LT1580 查看數據表（PDF） - Linear Technology

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产品描述 (功能)

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LT1580

7A, Very Low Dropout Regulator

Linear Technology 

TYPICAL PERFORMANCE CHARACTERISTICS

LT1580/LT1580 -2.5

LT1580 Reference Voltage

vs Temperature

1.258

1.256

1.254

1.252

1.250

1.248

1.246

1.244

1.242

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

1580 G04

LT1580-2.5 Output Voltage

vs Temperature

2.508

Load Current Step Response

2.506

2.504

VOUT

50mV/DIV

2.502

2.500

2.498

7A

LOAD

2.496

2.494

400mA

50µs/DIV

1580 TA02

2.492

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

1580 G05

PIN FUNCTIONS (5-Lead/7-Lead)

SENSE (Pin 1): This pin is the positive side of the reference

voltage for the device. With this pin it is possible to Kelvin

sense the output voltage at the load.

ADJ (Pin 2/5): This pin is the negative side of the

reference voltage for the device. Transient response can

be improved by adding a small bypass capacitor from the

ADJ pin to ground. For fixed voltage devices the ADJ pin

is also brought out to allow the user to add a bypass

capacitor.

GND (Pin 2, 7-Lead Only): For fixed voltage devices this

is the bottom of the resistor divider that sets the output

voltage.

VPOWER (Pin 5/6): This is the collector to the power device

of the LT1580. The output load current is supplied through

this pin. For the device to regulate, the voltage at this pin

must be between 0.1V and 0.8V greater than the output

voltage (see Dropout specifications).

VCONTROL (Pin 4/3): This pin is the supply pin for the

control circuitry of the device. The current flow into this

pin will be about 1% of the output current. For the device

to regulate, the voltage at this pin must be between 1.0V

and 1.3V greater than the output voltage (see Dropout

specifications).

VOUT (Pin 3/4): This is the power output of the device.

5

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