Abstract: A hot swap controller includes a shunt resistor (32-1,2) and a power transistor (37-1,2) having a source coupled to a load maintains the first power transistor in a fully-turned-on condition to cause it to deliver a load current contribution (IL1,2) which flows through the shunt resistor and the power transistor to the load (25). Current sensing circuitry (35-1,2) produces a first control signal (V45-1,2-V47-1,2) equal to the difference between a DC component (V47-1) proportional to a first load current contribution (IL1) flowing in the first shunt resistor and a feedback-based component (V45-1). A control amplifier (49-1,2) produces a second control signal (V51-1,2) in response to the first control signal to modify a drive signal (53-1) to the power transistor so as to reduce a channel resistance of the power transistor if the first control signal exceeds a predetermined level.

Abstract: An integrated circuit package that comprises a lead frame, an integrated circuit located on the lead frame and a shunt resistor coupled to the lead frame and to the integrated circuit. The shunt resistor has a lower temperature coefficient of resistance than the lead frame, and the lead frame has a lower resistivity than the shunt resistor. The shunt resistor has a low-resistance coupling to external leads of the lead frame, or, the shunt resistor has its own integrated external leads.

Abstract: An integrated circuit package that comprises a lead frame, an integrated circuit located on the lead frame and a shunt resistor coupled to the lead frame and to the integrated circuit. The shunt resistor has a lower temperature coefficient of resistance than the lead frame, and the lead frame has a lower resistivity than the shunt resistor. The shunt resistor has a low-resistance coupling to external leads of the lead frame, or, the shunt resistor has its own integrated external leads.

Abstract: A differential amplifier (1D) includes circuitry (5,R1,R2,52) coupling a common mode component of an input voltage (Vin+?Vin?) to a maximum voltage selector circuit (53) that produces an internal voltage (VRAIL-TOP) equal to the larger of a first supply voltage (VREG) and the common mode component. An input amplifier circuit (46) of the differential amplifier is powered by the internal voltage. The input voltage (Vin+?Vin?) is coupled to inputs (41A,B) of the input amplifier circuit (46). Outputs (64A,B) of the input amplifier circuit (46) are amplified by an output amplifier (50).

Abstract: An integrated circuit current shunt amplifier (2A) includes an amplifier (9) having a (+) input connected to a first terminal (5A) of a shunt resistor (RSHUNT). An output transistor (24) has a gate coupled to an output of the amplifier, a source coupled to a (?) input of the amplifier, and a drain coupled to a first terminal of an output resistor (ROUT). A gain resistor (RGAIN) is coupled between the (?) input of the amplifier and a second terminal of the shunt resistor. The gain resistor has a temperature coefficient which is essentially the same as that of the shunt resistor. A voltage regulator (26) can be coupled between the second terminal of the shunt resistor and a low-side supply voltage terminal (27) of the amplifier. A charge pump (30) can provide a below-ground voltage on a second terminal of the output resistor. A difference amplifier (31) coupled to the drain and referenced to the below-ground voltage produces an output voltage (Vout) referenced to ground.

Abstract: An integrated circuit current shunt amplifier (2A) includes an amplifier (9) having a (+) input connected to a first terminal (5A) of a shunt resistor (RSHUNT). An output transistor (24) has a gate coupled to an output of the amplifier, a source coupled to a (?) input of the amplifier, and a drain coupled to a first terminal of an output resistor (ROUT). A gain resistor (RGAIN) is coupled between the (?) input of the amplifier and a second terminal of the shunt resistor. The gain resistor has a temperature coefficient which is essentially the same as that of the shunt resistor. A voltage regulator (26) can be coupled between the second terminal of the shunt resistor and a low-side supply voltage terminal (27) of the amplifier. A charge pump (30) can provide a below-ground voltage on a second terminal of the output resistor. A difference amplifier (31) coupled to the drain and referenced to the below-ground voltage produces an output voltage (Vout) referenced to ground.

Abstract: A hot swap controller includes a shunt resistor (32-1,2) and a power transistor (37-1,2) having a source coupled to a load maintains the first power transistor in a fully-turned-on condition to cause it to deliver a load current contribution (I1,2) which flows through the shunt resistor and the power transistor to the load (25). Current sensing circuitry (35-1,2) produces a first control signal (V45-1,2-V47-1,2) equal to the difference between a DC component (V47-1) proportional to a first load current contribution (IL1) flowing in the first shunt resistor and a feedback-based component (V45-1). A control amplifier (49-1,2) produces a second control signal (V51-1,2) in response to the first control signal to modify a drive signal (53-1) to the power transistor so as to reduce a channel resistance of the power transistor if the first control signal exceeds a predetermined level.

Abstract: A differential amplifier (1D) includes circuitry (5,R1,R2,52) coupling a common mode component of an input voltage (Vin+?Vin?) to a maximum voltage selector circuit (53) that produces an internal voltage (VRAIL-TOP) equal to the larger of a first supply voltage (VREG) and the common mode component. An input amplifier circuit (46) of the differential amplifier is powered by the internal voltage. The input voltage (Vin+?Vin?) is coupled to inputs (41A,B) of the input amplifier circuit (46). Outputs (64A,B) of the input amplifier circuit (46) are amplified by an output amplifier (50).