The TL2575 and TL2575HV devices provide all the active functions needed for a step-down (buck) switching regulator in an integrated circuit. They require four to six external components for operation. They accept a wide input-voltage range of up to 60 V (TL2575-HV) and are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, or an adjustable-output version. The TL2575 and TL2575HV devices have an integrated switch capable of delivering 1 A of load current, with excellent line and load regulation. The device also offers internal frequency compensation, a fixed-frequency oscillator, cycle-by-cycle current limiting, and thermal shutdown. In addition, a manual shutdown is available via an external ON/OFF pin.
Fixed 3.3-V, 5-V, 12-V, and 15-V Options with
±5% Regulation (Max) Over Line, Load, and
Temperature Conditions
Adjustable Option With a Range of 1.23 V to
37 V (57 V for HV Version) and ±4%
Regulation (Max) Over Line, Load, and Temperature
Conditions
Specified 1-A Output Current
Wide Input Voltage Range
4.75 V to 40 V (60 V for HV Version)
Requires Only Four External Components (Fixed Versions)
and Uses Readily Available Standard Inductors
52-kHz (Typ) Fixed-Frequency Internal Oscillator
TTL Shutdown Capability With 50-µA (Typ) Standby
Current
High Efficiency
As High as 88% (Typ)
Thermal Shutdown and Current-Limit Protection with
