STMicroelectronics LDS3985PM26R Ultra low drop-low noise bicmos 300 ma voltage regulator for use with very low esr output capacitor Datasheet

LDS3985xx
Ultra low drop-low noise BiCMOS 300 mA voltage
regulator for use with very low ESR output capacitor
Features
■
Input voltage from 2.5 V to 6 V
■
Stable with low ESR ceramic capacitors
■
Ultra low dropout voltage (150 mV typ. at 300
mA load, 0.4 mV typ. at 1 mA load)
■
Very low quiescent current (85 µA typ. at no
load, 200 µA typ. at 300 mA load; max 1.5 µA
in off mode)
■
Guaranteed output current up to 300 mA
■
Wide range of output voltage:
– from 1.25 V to 5.0 V
■
Fast turn-on time: typ. 240 µs
– [CO = 2.2 µF, CBYP = 33 nF and IO = 1 mA]
■
Logic-controlled electronic shutdown
■
Internal current and thermal limit
■
Output low noise voltage 30 µVRMS over 10 Hz
to 100 kHz
■
SVR of 55 dB at 1 kHz, 50 dB at 10 kHz
■
Temperature range: - 40 °C to 125 °C
Description
DFN6
SOT23-5L
makes it suitable for low power applications and in
battery powered systems. Regulator ground
current increases only slightly in dropout, further
prolonging the battery life. Shutdown logic control
function is available, this means that when the
device is used as local regulator, it is possible to
put a part of the board in standby, decreasing the
total power consumption. Typical applications are
in mobile phone and similar battery powered
wireless systems, portable information
appliances.
The LDS3985xx provides up to 300 mA, from 2.5
V to 6 V input voltage. It is stable with ceramic and
high quality tantalum capacitor. The ultra low drop
voltage, low quiescent current and low noise
Table 1.
July 2010
Device summary
Part numbers
Output voltages
LDS3985XX15
1.5 V
LDS3985XX18
1.8 V
LDS3985XX25
2.5 V
LDS3985XX28
2.8 V
LDS3985XX30
3.0 V
LDS3985XX33
3.3 V
LDS3985XX50
5.0 V
Doc ID 11039 Rev 7
1/20
www.st.com
20
Contents
LDS3985xx
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8
Order codes
9
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2/20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Doc ID 11039 Rev 7
LDS3985xx
Diagram
1
Diagram
Figure 1.
Schematic diagram
Doc ID 11039 Rev 7
3/20
Pin configuration
LDS3985xx
2
Pin configuration
Figure 2.
Pin connections (top view for SOT23-5L, top through view for DFN6)
SOT23-5L
Table 2.
DFN6
Pin description
Pin n° for
SOT23-5L
Pin n° for
DFN6
Symbol
1
1
VI
2
5
GND
Common ground
3
6
VINH
Inhibit input voltage: on mode when VINH ≥ 1.2 V, off mode when VINH ≤
0.4 V (Do not leave floating, not internally pulled down/up)
4
4
BYPASS
5
3
VO
-
2
N.C.
4/20
Name and function
Input voltage of the LDO
Bypass pin: connect an external capacitor (usually 10 nF) to minimize
noise voltage
Output voltage of the LDO
Not connect
Doc ID 11039 Rev 7
LDS3985xx
Typical application
3
Typical application
Figure 3.
Typical application circuit
Doc ID 11039 Rev 7
5/20
Maximum ratings
LDS3985xx
4
Maximum ratings
Table 3.
