Datasheet LTC7852 (Analog Devices) - 4
| Hersteller | Analog Devices |
| Beschreibung | Dual Output, 6-Phase, Multiphase Current Mode Synchronous Controller with Current Monitoring |
| Seiten / Seite | 32 / 4 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Revision | A |
| Dateiformat / Größe | PDF / 1.4 Mb |
| Dokumentensprache | Englisch |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
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LTC7852/LTC7852-1
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VCC Minimum Bias Supply Input 4.5 V VOUT Output Voltage Range LTC7852 Only (Note 2) l 2.0 V V + OSNS Regulated Feedback Voltage ITH = 1.2V (Note 4) –40°C to 125°C l 496 500 504 mV 0°C to 85°C l 498 500 502 mV I + OSNS Feedback Current –100 nA VREFLNREG Reference Voltage Line Reg. VCC = 4.5V to 5.5V 0.1 % VLOADREG Output Voltage Load ΔITH = 0.7V to 1.2V l 0.01 0.1 % Regulation ΔITH = 1.2V to 1.6V l 0.01 0.1 % gm1,2 Transconductance Amplifier ITH =1.7V, Sink/Source 10µA 2.75 mmho gm f0dB Differential Amplifier Unity- (Note 5) 4 MHz Gain Crossover Frequency V + OVL Feedback Overvoltage Lockout Measured at VOSNS l 5 7.5 10 % IQ Input DC Supply Current Normal Mode 15 mA Shutdown VRUN = 0V 1.2 mA UVLO Undervoltage Lockout VVCC Falling 3.6 4.0 4.3 V UVLOHYS UVLO Hysteresis 200 mV ISNSAVG Sense Pin Bias Currents VSNSAVG = 1.0V LTC7852 Only l ±30 nA ISNSP Sense Pin Bias Currents LTC7852 SNSP = 1.0V l ±50 nA LTC7852-1 SNSP = 1.5V ISS Soft-Start Charge Current VSS = 0V –4.5 –5 –5.5 µA VSNSN Sense Pin Bias Voltage –3mA < ISNSN < 3mA 1.5 V LTC7852-1 Only AVT_SNS Total Sense Signal Gain to LTC7852 Only 5 V/V Current Comparator VRUN RUN Pin ON Threshold VRUN Rising l 1.1 1.22 1.34 V VRUN_HYS RUN Pin ON Hysteresis 140 mV IRUN RUN Pin Pull-Up Current RUN < ON Threshold RUN < 1.1V –1.3 µA RUN > ON Threshold RUN > 1.34V –7.7 µA VSENSE(MAX) Maximum Current Sense LTC7852 Threshold ITH = 2.2V, VSNSN =1.0V VSNSAVG = VSNSN ILIM = 0V l 9 10 11 mV ILIM = 1/4VCC l 14 15 16 mV ILIM = Float l 19 20 21 mV ILIM = 3/4VCC l 24 25 26 mV ILIM = VCC l 28.5 30 31.5 mV LTC7852-1 ITH = 2.2V ILIM = 0V l 45 50 55 mV ILIM = 1/4Vcc l 70 75 80 mV ILIM = Float l 95 100 105 mV ILIM = 3/4VCC l 120 125 130 mV ILIM = VCC l 142.5 150 157.5 mV VØMIS Standard Phase to Phase Current ILIM = Float, PHCFG = Float 0.5 mV Deviation of Sensed Voltage Mismatching ITH = 2.2V tON(MIN) Minimum On-Time (Note 6) 40 ns Rev A 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = VRUN = 5V unless otherwise specified. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VCC Minimum Bias Supply Input 4.5 V VOUT Output Voltage Range LTC7852 Only (Note 2) l 2.0 V V + OSNS Regulated Feedback Voltage ITH = 1.2V (Note 4) –40°C to 125°C l 496 500 504 mV 0°C to 85°C l 498 500 502 mV I + OSNS Feedback Current –100 nA VREFLNREG Reference Voltage Line Reg. VCC = 4.5V to 5.5V 0.1 % VLOADREG Output Voltage Load ΔITH = 0.7V to 1.2V l 0.01 0.1 % Regulation ΔITH = 1.2V to 1.6V l 0.01 0.1 % gm1,2 Transconductance Amplifier ITH =1.7V, Sink/Source 10µA 2.75 mmho gm f0dB Differential Amplifier Unity- (Note 5) 4 MHz Gain Crossover Frequency V + OVL Feedback Overvoltage Lockout Measured at VOSNS l 5 7.5 10 % IQ Input DC Supply Current Normal Mode 15 mA Shutdown VRUN = 0V 1.2 mA UVLO Undervoltage Lockout VVCC Falling 3.6 4.0 4.3 V UVLOHYS UVLO Hysteresis 200 mV ISNSAVG Sense Pin Bias Currents VSNSAVG = 1.0V LTC7852 Only l ±30 nA ISNSP Sense Pin Bias Currents LTC7852 SNSP = 1.0V l ±50 nA LTC7852-1 SNSP = 1.5V ISS Soft-Start Charge Current VSS = 0V –4.5 –5 –5.5 µA VSNSN Sense Pin Bias Voltage –3mA < ISNSN < 3mA 1.5 V LTC7852-1 Only AVT_SNS Total Sense Signal Gain to LTC7852 Only 5 V/V Current Comparator VRUN RUN Pin ON Threshold VRUN Rising l 1.1 1.22 1.34 V VRUN_HYS RUN Pin ON Hysteresis 140 mV IRUN RUN Pin Pull-Up Current RUN < ON Threshold RUN < 1.1V –1.3 µA RUN > ON Threshold RUN > 1.34V –7.7 µA VSENSE(MAX) Maximum Current Sense LTC7852 Threshold ITH = 2.2V, VSNSN =1.0V VSNSAVG = VSNSN ILIM = 0V l 9 10 11 mV ILIM = 1/4VCC l 14 15 16 mV ILIM = Float l 19 20 21 mV ILIM = 3/4VCC l 24 25 26 mV ILIM = VCC l 28.5 30 31.5 mV LTC7852-1 ITH = 2.2V ILIM = 0V l 45 50 55 mV ILIM = 1/4Vcc l 70 75 80 mV ILIM = Float l 95 100 105 mV ILIM = 3/4VCC l 120 125 130 mV ILIM = VCC l 142.5 150 157.5 mV VØMIS Standard Phase to Phase Current ILIM = Float, PHCFG = Float 0.5 mV Deviation of Sensed Voltage Mismatching ITH = 2.2V tON(MIN) Minimum On-Time (Note 6) 40 ns Rev A 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Block Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts