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LD39100PU12R Datasheet(PDF) 1 Page - STMicroelectronics

Part # LD39100PU12R
Description  1 A, low quiescent current, low noise voltage regulator
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LD39100PU12R Datasheet(HTML) 1 Page - STMicroelectronics

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October 2011
Doc ID 15676 Rev 3
1/23
23
LD39100XX
LD39100XX12, LD39100XX25
1 A, low quiescent current, low noise voltage regulator
Features
Input voltage from 1.5 to 5.5 V
Ultra low dropout voltage (200 mV typ. at 1 A
load)
Very low quiescent current (20 µA typ. at no
load, 200 µA typ. at 1 A load, 1 µA max in off
mode)
Very low noise with no bypass capacitor
(30 µVRMS at VOUT = 0.8 V)
Output voltage tolerance: ± 2.0 % @ 25 °C
1 A guaranteed output current
Wide range of output voltages available on
request: 0.8 V to 4.5 V with 100 mV step and
adjustable from 0.8 V
Logic-controlled electronic shutdown
Stabilized with ceramic capacitors COUT = 1 µF
Internal current and thermal limit
DFN6 (3 x 3 mm) package
Temperature range: - 40 °C to 125 °C
Applications
Printers
Personal digital assistants (PDAs)
Cordless phones
Consumer applications
Description
The LD39100xx provides 1 A maximum current
from an input voltage ranging from 1.5 V to 5.5 V
with a typical dropout voltage of 200 mV. The
device is stable due to the use of ceramic
capacitors on the input and output. The ultra low
drop-voltage, low quiescent current and low noise
features make it suitable for low power battery
powered applications. Power supply rejection is
65 dB at low frequencies and starts to roll off at 10
kHz. An enable logic control function puts the
LD39100xx in shutdown mode, allowing a total
current consumption lower than 1 µA. The device
also includes short-circuit constant current limiting
and thermal protection.
DFN6 (3 x 3 mm)
Table 1.
Device summary
Part numbers
Order codes
Output voltages
LD39100XX
LD39100PUR
Adj. from 0.8 V
LD39100XX12
LD39100PU12R
1.2 V
LD39100XX25
LD39100PU25R
2.5 V
www.st.com


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