Absolute maximum ratings
Symbol
Parameter
Value
Unit
(1)
VI
DC input voltage
VO
DC output voltage
-0.3 to VI+0.3
V
INHIBIT input voltage
-0.3 to VI+0.3
V
VINH
-0.3 to 6
IO
Output current
Internally limited
PD
Power dissipation
Internally limited
V
TSTG
Storage temperature range
-65 to 150
°C
TOP
Operating junction temperature range
-40 to 125
°C
1. The input pin is able to withstand non repetitive spike of 6.5 V for 200 ms.
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
SOT23-5L
DFN6
Unit
RthJC
Thermal resistance junction-case
81
10
°C/W
RthJA
Thermal resistance junction-ambient
255
55
°C/W
6/20
Doc ID 11039 Rev 7
LDS3985xx
5
Electrical characteristics
Electrical characteristics
TJ = 25 °C, VI = VO(NOM) + 0.5 V, CI = 1 µF, CO = 2.2 µF, CBYP = 33 nF, IO = 1 mA,
VINH = 1.4 V, unless otherwise specified.
Table 5.
Electrical characteristics for LDS3985xx
Symbol
Parameter
VI
Operating input voltage
VO
Output voltage < 2.5 V
VO
Output voltage ≥ 2.5 V
ΔVO
Line regulation (1)
Test conditions
Min.
Typ.
Max.
Unit
2.5
6
V
IO = 1 mA
-50
50
TJ = - 40 to 125 °C
-75
75
IO = 1 mA
-2
2
TJ= - 40 to 125 °C
-3
3
VI = VO(NOM) + 0.5 to 6 V,
TJ = - 40 to 125 °C
-0.1
0.1
VO = 4.7 to 5 V
-0.19
mV
% of
VO(NOM)
%/V
0.19
ΔVO
Load regulation
IO = 1 mA to 300 mA, VO ≤ 2.5 V
TJ = - 40 to 125 °C
0.005
0.01
%/mA
ΔVO
Load regulation
IO = 1 mA to 300 mA, VO ≥ 2.5 V
TJ = - 40 to 125 °C
0.0008
0.004
%/mA
ΔVO
Output AC line regulation
VI = VO(NOM) + 1 V, IO = 300 mA,
tR = tF = 30 µs
5
IO = 0
85
IQ
(2)
IO = 0, TJ = - 40 to 125 °C
Quiescent current
ON MODE: VINH = 1.24 V I = 0 to 300 mA
O
mVPP
150
200
µA
IO = 0 to 300 mA, TJ = - 40 to 125 °C
300
0.003
OFF MODE: VINH = 0.4 V
TJ = - 40 to 125 °C
1.5
IO = 1 mA
0.4
IO = 1 mA, TJ = -40 to 125 °C
VDROP
Dropout voltage (3)
2
IO = 150 mA
60
mV
IO = 150 mA, TJ = - 40 to 125 °C
100
IO = 300 mA
150
IO = 300 mA, TJ = - 40 to 125 °C
ISC
SVR
IO(PK)
Short circuit current
RL = 0
Supply voltage rejection
VI = VO(NOM)+0.25 V ±
VRIPPLE = 0.1 V, IO = 50 mA
For VO(NOM) < 2.5 V,
VI = 2.55 V
Peak output current
250
600
VO ≥ VO(NOM) - 5 %
Doc ID 11039 Rev 7
f = 1 kHz
55
f = 10 kHz
50
mA
dB
300
550
mA
7/20
Electrical characteristics
Table 5.
Symbol
LDS3985xx
Electrical characteristics for LDS3985xx (continued)
Parameter
Test conditions
Min.
Typ.
Inhibit input logic High
Unit
0.4
Inhibit input logic Low
VINH
Max.
VI = 2.5 V to 6 V, TJ= - 40 to 125 °C
V
1.4
IINH
Inhibit input current
VINH = 0.4 V, VI = 6 V
±1
nA
eN
Output noise voltage
BW = 10 Hz to 100 kHz, CO = 2.2 µF
30
µVRMS
CBYP = 33 nF
240
µs
(5)
160
°C
tON
TSHDN
Turn On time
(4)
Thermal shutdown
Capacitance
CO
2.2
22
µF
5
5000
mΩ
Output capacitor
ESR
1. For VO(NOM) < 2 V, VI = 2.5 V
2. For VO(NOM) = 1.25 V, VI = 2.5 V
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 input voltages below 2.5 V
4. Turn-on time is time measured between the enable input just exceeding VINH high value and the output voltage just
reaching 95 % of its nominal value
5. Typical thermal protection hysteresis is 20 °C
8/20
Doc ID 11039 Rev 7
LDS3985xx
Typical performance characteristics
6
Typical performance characteristics
Figure 4.
TJ = 25 °C, VI = VO(NOM) + 0.5 V, CI = 1 µF, CO = 2.2 µF, CBYP = 33 nF, IO = 1 mA,
VINH = 1.4 V, unless otherwise specified.
Output voltage vs. temp. (VI = 2.5 V) Figure 5.
Output voltage vs. temp. (VI = 3.2 V)
Figure 6.
Output voltage vs. temp. (VI = 3.8 V) Figure 7.
Shutdown voltage vs. temperature
(VO = 1.35 V)
Figure 8.
Shutdown voltage vs. temperature
(VO = 3.3 V)
Line regulation vs. temperature
(VI = 2.5 V to 6 V)
Figure 9.
Doc ID 11039 Rev 7
9/20
Typical performance characteristics
LDS3985xx
Figure 10. Line regulation vs. temperature
(VI = 3.2 V to 6 V)
Figure 11. Line regulation vs. temperature
(VI = 3.8 V to 6 V)
Figure 12. Quiescent current vs. temperature
(VI = 2.5 V)
Figure 13. Quiescent current vs. temperature
(VI = 6 V)
Figure 14. Quiescent current vs. temperature
(VI = 3.4 V)
Figure 15. Supply voltage rejection vs.
frequency
10/20
Doc ID 11039 Rev 7
LDS3985xx
Typical performance characteristics
Figure 16. Dropout voltage vs. temperature
Figure 17. Dropout voltage vs. output current
Figure 18. Inhibit transient
VI = 5 V, IO = 1 mA, VINH = 0 to 1.2 V, CI = CO = 1 µF (cer),
CBYP = 10 nF, TR = TF = 1 µs
Doc ID 11039 Rev 7
11/20
Package mechanical data
7
LDS3985xx
Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK® is an ST trademark.
12/20
Doc ID 11039 Rev 7
LDS3985xx
Package mechanical data
SOT23-5L mechanical data
mm.
mils.
Dim.
Min.
Typ.
Max.
Min.
Typ.
Max.
A
0.90
1.45
35.4
57.1
A1
0.00
0.10
0.0
3.9
A2
0.90
1.30
35.4
51.2
b
0.35
0.50
13.7
19.7
C
0.09
0.20
3.5
7.8
D
2.80
3.00
110.2
118.1
E
1.50
1.75
59.0
68.8
e
0.95
37.4
H
2.60
3.00
102.3
118.1
L
0.10
0.60
3.9
23.6
7049676D
Doc ID 11039 Rev 7
13/20
Package mechanical data
LDS3985xx
DFN6 (3x3 mm) mechanical data
mm.
inch.
Dim.
Min.
Typ.
Max.
Min.
Typ.
Max.
A
0.80
0.90
1.00
0.031
0.035
0.039
A1
0
0.02
0.05
0
0.001
0.002
A3
0.20
0.008
b
0.23
0.30
0.38
0.009
0.012
0.015
D
2.90
3.00
3.10
0.114
0.118
0.122
D2
2.23
2.38
2.48
0.088
0.094
0.098
E
2.90
3.00
3.10
0.114
0.118
0.122
E2
1.50
1.65
1.75
0.059
0.065
0.069
e
L
0.95
0.30
0.40
0.037
0.50
0.012
0.016
0.020
7946637A
14/20
Doc ID 11039 Rev 7
LDS3985xx
Package mechanical data
DFN6D (3x3 mm) mechanical data
mm.
inch.
Dim.
Min.
A
0.80
A1
0
A3
0.02
Max.
Min.
1.00
0.031
0.05
0
0.20
b
0.23
D
2.90
D2
2.23
E
2.90
E2
1.50
e
L
Typ.
3.00
3.00
0.40
Max.
0.039
0.001
0.002
0.008
0.45
0.009
3.10
0.114
2.50
0.088
3.10
0.114
1.75
0.059
0.95
0.30
Typ.
0.018
0.118
0.122
0.098
0.118
0.122
0.069
0.037
0.50
0.012
0.016
0.020
7946637B
Doc ID 11039 Rev 7
15/20
Package mechanical data
LDS3985xx
Tape & reel SOT23-xL mechanical data
mm.
inch.
Dim.
Min.
Typ.
A
Min.
Typ.
180
13.0
13.2
Max.
7.086
C
12.8
D
20.2
0.795
N
60
2.362
T
16/20
Max.
0.504
0.512
14.4
0.519
0.567
Ao
3.13
3.23
3.33
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
Doc ID 11039 Rev 7
LDS3985xx
Package mechanical data
Tape & reel QFNxx/DFNxx (3x3) mechanical data
mm.
inch.
Dim.
Min.
Typ.
A
Max.
Min.
Typ.
180
13.2
7.087
C
12.8
D
20.2
0.795
N
60
2.362
T
0.504
0.519
14.4
0.567
Ao
3.3
0.130
Bo
3.3
0.130
Ko
1.1
0.043
Po
4
0.157
P
8
0.315
Doc ID 11039 Rev 7
Max.
17/20
Order codes
LDS3985xx
8
Order codes
Table 6.
Order codes
Packages
Output voltage
SOT23-5L
DFN6
LDS3985M125R (1)
LDS3985PM12R (1)
1.25 V
(1)
LDS3985PM13R
(1)
1.35 V
LDS3985PM15R
(1)
LDS3985PM18R
(1)
1.8 V
LDS3985M20R (1)
LDS3985PM20R (1)
2.0 V
LDS3985M21R
(1)
LDS3985PM21R
(1)
2.1 V
LDS3985M22R
(1)
LDS3985PM22R
(1)
2.2 V
LDS3985PM25R
(1)
2.5 V
LDS3985M26R (1)
LDS3985PM26R (1)
2.6 V
(1)
(1)
2.7 V
LDS3985M135R
LDS3985M15R
LDS3985M18R
LDS3985M25R
LDS3985M27R
DFN6D
LDS3985PM27R
LDS3985M28R
LDS3985M285R
(1)
LDS3985M29R (1)
LDS3985PU15R
LDS3985PU28R
LDS3985PM285R
(1)
1.5 V
2.8 V
2.85 V
LDS3985PM29R (1)
2.9 V
LDS3985PM30R
(1)
3.0 V
LDS3985PM47R
(1)
4.7 V
LDS3985M48R (1)
LDS3985PM48R (1)
4.8 V
(1)
LDS3985PM49R
(1)
4.9 V
LDS3985PM50R
(1)
5.0 V
LDS3985M30R
LDS3985M33R
LDS3985M47R
LDS3985M49R
(1)
LDS3985M50R
LDS3985PU33R
1. Available on request.
18/20
Doc ID 11039 Rev 7
3.3 V
LDS3985xx
Revision history
9
Revision history
Table 7.
Document revision history
Date
Revision
Changes
02-Dec-2004
1
First release.
10-Apr-2007
2
Added: new package TSOT23-5L.
16-May-2007
3
Added: new mechanical data DFN6D and order codes updated.
06-Sep-2007
4
Added: Table 1 in cover page.
11-Jun-2008
5
Modified: Table 6 on page 18.
11-Jul-2009
6
Modified: Table 6 on page 18.
29-Jul-2010
7
Modified: Table 1 on page 1 and Table 6 on page 18.
Doc ID 11039 Rev 7
19/20
LDS3985xx
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.
© 2010 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 - Philippines - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America
www.st.com
20/20
Doc ID 11039 Rev 7