ST LDLN015PU10R, LDLN015PU12R, LDLN015PU15R, LDLN015PU18R, LDLN015PU28R User Manual
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Features
LDLN015xx
150 mA - ultra low noise - high PSRR
linear voltage regulator IC
Preliminary data
■ Ultra low noise: 6.3 µV
from 10 Hz to
RMS
100 kHz
■ Input voltage from 2.1 to 5.5 V
■ Very low quiescent current (17 µA typ. at no
load, 54 µA typ. at 150 mA load; 2 µA max. in
off mode)
■ Output voltage tolerance: ± 1% at 25 °C
■ 150 mA guaranteed output current
■ Wide range of output voltage from 0.8 V to
3.3 V with 100 mV step
■ Logic-controlled electronic shutdown
■ Compatible with ceramic capacitor
(C
■ No bypass capacitor is required
■ Internal current and thermal limit
■ Package DFN6 (2 x 2 mm)
■ Temperature range: - 40 °C to 125 °C
OUT
= 0.47 µF)
Description
The LDLN015xx is an ultra low noise linear
regulator which provides 150 mA maximum
current from an input voltage ranging from 2.1 V
to 5.5 V with a typical dropout voltage of 86 mV.
With its 6.3 µV
Hz to 100 kHz, the LDLN015xx provides a very
clean output suitable for ultra sensitive loads. It is
noise value in a band from 10
RMS
DFN6 (2 x 2 mm)
stable with ceramic capacitors. High PSRR, low
quiescent current and very low noise features
make it suitable for low power battery powered
applications. Power supply rejection is higher than
90 dB at low frequencies and starts to roll off at 10
kHz. The enable logic control function puts the
LDLN015xx into shutdown mode allowing a total
current consumption lower than 1 µA. The device
also includes a short-circuit constant current
limiting and thermal protection. Typical
applications are noise sensitive loads like ADC,
VCO in mobile phones, and personal digital
assistants (PDAs).
Table 1. Device summary
Part numbers Order codes Output voltages
LDLN015XX10 LDLN015PU10R 1.0 V
LDLN015XX12 LDLN015PU12R 1.2 V
January 2012 Doc ID 022735 Rev 1 1/17
This is preliminar y information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
LDLN015XX15 LDLN015PU15R 1.5 V
LDLN015XX18 LDLN015PU18R 1.8 V
LDLN015XX28 LDLN015PU28R 2.8 V
LDLN015XX33 LDLN015PU33R 3.3 V
www.st.com
17
Contents LDLN015xx
Contents
1 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17 Doc ID 022735 Rev 1
LDLN015xx Application diagram
1 Application diagram
Figure 1. Block diagram
V
IN
VBG
Bandgap
reference
OPAMP
Figure 2. Typical application circuit
RC f ilter
VREF
VFB
OPAMP
PDMO S
V
OUT
Doc ID 022735 Rev 1 3/17
Pin configuration LDLN015xx
2 Pin configuration
Figure 3. Pin connections (top view)
IN
NC
EN
1
2
3
6
5
4
CS26700
OUT
NC
GND
Table 2. Pin description
Pin n° Symbol Name and function
1 IN Input voltage
2 NC Not connected
Enable input.
3EN
Set V
Set V
4 GND Ground
5 NC Not connected
6 OUT Output voltage
> 0.9 to turn on the device
EN
< 0.4 to turn off the device
EN
Note: Exposed pad is electrically connected to GND.
4/17 Doc ID 022735 Rev 1
LDLN015xx Maximum ratings
3 Maximum ratings
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
DC input voltage -0.3 to 7 V
DC output voltage from -0.3 to 4.6 V
Enable input voltage from -0.3 to V
+ 0.3 V
IN
Output current Internally limited mA
Power dissipation Internally limited mW
Storage temperature range -65 to 150 °C
Operating junction temperature range -40 to 125 °C
Human body model ±
3kV
V
V
I
T
T
V
IN
OUT
EN
OUT
P
D
STG
OP
ESD
Machine model ± 300 V
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied.
Table 4. Thermal data
Symbol Parameter Value Unit
R
R
thJA
thJC
Thermal resistance junction-ambient 105 °C/W
Thermal resistance junction-case 20 °C/W
Doc ID 022735 Rev 1 5/17
Electrical characteristics LDLN015xx
4 Electrical characteristics
TJ = 25 °C, V
IN
otherwise specified.
Table 5. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
IN
V
OUT
ΔV
OUT
ΔV
OUT
V
DROP
e
N
SVR
I
Q
I
SC
V
EN
I
EN
T
ON
Operating input voltage 2.1 5.5 V
V
accuracy
OUT
Static line regulation V
Static load regulation I
Dropout voltage
(3)
Output noise voltage
Supply voltage
rejection V
OUT
=1.0V
Quiescent current
Short-circuit current RL=0; VIN=2.0V 300 mA
Enable input logic low VIN = 2.1V to 5.5V, -40°C<TJ <125°C 0.4
Enable input logic high V
Enable pin input
current
Tu r n - o n t i m e
(4)
= V
OUT(NOM)
I
OUT
-40°C<T
150mA, V
OUT
OUT
I
OUT
-40°C<T
10Hz to 100kHz, I
V
OUT
10Hz to 100kHz, I
V
OUT
V
IN
V
RIPPLE
I
OUT
V
IN
V
RIPPLE
I
OUT
VIN = V
V
RIPPLE
I
OUT
I
OUT
I
OUT
I
OUT
I
OUT
V
IN
V
EN
IN
V
EN
+ 1 V, C
(1) (2)
IN
= C
= 0.47 µF, I
OUT
OUT
= 1 mA, V
= VIN, unless
EN
=1mA -1 1
<125°C, I
J
IN=VOUT(NOM)
+1V ≤VIN ≤5.5V, I
=from 1mA to
OUT
+ 1V to 5.5
= 1mA 0.005 %/V
OUT
-2 2
= 1mA to 150mA 0.001 %/mA
= 150mA, V
<125°C
J
=1.0V
OUT
OUT
> 1.9V
= 0mA,
86 180 mV
6.3
µV
= 150mA,
=1.0V
= V
OUTNOM
+1V+/-V
= 0.5V Freq.=1kHz
OUT
RIPPLE
9.9
92
= 10mA
= V
OUTNOM
+1V+/-V
RIPPLE
= 0.5V Freq.=10kHz
89
dB
= 10mA
OUTNOM
+1V+/-V
RIPPLE
= 0.5V Freq.=100kHz
50
= 1mA
=0mA
=0mA, -40°C<TJ<125°C
=150mA
=150mA, -40°C<TJ<125°C
input current in OFF mode
=GND
17
54
120
0.002 2
60
µA
= 2.1V to 5.5V, -40°C<TJ <125°C 0.9
=5.5V 0.1 100 nA
110 µs
%
RMS
V
6/17 Doc ID 022735 Rev 1
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