150 mA capless ultra low drop linear regulator ICs
Features
■ No input or output capacitor required
■ Input voltage from 1.8 V to 5.5 V
■ Very low drop: 50 mV at 100 mA load
■ ± 2% output voltage accuracy
■ Output voltage tolerance: ± 3%
■ Low noise
■ 150 mA guaranteed output current
■ Available in fixed and adjustable output
voltages, from 0.8 V in 100 mV steps
■ Internal current and thermal limit
■ Operating temperature range: - 40 °C to 125 °C
■ SOT23 5-lead package
Applications
■ Space-sensitive applications
■ Battery-powered equipment
■ Cordless and mobile phones
■ Industrial and medical equipment
■ Portable equipment
LDCL015XX
LDCL015XX33
SOT23-5L
10 kHz. The Enable logic control function puts the
LDCL015 in shutdown mode, reducing the total
current consumption to less than 1 µA. The
device also includes short-circuit constant current
limit and thermal protection. Typical applications
are mobile phones, personal digital assistants
and similar battery-powered systems.
Description
The LDCL015 provides 150 mA of maximum
current from an input voltage ranging from 1.8 V
to 5.5 V, with a typical dropout voltage of 50 mV. It
is stable with no input or output capacitor. Low
quiescent current, low noise and capless
operation make it suitable for low power batterypowered applications and allows the reduction of
board size. Typical power supply rejection ratio is
52 dB at low frequencies, and starts to roll off at
Table 1. Device summary
Part numbers Markings Order codes Output voltages
LDCL015XX33 CL33 LDCL015M33R 3.3 V
LDCL015XX CLAD LDCL015MR Adjustable from 0.8
September 2011 Doc ID 022166 Rev 2 1/16
www.st.com
16
Contents LDCL015XX, LDCL015XX33
Contents
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.1 General operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.2 Thermal and short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3 Output voltage setting for ADJ version . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.4 Enable pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Block diagram
1 Block diagram
Figure 1. LDCL015 block diagram
Doc ID 022166 Rev 2 3/16
Pin configuration LDCL015XX, LDCL015XX33
2 Pin configuration
Figure 2. Pin connections (top view)
Table 2. Pin description
Pin n° Symbol Name and function
1V
IN
Input voltage
2 GND Ground
3 EN Enable pin. The device is in OFF state when this pin is pulled low
4 ADJ/NC Feedback pin for adjustable version.Not connected on fixed version
5V
OUT
Output voltage
4/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Typical application
3 Typical application
Figure 3. Typical application schematic - adjustable version (LDCL015XX)
IN
CIN
LDCL015
EN
ON
OFF
Figure 4. Typical application schematic - fixed V
GND
IN
CIN
LDCL015
EN
ON
OFF
GND
OUT
COUT
ADJ
AM09360v1
version (LDCL015XX33)
OUT
OUT
COUT
COUT
AM09361v1
R1
R2
Note: 1 R1 and R2 are calculated according to the following formula: R1 = R2 x (V
2C
and C
IN
are optional.
OUT
OUT/VADJ
-1).
Doc ID 022166 Rev 2 5/16
Maximum ratings LDCL015XX, LDCL015XX33
4 Maximum ratings
Table 3. Absolute maximum ratings
Symbol Parameter Value Unit
V
IN
V
OUT
I
OUT
EN, ADJ Enable and feedback pin voltage -0.3 to +V
P
D
Input supply voltage -0.3 to +7 V
Output voltage -0.3 to V
+0.3 V
IN
Output current Internally limited A
+0.3 V
IN
Power dissipation Internally limited W
Machine model ±300
ESD
V
Human body model ±3000
T
J-OP
T
J-MAX
T
STG
Operating junction temperature -40 to 125 °C
Maximum junction temperature 150 °C
Storage temperature -65 to 150 °C
Note: Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 4. Thermal data
Symbol Parameter Value Unit
R
R
thJC
thJA
Thermal resistance junction-case 255 °C/W
Thermal resistance junction-ambient 81 °C/W
6/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Electrical characteristics
5 Electrical characteristics
TJ = 25 °C, V
Table 5. Electrical characteristics
IN
= V
OUT
+ 0.5 V; V
OUT
= 1.6 V; C
IN
= C
= 100 nF; I
OUT
=1 mA; VEN=VIN.
OUT
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
OUT
V
REF
ΔV
OUT%
V
ΔV
OUT%
OUT
V
DROP
eN
SVR Supply voltage rejection
I
Q
Operating input voltage range 1.8 5.5 V
IN
T
=25°C -2.0 2.0 %
(1)
Output voltage accuracy
Reference voltage for
adjustable version
Reference accuracy for
adjustable version
Adj. current 0<V
/Δ
Static line regulation
IN
/ΔI
Static load regulation 1mA<I
Dropout voltage
(2)
Output noise voltage
10 Hz to 100k Hz; I
Quiescent current
= 10 mA
O
(2)
J
-40°C<T
<125°C -3.0 3.0
J
0.8 V
-40°C<TJ<125°C -3.0 3.0 %
<5.5V -1 1 µA
ADJ
+0.5V<VIN<5.5V;
V
OUT
TJ=25°C
<150mA;TJ=25°C 0.003 %/mA
OUT
V
=1.6V; I
OUT
-40°C<T
V
OUT
V
IN
V
RIPPLE-PP
<125°C
J
=1V 40 µV
= V
OUT
Freq.=1kHz; I
= V
V
IN
OUT
V
RIPPLE-PP
Freq.=10kHz; I
0<I
<150mA; -
OUT
40°C<T
<125°C
J
OUT
+1V+V
= 0.5V
OUT
+1V+V
= 0.5V
OUT
=100mA;
RIPPLE
= 10mA
RIPPLE
= 10mA
0.05 %/V
50 100 mV
52
51
120 160 µA
Shutdown Mode 1
I
SC
Short-circuit current
Enable Input logic low
V
EN
I
EN
T
ON
Enable input logic high 1.0
Enable pin input current VEN=VIN; 1.8V<VIN<5.5V 0.1 100 nA
Turn-on time
(3)
(2)
V
=0V 220 mA
OUT
1.8V<V
<5.5V, -
IN
40°C<TJ<125°C
V
=0.8V 300 µs
OUT
Thermal shutdown 170
T
SHDN
1. Minimum V
2. 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 nominal output voltages below 1.6 V.
3. Turn-on time is the time measured between the enable input just exceeding V
reaching 95% of its nominal value.
Hysteresis 150
= V
IN
OUT
+ V
or 1.8 V, whichever is greater.
DROP
high value and the output voltage just
EN
RMS
dB
0.3
V
°C
Doc ID 022166 Rev 2 7/16
Typical performance characteristics LDCL015XX, LDCL015XX33
6 Typical performance characteristics
Figure 5. Output voltage vs. temperature
(V
= 3.8 V)
= 3.8 V, I
IN
IN
= 1 mA
OUT
3.44
V
3.42
3.4
3.38
3.36
3.34
3.32
3.3
[V]
3.28
OUT
V
3.26
3.24
3.22
3.2
3.18
= 3.3 V
V
OUT
3.16
-50 -25 0 25 50 75 100 125 150
T [°C]
Figure 7. Output voltage vs. temperature
(I
= 150 mA)
V
IN
OUT
= 3.8 V, I
= 150 mA
OUT
T [°C]
= 3.3 V
V
OUT
3.44
3.42
3.4
3.38
3.36
3.34
3.32
[V]
3.3
OUT
V
3.28
3.26
3.24
3.22
3.2
3.18
3.16
-50 -25 0 25 50 75 100 125 150
Figure 6. Output voltage vs. temperature
(VIN= 2 V)
0.86
0.85
0.84
0.83
0.82
0.81
[V]
0.8
OUT
V
0.79
0.78
0.77
0.76
0.75
0.74
V
= 2 V, I
IN
OUT
= 1 mA
V
@0.8 V
OUT
-50 -25 0 25 50 75 100 125 150
T [°C]
Figure 8. Output voltage vs. temperature
(V
= 0.8 V)
OUT
0.86
V
= 2 V, I
IN
0.85
0.84
0.83
0.82
0.81
[V]
0.8
OUT
V
0.79
0.78
0.77
0.76
0.75
0.74
-50 -25 0 25 50 75 100 125 150
= 150 mA
OUT
T [°C]
V
OUT
@0.8 V
Figure 9. Output voltage vs. input voltage
(V
= 0.8 V)
0.9
0.8
0.7
0.6
[V]
0.5
0.4
OUT
V
0.3
0.2
0.1
0
0123 456
8/16 Doc ID 022166 Rev 2
OUT
VIN[V]
V
EN
I
OUT
= VIN; V
= 1 mA; C
= from 0 V to 5.5 V;
IN
= C
= 0.1 µF
IN
OUT
V
@0.8 V
OUT
Figure 10. Output voltage vs. input voltage
(V
= 3.3 V)
OUT
3.5
3
2.5
2
[V]
1.5
OUT
V
1
0.5
0
0123 456
VIN[V]
V
EN
I
OUT
= VIN; V
= 1 mA; C
= from 0 V to 5.5 V;
IN
= C
= 0.1 µF
IN
OUT
V
= 3.3 V
OUT
LDCL015XX, LDCL015XX33 Typical performance characteristics
Figure 11. Dropout voltage vs. temperature Figure 12. SVR vs. frequency (V
300
250
V
= VIN; I
EN
= 150 mA
OUT
200
150
100
Vdropout [mV]
50
V
= 3.3 V
OUT
0
-75 -50 -25 0 25 50 75 100 125 150
T [°C]
Figure 13. SVR vs. frequency Figure 14. Noise voltage vs. C
70
C
65
= 0.1 µF, no C
IN
OUT, IOUT
=10 mA
60
55
50
45
40
35
SVR [dB]
30
25
20
15
@0.8 V
V
OUT
10
0.1 1 10 100 1000
f [kHz]
70
C
= C
= 0.1 µF, I
IN
65
60
55
50
45
40
35
SVR [dB]
30
25
20
15
10
OUT
0.1 1 10 100 1000
OUT
= 10 mA
f [kHz]
OUT
45
43
41
39
37
35
33
31
29
Noise voltage (mVrms/V)
27
25
0 2000 4000 6000 8000 10000
C
(nF)
OUT
OUT
= 0.8 V)
@0.8 V
V
OUT
V
= 1.5 V
OUT
Figure 15. Line transient (rising) V
V
= VCC = from 3.8 V to 5.5 V; I
EN
no C
OUT
OUT
V
= 1 mA; C
= 3.3 V Figure 16. Line transient (falling) V
OUT
= 3.3 V
OUT
= 0.1 µF;
IN
V
= V
EN
= from 5.5 V to 3.8 V; I
CC
no C
OUT
OUT
= 1 mA; C
V
OUT
OUT
= 3.3 V
= 0.1 µF;
IN
Doc ID 022166 Rev 2 9/16
= 3.3 V
Typical performance characteristics LDCL015XX, LDCL015XX33
Figure 17. Line transient (rising) Figure 18. Line transient (falling)
