Datasheet LTC3310S (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | 5V, 10A Synchronous Step-Down Silent Switcher 2 in 3mm x 3mm LQFN |
| 页数 / 页 | 30 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| 修订版 | B |
| 文件格式/大小 | PDF / 2.9 Mb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified
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LTC3310S
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C. (Notes 2, 3) VIN = 3.3V, VEN = VIN, MODE/SYNC = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply
Operating Supply Voltage (VIN) l 2.25 5.5 V VIN Undervoltage Lockout VIN Rising l 2.0 2.1 2.2 V VIN Undervoltage Lockout Hysteresis 150 mV VIN Quiescent Current (Note 4) 1.3 2.0 mA VIN Quiescent Current in Shutdown VEN = 0.1V 1 2 μA EN Threshold VEN Rising l 0.375 0.4 0.425 V EN Hysteresis 60 mV EN Pin Leakage Current VEN = 0.4V ±20 nA
Voltage Regulation
Regulated Feedback Voltage (VFB) l 495 500 505 mV Feedback Voltage Line Regulation 2.5V ≤ VIN ≤ 5.0V 0.002 0.025 %/V Feedback Pin Input Current VFB = 0.5V ±20 nA Error Amp Transconductance 400 µS Error Amp Sink/Source Current ±25 µA Top Switch Current Limit VOUT/VIN ≤ 0.2, Current Out of SW l 14.5 16 18.5 A Bottom Switch Current Limit (IVALLEYMAX) Current Out of SW l 10 12 14 A Top Switch ON-Resistance 16 mΩ Bottom Switch ON-Resistance 4.5 mΩ SW Leakage Current VEN = 0.1V ±100 nA VITH to IPeak Current Gain 18 A/V Minimum On-Time l 35 60 ns Maximum Duty cycle l 100 %
Power Good/Soft-Start/Temp Monitor
PGOOD Rising Threshold As a Percentage of the Regulated VOUT l 97 98 99 % PGOOD Hysteresis l 0.5 1 1.5 % Overvoltage Rising Threshold As a Percentage of the Regulated VOUT l 106 110 112.5 % Overvoltage Hysteresis l 1 2.5 3.5 % PGOOD Leakage Current VPGOOD = 5.5V 20 nA PGOOD Pull-Down Resistance VPGOOD = 0.1V 12 20 Ω PGOOD Delay 100 µs Soft-Start Charge Current VSSTT = 0.5V l 7 10 13 µA Temp Monitor Slope 4 mV/°C
Oscillator
Switching Frequency Range RT Programmable l 0.5 5 MHz Switching Frequency RT = 274k l 1.8 2 2.2 MHz Synchronization Frequency Range RT = VIN l 0.5 2.25 MHz Default Frequency RT = VIN l 1.8 2 2.2 MHz Rev. B For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C. (Notes 2, 3) VIN = 3.3V, VEN = VIN, MODE/SYNC = 0V, unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supply
Operating Supply Voltage (VIN) l 2.25 5.5 V VIN Undervoltage Lockout VIN Rising l 2.0 2.1 2.2 V VIN Undervoltage Lockout Hysteresis 150 mV VIN Quiescent Current (Note 4) 1.3 2.0 mA VIN Quiescent Current in Shutdown VEN = 0.1V 1 2 μA EN Threshold VEN Rising l 0.375 0.4 0.425 V EN Hysteresis 60 mV EN Pin Leakage Current VEN = 0.4V ±20 nA
Voltage Regulation
Regulated Feedback Voltage (VFB) l 495 500 505 mV Feedback Voltage Line Regulation 2.5V ≤ VIN ≤ 5.0V 0.002 0.025 %/V Feedback Pin Input Current VFB = 0.5V ±20 nA Error Amp Transconductance 400 µS Error Amp Sink/Source Current ±25 µA Top Switch Current Limit VOUT/VIN ≤ 0.2, Current Out of SW l 14.5 16 18.5 A Bottom Switch Current Limit (IVALLEYMAX) Current Out of SW l 10 12 14 A Top Switch ON-Resistance 16 mΩ Bottom Switch ON-Resistance 4.5 mΩ SW Leakage Current VEN = 0.1V ±100 nA VITH to IPeak Current Gain 18 A/V Minimum On-Time l 35 60 ns Maximum Duty cycle l 100 %
Power Good/Soft-Start/Temp Monitor
PGOOD Rising Threshold As a Percentage of the Regulated VOUT l 97 98 99 % PGOOD Hysteresis l 0.5 1 1.5 % Overvoltage Rising Threshold As a Percentage of the Regulated VOUT l 106 110 112.5 % Overvoltage Hysteresis l 1 2.5 3.5 % PGOOD Leakage Current VPGOOD = 5.5V 20 nA PGOOD Pull-Down Resistance VPGOOD = 0.1V 12 20 Ω PGOOD Delay 100 µs Soft-Start Charge Current VSSTT = 0.5V l 7 10 13 µA Temp Monitor Slope 4 mV/°C
Oscillator
Switching Frequency Range RT Programmable l 0.5 5 MHz Switching Frequency RT = 274k l 1.8 2 2.2 MHz Synchronization Frequency Range RT = VIN l 0.5 2.25 MHz Default Frequency RT = VIN l 1.8 2 2.2 MHz Rev. B For more information www.analog.com 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts