Description:

The device combines a dual operational amplifier and afixed 2.5-V shunt voltage reference, which are often usedin the control circuitry of power supplies.The operational amplifier A has the non-inverting inputinternally tied to the shunt reference which is used forthe voltage control loop. The operational amplifier B isindependent of the current control loop.The device has a 220-μA power supply excluding thecurrent in the reference, and the minimum working currentfor the reference is 50 μA, which can be used in low-powerapplications.

Features:

• Operational Amplifier

– Supply Voltage: 3 V to 36 V

– Low Supply Current: 220 μA (Max)

– Input Rail to −VS, Rail-to-Rail Output

– Excellent High-Frequency PSRR+: 65 dB at 100kHz

– Offset Voltage of TPA7252/7252A: ±4 mV at 25°C(Max)

– Offset Voltage of TPA7253/7253A: ±2 mV at 25°C(Max)

• Voltage Reference

– 2.5-V Output, Stable with No Load to 1-μF Load

– TPA7252/7253: 1% Initial Accuracy

– TPA7252A/7253A: 0.4% Initial Accuracy

• Operating Temperature Range: −40°C to 125°C

Applications:

• Power Module

• Adapter

• Led Lighting