Features
■ Input voltage from 1.5 to 5.5 V
■ Ultra low dropout voltage (80 mV typ. at 100
mA load)
■ Very low quiescent current (18 µA typ. at no
load, 35 µA typ. at 150 mA load, 1 µA max in off
mode)
■ Very low noise without bypass capacitor
(29 µV
■ Output voltage tolerance: ± 2.0% @ 25 °C
■ 150 mA guaranteed output current
■ Wide range of output voltages available on
RMS
at V
OUT
= 0.8 V)
request: 0.8 V to 3.3 V with 100 mV step
■ Logic-controlled electronic shutdown
■ Compatible with ceramic capacitors C
■ Internal current and thermal limit
■ Available in SOT666 and SOT23-5L packages
■ Temperature range: -40 °C to 125 °C
= 1 µF
O
Description
The LD39015xx series provides 150 mA
maximum current from an input voltage ranging
Table 1. Device summary
LD39015xx
150 mA low quiescent current
low noise voltage regulator
SOT666
from 1.5 V to 5.5 V with a typical dropout voltage
of 80 mV. It is stable with ceramic capacitor. 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. Enable logic control function
puts the LD39015xx in shut-down mode allowing
a total current consumption lower than 1 µA. The
device also includes short-circuit constant current
limiting and thermal protection. Typical
applications are mobile phones, personal digital
assistants (PDAs), cordless phones or similar
battery-powered systems.
SOT23-5L
Order codes
Part numbers
SOT666 SOT23-5L
LD39015XX08 LD39015XG08R LD39015M08R 0.8 V
LD39015XX10 LD39015XG10R
LD39015XX12 LD39015XG12R LD39015M12R 1.2 V
LD39015XX125 LD39015M125R 1.25 V
LD39015XX15 LD39015XG15R
LD39015XX18 LD39015XG18R
LD39015XX25 LD39015XG25R
LD39015XX33 LD39015XG33R LD39015M33R 3.3 V
1. Available on request. Other voltages available on request from 0.8 V to 3.3 V in 100 mV step.
February 2009 Rev 3 1/16
(1)
(1)
(1)
(1)
LD39015M10R 1.0 V
LD39015M15R 1.5 V
LD39015M18R 1.8 V
LD39015M25R 2.5 V
Output voltages
www.st.com
16
Contents LD39015xx
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16
LD39015xx Diagram
1 Diagram
Figure 1. Block diagram
OUT
IN
IN
BandGap
BandGap
1.22 V
1.22 V
Trimming
Trimming
Thermal
Thermal
Protection
Protection
OUT
R1
R1
R2
R2
EN
EN
Enable
Enable
GND
GND
3/16
Pin configuration LD39015xx
2 Pin configuration
Figure 2. Pin connection (top view)
SOT666
Table 2. Pin description
Pin n°
SOT666 SOT23-5L
1 3 EN Enable pin logic input: Low=shutdown, High=active
2 2 GND Common ground.
3 1 IN Input voltage of the LDO
4 5 OUT Output voltage
5 4 NC Not connected
6 NC Not connected
SOT23-5L
Symbol Function
4/16
LD39015xx Typical application
3 Typical application
Figure 3. Typical application circuit
V
V
V
IN
IN
IN
IN
OUT
OUT
V
OUT
OUT
1 µF
1 µF
V
V
EN
EN
EN
EN
GND
GND
1 µF
1 µF
Load
Load
5/16
Maximum ratings LD39015xx
4 Maximum ratings
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
V
I
T
T
V
IN
OUT
EN
OUT
P
D
STG
OP
DC input voltage -0.3 to 7 V
DC output voltage - 0.3 to VI + 0.3 V
Enable input voltage - 0.3 to VI + 0.3 V
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
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these conditions is not implied. All values are referred to GND.
Table 4. Thermal data
Symbol Parameter SOT23-5L SOT666 Unit
R
thJA
R
thJC
Thermal resistance junction-ambient 255 132 °C/W
Thermal resistance junction-case 81 56 °C/W
6/16
LD39015xx Electrical characteristics
5 Electrical characteristics
TJ = 25 °C, V
IN
= V
OUT(NOM)
+ 1 V, CIN = C
OUT
= 1 µF, I
= 1 mA, VEN = VIN, unless
OUT
otherwise specified.
Table 5. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
Operating input voltage 1.5 5.5 V
IN
Turn-on threshold 1.45 1.48 V
V
UVLO
Turn-off threshold 1.30 1.35 mV
V
OUTVOUT
ΔV
OUT
ΔV
OUT
ΔV
OUT
ΔV
OUT
V
DROP
e
N
SVR
I
Q
I
SC
accuracy
Static line regulation V
Transient line regulation
(2)
Static load regulation I
Transient load regulation
Dropout voltage
(3)
(2)
Output noise voltage
Supply voltage rejection
V
= 1.5V
OUT
Quiescent current
Short circuit current RL = 0 350 mA
Enable input logic low
V
EN
Enable input logic high
(1)
> 1.5V, I
V
OUT
V
> 1.5V, I
OUT
-40°C < T
V
OUT
V
OUT
-40°C < T
OUT
ΔV
T
R
OUT
I
OUT
I
OUT
J
≤ 1.5V, I
≤ 1.5V, I
J
+1V ≤ VIN ≤ 5.5V, I
= +500mV, I
IN
= TF = 5µs
= 1mA to 150mA 0.002 %/mA
= 1mA to 150mA, TR = TF = 5µs 40 mVpp
= 100mA, V
-40°C < TJ < 125°C
1.1kHz to 100kHz, I
= 0.8V
V
OUT
VIN = V
OUTNOM
V
I
V
V
I
I
I
I
I
-40°C < T
V
V
V
-40°C < T
V
= 0.1V, Freq. = 1kHz
RIPPLE
= 10mA
OUT
= V
IN
OUTNOM
= 0.1V, Freq.=10kHz
RIPPLE
= 10mA
OUT
= 0mA 18
OUT
= 0mA, -40°C < TJ < 125°C 50
OUT
= 0 to 150mA 38
OUT
= 0 to 150mA
OUT
IN
EN
IN
IN
< 125°C
J
input current in OFF MODE:
= GND
= 1.5V to 5.5V,
J
= 1.5V to 5.5V,
-40°C < TJ < 125°C
= 1mA, TJ = 25°C -2.0 2.0
OUT
= 1mA,
OUT
< 125°C
= 1mA ±10
OUT
= 1mA,
OUT
-3.0 3.0
< 125°C
= 1mA 0.01 %/V
OUT
= 1mA,
OUT
> 1.5V
OUT
= 10mA,
OUT
+ 0.5V +/-V
+ 0.5V +/-V
RIPPLE
RIPPLE
< 125°C
0.9 V
±30
10 mVpp
80 100 mV
29 µV
65
62
70
0.001 1
0.4 V
mV
dB
µA
%
RMS
7/16
Electrical characteristics LD39015xx
Table 5. Electrical characteristics (continued)
(1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
I
Enable pin input current V
EN
ON
Turn on time
T
(4)
EN
= V
IN
0.1 100 nA
30 µs
Thermal shutdown 160
T
SHDN
Hysteresis 20
°C
Capacitance (see typical
C
Output capacitor
OUT
performance characteristics for
122µF
stability)
1. For V
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
4. Turn-on time is the time measured between the enable input just exceeding V
OUT(NOM)
specification does not apply for output voltages below 1.5 V
reaching 95 % of its nominal value
< 1.2 V, V
= 1.5 V
IN
High Value and the output voltage just
EN
8/16
LD39015xx Typical performance characteristics
6 Typical performance characteristics
Figure 4. Output voltage vs. temperature Figure 5. Output voltage vs. input voltage
0.85
0.85
0.84
0.84
0.83
0.83
0.82
0.82
0.81
0.81
[V]
[V]
0.8
0.8
OUT
OUT
0.79
0.79
V
V
0.78
0.78
0.77
0.77
0.76
0.76
0.75
0.75
-50 0 50 100 150
-50 0 50 100 150
Temp [°C]
Temp [°C]
VIN=1.5V
VIN=1.5V
I
I
I
I
OUT
OUT
OUT
OUT
=1mA
=1mA
=100mA
=100mA
0.9
0.9
0.8
0.8
0.7
0.7
0.6
0.6
0.5
0.5
[V]
[V]
0.4
0.4
OUT
OUT
V
V
0.3
0.3
0.2
0.2
0.1
0.1
0
0
0123456
0123456
[V]
[V]
V
V
IN
IN
VIN=1.5V
VIN=1.5V
Figure 6. Dropout voltage vs. output current Figure 7. C
2.4
2.4
CIN=1 µF, VIN=VEN=1.5 to 5.5 V I
0.16
0.16
0.14
0.14
0.12
0.12
0.1
0.1
0.08
0.08
0.06
0.06
0.04
0.04
Vdropout [V]
Vdropout [V]
0.02
0.02
0
0
0 0.05 0.1 0.15 0.2 0.25
0 0.05 0.1 0.15 0.2 0.25
[A]
[A]
I
I
OUT
OUT
Figure 8. Supply voltage rejection vs.
75
75
70
70
65
65
60
60
55
55
50
50
45
45
40
40
35
35
SVR [dB]
SVR [dB]
30
30
25
25
20
20
15
15
10
10
100 1000 10000 100000
100 1000 10000 100000
frequency
I
I
= 10mA Vripple = 0.1Vpp
= 10mA Vripple = 0.1Vpp
OUT
OUT
Freq [Hz]
Freq [Hz]
ESR @ 100 KHz [Ohm]
ESR @ 100 KHz [Ohm]
Figure 9. Output noise voltage vs. frequency
800
800
700
700
600
600
500
500
400
400
Hz
Hz
√
√
300
300
nV/
nV/
200
200
100
100
CIN=1 µF, VIN=VEN=1.5 to 5.5 V I
2.1
2.1
1.8
1.8
1.5
1.5
1.2
1.2
0.9
0.9
0.6
0.6
0.3
0.3
0
0
0 5 10 15 20 25
0 5 10 15 20 25
0
0
1000 10000 100000
1000 10000 100000
stability region
OUT
STABILITY REGION
STABILITY REGION
C
C
[µF] (nominal value)
[µF] (nominal value)
OUT
OUT
I
=10 mA, VIN=4.3 V, CIN=C
I
=10 mA, VIN=4.3 V, CIN=C
OUT
OUT
FREQ [Hz]
FREQ [Hz]
=1 mA to 0.15 A
=1 mA to 0.15 A
OUT
OUT
V
=3.3 V
V
=3.3 V
OUT
OUT
OUT
OUT
= 1µF
= 1µF
9/16
Typical performance characteristics LD39015xx
Figure 10. Quiescent current vs. input voltage Figure 11. Load transient
100
100
80
80
60
60
40
40
Iq [µA]
Iq [µA]
20
20
0
0
1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 5.4 5.9
1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 5.4 5.9
VIN=V
VIN=V
V
V
INH
INH
IN
IN
[V]
[V]
, CIN=C
, CIN=C
OUT
OUT
=1µF, I
=1µF, I
OUT
OUT
=0.15A
=0.15A
VEN = V
Figure 12. Line transient Figure 13. Enable transient
VIN = VEN = 1.5 to 5.5V, I
= tf = 5µs
t
r
= 1mA, C
OUT
OUT
= 1µF,
V
IN
= 1.5V, I
IN
tr = tf = 5µs
= 1.5V, V
OUT
= 0 to 1V, I
EN
= 1mA to 0.15A, CIN = C
= 1mA, CIN = C
OUT
OUT
OUT
= 1µF,
= 1µF
10/16
LD39015xx Package mechanical data
7 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: www.st.com. ECOPACK
is an ST trademark.
®
packages, depending on their level of environmental compliance. ECOPACK®
11/16
Package mechanical data LD39015xx
SOT23-5L mechanical data
mm. mils.
Dim.
Min. Typ. Max. Min. Typ. Max.
A0.90 1.45 35.4 57.1
A1 0.00 0.10 0.0 3.9
A2 0.901.30 35.4 51.2
b 0.35 0.50 13.7 19.7
C0.09 0.20 3.5 7.8
D2.80 3.00 110.2 118.1
E 1.50 1.75 59.0 68.8
e0.95 37.4
H 2.60 3.00 102.3 118.1
L 0.10 0.60 3.9 23.6
12/16
7049676D
LD39015xx Package mechanical data
SOT666 mechanical data
mm. inch.
Dim.
Min. Typ. Max. Min. Typ. Max.
A0.53 0.57 0.60 0.021 0.022 0.024
A3 0.13 0.17 0.18 0.005 0.006 0.007
D 1.50 1.66 1.70 0.059 0.065 0.067
E 1.50 1.65 1.70 0.059 0.065 0.067
E1 1.10 1.20 1.30 0.043 0.047 0.051
L1 0.11 0.19 0.26 0.004 0.007 0.010
L2 0.10 0.23 0.30 0.004 0.009 0.012
L3 0.05 0.10 0.002 0.004
b 0.17 0.25 0.17 0.25
b1 0.27 0.34 0.27 0.34
e0.50 0.5
e1 0.20 0.2
θ
8° 10° 12° 8° 10° 12°
7673701C
13/16
Package mechanical data LD39015xx
Tape & reel SOT23-xL mechanical data
Dim.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.8 13.0 13.2 0.504 0.512 0.519
D 20.2 0.795
N60 2.362
T 14.4 0.567
Ao 3.133.233.33 0.123 0.127 0.131
Bo 3.07 3.17 3.27 0.120 0.124 0.128
Ko 1.27 1.37 1.47 0.050 0.054 0.0.58
Po 3.9 4.0 4.1 0.153 0.157 0.161
P 3.9 4.0 4.1 0.153 0.157 0.161
mm. inch.
14/16
LD39015xx Revision history
8 Revision history
Table 6. Document revision history
Date Revision Changes
13-Nov-2007 1 Initial release.
11-Apr-2008 2 Modified: Table 5 on page 7.
12-Feb-2009 3 Modified: Table 1 on page 1.
15/16
LD39015xx
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