UNISONIC TECHNOLOGIES CO., LTD

P2583

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2012 Unisonic Technologies Co., Ltd

QW-R103-052.C

380KHz, 3A STEP-DOWN

SWITCHING REGULATOR

DESCRIPTION

The UTC P2583 is a fixed 380kHz frequency, current mode, PWM

controller with an internal power MOSFET. It achieves 3A continuous

output current over a wide input supply range with excellent load and line

regulation. Equipped with an external compensation pin, this device offers

user flexibility in determining loop dynamic.

The UTC P2583 integrates controls, monitoring and protection

functions into a single 8-pin package to provide a low cost and perfect

power solution. The device provides wide 3.6V to 28V operating input

range, also highly efficient with peak operating efficiency at 90%.

An Under- Voltage-Lock-Output (UVLO) circuit monitors the Vin supply

voltage to prevent wrong logic controls. An internal 1.222V reference

provides low output voltage down to 1.22V for further applications. The

controller’s over-current protection monitors the output current by using the

voltage drop across a current sensing resistor. Additional under voltage

protections monitor the voltage on FB pin for short-circuit protections.

The UTC P2583 provides fast transient respond and requires very few

external devices for operation.

FEATURES

* 3A Output Current

* 380kHz frequency of operation

* 3.6V to 28V Input Voltage Range

* 25μA Shutdown Supply Current

* Output Adjustable from 1.22V to 21V

* Frequency FoldBack at Short Circuit

* Thermal Shutdown

* Under Voltage Lock Output

* Current Mode with Low ESR Output Ceramic Capacitors

* Up to 90% Efficiency

ORDERING INFORMATION

Ordering Number

Package

Packing

Lead Free

Halogen Free

P2583L-S08-R

P2583G-S08-R

SOP-8

Tape Reel

P2583L-S08-T

P2583G-S08-T

SOP-8

Tube

P2583G-S08-R

(1)Packing Type

(2)Package Type

(1) R: Tape Reel, T: Tube

(2) S08: SOP-8

(3) G: Halogen Free, L: Lead Free

(3)Halogen Free

PIN CONFIGURATION