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LDLN015PU10R
Datasheet (ST)
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Datasheet LDLN015PU10R, LDLN015PU12R, LDLN015PU15R, LDLN015PU18R, LDLN015PU28R Datasheet (ST)

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Features
LDLN015xx
150 mA - ultra low noise - high PSRR
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
LDLN015xx Electrical characteristics
Table 5. Electrical characteristics
(1) (2)
(continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
Thermal shutdown 166
T
SHDN
C
OUT
1. For V
Hysteresis 10
Output capacitor Capacitance (see
OUT(NOM)
< 1.0 V V
IN
= 2 V.
Figure 15
)0.33 4.7µF
2. All transient values are guaranteed by design, not production tested.
3. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This specification does not apply for output voltages below 2 V.
4. Turn-on time is time measured between the enable input just exceeding V reaching 95% of its nominal value.
high value and the output voltage just
EN
°C
Doc ID 022735 Rev 1 7/17
Typical performance characteristics LDLN015xx

5 Typical performance characteristics

Figure 4. Output voltage vs. temperature Figure 5. Output voltage vs. input voltage
1.00%
1.00%
0.80%
0.80%
0.60%
0.60%
0.40%
0.40%
0.20%
0.20%
0.00%
0.00%
variation [%]
variation [%]
-0.20%
-0.20%
OUT
OUT
V
V
-0.40%
-0.40%
-0.60%
-0.60%
-0.80%
-0.80%
-1.00%
-1.00%
-40 -20 0 20 40 60 80 100 120 140
-40 -20 0 20 40 60 80 100 120 140
Figure 6. Output voltage vs. input voltage Figure 7. Dropout voltage vs. temperature
3.6
3.6
3.2
3.2
2.8
2.8
2.4
2.4
[V]
[V]
2.0
2.0
OUT
OUT
1.6
1.6
V
V
1.2
1.2
0.8
0.8
0.4
0.4
0.0
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
V
= 5.5 V; I
V
= 5.5 V; I
IN
IN
Temperature [°C]
Temperature [°C]
V
V
OUT
OUT
V
V
= 150 mA
= 150 mA
OUT
OUT
= 3.3 V; I
= 3.3 V; I
[V]
[V]
IN
IN
T = -40 °C
T = -40 °C
T = +25 °C
T = +25 °C
T = 125 °C
T = 125 °C
= 150 mA
= 150 mA
OUT
OUT
1.4
1.4
1.2
1.2
1.0
1.0
0.8
0.8
[V]
[V]
OUT
OUT
0.6
0.6
V
V
0.4
0.4
0.2
0.2
0.0
0.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
130
130
120
120
110
110
100
100
90
90
Vdrop [mV]
Vdrop [mV]
80
80
70
70
60
60
50
50
-40 -20 0 20 40 60 80 100 120 140
-40 -20 0 20 40 60 80 100 120 140
V
= 1 V; I
V
= 1 V; I
OUT
OUT
V
V
I
= 150 mA
I
= 150 mA
OUT
OUT
Temperature [°C]
Temperature [°C]
= 150 mA
= 150 mA
OUT
OUT
T = -40 °C
T = -40 °C
T = +25 °C
T = +25 °C
T = 125 °C
T = 125 °C
[V]
[V]
IN
IN
Figure 8. Dropout voltage vs. I
110
110
100
100
90
90
80
80
70
70
60
60
50
50
Vdrop [mV]
Vdrop [mV]
40
40
30
30
20
20
10
10
-40 °C
-40 °C
25 °C
25 °C
125 °C
125 °C
0 20 40 60 80 100 120 140 160
0 20 40 60 80 100 120 140 160
I
I
OUT
OUT
[mA]
[mA]
OUT
8/17 Doc ID 022735 Rev 1

Figure 9. Quiescent current vs. temperature

130
130
120
120
110
110
100
100
90
90
Iq [µA]
Iq [µA]
80
80
70
70
60
60
50
50
V
= 4.3 V; I
V
= 4.3 V; I
IN
IN
-40 -20 0 20 40 60 80 100 120 140
-40 -20 0 20 40 60 80 100 120 140
= 0 mA
= 0 mA
OUT
OUT
Temperature [°C]
Temperature [°C]
LDLN015xx Typical performance characteristics
Figure 10. Quiescent current vs. I
110
110
100
100
90
90
80
80
70
70
60
60
Iq [µA]
Iq [µA]
50
50
40
40
30
30
20
20
10
10
0 20 40 60 80 100 120 140 160
0 20 40 60 80 100 120 140 160
-40°C
-40°C
25°C
25°C
125°C
125°C
V
V
IN
IN
I
[mA]
I
[mA]
OUT
OUT
= 4.3 V
= 4.3 V
OUT
Figure 12. Supply voltage rejection vs.
100
100
90
90
80
80
70
70
60
60
50
50
Supply Voltage rejection [dB]
Supply Voltage rejection [dB]
40
40
30
30
100 1000 10000 100000
100 1000 10000 100000
frequency
V
= 2.5 ± 0.5 V; I
V
= 2.5 ± 0.5 V; I
IN
IN
= 10 mA; VO= 1 V
= 10 mA; VO= 1 V
OUT
OUT
f [Hz]
f [Hz]
Figure 11. Quiescent current vs. V
100
100
90
90
80
80
70
70
60
60
50
50
Iq [µA]
Iq [µA]
40
40
30
30
20
20
10
10
0
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
VIN[V]
VIN[V]
I
I
OUT
OUT
IN
T = -40°C
T = -40°C
T = +25°C
T = +25°C
T = 125 °C
T = 125 °C
= 150 mA
= 150 mA
Figure 13. Supply voltage rejection vs. I
110
110
100
100
90
90
80
80
70
70
60
60
Supply Voltage Rejection [db]
Supply Voltage Rejection [db]
50
50
V
= 2.5 ± 0.5 V; F = 1 kHz; VO= 1 V
V
= 2.5 ± 0.5 V; F = 1 kHz; VO= 1 V
IN
IN
0 20 40 60 80 100 120 140 160
0 20 40 60 80 100 120 140 160
I
[mA]
I
[mA]
OUT
OUT
OUT

