April 2008 Rev 2 1/16
16
LD39015XX08 - LD39015XX10
LD39015XX12 - LD39015XX33
150 mA low quiescent current
low noise voltage regulator
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 µVRMS at VOUT = 0.8 V)
■Output voltage tolerance: ± 2.0% @ 25 °C
■150 mA guaranteed output current
■Wide range of output voltages available on
request: 0.8 V to 3.3 V with 100 mV step
■Logic-controlled electronic shutdown
■Compatible with ceramic capacitors
COUT = 1 µF
■Internal current and thermal limit
■Available in SOT666 and SOT23-5L packages
■Temperature range: -40 °C to 125 °C
Description
The LD39015XX series provides 150 mA
maximum current from an input voltage ranging
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.
SOT666 SOT23-5L
Table 1. Device summary
Order codes
Output voltage
SOT666 SOT23-5L
LD39015XG08R LD39015M08R (1) 0.8 V
LD39015XG10R (1) LD39015M10R 1.0 V
LD39015XG12R (1) LD39015M12R 1.2 V
LD39015XG15R (1) LD39015M15R (1) 1.5 V
LD39015XG18R (1) LD39015M18R (1) 1.8 V
LD39015XG25R (1) LD39015M25R (1) 2.5 V
LD39015XG33R LD39015M33R (1) 3.3 V
1. Available on request. Other voltages available on request from 0.8 V to 3.3 V in 100 mV step.
www.st.com
Contents LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
2/16
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
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33 Diagram
3/16
1 Diagram
Figure 1. Block diagram
Trimming
1.22 V
BandGap
Enable
EN
GND
OUT
IN
Protection
Thermal R2
R1
Trimming
1.22 V
BandGap
Enable
EN
GND
OUT
IN
Protection
Thermal R2
R1
Pin configuration LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
4/16
2 Pin configuration
Figure 2. Pin connection (top view)
SOT23-5L
SOT666
Table 2. Pin description
Pin n°
Symbol Function
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
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33 Typical application
5/16
3 Typical application
Figure 3. Typical application circuit
1 µF
IN
EN
VEN
VIN OUT
Load
GND
1 µF
VOUT
1 µF
IN
EN
VEN
VIN OUT
Load
GND
1 µF
VOUT
Maximum ratings LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
6/16
4 Maximum ratings
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 3. Absolute maximum ratings
Symbol Parameter Value Unit
VIN DC input voltage -0.3 to 7 V
VOUT DC output voltage -0.3 to VI + 0.3 V
VEN Enable input voltage -0.3 to VI + 0.3 V
IOUT Output current Internally limited mA
PDPower dissipation Internally limited mW
TSTG Storage temperature range -65 to 150 °C
TOP Operating junction temperature range -40 to 125 °C
Table 4. Thermal data
Symbol Parameter SOT23-5L SOT666 Unit
RthJA Thermal resistance junction-ambient 255 132 °C/W
RthJC Thermal resistance junction-case 81 56 °C/W
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33 Electrical characteristics
7/16
5 Electrical characteristics
Table 5. Electrical characteristics (TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 µF, IOUT = 1
mA, VEN = VIN, unless otherwise specified) (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VIN Operating input voltage 1.5 5.5 V
VUVLO
Turn-on threshold 1.45 1.48 V
Turn-off threshold 1.30 1.35 mV
VOUT VOUT accuracy
VOUT > 1.5V, IOUT = 1mA, TJ = 25°C -2.0 2.0
%
VOUT > 1.5V, IOUT = 1mA,
-40°C < TJ < 125°C -3.0 3.0
VOUT ≤ 1.5V, IOUT = 1mA ±10
mV
VOUT ≤ 1.5V, IOUT = 1mA,
-40°C < TJ < 125°C ±30
ΔVOUT Static line regulation VOUT +1V ≤ VIN ≤ 5.5V, IOUT = 1mA 0.01 %/V
ΔVOUT Transient line regulation (2) ΔVIN = +500mV, IOUT = 1mA,
TR = TF = 5µs 10 mVpp
ΔVOUT Static load regulation IOUT = 1mA to 150mA 0.002 %/mA
ΔVOUT Transient load regulation (2) IOUT = 1mA to 150mA, TR = TF = 5µs 40 mVpp
VDROP Dropout voltage (3) IOUT = 100mA, VOUT > 1.5V
-40°C < TJ < 125°C 80 100 mV
eNOutput noise voltage 1.1kHz to 100kHz, IOUT = 10mA,
VOUT = 0.8V 29 µVRMS
SVR Supply voltage rejection
VOUT = 1.5V
VIN = VOUTNOM + 0.5V +/-VRIPPLE
VRIPPLE = 0.1V, Freq. = 1kHz
IOUT = 10mA
65
dB
VIN = VOUTNOM + 0.5V +/-VRIPPLE
VRIPPLE = 0.1V, Freq.=10kHz
IOUT = 10mA
62
IQQuiescent current
IOUT = 0mA 18
µA
IOUT = 0mA, -40°C < TJ < 125°C 50
IOUT = 0 to 150mA 38
IOUT = 0 to 150mA
-40°C < TJ< 125°C 70
VIN input current in OFF MODE:
VEN = GND 0.001 1
ISC Short circuit current RL = 0 350 mA
VEN
Enable input logic low VIN = 1.5V to 5.5V,
-40°C < TJ < 125°C 0.4 V
Enable input logic high VIN = 1.5V to 5.5V,
-40°C < TJ < 125°C 0.9 V
IEN Enable pin input current VEN = VIN 0.1 100 nA
Electrical characteristics LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
8/16
TON Turn on time (4) 30 µs
TSHDN
Thermal shutdown 160 °C
Hysteresis 20
COUT Output capacitor
Capacitance (see typical
performance characteristics for
stability)
122µF
1. For VOUT(NOM) < 1.2 V, VIN = 1.5 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
specification does not apply for output voltages below 1.5 V
4. Turn-on time is the time measured between the enable input just exceeding VEN High Value and the output voltage just
reaching 95 % of its nominal value
Table 5. Electrical characteristics (continued) (TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1
µF, IOUT = 1 mA, VEN = VIN, unless otherwise specified) (1)
Symbol Parameter Test conditions Min. Typ. Max. Unit
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33Typical performance characteristics
9/16
6 Typical performance characteristics
Figure 4. Output voltage vs temperature Figure 5. Output voltage vs input voltage
Figure 6. Dropout voltage vs output current Figure 7. COUT stability region
Figure 8. Supply voltage rejection vs
frequency
Figure 9. Output noise voltage vs frequency
V
IN
=1.5V
0.75
0.76
0.77
0.78
0.79
0.8
0.81
0.82
0.83
0.84
0.85
-50 0 50 100 150
Temp [°C]
V
OUT
[V]
I
OUT
=1mA
I
OUT
=100mA
V
IN
=1.5V
0.75
0.76
0.77
0.78
0.79
0.8
0.81
0.82
0.83
0.84
0.85
-50 0 50 100 150
Temp [°C]
V
OUT
[V]
I
OUT
=1mA
I
OUT
=100mA
V
IN
=1.5V
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0123456
V
IN
[V]
V
OUT
[V]
V
IN
=1.5V
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
0123456
V
IN
[V]
V
OUT
[V]
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0 0.05 0.1 0.15 0.2 0.25
I
OUT
[A]
Vdropout [V]
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0 0.05 0.1 0.15 0.2 0.25
I
OUT
[A]
Vdropout [V]
STABILITY REGION
C
IN
=1 µF, V
IN
=V
EN
=1.5 to 5.5 V I
OUT
=1 mA to 0.15 A
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
0 5 10 15 20 25
C
OUT
[µF] (nominal value)
ESR @ 100 KHz [Ohm]
STABILITY REGION
C
IN
=1 µF, V
IN
=V
EN
=1.5 to 5.5 V I
OUT
=1 mA to 0.15 A
0
0.3
0.6
0.9
1.2
1.5
1.8
2.1
2.4
0 5 10 15 20 25
C
OUT
[µF] (nominal value)
ESR @ 100 KHz [Ohm]
I
OUT
= 10mA Vripple = 0.1Vpp
10
15
20
25
30
35
40
45
50
55
60
65
70
75
100 1000 10000 100000
Freq [Hz]
SVR [dB]
I
OUT
= 10mA Vripple = 0.1Vpp
10
15
20
25
30
35
40
45
50
55
60
65
70
75
100 1000 10000 100000
Freq [Hz]
SVR [dB]
I
OUT
=10 mA, V
IN
=4.3 V, C
IN
=C
OUT
= 1µF
V
OUT
=3.3 V
0
100
200
300
400
500
600
700
800
1000 10000 100000
FREQ [Hz]
nV/
√
Hz
I
OUT
=10 mA, V
IN
=4.3 V, C
IN
=C
OUT
= 1µF
V
OUT
=3.3 V
0
100
200
300
400
500
600
700
800
1000 10000 100000
FREQ [Hz]
nV/
√
Hz
Typical performance characteristicsLD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
10/16
Figure 10. Quiescent current vs input voltage Figure 11. Load transient
VEN = VIN = 1.5V, IOUT = 1mA to 0.15A, CIN = COUT = 1µF,
tr = tf = 5µs
Figure 12. Line transient Figure 13. Enable transient
VIN = VEN = 1.5 to 5.5V, IOUT = 1mA, COUT = 1µF,
tr = tf = 5µs
VIN = 1.5V, VEN = 0 to 1V, IOUT = 1mA, CIN = COUT = 1µF
0
20
40
60
80
100
1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 5.4 5.9
V
IN
[V]
Iq [µA]
VIN=VINH, CIN=COUT=1µF, IOUT=0.15A
0
20
40
60
80
100
1.4 1.9 2.4 2.9 3.4 3.9 4.4 4.9 5.4 5.9
V
IN
[V]
Iq [µA]
VIN=VINH, CIN=COUT=1µF, IOUT=0.15A
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33 Package mechanical data
11/16
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK®
packages. These packages have a lead-free second level interconnect. The category of
second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark.
