Datasheet LT6654BX (Analog Devices) - 10
| 制造商 | Analog Devices |
| 描述 | 175°C, Wide Supply 2.5V Precision Voltage Reference |
| 页数 / 页 | 14 / 10 — APPLICATIONS INFORMATION. Figure 16. Maximum Allowed Output Regulated … |
| 文件格式/大小 | PDF / 1.2 Mb |
| 文件语言 | 英语 |
APPLICATIONS INFORMATION. Figure 16. Maximum Allowed Output Regulated Current, Sourcing. Hysteresis
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link to page 10 link to page 10 link to page 11 LT6654BX
APPLICATIONS INFORMATION
TA = 175° C, the maximum sourcing regulated output 12 current is at least 2mA. At 25°C, when operated within its specified limits of V 10 IN = 36V and sourcing 10mA, the LT6654BX-2.5 consumes about 356mW. Care must be 8 taken when designing the circuit so that the maximum junction temperature is not exceeded. For best perfor- 6 mance, junction temperature should be kept below 175°C. 4 LT6654BX has no thermal protection. This allows the part OUTPUT CURRENT (mA) to operate at very high temperatures. Nevertheless the 2 VIN = 5V V maximum power dissipation should not to be exceeded IN = 18V VIN = 36V in any conditions. Changes in performance may occur as 0105 115 125 135 145 155 165 175 a result of operation at high temperature. TEMPERATURE (°C) 6654BX F16 0.6
Figure 16. Maximum Allowed Output Regulated Current, Sourcing
0.5
Hysteresis
0.4 The hysteresis data is shown in Figure 17 and 18. Figure 17 shows statistical hysteresis data according to 0.3 the Note 12 of the EC table, while Figure 18 shows typical POWER (W) 0.2 continuous hysteresis for three parts from 25°C to 175°C to 25°C. The LT6654BX is capable of dissipating relatively 0.1 high power. For example, with a 36V input voltage and 0 10mA source current applied to the LT6654BX-2.5, the 105 115 125 135 145 155 165 175 power dissipation is PD = 348mW, which increases the TEMPERATURE (°C) 6654BX F14 die temperature by 105°C. This could raise the junction
Figure 14. Maximum Al owed Power Dissipation for the LT6654BX
temperature above 175°C and may cause the output to shift due to thermal hysteresis. 0.30 IOUT = 0A I 80 SOURCE = 3mA 0.25 25°C TO –40°C TO 25°C ISOURCE = 7mA AND 25°C TO 175°C TO 25°C I 70 SINK = 10mA 0.20 60 50 0.15 POWER (W) 40 0.10 30 NUMBER OF UNITS 0.05 20 10 0 3 8 13 18 23 28 33 38 0 INPUT VOLTAGE (V) –100 –75 –50 –25 0 25 50 75 100 6654BX F15 DISTRIBUTION (ppm) 6654BX F17
Figure 15. Typical Power Dissipation of the LT6654BX Figure 17. LT6654BX MS8 Thermal Hysteresis, –40°C and 175°C
Rev. 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Typical Application Related Parts
APPLICATIONS INFORMATION
TA = 175° C, the maximum sourcing regulated output 12 current is at least 2mA. At 25°C, when operated within its specified limits of V 10 IN = 36V and sourcing 10mA, the LT6654BX-2.5 consumes about 356mW. Care must be 8 taken when designing the circuit so that the maximum junction temperature is not exceeded. For best perfor- 6 mance, junction temperature should be kept below 175°C. 4 LT6654BX has no thermal protection. This allows the part OUTPUT CURRENT (mA) to operate at very high temperatures. Nevertheless the 2 VIN = 5V V maximum power dissipation should not to be exceeded IN = 18V VIN = 36V in any conditions. Changes in performance may occur as 0105 115 125 135 145 155 165 175 a result of operation at high temperature. TEMPERATURE (°C) 6654BX F16 0.6
Figure 16. Maximum Allowed Output Regulated Current, Sourcing
0.5
Hysteresis
0.4 The hysteresis data is shown in Figure 17 and 18. Figure 17 shows statistical hysteresis data according to 0.3 the Note 12 of the EC table, while Figure 18 shows typical POWER (W) 0.2 continuous hysteresis for three parts from 25°C to 175°C to 25°C. The LT6654BX is capable of dissipating relatively 0.1 high power. For example, with a 36V input voltage and 0 10mA source current applied to the LT6654BX-2.5, the 105 115 125 135 145 155 165 175 power dissipation is PD = 348mW, which increases the TEMPERATURE (°C) 6654BX F14 die temperature by 105°C. This could raise the junction
Figure 14. Maximum Al owed Power Dissipation for the LT6654BX
temperature above 175°C and may cause the output to shift due to thermal hysteresis. 0.30 IOUT = 0A I 80 SOURCE = 3mA 0.25 25°C TO –40°C TO 25°C ISOURCE = 7mA AND 25°C TO 175°C TO 25°C I 70 SINK = 10mA 0.20 60 50 0.15 POWER (W) 40 0.10 30 NUMBER OF UNITS 0.05 20 10 0 3 8 13 18 23 28 33 38 0 INPUT VOLTAGE (V) –100 –75 –50 –25 0 25 50 75 100 6654BX F15 DISTRIBUTION (ppm) 6654BX F17
Figure 15. Typical Power Dissipation of the LT6654BX Figure 17. LT6654BX MS8 Thermal Hysteresis, –40°C and 175°C
Rev. 0 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Package Description Typical Application Related Parts