Figure 14. Noise spectral density Figure 15. Stability area

2.5
2.0
f [Hz]
Vo=1.0V
Vo=2.8V
Vo=3.3V
1.5
1.0
eN [uV/SQRT(Hz )]
0.5
0.0 10 100 1000 10000 100000
0.70
0.70
0.60
0.60
0.50
0.50
0.40
0.40
0.30
0.30
0.20
0.20
ESR at 100 kHz [Ohm]
ESR at 100 kHz [Ohm]
0.10
0.10
0.00
0.00
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0
Doc ID 022735 Rev 1 9/17
ESR MAX
ESR MAX
ESR MIN
ESR MIN
C
C
OUT
OUT
[µF]
[µF]
Typical performance characteristics LDLN015xx

Figure 16. Load transient Figure 17. Line transient at I

I
= from 10 to 150 mA; t
OUT
Figure 18. Line transient at I
= t
rise
fall
= 5 µs
= 150 mA Figure 19. Turn-on time at I
OUT
V
= from 4.3 to 4.8 V; I
IN
V
OUT
OUT
= 1 V
= 1 mA; t
OUT
rise
OUT
= 1 mA
= t
= 5 µs
fall
= 1 mA;
V
= from 4.3 to 4.8 V; I
IN
Figure 20. Turn-on time at I
V
V
= 2 V; VO = 1 V; I
IN
OUT
= 1 V
OUT
= 150 mA; t
OUT
= 150 mA
= t
rise
= 150 mA,
OUT
fall
= 5 µs
10/17 Doc ID 022735 Rev 1
V
= 2 V; VO = 1 V; I
IN
OUT
= 1 mA
Figure 21. Turn-on time at I
V
= 3.3 V
V
= 4.3 V; VO = 3.3 V; I
IN
OUT
OUT
= 1 mA
OUT
= 1 mA;
LDLN015xx Typical performance characteristics
Figure 22. Turn-on time at I
V
= 3.3 V
V
= 4.3 V; VO = 3.3 V; I
IN
OUT
OUT
= 150 mA
=150 mA,
OUT

Figure 23. Startup transient

VO = 3.3 V; I
OUT
= 150 mA
Doc ID 022735 Rev 1 11/17
Package mechanical data LDLN015xx

6 Package mechanical data

In order to meet environmental requirements, ST offers these devices in different grades of
®
ECOPACK specifications, grade definitions and product status are available at:
packages, depending on their level of environmental compliance. ECOPACK
www.st.com
. ECOPACK
is an ST trademark.

Table 6. DFN6 (2 x 2 mm) mechanical data

mm.
Dim.
Min. Typ. Max.
A 0.51 0.55 0.60
A1 0 0.02 0.05
b 0.18 0.25 0.30
D2.00
D2 1.30 1.45 1.55
E2.00
E2 0.85 1.00 1.10
e0.50
L 0.15 0.25 0.35
12/17 Doc ID 022735 Rev 1
LDLN015xx Package mechanical data

Figure 24. DFN6 (2 x 2 mm) drawing dimensions

Doc ID 022735 Rev 1 13/17
Package mechanical data LDLN015xx
Tape & reel QFNxx/DFNxx (2x2 mm) mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A180 7.087
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 2.3 0.091
Bo 2.3 0.091
Ko 1.0 0.039
Po 4 0.157
P 8 0.315
14/17 Doc ID 022735 Rev 1
LDLN015xx Package mechanical data

Figure 25. DFN6 (2 x 2) footprint recommended data (dimensions in mm.)

Doc ID 022735 Rev 1 15/17
Revision history LDLN015xx

7 Revision history

Table 7. Document revision history

Date Revision Changes
31-Jan-2012 1 Initial release.
16/17 Doc ID 022735 Rev 1
LDLN015xx
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Doc ID 022735 Rev 1 17/17
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