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LADLD30 Datasheet(PDF) 2 Page - Unisonic Technologies

Part # LADLD30
Description  0.8V REFERENCE ULTRA LOW DROPOUT LINEAR REGULATOR
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Manufacturer  UTC [Unisonic Technologies]
Direct Link  http://www.utc-ic.com
Logo UTC - Unisonic Technologies

LADLD30 Datasheet(HTML) 2 Page - Unisonic Technologies

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LADLD30
Preliminary
CMOS IC
UNISONICTECHNOLOGIESCO.,LTD
2 of 8
www.unisonic.com.tw
QW-R502-330.c
MARKING INFORMATION
UTC
Date Code
LADLD30
L: Lead Free
G: Halogen Free
Lot Code
PIN CONFIGURATION
1
2
3
45
6
7
8
VIN
GND
FB
VOUT
VOUT
VIN
VCNTL
POK
EN
PIN DESCRIPTION
PIN NO.
PIN NAME
DESCRIPTION
1
GND
Ground pin.
2
FB
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 VOUT and FB is R1(connected with a bypass capacitor which can improve
the load transient response),and between FB and ground is R2.The value of R2 and
R1 are recommended between 100Ω~10kΩ.So the output voltage is equals:
VOUT=0.8·(1+
R2
R1
)(V)
3
4
VOUT
The output voltage pin of the regulator. There should be set an output capacitor to
compensate for closed-loop and also to improve transient responses. It’s necessary
to connect Pin 3 and Pin 4 together by wide tracks.
5
VIN
This pin is the main supply input.
It’s necessary to connect the Exposed Pad and VIN together for lower dropout
voltage. Monitoring this pin’s voltage can reset Power-On.
6
VCNTL
Power input pin of the control circuitry. Connecting this pin to a +5V (recommended)
supply voltage provides the bias for the control circuitry. The voltage at this pin is
monitored for Power-On Reset purpose.
7
POK
Output pin for Power-OK signal output.
Being an open drain output, through senescing FB voltage, this pin can show the
users the output voltage’s states. That’s this pin will be low under any of these tow
situations: the rising FB voltage is not above the VPOK threshold; the falling FB
voltage is below the VPNOK threshold. That indicates the output voltage is not ready
for users.
8
EN
Input Enable control pin. The output voltage can be shut down when this pin is
below 0.3V. This pin’s voltage can be set higher than VCNTL voltage by an internal
10μA current source, and then the regulator will begin working normally.


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