ECOPACK specifications are available at: www.st.com.
Package mechanical data LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
12/16
Dim.
mm. mils.
Min. Typ. Max. Min. Typ. Max.
A0.90 1.45 35.4 57.1
A1 0.00 0.10 0.0 3.9
A2 0.90 1.3035.4 51.2
b0.35 0.50 13.7 19.7
C0.090.20 3.5 7.8
D2.803.00 110.2 118.1
E 1.50 1.75 59.0 68.8
e0.9537.4
H 2.60 3.00 102.3118.1
L 0.10 0.60 3.923.6
SOT23-5L mechanical data
7049676D
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33 Package mechanical data
13/16
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A0.530.57 0.60 0.021 0.022 0.024
A30.130.17 0.180.005 0.006 0.007
D 1.50 1.66 1.70 0.0590.065 0.067
E 1.50 1.65 1.70 0.0590.065 0.067
E1 1.10 1.20 1.30 0.0430.047 0.051
L1 0.11 0.190.26 0.004 0.007 0.010
L2 0.10 0.230.30 0.004 0.0090.012
L30.05 0.10 0.002 0.004
b0.17 0.25 0.17 0.25
b1 0.27 0.34 0.27 0.34
e0.50 0.5
e1 0.20 0.2
θ8° 10° 12° 8° 10° 12°
SOT666 mechanical data
7673701C
Package mechanical data LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
14/16
Dim.
mm. inch.
Min. Typ. Max. Min. Typ. Max.
A180 7.086
C 12.813.0 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 0.1230.127 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 3.94.0 4.1 0.1530.157 0.161
P3.94.0 4.1 0.1530.157 0.161
Tape & reel SOT23-xL mechanical data
LD39015XX08 - LD39015XX10 - LD39015XX12 - LD39015XX33
16/16
Please Read Carefully:
Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the
right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any
time, without notice.
All ST products are sold pursuant to ST’s terms and conditions of sale.
Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no
liability whatsoever relating to the choice, selection or use of the ST products and services described herein.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. If any part of this
document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products
or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such
third party products or services or any intellectual property contained therein.
UNLESS OTHERWISE SET FORTH IN ST’S TERMS AND CONDITIONS OF SALE ST DISCLAIMS ANY EXPRESS OR IMPLIED
WARRANTY WITH RESPECT TO THE USE AND/OR SALE OF ST PRODUCTS INCLUDING WITHOUT LIMITATION IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS
OF ANY JURISDICTION), OR INFRINGEMENT OF ANY PATENT, COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT.
UNLESS EXPRESSLY APPROVED IN WRITING BY AN AUTHORIZED ST REPRESENTATIVE, ST PRODUCTS ARE NOT
RECOMMENDED, AUTHORIZED OR WARRANTED FOR USE IN MILITARY, AIR CRAFT, SPACE, LIFE SAVING, OR LIFE SUSTAINING
APPLICATIONS, NOR IN PRODUCTS OR SYSTEMS WHERE FAILURE OR MALFUNCTION MAY RESULT IN PERSONAL INJURY,
DEATH, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE. ST PRODUCTS WHICH ARE NOT SPECIFIED AS "AUTOMOTIVE
GRADE" MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER’S OWN RISK.
Resale of ST products with provisions different from the statements and/or technical features set forth in this document shall immediately void
any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever, any
liability of ST.
ST and the ST logo are trademarks or registered trademarks of ST in various countries.
Information in this document supersedes and replaces all information previously supplied.
The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners.
© 2008 STMicroelectronics - All rights reserved
STMicroelectronics group of companies
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
