Datasheet LTC1798 (Analog Devices) - 6
| Hersteller | Analog Devices |
| Beschreibung | Micropower Low Dropout References |
| Seiten / Seite | 10 / 6 — BLOCK DIAGRAM. APPLICATIONS INFORMATION Longer Battery Life. Output … |
| Dateiformat / Größe | PDF / 848 Kb |
| Dokumentensprache | Englisch |
BLOCK DIAGRAM. APPLICATIONS INFORMATION Longer Battery Life. Output Bypass Capacitor
Modelllinie für dieses Datenblatt
- LTC1798CS8-2.5#PBF LTC1798CS8-2.5#PBF LTC1798CS8-2.5#TRPBF LTC1798CS8-2.5#TRPBF LTC1798CS8-3#PBF LTC1798CS8-3#PBF LTC1798CS8-3#TRPBF LTC1798CS8-3#TRPBF LTC1798CS8-4.1#PBF LTC1798CS8-4.1#PBF LTC1798CS8-4.1#TRPBF LTC1798CS8-4.1#TRPBF LTC1798CS8-5#PBF LTC1798CS8-5#PBF LTC1798CS8-5#TRMPBF LTC1798CS8-5#TRPBF LTC1798CS8-5#TRPBF
Textversion des Dokuments
LTC1798 Series
BLOCK DIAGRAM
2 IN + OUT 6 – 2.385V R1 FB 3 (LTC1798) R2 GND 4 1798 BD NOTE: R1 AND R2 ARE NOT CONNECTED FOR LTC1798
APPLICATIONS INFORMATION Longer Battery Life
dissipates only 10.8µW when operating on a 2.7V supply Series references have an advantage over shunt style for LTC1798-2.5, yet the same connection can deliver references. To operate, shunt references require a resistor 10mA of load current when demanded. between the power supply and the output. This resistor
Output Bypass Capacitor
must be chosen to supply the maximum current that is demanded by the circuit being regulated. When the circuit The LTC1798 series is designed to be stable with or without being controlled is not operating at this maximum current, capacitive loads. With no capacitive load, the reference the shunt reference must always sink this current, resulting is ideal for fast settling applications, or where PC board in high power dissipation and short battery life. space is at a premium. The LTC1798 series low dropout references do not require In applications with significant output loading changes, an a current setting resistor and can operate with any supply output bypass capacitor of up to 1µF can be used to improve voltage from (VOUT(NOMINAL) + 0.2V) to 12.6V. When the the output transient response. Figure 1 shows the response circuitry being regulated does not demand current, the of the reference to a 1mA to 0µA load step with a 1µF output LTC1798 series reduces its dissipation and battery life is capacitor. If more than 1µF of output capacitance is required, extended. If the reference is not delivering load current it a resistor in series with the capacitor is recommended 1mA 1mA IOUT IOUT 0mA 0mA VOUT VOUT 100mV/DIV 100mV/DIV 1798 F01a 1798 F01b 10ms/DIV 0.5ms/DIV
Figure 1. Reference Output Load Transient Response, 1µF Output Capacitor
1798fc 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION AVAILABLE OPTIONS ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS
BLOCK DIAGRAM
2 IN + OUT 6 – 2.385V R1 FB 3 (LTC1798) R2 GND 4 1798 BD NOTE: R1 AND R2 ARE NOT CONNECTED FOR LTC1798
APPLICATIONS INFORMATION Longer Battery Life
dissipates only 10.8µW when operating on a 2.7V supply Series references have an advantage over shunt style for LTC1798-2.5, yet the same connection can deliver references. To operate, shunt references require a resistor 10mA of load current when demanded. between the power supply and the output. This resistor
Output Bypass Capacitor
must be chosen to supply the maximum current that is demanded by the circuit being regulated. When the circuit The LTC1798 series is designed to be stable with or without being controlled is not operating at this maximum current, capacitive loads. With no capacitive load, the reference the shunt reference must always sink this current, resulting is ideal for fast settling applications, or where PC board in high power dissipation and short battery life. space is at a premium. The LTC1798 series low dropout references do not require In applications with significant output loading changes, an a current setting resistor and can operate with any supply output bypass capacitor of up to 1µF can be used to improve voltage from (VOUT(NOMINAL) + 0.2V) to 12.6V. When the the output transient response. Figure 1 shows the response circuitry being regulated does not demand current, the of the reference to a 1mA to 0µA load step with a 1µF output LTC1798 series reduces its dissipation and battery life is capacitor. If more than 1µF of output capacitance is required, extended. If the reference is not delivering load current it a resistor in series with the capacitor is recommended 1mA 1mA IOUT IOUT 0mA 0mA VOUT VOUT 100mV/DIV 100mV/DIV 1798 F01a 1798 F01b 10ms/DIV 0.5ms/DIV
Figure 1. Reference Output Load Transient Response, 1µF Output Capacitor
1798fc 6 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION AVAILABLE OPTIONS ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM APPLICATIONS INFORMATION PACKAGE DESCRIPTION REVISION HISTORY TYPICAL APPLICATION RELATED PARTS