Datasheet LTC3672B-2 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Monolithic Fixed-Output 400mA Buck Regulator with Dual 150mA LDOs in 2mm × 2mm DFN |
| 页数 / 页 | 12 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| 文件格式/大小 | PDF / 161 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC3672B-2
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = VIN1 = 3.6V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RPD,BUCKOUT BUCKOUT Pulldown Resistance in Shutdown VENALL = 0V 10 kΩ RPD,SW SW Pulldown Resistance in Shutdown VENALL = 0V 10 kΩ tSS,BUCK Soft-Start Time 0.2 ms
LDO Regulator 1
VLDO1 Regulated Output Voltage LDO1 Output, ILDO1 = 1mA l 2.73 2.8 2.87 V Line Regulation with Respect to VIN ILDO1 = 1mA, VIN = VIN1 = 2.9V to 5.5V 1 mV/V Load Regulation ILDO1 = 1mA to 150mA –0.1 mV/mA Available Output Current 150 mA Short-Circuit Output Current 440 mA VDROP1 Dropout Voltage (Note 6) ILDO1 = 150mA 135 250 mV tSS,LDO1 Soft-Start Time 0.1 ms RPD,LDO1 Output Pulldown Resistance in Shutdown 10 kΩ
LDO Regulator 2
VLDO2 Regulated Output Voltage LDO2 Output, ILDO2 = 1mA l 1.755 1.8 1.845 V Line Regulation with Respect to VIN ILDO2 = 1mA, VIN = 2.9V to 5.5V 0.6 mV/V Load Regulation ILDO2 = 1mA to 150mA –0.1 mV/mA Available Output Current 150 mA Short-Circuit Output Current 450 mA VDROP2 Dropout Voltage (Note 6) ILDO2 = 150mA 290 400 mV tSS,LDO2 Soft-Start Time 0.1 ms RPD,LDO2 Output Pulldown Resistance in Shutdown 10 kΩ
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
Dynamic supply current is higher due to the gate charge delivered may cause permanent damage to the device. Exposure to any Absolute to the buck regulator’s internal MOSFET switches at the switching Maximum Rating condition for extended periods may affect device frequency. reliability and lifetime.
Note 5:
The current limit features of this part are intended to protect the
Note 2:
The LTC3672B-2 is guaranteed to meet performance specifi cations IC from short term or intermittent fault conditions. Continuous operation from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating above the specifi ed maximum specifi ed pin current rating may result in temperature range are assured by design, characterization and correlation device degradation or failure. with statistical process controls.
Note 6:
Dropout voltage is the minimum input to output voltage differential
Note 3:
This IC includes overtemperature protection that is intended needed to maintain regulation at a specifi ed output current. When LDO1 is to protect the device during momentary overload conditions. Junction in dropout, its output voltage will be equal to: VIN1 – VDROP1. When LDO2 temperature will exceed 125°C when overtemperature protection is active. is in dropout, its output voltage will be equal to: VIN – VDROP2. Continuous operation above the specifi ed maximum operating junction temperature may impair device reliability. 3672b2fa 3
ELECTRICAL CHARACTERISTICS The
l
denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TA = 25°C. VIN = VIN1 = 3.6V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
RPD,BUCKOUT BUCKOUT Pulldown Resistance in Shutdown VENALL = 0V 10 kΩ RPD,SW SW Pulldown Resistance in Shutdown VENALL = 0V 10 kΩ tSS,BUCK Soft-Start Time 0.2 ms
LDO Regulator 1
VLDO1 Regulated Output Voltage LDO1 Output, ILDO1 = 1mA l 2.73 2.8 2.87 V Line Regulation with Respect to VIN ILDO1 = 1mA, VIN = VIN1 = 2.9V to 5.5V 1 mV/V Load Regulation ILDO1 = 1mA to 150mA –0.1 mV/mA Available Output Current 150 mA Short-Circuit Output Current 440 mA VDROP1 Dropout Voltage (Note 6) ILDO1 = 150mA 135 250 mV tSS,LDO1 Soft-Start Time 0.1 ms RPD,LDO1 Output Pulldown Resistance in Shutdown 10 kΩ
LDO Regulator 2
VLDO2 Regulated Output Voltage LDO2 Output, ILDO2 = 1mA l 1.755 1.8 1.845 V Line Regulation with Respect to VIN ILDO2 = 1mA, VIN = 2.9V to 5.5V 0.6 mV/V Load Regulation ILDO2 = 1mA to 150mA –0.1 mV/mA Available Output Current 150 mA Short-Circuit Output Current 450 mA VDROP2 Dropout Voltage (Note 6) ILDO2 = 150mA 290 400 mV tSS,LDO2 Soft-Start Time 0.1 ms RPD,LDO2 Output Pulldown Resistance in Shutdown 10 kΩ
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
Dynamic supply current is higher due to the gate charge delivered may cause permanent damage to the device. Exposure to any Absolute to the buck regulator’s internal MOSFET switches at the switching Maximum Rating condition for extended periods may affect device frequency. reliability and lifetime.
Note 5:
The current limit features of this part are intended to protect the
Note 2:
The LTC3672B-2 is guaranteed to meet performance specifi cations IC from short term or intermittent fault conditions. Continuous operation from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating above the specifi ed maximum specifi ed pin current rating may result in temperature range are assured by design, characterization and correlation device degradation or failure. with statistical process controls.
Note 6:
Dropout voltage is the minimum input to output voltage differential
Note 3:
This IC includes overtemperature protection that is intended needed to maintain regulation at a specifi ed output current. When LDO1 is to protect the device during momentary overload conditions. Junction in dropout, its output voltage will be equal to: VIN1 – VDROP1. When LDO2 temperature will exceed 125°C when overtemperature protection is active. is in dropout, its output voltage will be equal to: VIN – VDROP2. Continuous operation above the specifi ed maximum operating junction temperature may impair device reliability. 3672b2fa 3