Datasheet LT3028 (Analog Devices) - 7

LT3028
W U TYPICAL PERFOR A CE CHARACTERISTICS Output 2 Output 2 Output 2 Input Ripple Rejection Input Ripple Rejection Input Ripple Rejection
80 80 80 70 70 CBYP = 0.01µF 70 60 60 60 CBYP = 1000pF 50 50 C 50 BYP = 100pF COUT = 10µF 40 40 40 30 C 30 30 OUT = 1µF RIPPLE REJECTION (dB) 20 RIPPLE REJECTION (dB) I RIPPLE REJECTION (dB) 20 20 L = 100mA I V L = 100mA IN2 = VOUT2(NOMINAL) + V V 1V + 0.5VP-P RIPPLE 10 IN2 = 2.3V + 50mVRMS RIPPLE IN2 = 2.3V + 50mVRMS RIPPLE C 10 10 BYP = 0 C AT f = 120Hz OUT = 10µF TJ = 25°C T IL = 50mA 0 J = 25°C 0 0 0.01 0.1 1 10 100 1000 0.01 0.1 1 10 100 1000 –50 –25 0 25 50 75 100 125 FREQUENCY (kHz) FREQUENCY (kHz) TEMPERATURE (°C) 3028 G26 3028 G27 3028 G28
Output 1 Output 1 Input Ripple Rejection Input Ripple Rejection Output 1 Ripple Rejection
80 80 68 70 70 CBYP = 0.01µF 66 60 60 64 C 50 OUT = 10µF 50 CBYP = 1000pF 62 CBYP = 100pF 40 40 60 30 30 58 I IL = 500mA RIPPLE REJECTION (dB) L = 500mA 20 RIPPLE REJECTION (dB) RIPPLE REJECTION (dB) V 20 56 IN1 = VOUT1(NOMINAL) + VIN1 = VOUT1(NOMINAL) + VIN1 = VOUT1(NOMINAL) + 1V + 50mV C RMS RIPPLE OUT = 4.7µF 1V + 50mVRMS RIPPLE 1V + 0.5VP-P RIPPLE 10 C 10 54 BYP = 0 COUT = 10µF AT f = 120Hz TJ = 25°C TJ = 25°C IL = 500mA 0 0 52 10 100 1k 10k 100k 1M 10 100 1k 10k 100k 1M –50 –25 0 25 50 75 100 125 FREQUENCY (Hz) FREQUENCY (Hz) TEMPERATURE (°C) 3028 G29 3028 G30 3028 G31
Output 2 Minimum Input Voltage Output 1 Minimum Input Voltage
2.5 2.50 V V OUT2 = 1.22V OUT1 = 1.22V 2.25 2.0 2.00 IL = 500mA IL = 100mA 1.75 1.5 1.50 IL = 1mA IL = 50mA 1.25 1.0 1.00 0.75 MINIMUM INPUT VOLTAGE (V) 0.5 MINIMUM INPUT VOLTAGE (V) 0.50 0.25 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3028 G32 3028 G33 3028f 7