Datasheet LT1175 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | 500mA Negative Low Dropout Micropower Regulator |
| Seiten / Seite | 20 / 1 — FEATURES. DESCRIPTION. Operating Current: 45μA. Adjustable Current Limit. … |
| Dateiformat / Größe | PDF / 221 Kb |
| Dokumentensprache | Englisch |
FEATURES. DESCRIPTION. Operating Current: 45μA. Adjustable Current Limit. Low Voltage Linear Dropout Characteristics
Modelllinie für dieses Datenblatt
- LT1175CN8#PBF LT1175CN8-5#PBF LT1175CQ#PBF LT1175CQ#TRPBF LT1175CQ-5#PBF LT1175CQ-5#TRPBF LT1175CS8#PBF LT1175CS8#TRPBF LT1175CS8-5#PBF LT1175CS8-5#TRPBF LT1175CST-5#PBF LT1175CST-5#TRPBF LT1175CT#06PBF LT1175CT#PBF LT1175CT-5#06PBF LT1175CT-5#PBF LT1175IN8#PBF LT1175IN8-5#PBF LT1175IQ#PBF LT1175IQ#TRPBF LT1175IQ-5#PBF LT1175IQ-5#TRPBF LT1175IS8#PBF LT1175IS8#TRPBF LT1175IS8-5#PBF LT1175IS8-5#TRPBF LT1175IST-5#PBF LT1175IST-5#TRPBF LT1175IT#PBF LT1175IT-5#PBF LT1175MPQ#PBF LT1175MPQ#TR LT1175MPQ#TRPBF LT1175MPQ-5 LT1175MPQ-5#PBF LT1175MPQ-5#TRPBF LT1175MPS8#PBF LT1175MPS8#TRPBF LT1175MPS8-5 LT1175MPS8-5#PBF LT1175MPS8-5#TRPBF
Textversion des Dokuments
LT1175 500mA Negative Low Dropout Micropower Regulator
FEATURES DESCRIPTION
n
Operating Current: 45μA
The LT®1175 is a negative micropower low dropout n
Adjustable Current Limit
regulator. It features 45μA quiescent current, dropping n
Low Voltage Linear Dropout Characteristics
to 10μA in shutdown. A new reference amplifi er topology n Stable with Wide Range of Output Capacitors gives precision DC characteristics along with the ability to n Shutdown Current: 10μA maintain good loop stability with an extremely wide range n Positive or Negative Shutdown Logic of output capacitors. Very low dropout voltage and high n Fixed 5V and Adjustable Versions effi ciency are obtained with a unique power transistor n Tolerates Reverse Output Voltage anti-saturation design. Adjustable and fi xed 5V versions n Available in 8-pin PDIP and SO Packages, 3-lead are available. SOT-223, 5-Pin Surface Mount DD and Through-Hole Several new features make the LT1175 very user-friendly. TO-220 Packages The SHDN pin can interface directly to either positive or negative logic levels. Current limit is user-selectable at
APPLICATIONS
200mA, 400mA, 600mA and 800mA. The output can be forced to reverse voltage without damage or latchup. Un- n Analog Systems like some earlier designs, the increase in quiescent current n Modems during a dropout condition is actively limited. n Instrumentation n A/D and D/A Converters The LT1175 has complete blowout protection with current n Interface Drivers limiting, power limiting and thermal shutdown. Special n Battery-Powered Systems attention was given to the problem of high temperature L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear operation with micropower operating currents, preventing Technology Corporation. All other trademarks are the property of their respective owners. output voltage rise under no-load conditions. The LT1175 is available in 8-pin PDIP and SO packages, 3-lead SOT- 223 as well as 5-pin surface mount DD and through-hole TO-220 packages. The 8-pin SO package is specially constructed for low thermal resistance.
TYPICAL APPLICATION Minimum Input-to-Output Voltage
1.0
Typical LT1175 Connection
TJ = 25°C ILIM2, ILIM4 TIED TO VIN 0.8 + + C C OUT IN* ≥ 0.1μF 0.6 SHDN GND –5V –VIN VIN SENSE UP TO 500mA 0.4 I LT1175-5 LIM2 ILIM4 OUTPUT 0.2 INPUT-TO-OUTPUT VOLTAGE (V) *CIN IS NEEDED ONLY IF REGULATOR IS MORE THAN 6" FROM INPUT SUPPLY CAPACITOR. SEE APPLICATIONS INFORMATION 0 SECTION FOR DETAILS 1175 TA01 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 OUTPUT CURRENT (A) 1175 TA02 1175ff 1
FEATURES DESCRIPTION
n
Operating Current: 45μA
The LT®1175 is a negative micropower low dropout n
Adjustable Current Limit
regulator. It features 45μA quiescent current, dropping n
Low Voltage Linear Dropout Characteristics
to 10μA in shutdown. A new reference amplifi er topology n Stable with Wide Range of Output Capacitors gives precision DC characteristics along with the ability to n Shutdown Current: 10μA maintain good loop stability with an extremely wide range n Positive or Negative Shutdown Logic of output capacitors. Very low dropout voltage and high n Fixed 5V and Adjustable Versions effi ciency are obtained with a unique power transistor n Tolerates Reverse Output Voltage anti-saturation design. Adjustable and fi xed 5V versions n Available in 8-pin PDIP and SO Packages, 3-lead are available. SOT-223, 5-Pin Surface Mount DD and Through-Hole Several new features make the LT1175 very user-friendly. TO-220 Packages The SHDN pin can interface directly to either positive or negative logic levels. Current limit is user-selectable at
APPLICATIONS
200mA, 400mA, 600mA and 800mA. The output can be forced to reverse voltage without damage or latchup. Un- n Analog Systems like some earlier designs, the increase in quiescent current n Modems during a dropout condition is actively limited. n Instrumentation n A/D and D/A Converters The LT1175 has complete blowout protection with current n Interface Drivers limiting, power limiting and thermal shutdown. Special n Battery-Powered Systems attention was given to the problem of high temperature L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear operation with micropower operating currents, preventing Technology Corporation. All other trademarks are the property of their respective owners. output voltage rise under no-load conditions. The LT1175 is available in 8-pin PDIP and SO packages, 3-lead SOT- 223 as well as 5-pin surface mount DD and through-hole TO-220 packages. The 8-pin SO package is specially constructed for low thermal resistance.
TYPICAL APPLICATION Minimum Input-to-Output Voltage
1.0
Typical LT1175 Connection
TJ = 25°C ILIM2, ILIM4 TIED TO VIN 0.8 + + C C OUT IN* ≥ 0.1μF 0.6 SHDN GND –5V –VIN VIN SENSE UP TO 500mA 0.4 I LT1175-5 LIM2 ILIM4 OUTPUT 0.2 INPUT-TO-OUTPUT VOLTAGE (V) *CIN IS NEEDED ONLY IF REGULATOR IS MORE THAN 6" FROM INPUT SUPPLY CAPACITOR. SEE APPLICATIONS INFORMATION 0 SECTION FOR DETAILS 1175 TA01 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 OUTPUT CURRENT (A) 1175 TA02 1175ff 1