Datasheet LTM2887 (Analog Devices) - 4

LTM2887
ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the specified operating temperature range, otherwise specifications are at TA = 25°C. LTM2887-3 VCC = 3.3V, LTM2887-5 VCC = 5V, VL = 3.3V, and GND = GND2 = 0V, ON = VL unless otherwise noted. Specifications apply to all options unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Input Supplies
VCC Input Supply Range LTM2887-3 l 3 3.3 3.6 V LTM2887-5 l 4.5 5 5.5 V VL Logic Supply Range LTM2887-S l 1.62 5.5 V LTM2887-I l 3 5 5.5 V ICC Input Supply Current ON = 0V l 0 10 µA LTM2887-3, ON = VL, No Load l 25 30 mA LTM2887-5, ON = VL, No Load l 19 25 mA IL Logic Supply Current ON = 0V l 0 10 µA LTM2887-S, ON = VL 10 µA LTM2887-I, ON = VL 150 µA
Output Supplies
VCC2 Regulated Output Voltage No Load, AVCC2 Open l 4.75 5 5.25 V Output Voltage Operating Range (Note 2) 0.6 5.5 V Line Regulation ILOAD = 1mA, MIN ≤ VCC ≤ MAX l 1 6 mV Load Regulation ILOAD = 1mA to 100mA l 45 150 mV ADJ Pin Voltage ILOAD = 1mA to 100mA l 540 580 620 mV Voltage Ripple ILOAD = 100mA (Note 2) 1 mVRMS Efficiency LTM2887-5, ILOAD = 100mA (Note 2) 62 % ICC2 Output Short Circuit Current VCC2 = 0V, IVCC2 = 0V 200 mA Internal Current Limit ΔVCC2 = –5%, IVCC2 = 0V l 100 mA External Programmed Current VCC2 = 5V, R(IVCC2 to GND2) = 2.26k l 49 53 57 mA Limit VCC2 = 5V, R(IVCC2 to GND2) = 1.5k l 71 79 87 mA VCC2 = 5V, R(IVCC2 to GND2) = 1.15k l 91 103 115 mA VL2 Regulated Output Voltage No Load, AVL2 Open l 4.75 5 5.25 V Output Voltage Operating Range LTM2887-I (Note 2) 3 5.5 V LTM2887-S (Note 2) 1.8 5.5 V Line Regulation ILOAD = 1mA, MIN ≤ VCC ≤ MAX l 0.25 3 mV Load Regulation ILOAD = 1mA to 100mA l 25 100 mV ADJ Pin Voltage ILOAD = 1mA to 100mA l 540 580 620 mV Voltage Ripple ILOAD = 100mA (Note 2) 1 mVRMS Efficiency LTM2887-5, ILOAD = 100mA (Note 2) 62 % IL2 Output Short Circuit Current VL2 = 0V, IVL2 = 0V 200 mA Current Limit ΔVL2 = –5%, IVL2 = 0V l 100 mA External Programmed Current VL2 = 5V, R(IVL2 to GND2) = 2.26k l 49 53 57 mA Limit VL2 = 5V, R(IVL2 to GND2) = 1.5k l 71 79 87 mA VL2 = 5V, R(IVL2 to GND2) = 1.15k l 91 103 115 mA
Logic/SPI
VITH Input Threshold Voltage ON, DI1, SDOE, SCK, SDI, CS 1.62V ≤ VL < 2.35V l 0.25 • VL 0.75 • VL V ON, DI1, SDOE, SCK, SDI, CS 2.35V ≤ VL l 0.33 • VL 0.67 • VL V I1, I2, SDO2 l 0.33 • VL2 0.67 • VL2 V IINL Input Current l ±1 µA 2887fb 4 For more information www.linear.com/LTM2887 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Product Selection Guide Order Information Electrical Characteristics Switching Characteristics Isolation Characteristics Typical Performance Characteristics Pin Functions Block Diagrams Test Circuits Applications Information Typical Applications Package Description Revision History Typical Application Related Parts