Datasheet LTC7852 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | Dual Output, 6-Phase, Multiphase Current Mode Synchronous Controller with Current Monitoring |
| Seiten / Seite | 32 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VCC = 5V unless otherwise … |
| Revision | A |
| Dateiformat / Größe | PDF / 1.4 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VCC = 5V unless otherwise noted. Maximum Current Sense Threshold
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LTC7852/LTC7852-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VCC = 5V unless otherwise noted. Maximum Current Sense Threshold Current Sense Threshold FREQ Pin Source Current vs Common Mode Voltage vs ITH Voltage vs Temperature
35.0 160 20.5 I I LIM = VCC 140 LIM = 0 20.4 30.0 ILIM = 1/4 VCC 120 I 20.3 I LIM = 1/2 VCC LIM = 3/4 VCC 25.0 ILIM = 3/4 VCC 100 I 20.2 LIM = VCC ILIM = 1/2 VCC 20.0 80 20.1 I 60 20.0 LIM = 1/4 VCC 15.0 40 19.9 ILIM = 0 10.0 20 19.8 FREQ PIN CURRENT (µA) 0 19.7 5.0 CURRENT SENSE THRESHOLD (mV) CURRENT SENSE THRESHOLD (mV) –20 19.6 0 –40 19.5 0 0.5 1 1.5 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0 2.2 –50 –25 0 25 50 75 100 125 150 VSENSE COMMON MODE VOLTAGE (V) VITH (V) TEMPERATURE (°C) 7852 G01 7852 G02 7852 G03
Oscillator Frequency Load Step vs Temperature Prebias Startup at 0.5V
1800 V V FREQ = VCC OUT RUN PIN AC–COUPLED 1600 2V/DIV 50mV/DIV 1400 1200 OUTPUT I 200mV/DIV L1, IL2 5A/DIV 1000 800 VFREQ = 0.95V SS VOLTAGE TOR FREQUENCY (kHz) 200mV/DIV I 600 LOAD 30A TO 45A PGOOD 400 5V/DIV 20µs/DIV 7852 G04 OSCILLA V 7852 G06 FREQ = GND 500µs/DIV 200 VIN = 12V VOUT = 1V 0 fSW = 400kHz –50 –25 0 25 50 75 100 125 150 L = 0.25µH TEMPERATURE (°C) 7852 G05 Rev A 6 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
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VCC = 5V unless otherwise noted. Maximum Current Sense Threshold Current Sense Threshold FREQ Pin Source Current vs Common Mode Voltage vs ITH Voltage vs Temperature
35.0 160 20.5 I I LIM = VCC 140 LIM = 0 20.4 30.0 ILIM = 1/4 VCC 120 I 20.3 I LIM = 1/2 VCC LIM = 3/4 VCC 25.0 ILIM = 3/4 VCC 100 I 20.2 LIM = VCC ILIM = 1/2 VCC 20.0 80 20.1 I 60 20.0 LIM = 1/4 VCC 15.0 40 19.9 ILIM = 0 10.0 20 19.8 FREQ PIN CURRENT (µA) 0 19.7 5.0 CURRENT SENSE THRESHOLD (mV) CURRENT SENSE THRESHOLD (mV) –20 19.6 0 –40 19.5 0 0.5 1 1.5 2 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2.0 2.2 –50 –25 0 25 50 75 100 125 150 VSENSE COMMON MODE VOLTAGE (V) VITH (V) TEMPERATURE (°C) 7852 G01 7852 G02 7852 G03
Oscillator Frequency Load Step vs Temperature Prebias Startup at 0.5V
1800 V V FREQ = VCC OUT RUN PIN AC–COUPLED 1600 2V/DIV 50mV/DIV 1400 1200 OUTPUT I 200mV/DIV L1, IL2 5A/DIV 1000 800 VFREQ = 0.95V SS VOLTAGE TOR FREQUENCY (kHz) 200mV/DIV I 600 LOAD 30A TO 45A PGOOD 400 5V/DIV 20µs/DIV 7852 G04 OSCILLA V 7852 G06 FREQ = GND 500µs/DIV 200 VIN = 12V VOUT = 1V 0 fSW = 400kHz –50 –25 0 25 50 75 100 125 150 L = 0.25µH TEMPERATURE (°C) 7852 G05 Rev A 6 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