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UR3325 Schematic ( PDF Datasheet ) - Unisonic Technologies

Teilenummer UR3325
Beschreibung LINEAR INTEGRATED CIRCUIT
Hersteller Unisonic Technologies
Logo Unisonic Technologies Logo 




Gesamt 6 Seiten
UR3325 Datasheet, Funktion
UTCUR3325 LINEAR INTEGRATED CIRCUIT
2 CHANNEL LOW-DROPOUT
VOLTAGE REGULATOR
FEATURES
*Dual Output: 3.3V/1A, 2.5V/1A.
*Output Voltage Precision of ±2%.
*Output consists of PNP power transistor with
low-dropout voltage.
*Built-in over current protection circuit (OCP).
*Built-in Thermal Shut Down Circuit (TSD).
*Ideal for Hard Disk Drives applications.
1
TO-252-5
1: Vcc 2: NC 3: GND 4: Vo1 5: VO2
PIN DISCRIPTION
PIN NO.
PIN NAME
1 Vcc
2 N.C.
3 GND
4 Vo1
5 Vo2
Power Supply
Not internally connected
Ground
3.3V Output
2.5V Output
FUNCTION
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R102-017,C






UR3325 Datasheet, Funktion
UTCUR3325 LINEAR INTEGRATED CIRCUIT
serially as ESR. For the bypass capacitor, a 0.33μF capacitor placed as close to Vcc pin and GND pin as possible
is recommended.
Over- current Protection Circuit
The over-current protection circuits are built in at the outputs. They protect the IC from being damaged when the
load is short-circuited or subjected to an over current condition. This protection circuits perform holdback current
limiting.
Thermal Protection Circuit
A thermal shut down circuit (T.S.D.) is built into the IC to prevent damage due to overheating, Therefore, all the
outputs are turned off when the T.S.D. circuit is activated and are turned on when the temperature recedes to the
specified level. However, the T.S.D. circuit is only for extreme conditions and the regulator circuit should still be
designed for the IC not to exceed TJ(max)=150.
Grounding
It is recommended that every capacitor (bypass and output capacitors) is grounded to PIN3 using single-point
connections.
Electromagnetic Fields
The IC is susceptible to strong electromagnetic fields and may cause malfunction. Therefore, caution should be
used when placing it on the PCB.
Protection Diodes
It is recommended that protection diodes be used when the output is connected to an inductive load.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UTC
UNISONIC TECHNOLOGIES CO., LTD. 6
QW-R102-017,C

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