V
= 3.3 V
OUT
V
= V
EN
= from 3.8 V to 5.5 V; I
CC
C
= 1 µF
OUT
OUT
= 1 mA; C
= 0.1 µF;
IN
V
= 3.3 V
OUT
V
= V
EN
= from 5.5 V to 3.8 V; I
CC
C
= 1 µF
OUT
OUT
= 1 mA; C
= 0.1 µF;
IN
Figure 19. Load transient Figure 20. Load transient V
V
= 3.3 V
OUT
V
= V
EN
C
OUT
IN
= 3.8 V; I
= from 1 to 150 mA C
OUT
= 0.1 µF NO
IN
V
= V
EN
C
OUT
= 3.8 V; I
IN
= 1 µF
= from 1 to 150 mA C
OUT
OUT
= 3.3 V
V
= 3.3 V
OUT
= 0.1 µF
IN
10/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Application information
7 Application information
7.1 General operation
The main feature of the LDCL015 is its capability to operate with or without input and output
capacitors. To achieve this goal, the LDO architecture is based on a robust operational
amplifier which has sufficient phase margin over all positions of the output capacitor pole.
The LDCL015 can operate with a 100 nF output capacitor, but also without an output
capacitor, showing in both configurations good supply voltage rejection, stability and
dynamic performance.
7.2 Thermal and short-circuit protection
The LDCL015 is self-protected from short-circuit condition and overtemperature. When the
output load is higher than that supported by the device, the output current is increased until
the limit of 220 mA (typ) is reached, at which point the current is kept constant even when
the load impedance is zero.
Thermal protection acts when the junction temperature reaches 170 °C. At this point the IC
is completely shut down. As soon as the junction temperature falls back below 150 °C, the
device begins operating again.
To calculate the maximum power that the device can dissipate while keeping the junction
temperature below the T
, the following formula is used:
J-OP
Equation 1
P
DMAX
= (125-T
AMB
) / R
thJA
7.3 Output voltage setting for ADJ version
In the adjustable version, the output voltage can be set from 0.8 V up to the input voltage,
minus the voltage drop across the pass transistor (dropout voltage), by connecting a resistor
divider between the ADJ pin and the output, thus allowing remote voltage sensing.
The resistor divider should be selected using the following equation:
Equation 2
V
OUT
= V
(1 + R1 / R2), with V
ADJ
= 0.8 V (typ.)
ADJ
It is recommended to use resistors with values in the range of 10 kΩ to 50 kΩ. Lower values
can also be suitable, but will increase current consumption.
7.4 Enable pin
The LDCL015 features an enable function. When the EN voltage is higher than 2 V, the
device is ON; if it is lower than 0.8 V, the device is OFF.
In shutdown mode, the current consumption is lower than 1 µA.
The EN pin does not have an internal pull-up, which means that it cannot be left floating if it
is not used.
Doc ID 022166 Rev 2 11/16
Package mechanical data LDCL015XX, LDCL015XX33
8 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
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
12/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Package mechanical data
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
7049676D
Doc ID 022166 Rev 2 13/16
Package mechanical data LDCL015XX, LDCL015XX33
Tape & reel SOT23-xL mechanical data
Dim.
mm. inch.
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
14/16 Doc ID 022166 Rev 2
LDCL015XX, LDCL015XX33 Revision history
9 Revision history
Table 6. Document revision history
Date Revision Changes
05-Sep-2011 1 First release.
Added part number LDCL015XX to document heading and Ta b l e 1 .
15-Sep-2011 2
Modified document title.
Removed Section 8: Other output voltage versions of the LDCL015 available
on request.
Doc ID 022166 Rev 2 15/16
LDCL015XX, LDCL015XX33
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 TWO AUTHORIZED ST REPRESENTATIVES, 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.
© 2011 STMicroelectronics - All rights reserved
Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan -
STMicroelectronics group of companies
Malaysia - Malta - Morocco - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
16/16 Doc ID 022166 Rev 2
Loading...