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LTM2887 Datasheet(PDF) 4 Page - Linear Technology |
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LTM2887 Datasheet(HTML) 4 Page - Linear Technology |
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4 / 38 page  LTM2887 4 2887fb For more information www.linear.com/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 LTM2887-5 l l 3 4.5 3.3 5 3.6 5.5 V V VL Logic Supply Range LTM2887-S LTM2887-I l l 1.62 3 5 5.5 5.5 V V ICC Input Supply Current ON = 0V LTM2887-3, ON = VL, No Load LTM2887-5, ON = VL, No Load l l l 0 25 19 10 30 25 µA mA mA IL Logic Supply Current ON = 0V LTM2887-S, ON = VL LTM2887-I, ON = VL l 0 10 10 150 µA µA 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 Limit VCC2 = 5V, R(IVCC2 to GND2) = 2.26k VCC2 = 5V, R(IVCC2 to GND2) = 1.5k VCC2 = 5V, R(IVCC2 to GND2) = 1.15k l l l 49 71 91 53 79 103 57 87 115 mA mA mA VL2 Regulated Output Voltage No Load, AVL2 Open l 4.75 5 5.25 V Output Voltage Operating Range LTM2887-I (Note 2) LTM2887-S (Note 2) 3 1.8 5.5 5.5 V 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 Limit VL2 = 5V, R(IVL2 to GND2) = 2.26k VL2 = 5V, R(IVL2 to GND2) = 1.5k VL2 = 5V, R(IVL2 to GND2) = 1.15k l l l 49 71 91 53 79 103 57 87 115 mA mA mA Logic/SPI VITH Input Threshold Voltage ON, DI1, SDOE, SCK, SDI, CS 1.62V ≤ VL < 2.35V ON, DI1, SDOE, SCK, SDI, CS 2.35V ≤ VL I1, I2, SDO2 l l l 0.25 • VL 0.33 • VL 0.33 • VL2 0.75 • VL 0.67 • VL 0.67 • VL2 V V V IINL Input Current l ±1 µA |
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