Datasheet LTC7802 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum |
| 页数 / 页 | 34 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 3.1 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LTC7802
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C, VIN = 12V, RUN1,2 > 1.25V, EXTVCC = 0V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply (VIN)
VIN Input Supply Operating Range 4.5 40 V IVIN VIN Current in Regulation Front Page Circuit, 14V to 3.3V, 14 µA No Load, RUN2 = 0V
Controller Operation
VOUT1,2 Output Voltage Operating Range 0.8 40 V VFB1,2 Regulated Feedback Voltage (Note 4) VIN = 4.5V to 40V, ITH1,2 Voltage = 0.6V to 1.2V l 0.788 0.800 0.812 V 0°C to 85°C, All Grades 0.792 0.800 0.808 V Feedback Current ±5 ±50 nA Feedback Overvoltage Protection Threshold Measured at VFB1,2 Relative to 7 10 13 % Regulated VFB1,2 gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA 1.8 mmho VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1,2– = 3.3V l 45 50 55 mV Matching Between Channels VSENSE1,2– = 3.3V –3.5 0 3.5 mV ISENSE1,2+ SENSE1, 2+ Pin Current VSENSE1,2+ = 3.3V ±1 µA ISENSE1– SENSE1– Pin Current VSENSE1– ≤ 2.8V 1 µA 3.2V ≤ VSENSE1– < INTVCC – 0.5V 50 µA VSENSE1– > INTVCC + 0.5V 700 µA ISENSE2– SENSE2– Pin Current VSENSE2– = 3.3V ±2 µA VSENSE2– > INTVCC + 0.5V 650 µA Soft-Start Charge Current VTRACK/SS1,2 = 0V 10 12.5 15 µA RUN Pin ON Threshold VRUN1,2 Rising l 1.15 1.20 1.25 V RUN Pin Hysteresis 100 mV
DC Supply Current (Note 5)
VIN Shutdown Current RUN1,2 = 0V 1.5 µA VIN Sleep Mode Current VSENSE1– < 3.2V, EXTVCC = 0V One Channel On 15 24 µA Both Channels On 18 30 µA Sleep Mode Current (Note 3) VSENSE1– ≥ 3.2V Only Channel 1 On VIN Current, EXTVCC = 0V 5 9 µA VIN Current, EXTVCC ≥ 4.8V 1 4 µA EXTVCC Current, EXTVCC ≥ 4.8V 5 10 µA SENSE1– Current 10 18 µA Sleep Mode Current (Note 3) VSENSE1– ≥ 3.2V, EXTVCC ≥ 4.8V Both Channels On VIN Current 1 4 µA EXTVCC Current 7 14 µA SENSE1– Current 12 22 µA Pulse-Skipping or Forced Continuous Mode One Channel On 2 mA VIN or EXTVCC Current (Note 3) Both Channels On 3 mA Rev. 0 For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional 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, VIN = 12V, RUN1,2 > 1.25V, EXTVCC = 0V, unless otherwise noted. (Note 2) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply (VIN)
VIN Input Supply Operating Range 4.5 40 V IVIN VIN Current in Regulation Front Page Circuit, 14V to 3.3V, 14 µA No Load, RUN2 = 0V
Controller Operation
VOUT1,2 Output Voltage Operating Range 0.8 40 V VFB1,2 Regulated Feedback Voltage (Note 4) VIN = 4.5V to 40V, ITH1,2 Voltage = 0.6V to 1.2V l 0.788 0.800 0.812 V 0°C to 85°C, All Grades 0.792 0.800 0.808 V Feedback Current ±5 ±50 nA Feedback Overvoltage Protection Threshold Measured at VFB1,2 Relative to 7 10 13 % Regulated VFB1,2 gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA 1.8 mmho VSENSE(MAX) Maximum Current Sense Threshold VFB1,2 = 0.7V, VSENSE1,2– = 3.3V l 45 50 55 mV Matching Between Channels VSENSE1,2– = 3.3V –3.5 0 3.5 mV ISENSE1,2+ SENSE1, 2+ Pin Current VSENSE1,2+ = 3.3V ±1 µA ISENSE1– SENSE1– Pin Current VSENSE1– ≤ 2.8V 1 µA 3.2V ≤ VSENSE1– < INTVCC – 0.5V 50 µA VSENSE1– > INTVCC + 0.5V 700 µA ISENSE2– SENSE2– Pin Current VSENSE2– = 3.3V ±2 µA VSENSE2– > INTVCC + 0.5V 650 µA Soft-Start Charge Current VTRACK/SS1,2 = 0V 10 12.5 15 µA RUN Pin ON Threshold VRUN1,2 Rising l 1.15 1.20 1.25 V RUN Pin Hysteresis 100 mV
DC Supply Current (Note 5)
VIN Shutdown Current RUN1,2 = 0V 1.5 µA VIN Sleep Mode Current VSENSE1– < 3.2V, EXTVCC = 0V One Channel On 15 24 µA Both Channels On 18 30 µA Sleep Mode Current (Note 3) VSENSE1– ≥ 3.2V Only Channel 1 On VIN Current, EXTVCC = 0V 5 9 µA VIN Current, EXTVCC ≥ 4.8V 1 4 µA EXTVCC Current, EXTVCC ≥ 4.8V 5 10 µA SENSE1– Current 10 18 µA Sleep Mode Current (Note 3) VSENSE1– ≥ 3.2V, EXTVCC ≥ 4.8V Both Channels On VIN Current 1 4 µA EXTVCC Current 7 14 µA SENSE1– Current 12 22 µA Pulse-Skipping or Forced Continuous Mode One Channel On 2 mA VIN or EXTVCC Current (Note 3) Both Channels On 3 mA Rev. 0 For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts