Datasheet LT3668 (Analog Devices) - 8
| Manufacturer | Analog Devices |
| Description | 40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs |
| Pages / Page | 28 / 8 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 386 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. LDOs:. IN2, IN3 Quiescent Current
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LT3668
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. LDOs: LDOs: LDOs: IN2, IN3 Quiescent Current 5V Quiescent Current IN2 5V Quiescent Current IN3/BD
60 100 100 VIN1 = VEN = 12V VIN1 = VEN = 12V 90 VADJ2 = 5V 90 VADJ3 = 5V 50 IN2 80 80 (µA) (µA) 40 IN2 70 70 IN3/BD IN3/BD 60 60 30 50 50 VIN2/3 = 6V VEN2/ILIM2 = 0V VEN = 12V, VIN1 = 0 40 40 20 VOUT2/3 = 5V I 30 30 V QUIESCENT CURRENT (µA) LOAD = 5µA EN3/ILIM3 = 0V 10 QUIESCENT CURRENT I 20 20 V V QUIESCENT CURRENT I IN2/3 = 6V EN2/ILIM2 = 2V V 10 10 EN = 0.3V VEN3/ILIM3 = 2V 0 0 0 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 TEMPERATURE (°C) V V 3668 G28 IN2 (V) 3668 G29 IN3/BD (V) 3668 G30
LDOs: LDOs: ADJ2, ADJ3 Pin Bias Current Internal Current Limit Internal Current Limit
400 350 325 VIN2/3-VOUT2/3(NOMINAL) = 1V 350 300 300 250 300 200 275 250 150 250 200 CURRENT LIMIT (mA) 100 CURRENT LIMIT (mA) TA = 140°C TA = 140°C ADJ2/3 PIN BIAS CURRENT (nA) 150 T 225 50 A = 125°C TA = 125°C TA = 25°C TA = 25°C VADJ2/3 = 5V TA = –50°C TA = –50°C 100 0 200 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 TEMPERATURE (°C) INPUT/OUTPUT DIFFERENTIAL (V) OUTPUT VOLTAGE (V) 3668 G31 3668 G32 3668 G33
LDOs: LDOs: LDOs: Reverse Output Current Reverse Output Current Input Ripple Rejection
1.2 40 120 VIN2/3 = 0V V I OUT2/3 = VADJ2/3 = 10V OUT2/3 35 VIN2/3 = 0V 1.0 100 OUT2 30 0.8 80 25 OUT3 IADJ2/3 0.6 20 60 CURRENT (mA) 15 I 0.4 CURRENT (µA) OUT2/3 40 10 VIN1 = 12V 0.2 INPUT RIPPLE REJECTION (dB) 20 IOUT2/3 = 200mA 5 V I OUT2/3 = 5V ADJ2/3 VIN2/3 = 6V + 50mVRMS RIPPLE 0 0 0 0 5 10 15 20 25 30 35 40 45 –50 –25 0 25 50 75 100 125 150 10 100 1k 10k 100k 1M 10M VOLTAGE (V) TEMPERATURE (°C) FREQUENCY (Hz) 3668 G34 3668 G35 3668 G36 3668fa 8 For more information www.linear.com/LT3668 Document Outline Features Applications Description Typical Application Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. LDOs: LDOs: LDOs: IN2, IN3 Quiescent Current 5V Quiescent Current IN2 5V Quiescent Current IN3/BD
60 100 100 VIN1 = VEN = 12V VIN1 = VEN = 12V 90 VADJ2 = 5V 90 VADJ3 = 5V 50 IN2 80 80 (µA) (µA) 40 IN2 70 70 IN3/BD IN3/BD 60 60 30 50 50 VIN2/3 = 6V VEN2/ILIM2 = 0V VEN = 12V, VIN1 = 0 40 40 20 VOUT2/3 = 5V I 30 30 V QUIESCENT CURRENT (µA) LOAD = 5µA EN3/ILIM3 = 0V 10 QUIESCENT CURRENT I 20 20 V V QUIESCENT CURRENT I IN2/3 = 6V EN2/ILIM2 = 2V V 10 10 EN = 0.3V VEN3/ILIM3 = 2V 0 0 0 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 TEMPERATURE (°C) V V 3668 G28 IN2 (V) 3668 G29 IN3/BD (V) 3668 G30
LDOs: LDOs: ADJ2, ADJ3 Pin Bias Current Internal Current Limit Internal Current Limit
400 350 325 VIN2/3-VOUT2/3(NOMINAL) = 1V 350 300 300 250 300 200 275 250 150 250 200 CURRENT LIMIT (mA) 100 CURRENT LIMIT (mA) TA = 140°C TA = 140°C ADJ2/3 PIN BIAS CURRENT (nA) 150 T 225 50 A = 125°C TA = 125°C TA = 25°C TA = 25°C VADJ2/3 = 5V TA = –50°C TA = –50°C 100 0 200 –50 –25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 TEMPERATURE (°C) INPUT/OUTPUT DIFFERENTIAL (V) OUTPUT VOLTAGE (V) 3668 G31 3668 G32 3668 G33
LDOs: LDOs: LDOs: Reverse Output Current Reverse Output Current Input Ripple Rejection
1.2 40 120 VIN2/3 = 0V V I OUT2/3 = VADJ2/3 = 10V OUT2/3 35 VIN2/3 = 0V 1.0 100 OUT2 30 0.8 80 25 OUT3 IADJ2/3 0.6 20 60 CURRENT (mA) 15 I 0.4 CURRENT (µA) OUT2/3 40 10 VIN1 = 12V 0.2 INPUT RIPPLE REJECTION (dB) 20 IOUT2/3 = 200mA 5 V I OUT2/3 = 5V ADJ2/3 VIN2/3 = 6V + 50mVRMS RIPPLE 0 0 0 0 5 10 15 20 25 30 35 40 45 –50 –25 0 25 50 75 100 125 150 10 100 1k 10k 100k 1M 10M VOLTAGE (V) TEMPERATURE (°C) FREQUENCY (Hz) 3668 G34 3668 G35 3668 G36 3668fa 8 For more information www.linear.com/LT3668 Document Outline Features Applications Description Typical Application Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts
