Datasheet LTC7802-3.3 (Analog Devices) - 3
| Hersteller | Analog Devices |
| Beschreibung | 40V Low IQ, 3MHz Dual, 2-Phase Synchronous Step-Down Controller with Spread Spectrum |
| Seiten / Seite | 34 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Dateiformat / Größe | PDF / 1.5 Mb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the full operating
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LTC7802-3.3
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, 12 µA No Load, RUN2 = 0V
Controller Operation
VOUT2 Channel 2 Output Voltage Operating Range 0.8 40 V VOUT1 Channel 1 Regulated Output Voltage (Note 4) VIN = 4.5V to 40V, ITH1 Voltage = 0.6V to 1.2V l 3.25 3.3 3.35 V VFB2 Channel 2 Regulated Feedback Voltage (Note 4) VIN = 4.5V to 40V, ITH2 Voltage = 0.6V to 1.2V l 0.788 0.800 0.812 V Feedback Current Channel 1 1 µA Channel 2 ±5 ±50 nA Feedback Overvoltage Protection Threshold Measured at VOUT1, VFB2 Relative to 7 10 13 % Regulated VOUT1, VFB2 gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA 1.8 mmho VSENSE(MAX) Maximum Current Sense Threshold VOUT1 = 2.9V, VFB2 = 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– = 3.3V 50 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 15 24 µA Only Channel 2 On Sleep Mode Current (Note 3) VIN Current, EXTVCC = 0V 5 9 µA Only Channel 1 On 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) 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 (Notes 3, 5) 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, 12 µA No Load, RUN2 = 0V
Controller Operation
VOUT2 Channel 2 Output Voltage Operating Range 0.8 40 V VOUT1 Channel 1 Regulated Output Voltage (Note 4) VIN = 4.5V to 40V, ITH1 Voltage = 0.6V to 1.2V l 3.25 3.3 3.35 V VFB2 Channel 2 Regulated Feedback Voltage (Note 4) VIN = 4.5V to 40V, ITH2 Voltage = 0.6V to 1.2V l 0.788 0.800 0.812 V Feedback Current Channel 1 1 µA Channel 2 ±5 ±50 nA Feedback Overvoltage Protection Threshold Measured at VOUT1, VFB2 Relative to 7 10 13 % Regulated VOUT1, VFB2 gm1,2 Transconductance Amplifier gm (Note 4) ITH1,2 = 1.2V, Sink/Source = 5μA 1.8 mmho VSENSE(MAX) Maximum Current Sense Threshold VOUT1 = 2.9V, VFB2 = 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– = 3.3V 50 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 15 24 µA Only Channel 2 On Sleep Mode Current (Note 3) VIN Current, EXTVCC = 0V 5 9 µA Only Channel 1 On 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) 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 (Notes 3, 5) 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