Datasheet LT8709 (Analog Devices) - 6
| Manufacturer | Analog Devices |
| Description | Negative Input Synchronous Multi-Topology DC/DC Controller |
| Pages / Page | 48 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, all voltages relative to … |
| File Format / Size | PDF / 802 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, all voltages relative to –VIN. unless otherwise noted
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LT8709
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, all voltages relative to –VIN unless otherwise noted. Max Current Limit vs Duty Cycle Max Current Limit vs Temperature Max Current Limit vs SS (CSP - CSN) (CSP - CSN) (CSP - CSN)
60 –20 56 –26 60 fOSC = 300kHz 55 –25 MAX NEGA –28 MAX NEGA 54 50 50 –30 52 –30 40 45 –35 TIVE CSP-CSN (mV) TIVE CSP-CSN (mV) 40 –40 50 –32 30 35 –45 CSP-CSN (mV) 48 –34 20 30 –50 MAX POSITIVE CSP-CSN (mV) MAX POSITIVE CSP-CSN (mV) 46 –36 10 25 –55 20 –60 44 –38 0 0 10 20 30 40 50 60 70 80 90 100 –50 –25 0 25 50 75 100 125 0.0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 DUTY CYCLE (%) TEMPERATURE (°C) SS (V) 8709 G01 8709 G02 8709 G03
Positive and Negative Feedback Positive and Negative FBY Input Regulation Voltage vs Voltage vs Temperature Currents vs Temperature Temperature (EN/FBIN)
10 –1.220 86.0 86.0 NEGA 1.63 5 –1.225 85.5 85.5 TIVE FBY CURRENT OUT OF PIN (µA) NEGA 1.62 0 –1.230 85.0 85.0 TIVE FBY VOL 84.5 84.5 1.61 TAGE (mV) –5 –1.235 84.0 84.0 TAGE (V) –10 –1.240 1.60 83.5 83.5 T –1.245 AGE (V) –15 83.0 83.0 1.59 EN/FBIN VOL –20 –1.250 POSITIVE FBY VOL 82.5 82.5 1.58 –25 –1.255 POSITIVE FBY CURRENT INTO PIN (µA) 82.0 82.0 –30 –1.260 81.5 81.5 1.57 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8709 G04 8709 G05 8709 G06
Input Regulation Voltage vs FBY Current Sense Voltage vs Current Sense Voltage vs FBY (EN/FBIN) Temperature (ISP-ISN and IMON) (ISP-ISN and IMON)
2.0 57.5 1.2175 60 1.30 1.9 55.0 1.2150 55 1.25 IMON IMON 1.8 52.5 1.2125 50 1.20 IMON (V) IMON (V) AVE ISP-ISN 1.7 50.0 1.2100 45 1.15 EN/FBIN (V) AVE ISP-ISN 1.6 47.5 1.2075 40 1.10 AVERAGE ISP-ISN (mV) AVERAGE ISP-ISN (mV) 1.5 45.0 1.2050 35 1.05 1.4 42.5 1.2025 30 1.00 10 20 30 40 50 60 70 80 90 –50 –25 0 25 50 75 100 125 10 20 30 40 50 60 70 80 90 FBY CURRENT (µA) TEMPERATURE (°C) FBY CURRENT (µA) 8709 G07 8709 G08 8709 G09 8709fa 6 For more information www.linear.com/LT8709
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, all voltages relative to –VIN unless otherwise noted. Max Current Limit vs Duty Cycle Max Current Limit vs Temperature Max Current Limit vs SS (CSP - CSN) (CSP - CSN) (CSP - CSN)
60 –20 56 –26 60 fOSC = 300kHz 55 –25 MAX NEGA –28 MAX NEGA 54 50 50 –30 52 –30 40 45 –35 TIVE CSP-CSN (mV) TIVE CSP-CSN (mV) 40 –40 50 –32 30 35 –45 CSP-CSN (mV) 48 –34 20 30 –50 MAX POSITIVE CSP-CSN (mV) MAX POSITIVE CSP-CSN (mV) 46 –36 10 25 –55 20 –60 44 –38 0 0 10 20 30 40 50 60 70 80 90 100 –50 –25 0 25 50 75 100 125 0.0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 DUTY CYCLE (%) TEMPERATURE (°C) SS (V) 8709 G01 8709 G02 8709 G03
Positive and Negative Feedback Positive and Negative FBY Input Regulation Voltage vs Voltage vs Temperature Currents vs Temperature Temperature (EN/FBIN)
10 –1.220 86.0 86.0 NEGA 1.63 5 –1.225 85.5 85.5 TIVE FBY CURRENT OUT OF PIN (µA) NEGA 1.62 0 –1.230 85.0 85.0 TIVE FBY VOL 84.5 84.5 1.61 TAGE (mV) –5 –1.235 84.0 84.0 TAGE (V) –10 –1.240 1.60 83.5 83.5 T –1.245 AGE (V) –15 83.0 83.0 1.59 EN/FBIN VOL –20 –1.250 POSITIVE FBY VOL 82.5 82.5 1.58 –25 –1.255 POSITIVE FBY CURRENT INTO PIN (µA) 82.0 82.0 –30 –1.260 81.5 81.5 1.57 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8709 G04 8709 G05 8709 G06
Input Regulation Voltage vs FBY Current Sense Voltage vs Current Sense Voltage vs FBY (EN/FBIN) Temperature (ISP-ISN and IMON) (ISP-ISN and IMON)
2.0 57.5 1.2175 60 1.30 1.9 55.0 1.2150 55 1.25 IMON IMON 1.8 52.5 1.2125 50 1.20 IMON (V) IMON (V) AVE ISP-ISN 1.7 50.0 1.2100 45 1.15 EN/FBIN (V) AVE ISP-ISN 1.6 47.5 1.2075 40 1.10 AVERAGE ISP-ISN (mV) AVERAGE ISP-ISN (mV) 1.5 45.0 1.2050 35 1.05 1.4 42.5 1.2025 30 1.00 10 20 30 40 50 60 70 80 90 –50 –25 0 25 50 75 100 125 10 20 30 40 50 60 70 80 90 FBY CURRENT (µA) TEMPERATURE (°C) FBY CURRENT (µA) 8709 G07 8709 G08 8709 G09 8709fa 6 For more information www.linear.com/LT8709
