Datasheet LT3692A (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | Monolithic Dual Tracking 3.5A Step-Down Switching Regulator |
| 页数 / 页 | 42 / 4 — elecTrical characTerisTics. The. denotes the specifications which apply … |
| 文件格式/大小 | PDF / 742 Kb |
| 文件语言 | 英语 |
elecTrical characTerisTics. The. denotes the specifications which apply over the full operating
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LT3692A
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VVIN1/2 = 15V unless otherwise specified. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS
Soft-Start Source Current Ch 1/2 VFB1/2 = 2V, VSS1/2 = 0.07V l 9.5 12 14.5 µA Soft-Start VOH Ch 1/2 VFB1/2 = 2V 1.9 2.15 2.4 V Soft-Start Sink Current Ch 1/2 VFB1/2 = 0.7V, VSS1/2 = 2V 0.7 1.4 2 mA Soft-Start VOL Ch 1/2 VFB1/2 = 0V 120 160 200 mV Soft-Start to Feedback Offset Ch 1/2 VVC1/2 = 1V, VSS1/2 = 0.4V l –12 0 12 mV Soft-Start Sink Current Ch 1/2 POR VFB1/2 = 2V, VSS1/2 = 0.14V (Note 7) 150 400 600 µA Soft-Start POR Threshold 70 100 140 mV Soft-Start SW Disable Ch 1/2 VFB1/2 = 0V (Note 7) 95 115 150 mV CMPI Bias Current Ch 1/2 VCMPI1/2 = 0.8V –100 0 100 nA CMPO Leakage Ch 1/2 VCMPI1/2 = 0.8V, VCMPO1/2 = 40V, 70 500 nA CMPI Threshold Ch 1/2 VCMPI1/2 Rising l 700 720 760 mV CMPI Threshold Ch 1/2 of VFB1/2 VCMPI1/2 Rising (Note 8) 86 90 94 % CMPI Hysteresis Ch 1/2 VCMPI1/2 35 60 85 mV CMPO Sink Current Ch 1/2 VCMPI1/2 = 0.6V, VCMPO1/2 = 0.2V, 200 300 µA RT/SYNC Reference Current VRT/SYNC = 0.36V (E- and I-Grade) l 11.3 12 12.7 µA VRT/SYNC = 0.36V (H-Grade) l 11.2 12 13 µA Minimum Switching Frequency RRT/SYNC =0Ω 50 110 150 kHz Switching Frequency RRT/SYNC = 28k 925 1 1075 kHz Maximum Switching Frequency RRT/SYNC =100k 2.25 2.5 3.0 MHz Switching Phase Angle Ch 1 ≥ Ch 2 185 Deg DIV Reference Current VDIV = 1V l 10.7 12 13.3 µA CH1 DIV 2 Threshold RRT/SYNC = 0V 0.44 0.5 0.56 V CH1 DIV 4 Threshold RRT/SYNC = 0V 0.89 1.0 1.06 V CH1 DIV 8 Threshold RRT/SYNC = 0V 1.39 1.5 1.56 V CLKOUT VOL 0.25 V CLKOUT VOH 2 V CLKOUT to SW1ON Delay ( tDCLKOSW1) CLKOUT Rising 60 ns CLKOUT to SW2ON Delay ( tDCLKOSW2) CLKOUT Falling 30 ns RT/SYNC to CLKOUT Delay ( tDRTSYNCH) VRT/SYNC = 0V to 2V Rising Edge 300 ns RT/SYNC to CLKOUT Delay ( tDRTSYNCL) VRT/SYNC = 2V to 0V Falling Edge 150 ns SYNC Frequency Range 250 2000 kHz SYNC Phase Angle Ch 1 to Ch 2 SYNC Frequency = 250kHz 180 Deg Minimum Switch On-Time Ch 1/2 140 ns Minimum Switch Off-Time Ch 1/2 200 ns 3692afc 4 For more information www.linear.com/3692A Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
elecTrical characTerisTics The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VVIN1/2 = 15V unless otherwise specified. (Note 3) PARAMETER CONDITIONS MIN TYP MAX UNITS
Soft-Start Source Current Ch 1/2 VFB1/2 = 2V, VSS1/2 = 0.07V l 9.5 12 14.5 µA Soft-Start VOH Ch 1/2 VFB1/2 = 2V 1.9 2.15 2.4 V Soft-Start Sink Current Ch 1/2 VFB1/2 = 0.7V, VSS1/2 = 2V 0.7 1.4 2 mA Soft-Start VOL Ch 1/2 VFB1/2 = 0V 120 160 200 mV Soft-Start to Feedback Offset Ch 1/2 VVC1/2 = 1V, VSS1/2 = 0.4V l –12 0 12 mV Soft-Start Sink Current Ch 1/2 POR VFB1/2 = 2V, VSS1/2 = 0.14V (Note 7) 150 400 600 µA Soft-Start POR Threshold 70 100 140 mV Soft-Start SW Disable Ch 1/2 VFB1/2 = 0V (Note 7) 95 115 150 mV CMPI Bias Current Ch 1/2 VCMPI1/2 = 0.8V –100 0 100 nA CMPO Leakage Ch 1/2 VCMPI1/2 = 0.8V, VCMPO1/2 = 40V, 70 500 nA CMPI Threshold Ch 1/2 VCMPI1/2 Rising l 700 720 760 mV CMPI Threshold Ch 1/2 of VFB1/2 VCMPI1/2 Rising (Note 8) 86 90 94 % CMPI Hysteresis Ch 1/2 VCMPI1/2 35 60 85 mV CMPO Sink Current Ch 1/2 VCMPI1/2 = 0.6V, VCMPO1/2 = 0.2V, 200 300 µA RT/SYNC Reference Current VRT/SYNC = 0.36V (E- and I-Grade) l 11.3 12 12.7 µA VRT/SYNC = 0.36V (H-Grade) l 11.2 12 13 µA Minimum Switching Frequency RRT/SYNC =0Ω 50 110 150 kHz Switching Frequency RRT/SYNC = 28k 925 1 1075 kHz Maximum Switching Frequency RRT/SYNC =100k 2.25 2.5 3.0 MHz Switching Phase Angle Ch 1 ≥ Ch 2 185 Deg DIV Reference Current VDIV = 1V l 10.7 12 13.3 µA CH1 DIV 2 Threshold RRT/SYNC = 0V 0.44 0.5 0.56 V CH1 DIV 4 Threshold RRT/SYNC = 0V 0.89 1.0 1.06 V CH1 DIV 8 Threshold RRT/SYNC = 0V 1.39 1.5 1.56 V CLKOUT VOL 0.25 V CLKOUT VOH 2 V CLKOUT to SW1ON Delay ( tDCLKOSW1) CLKOUT Rising 60 ns CLKOUT to SW2ON Delay ( tDCLKOSW2) CLKOUT Falling 30 ns RT/SYNC to CLKOUT Delay ( tDRTSYNCH) VRT/SYNC = 0V to 2V Rising Edge 300 ns RT/SYNC to CLKOUT Delay ( tDRTSYNCL) VRT/SYNC = 2V to 0V Falling Edge 150 ns SYNC Frequency Range 250 2000 kHz SYNC Phase Angle Ch 1 to Ch 2 SYNC Frequency = 250kHz 180 Deg Minimum Switch On-Time Ch 1/2 140 ns Minimum Switch Off-Time Ch 1/2 200 ns 3692afc 4 For more information www.linear.com/3692A Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts