Datasheet LT8710 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | Synchronous SEPIC/Inverting/Boost Controller with Output Current Control |
| Pages / Page | 44 / 7 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 657 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. DCM Thresholds (ISP-ISN)
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LT8710
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. DCM Thresholds (ISP-ISN) Power Good Thresholds (FBX) C/10 Thresholds (ISP-ISN)
6 –280 1.16 140 14 1.15 130 5 –290 12 MODE = 0V, FCM 1.14 RISING 120 RISING NEGA 10 4 –300 ISP-ISN (mV) 1.13 110 TIVE FBX (V) 8 3 –310 1.12 100 6 FALLING ISP-ISN (mV) MODE = 2V, DCM 1.11 90 2 –320 POSITIVE FBX (V) 4 1.10 FALLING 80 AVERAGE ISP-ISN (mV) 1 –330 1.09 70 2 0 –340 1.08 60 0 –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) 8710 G10 8710 G11 8710 G12
EN/FBIN Chip Enable and Active MODE Forced CCM Thresholds Mode Thresholds EN/FBIN Pin Current
1.24 1.40 1.75 35 –40°C 1.23 1.38 1.73 30 25°C 125°C 1.22 RISING, EXIT FCM 1.36 RISING ONLY 1.71 EN/FBIN ACTIVE MODE (V) 25 1.21 1.34 1.69 1.20 1.32 1.67 20 RISING 1.19 1.30 1.65 15 MODE (V) 1.18 1.28 1.63 1.17 FALLING, ENTER FCM 1.26 1.61 10 EN/FBIN CHIP ENABLE (V) EN/FBIN PIN CURRENT (µA) 1.16 1.24 FALLING 1.59 5 1.15 1.22 1.57 0 1.14 1.20 1.55 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 EN/FBIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8710 G15 8710 G13 8710 G14
Oscillator Frequency vs Oscillator Frequency During Temperature Soft-Start BG and TG Transition Time
) 900 NOM 1 80 /F BG RISING 800 SW 70 BG FALLING TG RISING 700 RT = 46.4kΩ 60 TG FALLING 600 50 500 (kHz) 1/2 40 400 TOR FREQUENCY (F f OSC 300 1/3 30 1/4 200 TRANSITION TIME (ns) 1/5 20 RT = 357kΩ 100 INVERTING NONINVERTING 10 CONFIGURATIONS CONFIGURATIONS 0 0 –50 –25 0 25 50 75 100 125 NORMALIZED OSCILLA 0 0.2 0.4 0.6 0.8 1 1.2 0 0 2 4 6 8 10 TEMPERATURE (°C) FBX VOLTAGE (V) 8710 G16 8710 G17 CAP LOAD (nF) 8710 G18 8710f For more information www.linear.com/LT8710 7
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. DCM Thresholds (ISP-ISN) Power Good Thresholds (FBX) C/10 Thresholds (ISP-ISN)
6 –280 1.16 140 14 1.15 130 5 –290 12 MODE = 0V, FCM 1.14 RISING 120 RISING NEGA 10 4 –300 ISP-ISN (mV) 1.13 110 TIVE FBX (V) 8 3 –310 1.12 100 6 FALLING ISP-ISN (mV) MODE = 2V, DCM 1.11 90 2 –320 POSITIVE FBX (V) 4 1.10 FALLING 80 AVERAGE ISP-ISN (mV) 1 –330 1.09 70 2 0 –340 1.08 60 0 –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) 8710 G10 8710 G11 8710 G12
EN/FBIN Chip Enable and Active MODE Forced CCM Thresholds Mode Thresholds EN/FBIN Pin Current
1.24 1.40 1.75 35 –40°C 1.23 1.38 1.73 30 25°C 125°C 1.22 RISING, EXIT FCM 1.36 RISING ONLY 1.71 EN/FBIN ACTIVE MODE (V) 25 1.21 1.34 1.69 1.20 1.32 1.67 20 RISING 1.19 1.30 1.65 15 MODE (V) 1.18 1.28 1.63 1.17 FALLING, ENTER FCM 1.26 1.61 10 EN/FBIN CHIP ENABLE (V) EN/FBIN PIN CURRENT (µA) 1.16 1.24 FALLING 1.59 5 1.15 1.22 1.57 0 1.14 1.20 1.55 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 EN/FBIN VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 8710 G15 8710 G13 8710 G14
Oscillator Frequency vs Oscillator Frequency During Temperature Soft-Start BG and TG Transition Time
) 900 NOM 1 80 /F BG RISING 800 SW 70 BG FALLING TG RISING 700 RT = 46.4kΩ 60 TG FALLING 600 50 500 (kHz) 1/2 40 400 TOR FREQUENCY (F f OSC 300 1/3 30 1/4 200 TRANSITION TIME (ns) 1/5 20 RT = 357kΩ 100 INVERTING NONINVERTING 10 CONFIGURATIONS CONFIGURATIONS 0 0 –50 –25 0 25 50 75 100 125 NORMALIZED OSCILLA 0 0.2 0.4 0.6 0.8 1 1.2 0 0 2 4 6 8 10 TEMPERATURE (°C) FBX VOLTAGE (V) 8710 G16 8710 G17 CAP LOAD (nF) 8710 G18 8710f For more information www.linear.com/LT8710 7
