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SC1537 Datasheet(PDF) 3 Page - Semtech Corporation |
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SC1537 Datasheet(HTML) 3 Page - Semtech Corporation |
3 / 7 page © 2000 SEMTECH CORP. 652 MITCHELL ROAD NEWBURY PARK CA 91320 700mA SmartLDO TM SC1537 PRELIMINARY - July 25, 2000 3 Parameter Symbol Test Conditions MIN TYP MAX Unit VAUX (Cont.) Reverse Leakage From VIN I VAUX VIN = 5.5V, VAUX = 0V, I O = 0mA -5.0 -50.0 µA - 100.0 5V Detect (1)(2)(3) Low Threshold Voltage V TH(LO) VIN Falling, I O = 20mA 3.92 4.05 4.18 V 3.90 4.20 Hysteresis V HYST 90 170 mV 80 High Threshold Voltage V TH(HI) VIN Rising, I O = 20mA 4.35 V VO LDO Output Voltage VO I O = 20mA 3.267 3.300 3.333 V 4.75V ≤ VIN ≤ 5.25V, 0mA ≤ I O ≤ 700mA 3.234 3.366 Output Current I O 400 mA Line Regulation REG (LINE) VIN = 4.75V to 5.25V 0.20 0.60 % 0.80 Load Regulation REG (LOAD) I O = 10mA to 700mA 0.6 1.0 % 1.2 Drive Output Drive Voltage V DR 4.75V ≤ VIN ≤ 5.25V, I DR = 200µA 3.4 VIN - 0.8 V 3.3 VIN < V TH(LO), IDR = -200µA 35 150 mV 250 Peak Drive Current I DR(PK) Sinking: VIN = 3.9V, V DR = 1V; 7 mA Sourcing: VIN = 4.35V, VIN - V DR = 2.5V 6 Drive High Delay (1)(4) t DH C DR = 1.2nF, VIN ramping up, measured 0.5 1.0 µs from VIN = V TH(HI) to VDR = 2V 2.0 Drive Low Delay (1)(4) t DL C DR = 1.2nF, VIN ramping down, measured 0.5 1.0 µs from VIN = V TH(LO) to VDR = 2V 2.0 ELECTRICAL CHARACTERISTICS Unless specified, T A = 25°C, VIN = 5V, VAUX = 3.3V, IO = 700mA, CO = 10µF. Values in bold apply over full operating temperature range. NOTES: (1) Guaranteed by design. (2) See 5V Detect Thresholds on page 5. (3) Recommended source impedance for 5V supply: ≤ 0.07Ω. This will ensure that I O x RSOURCE < VHYST, thus avoiding DR toggling during 5V detect threshold transitions. (4) See Timing Diagram on page 5. |
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