Datasheet LTC7124 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 17V, Dual 3.5A Synchronous Step-Down Regulator with Ultralow Quiescent Current |
| Pages / Page | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, L = 2.2µH, f = … |
| File Format / Size | PDF / 1.7 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, L = 2.2µH, f = 1MHz unless. otherwise noted. Peak Current Limit
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Text Version of Document
LTC7124
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, L = 2.2µH, f = 1MHz unless otherwise noted. Peak Current Limit Load Step Load Step vs Temperature with Internal Compensation with External Compensation
5.2 VOUT VOUT AC–COUPLED AC–COUPLED 200mV/DIV 200mV/DIV 5.1 ILOAD 5.0 5A/DIV ILOAD 5A/DIV 4.8 I I L L 2A/DIV 2A/DIV PEAK CURRENT LIMIT (A) 4.7 40µs/DIV 7124 G11 10µs/DIV 7124 G14 VIN = 12V VIN = 12V 4.6 VOUT = 2.5V VOUT = 2.5V –50 –25 0 25 50 75 100 125 ILOAD = 100mA to 3.5A ILOAD = 150mA to 3.5A TEMPERATURE (°C) L = 1.8µH L = 1.2µH 7124 G10 ITH = INTVCC CITH = 150pF, RITH = 30kΩ COUT = 100µF COUT = 100µF
Reference Voltage vs Temperature RDS(ON) vs Temperature RDS(ON) vs Input Supply Voltage
601.5 150 100 TOP SWITCH TOP SWITCH 601.0 BOTTOM SWITCH BOTTOM SWITCH 125 80 600.5 100 TAGE (mV) 600.0 60 (mΩ) (mΩ) 75 599.5 R DS,ON 40 R DS, ON 50 599.0 REFERENCE VOL 20 598.5 25 598.0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 1011121314151617 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 7124 G13 7124 G14 7124 G15
Start–Up With Load Start–Up into Pre–Biased Output Switch Leakage Current in Burst Mode Operation in Burst Mode Operation
16 TOP SWITCH 14 RUN RUN BOTTOM SWITCH 2V/DIV 2V/DIV 12 VOUT IL 2V/DIV 10 1A/DIV PGOOD 8 VOUT 2V/DIV 2V/DIV 6 PGOOD IL SW LEAKAGE (µA) 2V/DIV 1A/DIV 4 7124 G17 7124 G18 2 500µs/DIV 500µs/DIV RLOAD = 5Ω VOUT = 5V 0 VOUT = 5V –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) 7124 G16 7124fa For more information www.linear.com/LTC7124 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 12V, L = 2.2µH, f = 1MHz unless otherwise noted. Peak Current Limit Load Step Load Step vs Temperature with Internal Compensation with External Compensation
5.2 VOUT VOUT AC–COUPLED AC–COUPLED 200mV/DIV 200mV/DIV 5.1 ILOAD 5.0 5A/DIV ILOAD 5A/DIV 4.8 I I L L 2A/DIV 2A/DIV PEAK CURRENT LIMIT (A) 4.7 40µs/DIV 7124 G11 10µs/DIV 7124 G14 VIN = 12V VIN = 12V 4.6 VOUT = 2.5V VOUT = 2.5V –50 –25 0 25 50 75 100 125 ILOAD = 100mA to 3.5A ILOAD = 150mA to 3.5A TEMPERATURE (°C) L = 1.8µH L = 1.2µH 7124 G10 ITH = INTVCC CITH = 150pF, RITH = 30kΩ COUT = 100µF COUT = 100µF
Reference Voltage vs Temperature RDS(ON) vs Temperature RDS(ON) vs Input Supply Voltage
601.5 150 100 TOP SWITCH TOP SWITCH 601.0 BOTTOM SWITCH BOTTOM SWITCH 125 80 600.5 100 TAGE (mV) 600.0 60 (mΩ) (mΩ) 75 599.5 R DS,ON 40 R DS, ON 50 599.0 REFERENCE VOL 20 598.5 25 598.0 0 0 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 0 1 2 3 4 5 6 7 8 9 1011121314151617 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) 7124 G13 7124 G14 7124 G15
Start–Up With Load Start–Up into Pre–Biased Output Switch Leakage Current in Burst Mode Operation in Burst Mode Operation
16 TOP SWITCH 14 RUN RUN BOTTOM SWITCH 2V/DIV 2V/DIV 12 VOUT IL 2V/DIV 10 1A/DIV PGOOD 8 VOUT 2V/DIV 2V/DIV 6 PGOOD IL SW LEAKAGE (µA) 2V/DIV 1A/DIV 4 7124 G17 7124 G18 2 500µs/DIV 500µs/DIV RLOAD = 5Ω VOUT = 5V 0 VOUT = 5V –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) 7124 G16 7124fa For more information www.linear.com/LTC7124 5
