LADLD30 UTC [Unisonic Technologies], LADLD30 Datasheet

LADLD30

Manufacturer Part Number

LADLD30

Description

0.8V REFERENCE ULTRA LOW DROPOUT LINEAR REGULATOR

Manufacturer

UTC [Unisonic Technologies]

Datasheet

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LADLD30

0.8V REFERENCE ULTRA LOW

DROPOUT LINEAR REGULATOR

dropout voltage as low as 0.25V at output current 3A.

called control voltage from other equipment can shutdown the output

voltage and it should pull and hold the voltage of EN pin less than 0.3V.

Another one is the main supply voltage whose purpose is for main power

conversion, to keep the power dissipation low, and to make the dropout

voltage lower.

be seen in the block figure to prevent the IC from being damaged.

Internal Power-On-Reset (POR) circuit can control the tow supply

voltages to prevent fault operations of the circuit; the thermal shutdown

circuit is able to protect the device from over thermal operation, and a

current limit function will keep the device work safely under current

over-loads.

voltage in the applications, such as front-side-bus termination on

motherboard, NB applications, front side bus V

book PC applications.

* Low Dropout V

* Low ESR Output Capacitor

* V

* ±1.5% over Line, Load and Temperature Output Accuracy

* Fast Transient Response

* Output Voltage Adjustable through External Resistors

* POR(Power-On-Reset) controlling V

* With internal Soft-Start

* Internal Current Limit Protection

* Internal Under Voltage Protection

* Hysteretic Thermal Shutdown

* With Power-OK Output (with a Delay Time)

* For Standby or Suspend Mode: Shutdown

xx: Output Voltage, refer to Marking Information.

www.unisonic.com.tw

REF

The UTC LADLD30 is a typical LDO with the features of very low

For normal operation, tow supply voltages are necessary. One

Internally, in the UTC LADLD30, there’re many functions which can

The UTC LADLD30 can be used as an ideal to provide well supply

ORDERING INFORMATION

DESCRIPTION

FEATURES

LADLD30L-SH2-R

=0.8V

Lead Free

=0.25V(typ.)@ I

UNISONIC TECHNOLOGIES CO., LTD

Ordering Number

OUT

LADLD30G-SH2-R

=3A

Halogen Free

CNTL

and V

Preliminary

(1.2V/3A) and note

Package

HSOP-8

Tape Reel

Packing

CMOS IC

HSOP-8

QW-R502-330.c

1 of 8

Related parts for LADLD30

LADLD30 Summary of contents

Page 1

... REFERENCE ULTRA LOW DROPOUT LINEAR REGULATOR DESCRIPTION The UTC LADLD30 is a typical LDO with the features of very low dropout voltage as low as 0.25V at output current 3A. For normal operation, tow supply voltages are necessary. One called control voltage from other equipment can shutdown the output voltage and it should pull and hold the voltage of EN pin less than 0 ...

Page 2

... LADLD30 MARKING INFORMATION Date Code UTC LADLD30 PIN CONFIGURATION PIN DESCRIPTION PIN NO. PIN NAME 1 GND Ground pin. There’s an external resistor divider connected to this pin which is necessary to give the feedback voltage to the regulator. The external circuit is combined as the follow: between V the load transient response),and between FB and ground is R2.The value of R2 and ...

Page 3

... LADLD30 BLOCK DIAGRAM 0.4V - EAMP + V REF 0. 90% V REF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Preliminary V EN CNTL Power On Reset Soft-Start and UV Control Logic Thermal Limit Current Limit Dealy POK GND CMOS OUT POK QW-R502-330.c ...

Page 4

... LADLD30 ABSOLUTE MAXIMUM RATING PARAMETER Supply Voltage (V to GND) CNTL Supply Voltage (V to GND and FB to GND POK to GND Power Dissipation Junction Temperature Storage Temperature Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ...

Page 5

... LADLD30 ELECTRICAL CHARACTERISTICS(Cont.) PARAMETER Over Temperature Shutdown Over Temperature Hysteresis Under-Voltage Threshold EN Logic High Threshold Voltage EN Hysteresis EN Pin Pull-Up Current Soft-Start Interval POK Threshold Voltage for Power OK POK Threshold Voltage for Power Not OK POK Low Voltage POK Delay Time UNISONIC TECHNOLOGIES CO., LTD www ...

Page 6

... LADLD30 TYPICAL APPLICATION CIRCUIT 1. Using an Output Capacitor with ESR≥18mΩ 2. Using an MLCC as the Output Capacitor C =1µF CNTL POK 7 POK Enable V (V) OUT 1.05 1.5 1.8 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Preliminary R3=1kΩ V +5V CNTL 6 V CNTL +1. =22µ OUT ...

Page 7

... Because the limited slew rate of the surge currents, more parasitic inductance needs more input capacitance. Ultra-low-ESR capacitors ( > 100mF, ESR < 300mW) is recommended for the input capacitor. 4. Feedback Network The following figure shows the feedback network between V amplifier, the feedback network can provide proper frequency response for the UTC LADLD30. V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Preliminary ...

Page 8

... LADLD30 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 ...

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