P1595L-AB5-R datasheet(4/6 Pages) UTC

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P1595

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 6

www.unisonic.com.tw

QW-R103-047.C

TYPICAL APPLICATION CIRCUIT

Adjustable Output Voltage Version

VOUT=VFB×

⎟

⎠

⎞

⎜

⎝

⎛ +

1, VFB=0.75V. R2=0.75K~4K

Resistor select for output voltage setting

VOUT

1.2K

6.8K

3.3V

6.8K

2.5V

4.7K

1.8V

1.5V

1.3V

1.5K

1.2V

1.2K

L1 recommend value (VIN=12V, IOUT=1.5A,)

VOUT

1.8 V

2.5V

3.3V

L1 Value

22μH

33μH

FUNCTION DESCRIPTIONS

Pin Functions

Vcc

It provides the IC switching regulator with positive input supply. This pin is used to supply the switching currents

needed by the regulator and a suitable input bypass capacitor must be connected at this pin.

GND

Circuit ground.

Internal switch. The voltage at this pin switches between (+VCC-VSAT) and approximately-0.5V, with a duty cycle of

approximately VOUT / VCC. To minimize coupling to sensitive circuitry, you should minimize the PC board copper area

connected to this pin.

Feedback

Senses the regulated output voltage to complete the feedback loop.

Using logic level signals to allow the switching regulator circuit to be shutdown, which dropping the total input

supply current to approximately 10uA. Shut the regulator down through pulling this pin below a threshold voltage of

approximately 0.5V, turn the regulator on through pulling this pin above 2.0V (up to VCC MAX).

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