Electronic Components Datasheet Search |
|
LT1175CQ-5 Datasheet(PDF) 3 Page - Linear Technology |
|
LT1175CQ-5 Datasheet(HTML) 3 Page - Linear Technology |
3 / 12 page 3 LT1175 ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the operating temperature range, otherwise specifications are at TA = 25°C. VOUT = 5V, VIN = 7V, IOUT = 0, VSHDN = 3V, ILIM2 and ILIM4 tied to VIN, TJ = 25°C, unless otherwise noted. To avoid confusion with “min” and “max” as applied to negative voltages, all voltages are shown as absolute values except where polarity is not obvious. GND Pin Current Increase with Load (Note 4) q 10 20 µA/mA Input Supply Current in Shutdown VSHDN = 0V 10 20 µA q 25 µA Shutdown Thresholds (Note 9) Either Polarity On SHDN Pin q 0.8 2.5 V SHDN Pin Current (Note 2) VSHDN = 0V to 10V (Flows Into Pin) q 48 µA VSHDN = – 15V to 0V (Flows Into Pin) 1 4 µA Output Bleed Current in Shutdown (Note 6) VOUT = 0V, VIN = 15V 0.1 1 µA q 15 µA SENSE Pin Input Current (Adjustable Part Only, Current Flows Out of Pin) q 75 150 nA (Fixed Voltage Only, Current Flows Out of Pin) q 12 20 µA Dropout Voltage (Note 7) IOUT = 25mA q 0.1 0.2 V IOUT = 100mA q 0.18 0.26 V IOUT = 500mA q 0.5 0.7 V ILIM2 Open, IOUT = 300mA q 0.33 0.5 V ILIM4 Open, IOUT = 200mA q 0.3 0.45 V ILIM2, ILIM4 Open, IOUT = 100mA q 0.26 0.45 V Current Limit (Note 11) VIN – VOUT = 1V to 12V q 520 800 1300 mA ILIM2 Open q 390 600 975 mA ILIM4 Open q 260 400 650 mA ILIM2, ILIM4 Open q 130 200 325 mA Line Regulation (Note 10) VIN – VOUT = 1V to VIN = 20V q 0.003 0.015 %/V Load Regulation (Note 5, 10) IOUT = 0mA to 500mA q 0.1 0.35 % Thermal Regulation P = 0 to PMAX (Notes 3, 8) 5-Pin Packages 0.04 0.1 %/W 8-Pin Packages 0.1 0.2 %/W Output Voltage Temperature Drift TJ = 25°C to TJMIN, or 25°C to TJMAX 0.25 1.25 % PARAMETER CONDITIONS MIN TYP MAX UNITS VIN and VOUT. For currents between 100mA and 500mA, with both ILIM pins tied to VIN, maximum dropout can be calculated from VDO = 0.15 + 1.1Ω (IOUT). Note 8: Thermal regulation is a change in the output voltage caused by die temperature gradients, so it is proportional to chip power dissipation. Temperature gradients reach final value in less than 100ms. Output voltage changes after 100ms are due to absolute die temperature changes and reference voltage temperature coefficient. Note 9: The lower limit of 0.8V is guaranteed to keep the regulator in shutdown. The upper limit of 2.5V is guaranteed to keep the regulator active. Either polarity may be used, referenced to GND pin. Note 10: Load and line regulation are measured on a pulse basis with pulse width of 20ms or less to keep chip temperature constant. DC regulation will be affected by thermal regulation (Note 8) and chip temperature changes. Load regulation specification also holds for currents up to the specified current limit when ILIM2 or ILIM4 are left open. Note 11: Current limit is reduced for input-to-output voltage above 12V. See the graph in Typical Performance Characteristics for guaranteed limits above 12V. Note 12: Operating at very large input-to-output differential voltages (>15V) with load currents less than 5mA requires an output capacitor with an ESR greater than 1 Ω to prevent low level output oscillations. Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: SHDN pin maximum positive voltage is 30V with respect to –VIN and 13.5V with respect to GND. Maximum negative voltage is – 20V with respect to GND and – 5V with respect to – VIN. Note 3: PMAX = 1.5W for 8-pin packages, and 6W for 5-pin packages. This power level holds only for input-to-output voltages up to 12V, beyond which internal power limiting may reduce power. See Guaranteed Current Limit curve in Typical Performance Characteristics section. Note that all conditions must be met. Note 4: GND pin current increases because of power transistor base drive. At low input-to-output voltages (< 1V) where the power transistor is in saturation, GND pin current will be slightly higher. See Typical Performance Characteristics. Note 5: With ILOAD = 0, at TJ > 125°C, power transistor leakage could increase higher than the 10 µA to 25µA drawn by the output divider or fixed voltage SENSE pin, causing the output to rise above the regulated value. To prevent this condition, an internal active pull-up will automatically turn on, but supply current will increase. Note 6: This is the current required to pull the output voltage to within 1V of ground during shutdown. Note 7: Dropout voltage is measured by setting the input voltage equal to the normal regulated output voltage and measuring the difference between |
Similar Part No. - LT1175CQ-5 |
|
Similar Description - LT1175CQ-5 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |