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P1583 Datasheet Preview

P1583 Datasheet

2.5A STEP-DOWN SWITCHING REGULATOR

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UNISONIC TECHNOLOGIES CO., LTD
P1583
Preliminary
LINEAR INTEGRATED CIRCUIT
380KHz, 2.5A STEP-DOWN
SWITCHING REGULATOR
DESCRIPTION
The UTC P1583 is a fixed 380kHz frequency, current mode, PWM
controller. It achieves 2.5A 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 P1583 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 4 to 24V 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. An
internal soft-start prevents the output voltage from overshoot as well as
limiting the input current. 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 P1583 provides fast transient respond and requires very few
external devices for operation.
FEATURES
* 2.5A output current
* 380kHz frequency of operation
* 4V to 24V input voltage range
* 25μA shutdown supply current
* Output adjustable from 1.22 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
Lead Free
Halogen Free
P1583L-SH2-R
P1583G-SH2-R
Package
HSOP-8
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 5
QW-R103-071.a
Free Datasheet http://www.Datasheet4U.com




UTC

P1583 Datasheet Preview

P1583 Datasheet

2.5A STEP-DOWN SWITCHING REGULATOR

No Preview Available !

P1583
Preliminary
PIN CONFIGURATION
BS 1
IN 2
SW 3
GND 4
GND
LINEAR INTEGRATED CIRCUIT
8 SS
7 EN
6 COMP
5 FB
PIN DESCRIPTION
PIN NO.
1
2
3
4
5
6
7
8
PIN NAME
BS
IN
SW
GND
FB
COMP
EN
SS
DESCRIPTION
Supply pin to the power transistor driver.
Power supply pin.
Power switch output pin.
Ground pin.
The output voltage feedback pin. It is also the inverting input of the error amplifier.
Compensation pin.
Regulator On/Off control pin.
Soft start control input.
BLOCK DIAGRAM
EN
7
IN
2
COMP 6
FB 5
SS 8
Reference
1.22V
+ EA
-
UVLO
+PWM
-
OTP
+
+
Slope COMP
S
Q
R
Current Sense
+
-
Driver
UVLO
Slope COMP
UVLO
Slope COMP
40K-380KHz
Rsense
1 BS
Power
Transistor
3 SW
4 GND
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
2 of 5
QW-R103-071.a
Free Datasheet http://www.Datasheet4U.com


Part Number P1583
Description 2.5A STEP-DOWN SWITCHING REGULATOR
Maker UTC
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P1583 Datasheet PDF






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