Datasheet LT3495, LT3495B, LT3495-1, LT3495B-1 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 650mA Micropower Low Noise Boost Converter with Output Disconnect |
| 页数 / 页 | 16 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 647 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LT3495/LT3495B/ LT3495-1/LT3495B-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch Current Limit LT3495-1/LT3495B-1 l 275 350 450 mA Switch VCESAT LT3495/LT3495B, ISW = 400mA 200 mV LT3495-1/LT3495B-1, ISW = 200mA 125 mV Switch Leakage Current VSW = 5V 0.01 1 µA PMOS Disconnect Current Limit After Start-Up 250 370 450 mA During Start-Up 110 150 190 mA PMOS Disconnect VCAP – VOUT IOUT = 50mA, VCAP = 15V 150 mV VCAP – VOUT Clamp Voltage 8.7 V SHDN Input Voltage High 1.5 V SHDN Input Voltage Low 0.3 V SHDN Pin Bias Current VSHDN = 3V 5.3 8 µA VSHDN = 0V 0 µA CTRL Pin Bias Current VCTRL = 0.5V, Current Flows Out of Pin l 20 100 nA CTRL to FB Offset VCTRL = 0.5V 6 14 mV Maximum Shunt Current LT3495/LT3495-1, VFB = 1.5V 230 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Internal reference voltage is determined by finding VFB voltage may cause permanent damage to the device. Exposure to any Absolute level which causes quiescent current to increase 150µA above “Not Maximum Rating condition for extended periods may affect device Switching” level. reliability and lifetime.
Note 4:
If CTRL is overriding the internal reference, Start-Up mode occurs
Note 2:
The LT3495/LT3495B/LT3495-1/LT3495B-1 are guaranteed to when VFB is less then half the voltage on CTRL. If CTRL is not overriding meet performance specifications from 0°C to 125°C junction temperature. the internal reference, Start-Up mode occurs when VFB is less then half the Specifications over the –40°C to 125°C operating junction temperature voltage of the internal reference. range are assured by design, characterization and correlation with statistical process controls.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Switching Frequency vs Load Current Load Regulation VOUT vs CTRL Voltage
1000 1.5 18 VCC = 3.6V VCC = 3.6V FIGURE 7 CIRCUIT VOUT = 16V VOUT = 16V FIGURE 7 CIRCUIT 1.0 15 800 FIGURE 7 CIRCUIT 0.5 12 600 0.0 TAGE (V) 9 VOL 400 TAGE CHANGE (%) VOL –0.5 V OUT 6 SWITCHING FREQUENCY (kHz) 200 V OUT –1.0 3 0 –1.5 0 0 20 40 60 80 100 120 0 20 40 60 80 100 120 0 0.3 0.6 0.9 1.2 1.5 LOAD CURRENT (mA) LOAD CURRENT (mA) CTRL VOLTAGE (V) 3495 G01 3495 G02 3495 G03 3495b1b1fa 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Infomation Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 3V, VSHDN = VCC, unless otherwise noted. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS
Switch Current Limit LT3495-1/LT3495B-1 l 275 350 450 mA Switch VCESAT LT3495/LT3495B, ISW = 400mA 200 mV LT3495-1/LT3495B-1, ISW = 200mA 125 mV Switch Leakage Current VSW = 5V 0.01 1 µA PMOS Disconnect Current Limit After Start-Up 250 370 450 mA During Start-Up 110 150 190 mA PMOS Disconnect VCAP – VOUT IOUT = 50mA, VCAP = 15V 150 mV VCAP – VOUT Clamp Voltage 8.7 V SHDN Input Voltage High 1.5 V SHDN Input Voltage Low 0.3 V SHDN Pin Bias Current VSHDN = 3V 5.3 8 µA VSHDN = 0V 0 µA CTRL Pin Bias Current VCTRL = 0.5V, Current Flows Out of Pin l 20 100 nA CTRL to FB Offset VCTRL = 0.5V 6 14 mV Maximum Shunt Current LT3495/LT3495-1, VFB = 1.5V 230 µA
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 3:
Internal reference voltage is determined by finding VFB voltage may cause permanent damage to the device. Exposure to any Absolute level which causes quiescent current to increase 150µA above “Not Maximum Rating condition for extended periods may affect device Switching” level. reliability and lifetime.
Note 4:
If CTRL is overriding the internal reference, Start-Up mode occurs
Note 2:
The LT3495/LT3495B/LT3495-1/LT3495B-1 are guaranteed to when VFB is less then half the voltage on CTRL. If CTRL is not overriding meet performance specifications from 0°C to 125°C junction temperature. the internal reference, Start-Up mode occurs when VFB is less then half the Specifications over the –40°C to 125°C operating junction temperature voltage of the internal reference. range are assured by design, characterization and correlation with statistical process controls.
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Switching Frequency vs Load Current Load Regulation VOUT vs CTRL Voltage
1000 1.5 18 VCC = 3.6V VCC = 3.6V FIGURE 7 CIRCUIT VOUT = 16V VOUT = 16V FIGURE 7 CIRCUIT 1.0 15 800 FIGURE 7 CIRCUIT 0.5 12 600 0.0 TAGE (V) 9 VOL 400 TAGE CHANGE (%) VOL –0.5 V OUT 6 SWITCHING FREQUENCY (kHz) 200 V OUT –1.0 3 0 –1.5 0 0 20 40 60 80 100 120 0 20 40 60 80 100 120 0 0.3 0.6 0.9 1.2 1.5 LOAD CURRENT (mA) LOAD CURRENT (mA) CTRL VOLTAGE (V) 3495 G01 3495 G02 3495 G03 3495b1b1fa 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Infomation Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts