Datasheet RH3845MK (Analog Devices) - 2
| 制造商 | Analog Devices |
| 描述 | Radiation Hardened High Voltage Synchronous Step-Down Controller |
| 页数 / 页 | 8 / 2 — TABLE 1. : ELECTRICAL CHARACTERISTICS (Pre-Irradiation) Unless … |
| 文件格式/大小 | PDF / 263 Kb |
| 文件语言 | 英语 |
TABLE 1. : ELECTRICAL CHARACTERISTICS (Pre-Irradiation) Unless specified,specifications are at VIN
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RH3845MW
TABLE 1 : ELECTRICAL CHARACTERISTICS (Pre-Irradiation) Unless specified,specifications are at VIN = 20V, VCC = BOOST = 10V, SHDN = 2V, RSET = 49.9kΩ, SENSE– = SENSE+ = 10V, SGND = PGND, SW = 0V. SUB- TA = 25°C SUB- –55°C ≤ TA ≤ 125°C PARAMETER CONDITIONS GROUP MIN TYP MAX GROUP MIN TYP MAX UNITS
VIN Minimum Start Voltage (Note 2) 1 7.5 2, 3 7.5 V VIN UVLO Threshold (Falling) 1 3.6 3.8 4.0 2, 3 3.6 3.8 4.0 V VIN Supply Current VCC > 9V 1 130 200 2, 3 800 μA VIN Shutdown Current VSHDN = 0.3V 1 65 100 2, 3 200 μA BOOST Supply Current (Note 3) 1 1.4 2 2, 3 3.5 mA VCC Supply Current 1 3.8 4.5 2, 3 6.1 mA VCC Current Limit 1 –40 –150 2, 3 –40 mA SHDN Enable Threshold (Rising) 1 1.30 1.35 1.4 2, 3 1.30 1.5 V SHDN Hysteresis 1 140 2, 3 100 200 mV Reference Voltage 1 1.222 1.232 1.244 2, 3 1.214 1.250 V VFB Input Bias Current RH3845MW-1 1 ±60 ±200 2, 3 ±60 nA RH3845MW-2 ±20 ±150 ±20 nA VFB Error Amp Transconductance 1 350 450 2, 3 340 540 μS Error Amp Sink/Source Current 1 35 50 2, 3 20 μA Peak Current Limit Sense Voltage 1 90 105 120 2, 3 85 125 mV Soft-Start Charge Current 1 8 12 14 2, 3 8 16 μA Sense Pins Common-Mode Range 1 0 36 2, 3 0 36 V Sense Pins Input Current VSENSE(CM) > 4V 1 320 400 2, 3 500 μA Reverse Protect Sense Voltage RH3845MW-2 1 108 120 2, 3 140 mV Reverse Current Sense Voltage Offset RH3845MW-1 1 15 20 2, 3 25 mV Switching Frequency RSET = 49.9k 1 270 300 360 2, 3 240 390 kHz Programmable Frequency Range 1 100 500 2, 3 100 500 kHz External Sync Frequency Range 1 100 600 2, 3 100 600 kHz Non-Overlap Time TG to BG 1 250 2, 3 ns Non-Overlap Time BG to TG 1 250 2, 3 ns TG Minimum On-Time 1 400 2, 3 ns TG Minimum Off-Time 1 300 2, 3 ns TG, BG Drive On Voltage 1 8 8.75 2, 3 8 V TG, BG Drive Off Voltage 1 0.1 2, 3 0.1 V TG, BG Drive Rise Time CTG = CBG = 3300pF 1 45 2, 3 ns TG, BG Drive Fall Time CTG = CBG = 3300pF 1 45 2, 3 ns Rev. 0 2 For more information www.analog.com Document Outline Description Typical Application Absolute Maximum Ratings Package Information Table 1: Electrical characteristics Table 2: Electrical characteristics Electrical Characteristics: Burn-In Delta Parameters Electrical Test Requirements Total Dose Bias Circuit — Run Mode Total Dose Bias Circuit — Shutdown Mode Burn-In Circuit—Run Mode Package Description Typical Performance Characteristics
TABLE 1 : ELECTRICAL CHARACTERISTICS (Pre-Irradiation) Unless specified,specifications are at VIN = 20V, VCC = BOOST = 10V, SHDN = 2V, RSET = 49.9kΩ, SENSE– = SENSE+ = 10V, SGND = PGND, SW = 0V. SUB- TA = 25°C SUB- –55°C ≤ TA ≤ 125°C PARAMETER CONDITIONS GROUP MIN TYP MAX GROUP MIN TYP MAX UNITS
VIN Minimum Start Voltage (Note 2) 1 7.5 2, 3 7.5 V VIN UVLO Threshold (Falling) 1 3.6 3.8 4.0 2, 3 3.6 3.8 4.0 V VIN Supply Current VCC > 9V 1 130 200 2, 3 800 μA VIN Shutdown Current VSHDN = 0.3V 1 65 100 2, 3 200 μA BOOST Supply Current (Note 3) 1 1.4 2 2, 3 3.5 mA VCC Supply Current 1 3.8 4.5 2, 3 6.1 mA VCC Current Limit 1 –40 –150 2, 3 –40 mA SHDN Enable Threshold (Rising) 1 1.30 1.35 1.4 2, 3 1.30 1.5 V SHDN Hysteresis 1 140 2, 3 100 200 mV Reference Voltage 1 1.222 1.232 1.244 2, 3 1.214 1.250 V VFB Input Bias Current RH3845MW-1 1 ±60 ±200 2, 3 ±60 nA RH3845MW-2 ±20 ±150 ±20 nA VFB Error Amp Transconductance 1 350 450 2, 3 340 540 μS Error Amp Sink/Source Current 1 35 50 2, 3 20 μA Peak Current Limit Sense Voltage 1 90 105 120 2, 3 85 125 mV Soft-Start Charge Current 1 8 12 14 2, 3 8 16 μA Sense Pins Common-Mode Range 1 0 36 2, 3 0 36 V Sense Pins Input Current VSENSE(CM) > 4V 1 320 400 2, 3 500 μA Reverse Protect Sense Voltage RH3845MW-2 1 108 120 2, 3 140 mV Reverse Current Sense Voltage Offset RH3845MW-1 1 15 20 2, 3 25 mV Switching Frequency RSET = 49.9k 1 270 300 360 2, 3 240 390 kHz Programmable Frequency Range 1 100 500 2, 3 100 500 kHz External Sync Frequency Range 1 100 600 2, 3 100 600 kHz Non-Overlap Time TG to BG 1 250 2, 3 ns Non-Overlap Time BG to TG 1 250 2, 3 ns TG Minimum On-Time 1 400 2, 3 ns TG Minimum Off-Time 1 300 2, 3 ns TG, BG Drive On Voltage 1 8 8.75 2, 3 8 V TG, BG Drive Off Voltage 1 0.1 2, 3 0.1 V TG, BG Drive Rise Time CTG = CBG = 3300pF 1 45 2, 3 ns TG, BG Drive Fall Time CTG = CBG = 3300pF 1 45 2, 3 ns Rev. 0 2 For more information www.analog.com Document Outline Description Typical Application Absolute Maximum Ratings Package Information Table 1: Electrical characteristics Table 2: Electrical characteristics Electrical Characteristics: Burn-In Delta Parameters Electrical Test Requirements Total Dose Bias Circuit — Run Mode Total Dose Bias Circuit — Shutdown Mode Burn-In Circuit—Run Mode Package Description Typical Performance Characteristics