR of 75dB @ 10kHz and 50dB @ 1MHz.

Features

• High performance LDO with 250mA guaranteed continuous output current

• Input voltage range: 1.5V to 5.5V

• Output voltage range: 1.2V to 3.3V

• High PSRR: 75dB @ 10kHz, 50dB @ 1MHz

• Low quiescent current: 35µA

• Dropout voltage: <150mV @ 250mA

• Stable with 1µF to 4.7µF output capacitance (±30) with an ESR range of 5mΩ to 400m

• ±1.8 output accuracy over-temperature/load/line

• Soft-start limits input current surge during enable

• Current limit and overheat protection

• -40°C to +85°C operating temperature range

• Available in 0.975mmx1.155mm 4-bump WLCSP package and 1.6mmx1.6mm 6 Ld µTDFN

• Pb-free (RoHS compliant)

Applications

• PDAs, cell phones and smart phones

• Portable instruments, MP3 players

• Handheld devices including medical handheld

ISL9021A属于集成电路（IC） > 线性 + 开关稳压器。瑞萨科技有限公司制造生产的ISL9021A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。