Datasheet LTC1702A (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Dual 550kHz Synchronous 2-Phase Switching Regulator Controller |
| Pages / Page | 36 / 4 — TYPICAL PERFOR A CE CHARACTERISTICS. MOSFET Driver Supply Current. … |
| File Format / Size | PDF / 427 Kb |
| Document Language | English |
TYPICAL PERFOR A CE CHARACTERISTICS. MOSFET Driver Supply Current. Efficiency vs Load Current. Transient Response
Model Line for this Datasheet
Text Version of Document
LTC1702A
W U TYPICAL PERFOR A CE CHARACTERISTICS MOSFET Driver Supply Current Efficiency vs Load Current Transient Response vs Gate Capacitance
100 35 VIN = 5V VIN = 5V TEST CIRCUIT 1 VOUT = 3.3V VOUT = 1.8V ONE DRIVER LOADED 30 ILOAD = 0A-10A-0A MULTIPLY BY # OF ACTIVE ±2.2% MAX DEVIATION DRIVERS TO OBTAIN TOTAL VOUT = 2.5V 25 DRIVER SUPPLY CURRENT 90 VOUT = 1.6V 20 IL 20mV/DIV 15 EFFICIENCY (%) 80 10 DRIVER SUPPLY CURRENT (mA) 5 70 0 0 5 10 15 1702A G02 10µs/DIV 0 2000 4000 6000 8000 10000 LOAD CURRENT (A) GATE CAPACITANCE (pF) 1702A G01 1702A G03
Normalized Oscillator Frequency Supply Current vs Temperature vs Temperature Driver RON vs Temperature
2.6 2.5 1.4 TEST CIRCUIT 1 VCC = 5V VPVCC = 5V 2.0 1.3 2.4 C V L = 0pF BOOST – VSW = 5V PVCC 1.5 1.2 2.2 V 1.0 1.1 CC 2.0 0.5 ) 1.0 Ω 1.8 0 ( 0.9 ONR –0.5 0.8 1.6 –1.0 0.7 SUPPLY CURRENT (mA) 1.4 –1.5 0.6 BOOST1, BOOST2 1.2 –2.0 0.5 NORMALIZED OSCILLATOR FREQUENCY (%) 1.0 –2.5 0.4 – 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) 1702A G04 1702A G05 1702A G06
RUN/SS Source Current vs Temperature Nonoverlap Time vs Temperature Driver Rise/Fall vs Temperature
5.0 70 15 VCC = 5V TEST CIRCUIT 1 TEST CIRCUIT 1 C CL = 2000pF 60 L = 2000pF 4.5 14 TG FALLING EDGE µA) 50 4.0 BG RISING EDGE 13 40 3.5 BG FALLING EDGE 30 TG RISING EDGE 12 3.0 NONOVERLAP (ns) 20 RISE/FALL TIME (ns) SOURCE CURRENT ( 11 2.5 10 2.0 0 12 –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) 1702A G07 1702A G08 1702A G09 1702afa 4
W U TYPICAL PERFOR A CE CHARACTERISTICS MOSFET Driver Supply Current Efficiency vs Load Current Transient Response vs Gate Capacitance
100 35 VIN = 5V VIN = 5V TEST CIRCUIT 1 VOUT = 3.3V VOUT = 1.8V ONE DRIVER LOADED 30 ILOAD = 0A-10A-0A MULTIPLY BY # OF ACTIVE ±2.2% MAX DEVIATION DRIVERS TO OBTAIN TOTAL VOUT = 2.5V 25 DRIVER SUPPLY CURRENT 90 VOUT = 1.6V 20 IL 20mV/DIV 15 EFFICIENCY (%) 80 10 DRIVER SUPPLY CURRENT (mA) 5 70 0 0 5 10 15 1702A G02 10µs/DIV 0 2000 4000 6000 8000 10000 LOAD CURRENT (A) GATE CAPACITANCE (pF) 1702A G01 1702A G03
Normalized Oscillator Frequency Supply Current vs Temperature vs Temperature Driver RON vs Temperature
2.6 2.5 1.4 TEST CIRCUIT 1 VCC = 5V VPVCC = 5V 2.0 1.3 2.4 C V L = 0pF BOOST – VSW = 5V PVCC 1.5 1.2 2.2 V 1.0 1.1 CC 2.0 0.5 ) 1.0 Ω 1.8 0 ( 0.9 ONR –0.5 0.8 1.6 –1.0 0.7 SUPPLY CURRENT (mA) 1.4 –1.5 0.6 BOOST1, BOOST2 1.2 –2.0 0.5 NORMALIZED OSCILLATOR FREQUENCY (%) 1.0 –2.5 0.4 – 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) 1702A G04 1702A G05 1702A G06
RUN/SS Source Current vs Temperature Nonoverlap Time vs Temperature Driver Rise/Fall vs Temperature
5.0 70 15 VCC = 5V TEST CIRCUIT 1 TEST CIRCUIT 1 C CL = 2000pF 60 L = 2000pF 4.5 14 TG FALLING EDGE µA) 50 4.0 BG RISING EDGE 13 40 3.5 BG FALLING EDGE 30 TG RISING EDGE 12 3.0 NONOVERLAP (ns) 20 RISE/FALL TIME (ns) SOURCE CURRENT ( 11 2.5 10 2.0 0 12 –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) 1702A G07 1702A G08 1702A G09 1702afa 4
