Datasheet LT3045-1 (Analog Devices) - 10

LT3045-1
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, unless otherwise noted. ISET During Start-Up with Fast Output Overshoot Recovery Output Overshoot Recovery Start-Up Enabled Current Sink Current Sink
3.5 12 7 V V PGFB = 290mV IN = 5V 150°C VIN = 5V 3.0 V R SET = 1.3V SET = 33.2k 125°C R 10 6 SET = 33.2k 25°C VOUT – VSET > 5mV –55°C 2.5 5 8 2.0 4 (mA) 6 I SET 1.5 3 4 1.0 2 OUTPUT SINK CURRENT (mA) OUTPUT SINK CURRENT (mA) 0.5 2 1 0 0 0 0 2 4 6 8 10 12 14 16 18 20 0 5 10 15 20 –75 –50 –25 0 25 50 75 100 125 150 VIN-TO-VSET DIFFERENTIAL (V) VOUT – VSET (mV) TEMPERATURE (°C) 30451 G37 30451 G38 30451 G39
VOUT Forced Above VOUT(NOMINAL) Power Supply Ripple Rejection Power Supply Ripple Rejection
8 120 120 VIN = 5V IIN WHEN VEN = 0V C C R SET = 4.7µF OUT = 10µF SET = 33.2k IOUT WHEN VEN = 0V 110 C 110 C I OUT = 22µF IN WHEN V SET = 0.47µF EN = VIN 100 100 6 IOUT WHEN VEN = VIN 90 90 80 80 4 70 70 PSRR (dB) 60 PSRR (dB) 60 CURRENT (mA) 50 50 2 VIN = 5V 40 VIN = 5V R 40 SET = 30.1k RSET = 30.1k COUT = 10µF 30 30 CSET = 0.47µF IL = 500mA I 0 L = 500mA 20 20 4 5 6 7 8 9 10 11 12 13 14 15 10 100 1k 10k 100k 1M 10M 10 100 1k 10k 100k 1M 10M OUTPUT VOLTAGE (V) FREQUENCY (Hz) FREQUENCY (Hz) 30451 G40 30451 G41 30451 G42
Power Supply Ripple Rejection as a Function of Error Amplifier Power Supply Ripple Rejection Input Pair Power Supply Ripple Rejection
140 120 100 VIN = VOUT + 2V 110 I 90 L = 500mA 120 C 100 OUT = 10µF 80 CSET = 0.47µF 90 70 100 80 60 80 70 50 PSRR (dB) PSRR (dB) 60 PSRR (dB) 40 60 IL = 500mA 50 30 I V I L = 300mA IN = 5V 40 100kHz L = 500mA 20 40 I R V R L = 100mA SET = 30.1k OUT ≥ 1.3V 500kHz SET = 30.1k I C 0.6V < V C L = 50mA OUT = 10µF OUT < 1.3V 30 10 1MHz OUT = 10µF I C V C L = 1mA SET = 0.47µF OUT ≤ 0.6V 2MHz SET = 0.47µF 20 20 0 10 100 1k 10k 100k 1M 10M 10 100 1k 10k 100k 1M 10M 0 1 2 3 4 5 FREQUENCY (Hz) FREQUENCY (Hz) INPUT–TO–OUTPUT DIFFERENTIAL (V) 30451 G43 30451 G44 30451 G45 30451fa 10 For more information www.linear.com/LT3045-1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts