LT8709EFE TSSOP-20-EP DC-DC control chip ADI original stock
describe
LT ® 8709 is a synchronous PWM controller positive to negative or negative positive DC/DC conversion with rail rail output current monitoring and control. LT8709 is an ideal design for many local power sources. It can be easily configured as a buck, boost, buck, and reverse topology with negative input voltage.
In addition, the rail to rail output current sensing of LT8709 allows this component to be configured in current limited applications such as battery or capacitor charging. PG pin is used for indicating good power.
The switching frequency range of lt8709 can be limited to between 100 kHz and 750 kHz. This component can be synchronized from the RT pin to the - VIN pin at the frequency set by the resistor, or to an external clock.
The LT8709 also features an innovative EN/FBIN pin circuit that allows for slow changing input signals and an adjustable undervoltage locking function. It is recommended to adjust the input voltage to avoid the collapse of high impedance input power supply. Other functions such as frequency folding rollback, thermal shutdown, and soft start are integrated. LT8709 has a 20 lead TSSOP package.
feature
Wide negative input range: -4.5V to -80V
N-rail to rail output current monitoring and control
Input voltage regulation for n high impedance inputs
N Power supply good indication pin
Mode pin for forced CCM (continuous conduction)
Mode) or pulse skip/DCM (discontinuous conduction mode) operation
Switching frequency up to 750kHz
N can be easily configured as step-down, boost, step-down boost, or
Inverter converter with single feedback pin
N can synchronize with external clocks
N High gain EN/FIN pins accept slowly changing inputs
signal
N 20 Lead TSSOP Package
application
High power negative input, negative output power
supplies
High power negative input, positive output power
supplies
Telecommunication equipment power supply
LT ® 8709 is a synchronous PWM controller positive to negative or negative positive DC/DC conversion with rail rail output current monitoring and control. LT8709 is an ideal design for many local power sources. It can be easily configured as a buck, boost, buck, and reverse topology with negative input voltage.
In addition, the rail to rail output current sensing of LT8709 allows this component to be configured in current limited applications such as battery or capacitor charging. PG pin is used for indicating good power.
The switching frequency range of lt8709 can be limited to between 100 kHz and 750 kHz. This component can be synchronized from the RT pin to the - VIN pin at the frequency set by the resistor, or to an external clock.
The LT8709 also features an innovative EN/FBIN pin circuit that allows for slow changing input signals and an adjustable undervoltage locking function. It is recommended to adjust the input voltage to avoid the collapse of high impedance input power supply. Other functions such as frequency folding rollback, thermal shutdown, and soft start are integrated. LT8709 has a 20 lead TSSOP package.
feature
Wide negative input range: -4.5V to -80V
N-rail to rail output current monitoring and control
Input voltage regulation for n high impedance inputs
N Power supply good indication pin
Mode pin for forced CCM (continuous conduction)
Mode) or pulse skip/DCM (discontinuous conduction mode) operation
Switching frequency up to 750kHz
N can be easily configured as step-down, boost, step-down boost, or
Inverter converter with single feedback pin
N can synchronize with external clocks
N High gain EN/FIN pins accept slowly changing inputs
signal
N 20 Lead TSSOP Package
application
High power negative input, negative output power
supplies
High power negative input, positive output power
supplies
Telecommunication equipment power supply
Cathodic protection power supply
