Datasheet LTC3833 (Analog Devices) - 7
| 制造商 | Analog Devices |
| 描述 | Fast Accurate Step-Down DC/DC Controller with Differential Output Sensing |
| 页数 / 页 | 36 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| 文件格式/大小 | PDF / 530 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. tON(MIN) and tOFF(MIN). vs Voltage on VOUT Pin
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LTC3833
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) vs Voltage on VOUT Pin vs Voltage on VIN Pin vs Switching Frequency
100 100 100 90 90 tOFF(MIN) 90 tOFF(MIN) 80 tOFF(MIN) 80 80 70 70 70 60 60 60 50 50 t 50 ON(MIN) TIME (ns) 40 TIME (ns) 40 TIME (ns) 40 tON(MIN) 30 30 30 tON(MIN) 20 20 20 10 VIN = 38V 10 VOUT = 0.6V 10 VIN = 38V f ≈ 2000kHz f ≈ 2000kHz VOUT = 0.6V 0 0 0 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 40 200 500 800 1100 1400 1700 2000 VOUT (V) VIN (V) FREQUENCY (kHz) 3833 G19 3833 G20 3833 G21
Error Amplifier Transconductance Current Sense Voltage Maximum Current Sense Voltage vs Temperature vs ITH Voltage vs Temperature
1.80 120 120 100 1.75 100 VRNG = 2V 80 1.70 60 80 40 1.65 60 20 VRNG = 1V 1.60 0 V 40 RNG = 0.6V VRNG = 0.6V V TRANSCONDUCTANCE (mS) –20 RNG = 0.9V 1.55 CURRENT SENSE VOLTAGE (mV) VRNG = 1.3V 20 –40 VRNG = 1.6V VRNG = 2.0V MAXIMUM CURRENT SENSE VOLTAGE (mV) 1.50 –60 0 –50 –25 0 25 50 75 100 125 150 0 0.5 1 1.5 2 2.5 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) ITH VOLTAGE (V) TEMPERATURE (°C) 3833 G22 3833 G23 3833 G24
Input Undervoltage Lockout RUN and TRACK/SS Pull-Up RUN Thresholds vs Temperature Thresholds vs Temperature Currents vs Temperature
1.6 4.5 1.8 1.4 SWITCHING REGION 4.3 UVLO RELEASE 1.6 (INTV 1.2 CC RISING) RUN 4.1 1.4 1.0 STANDBY REGION 0.8 3.9 1.2 0.6 UVLO LOCK TRACK/SS 3.7 (INTV CURRENT (µA) CC FALLING) 1.0 RUN PIN THRESHOLDS (V) 0.4 SHUTDOWN REGION UVLO THRESHOLDS (V) 3.5 0.8 0.2 0 3.3 0.6 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3833 G25 3833 G26 3833 G27 3833f 7
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) tON(MIN) and tOFF(MIN) vs Voltage on VOUT Pin vs Voltage on VIN Pin vs Switching Frequency
100 100 100 90 90 tOFF(MIN) 90 tOFF(MIN) 80 tOFF(MIN) 80 80 70 70 70 60 60 60 50 50 t 50 ON(MIN) TIME (ns) 40 TIME (ns) 40 TIME (ns) 40 tON(MIN) 30 30 30 tON(MIN) 20 20 20 10 VIN = 38V 10 VOUT = 0.6V 10 VIN = 38V f ≈ 2000kHz f ≈ 2000kHz VOUT = 0.6V 0 0 0 0 1 2 3 4 5 6 0 5 10 15 20 25 30 35 40 200 500 800 1100 1400 1700 2000 VOUT (V) VIN (V) FREQUENCY (kHz) 3833 G19 3833 G20 3833 G21
Error Amplifier Transconductance Current Sense Voltage Maximum Current Sense Voltage vs Temperature vs ITH Voltage vs Temperature
1.80 120 120 100 1.75 100 VRNG = 2V 80 1.70 60 80 40 1.65 60 20 VRNG = 1V 1.60 0 V 40 RNG = 0.6V VRNG = 0.6V V TRANSCONDUCTANCE (mS) –20 RNG = 0.9V 1.55 CURRENT SENSE VOLTAGE (mV) VRNG = 1.3V 20 –40 VRNG = 1.6V VRNG = 2.0V MAXIMUM CURRENT SENSE VOLTAGE (mV) 1.50 –60 0 –50 –25 0 25 50 75 100 125 150 0 0.5 1 1.5 2 2.5 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) ITH VOLTAGE (V) TEMPERATURE (°C) 3833 G22 3833 G23 3833 G24
Input Undervoltage Lockout RUN and TRACK/SS Pull-Up RUN Thresholds vs Temperature Thresholds vs Temperature Currents vs Temperature
1.6 4.5 1.8 1.4 SWITCHING REGION 4.3 UVLO RELEASE 1.6 (INTV 1.2 CC RISING) RUN 4.1 1.4 1.0 STANDBY REGION 0.8 3.9 1.2 0.6 UVLO LOCK TRACK/SS 3.7 (INTV CURRENT (µA) CC FALLING) 1.0 RUN PIN THRESHOLDS (V) 0.4 SHUTDOWN REGION UVLO THRESHOLDS (V) 3.5 0.8 0.2 0 3.3 0.6 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3833 G25 3833 G26 3833 G27 3833f 7