Datasheet LT3383 (Analog Devices) - 3
| Fabricante | Analog Devices |
| Descripción | Multioutput Power Management Solution with 4 Buck Switching and 3 LDO Linear Regulators |
| Páginas / Página | 18 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply … |
| Formato / tamaño de archivo | PDF / 1.2 Mb |
| Idioma del documento | Inglés |
ELECTRICAL CHARACTERISTICS. The. denotes the specifications which apply over the specified operating
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LT3383
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = PVIN1 = PVIN2 = PVIN3 = PVIN4 = VIN_L1 = VIN_L2 = VIN_L3 = 3.8V. All regulators disabled unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Operating Input Supply Voltage, VIN l 2.7 5.5 V VIN Standby Current PWR_ON = 0V l 12 21 µA VIN Undervoltage Fault Rising (Note 7) l 2.55 2.65 V VIN Undervoltage Fault Falling l 2.35 2.45 V
Step-Down Switching Regulators 1, 2, 3 and 4
Output Voltage Range l VFB PVIN V VIN Quiescent Current FB_Bx = 850mV (Note 5) l 120 200 µA Feedback Regulation Voltage (VFB) l 714 725 736 mV Feedback Pin Input Current FB_Bx = 850mV –0.05 0.05 µA Maximum Duty Cycle FB_Bx = 0V l 100 % Minimum Duty Cycle l 18 24 % SW Pull-Down Resistance Regulator Disabled 625 Ω Feedback Reference Soft-Start Rate (Note 6) 0.8 V/ms Switching Frequency l 1.7 2.25 2.7 MHz
1.5A Step-Down Switching Regulators 3 and 4
PMOS Current Limit l 2.0 A PMOS On-Resistance 160 mΩ NMOS On-Resistance 80 mΩ
2.5A Step-Down Switching Regulators 1 and 2
PMOS Current Limit l 3.0 A PMOS On-Resistance 120 mΩ NMOS On-Resistance 70 mΩ
LDO Regulators 1, 2 and 3
Feedback Reference Soft-Start Rate 10 V/ms Output Pull-Down Resistance Regulator Disabled 625 Ω
LDO Regulators 1 and 2
VIN_Lx Input Voltage l 1.7 VIN V Output Voltage Range ILDO = 0mA VFB_Lx VIN_Lx V Available Output Current l 300 mA VIN_Lx Quiescent Current Regulator Enabled, ILDO = 0A l 12 25 µA VIN_Lx Shutdown Current Regulator Disabled l 0 1 µA VIN Quiescent Current Regulator Enabled l 50 85 µA Feedback Regulation Voltage l 0.707 0.725 0.743 V Line Regulation ILDO = 1mA, VIN = 2.7V to 5.5V 0.01 %/V Load Regulation ILDO = 1mA to 300mA 0.01 % Short-Circuit Current Limit 770 mA Dropout Voltage (Note 4) ILDO = 300mA, VLDO = 2.5V 210 260 mV ILDO = 300mA, VLDO = 1.2V 450 615 mV Feedback Pin Input Current FB_Lx = 725mV –0.05 0.05 µA Rev. 0 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 Introduction Step-Down Switching Regulators Power On Sequencing Fault Detection and Reporting Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VIN = PVIN1 = PVIN2 = PVIN3 = PVIN4 = VIN_L1 = VIN_L2 = VIN_L3 = 3.8V. All regulators disabled unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Operating Input Supply Voltage, VIN l 2.7 5.5 V VIN Standby Current PWR_ON = 0V l 12 21 µA VIN Undervoltage Fault Rising (Note 7) l 2.55 2.65 V VIN Undervoltage Fault Falling l 2.35 2.45 V
Step-Down Switching Regulators 1, 2, 3 and 4
Output Voltage Range l VFB PVIN V VIN Quiescent Current FB_Bx = 850mV (Note 5) l 120 200 µA Feedback Regulation Voltage (VFB) l 714 725 736 mV Feedback Pin Input Current FB_Bx = 850mV –0.05 0.05 µA Maximum Duty Cycle FB_Bx = 0V l 100 % Minimum Duty Cycle l 18 24 % SW Pull-Down Resistance Regulator Disabled 625 Ω Feedback Reference Soft-Start Rate (Note 6) 0.8 V/ms Switching Frequency l 1.7 2.25 2.7 MHz
1.5A Step-Down Switching Regulators 3 and 4
PMOS Current Limit l 2.0 A PMOS On-Resistance 160 mΩ NMOS On-Resistance 80 mΩ
2.5A Step-Down Switching Regulators 1 and 2
PMOS Current Limit l 3.0 A PMOS On-Resistance 120 mΩ NMOS On-Resistance 70 mΩ
LDO Regulators 1, 2 and 3
Feedback Reference Soft-Start Rate 10 V/ms Output Pull-Down Resistance Regulator Disabled 625 Ω
LDO Regulators 1 and 2
VIN_Lx Input Voltage l 1.7 VIN V Output Voltage Range ILDO = 0mA VFB_Lx VIN_Lx V Available Output Current l 300 mA VIN_Lx Quiescent Current Regulator Enabled, ILDO = 0A l 12 25 µA VIN_Lx Shutdown Current Regulator Disabled l 0 1 µA VIN Quiescent Current Regulator Enabled l 50 85 µA Feedback Regulation Voltage l 0.707 0.725 0.743 V Line Regulation ILDO = 1mA, VIN = 2.7V to 5.5V 0.01 %/V Load Regulation ILDO = 1mA to 300mA 0.01 % Short-Circuit Current Limit 770 mA Dropout Voltage (Note 4) ILDO = 300mA, VLDO = 2.5V 210 260 mV ILDO = 300mA, VLDO = 1.2V 450 615 mV Feedback Pin Input Current FB_Lx = 725mV –0.05 0.05 µA Rev. 0 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 Introduction Step-Down Switching Regulators Power On Sequencing Fault Detection and Reporting Applications Information Thermal Considerations and Board Layout Typical Applications Package Description Typical Application Related Parts