Datasheet LT1129, LT1129-3.3, LT1129-5 (Analog Devices) - 8

LT1129/LT1129-3.3/LT1129-5
TYPICAL PERFORMANCE CHARACTERISTICS Reverse Output Current Current Limit Current Limit
30 1.4 1.4 V V IN = 0V OUT = 0V VOUT = VSENSE = 5V (LT1129-5) 1.2 1.2 25 VOUT = VSENSE = 3.3V (LT1129-3.3) VOUT = VADJ = 3.75V (LT1129) 1.0 1.0 20 0.8 0.8 15 0.6 0.6 10 0.4 0.4 OUTPUT CURRENT (μA) SHORT-CIRCUIT CURRENT (A) SHORT-CIRCUIT CURRENT (A) 5 0.2 0.2 VIN = 7V VOUT = 0V 0 0 0 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 112935 G22 112935 G23 112935 G24
Reverse Output Current Ripple Rejection Ripple Rejection
100 70 100 T (V = 1V IOUT = 500mA 90 J = 25°C, VIN = 0V IN – VOUT)AVG V 90 OUT = VSENSE 68 V V RIPPLE = 0.5VP-P IN = 6V + 50mVRMS RIPPLE 80 (LT1129-3.3/LT1129-5) I 80 V L = 0.7A OUT = VADJ (LT1129) 70 CURRENT FLOWS 66 70 C INTO DEVICE OUT = 47μF 60 SOLID 64 60 TANTALUM 50 LT1129 50 62 40 40 30 LT1129-3.3 30 OUTPUT CURRENT (μA) 60 RIPPLE REJECTION (dB) RIPPLE REJECTION (dB) C 20 20 OUT = 3.3μF LT1129-5 58 SOLID 10 10 TANTALUM 0 56 0 0 1 2 3 4 5 6 7 8 9 10 –50 –25 0 25 50 75 100 125 10 100 1k 10k 100k 1M OUTPUT VOLTAGE (V) TEMPERATURE (°C) FREQUENCY (Hz) 112935 G27 112935 G25 112935 G26
LT1129-5 LT1129-5 Load Regulation Transient Response Transient Response
0 LT1129-3.3 0.10 VIN = 6V 0.2 VIN = 6V C C –5 IN = 3.3μF IN = 3.3μF 0.05 COUT = 3.3μF 0.1 COUT = 47μF 0 0 –10 LT1129* LT1129-5 –0.05 –0.1 DEVIATION (V) DEVIATION (V) OUTPUT VOLTAGE OUTPUT VOLTAGE –15 –0.10 –0.2 0.7 –20 0.5 LOAD REGULATION (mV) VIN = VOUT(NOMINAL) + 1V 0.6 0.3 –25 ΔILOAD = 1mA to 700mA (A) 0.5 (A) *V 0.1 ADJ = VOUT –30 LOAD CURRENT LOAD CURRENT –50 –25 0 25 50 75 100 125 0 50 100 150 200 250 300 350 400 450 500 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 TEMPERATURE (°C) TIME (μs) TIME (ms) 112935 G28 112935 G29 112935 G30 112935ff 8