ADP225ACPZ-R7

The 300 mA, adjustable dual output ADP223/ADP225 and fixed dual output ADP222/ADP224 combine high PSRR, low noise, low quiescent current, and low dropout voltage in a voltage regulator that is ideally suited for wireless applications with demanding performance and board space requirements. The ADP222/ADP224 are available with fixed outputs voltages from 0.8V to 3.3V. The adjustable output ADP223/ADP225 may be set to output voltages from 0.5 V to 5.0 V. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP222/ADP223/ADP224/ADP225 extend the battery life of portable devices. The ADP222/ADP223/ADP224/ADP225 maintain power supply rejection greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP222/ADP223/ADP224/ADP225 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor. Overcurrent and thermal protection circuitry prevent damage in adverse conditions. The ADP224 and ADP225 are identical to the ADP222 and ADP223, respectively, but with the addition of a quick output discharge (QOD) feature. The ADP222/ADP223/ADP224/ADP225 are available in a small 8-lead, 2 mm×2 mm LFCSP package and are stable with tiny 1 µF, ±30% ceramic output capacitors, resulting in the smallest possible board area for a wide variety of portable power needs.

Applications

• Portable and battery-powered equipment
• Portable medical devices
• Post dc-to-dc regulation
• Point of sale terminals
• Credit card readers
• Automatic meter readers
• Wireless network equipment

Key features

• Input voltage range: 2.5 V to 5.5 V
• Small, 8-lead, 2 mm×2 mm LFCSP package
• Initial accuracy: ±1%
• High PSRR: 70 dB at 10 kHz, 60 dB at 100 kHz, 40 dB at 1 MHz
• Low noise: 27 μV rms at Vour = 1.2 V, 50 μV rms at VOσ = 2.8 V
• Excellent transient response
• Low dropout voltage: 170 mV at 300 mA load
• 65 μA typical ground current at no load, both LDOs enabled
• Fixed output voltage from 0.8 V to 3.3 V (ADP222/ADP224)
• Adjustable output voltage range from 0.5 V to 5.0 V (ADP223/ADP225)
• Quick output discharge (QOD)—ADP224/ADP225
• Overcurrent and thermal protection