JPY | USD

LD2980(AB,C)xx Datasheet

STMicroelectronics

Download PDF Datasheet

Datasheet

This is information on a product in full production.
December 2017 DocID6280 Rev 20 1/22
LD2980
Ultra low drop voltage regulators compatible
with low ESR output capacitors
Datasheet - production data
Features
Stable with low ESR ceramic capacitors
Ultra low dropout voltage (0.12 V typ. at 50 mA
load, 7 mV typ. at 1 mA load)
Very low quiescent current (80 µA typ. at no
load in on mode; max 1 µA in off mode)
Guaranteed output current up to 50 mA
Logic-controlled electronic shutdown
Output voltage of 1.8; 3.0; 3.3; 5.0 V
Internal current and thermal limit
± 0.5% Tolerance output voltage available (A
version)
Output low noise voltage 160 µVRMS
Temperature range: -40 to 125 °C
Smallest package SOT23-5L
Fast dynamic response to line and load
changes
Description
The low drop voltage and the ultra low quiescent
current make them suitable for low noise, low
power applications and in battery powered
systems. The quiescent current in sleep mode is
less than 1 µA when the INHIBIT pin is pulled low.
A shutdown logic control function is available on
pin n° 3 (TTL compatible). 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. The LD2980 is
designed to work with low ESR ceramic
capacitors. Typical applications are cellular
phone, laptop computer, personal digital assistant
(PDA), personal stereo, camcorder and camera.
SOT23-5L
Table 1. Device summary
Part numbers
AB version C version Output voltage
LD2980CM18TR 1.8 V
LD2980ABM30TR 3.0 V
LD2980ABM33TR LD2980CM33TR 3.3 V
LD2980ABM50TR LD2980CM50TR 5.0 V
www.st.com
Contents LD2980
2/22 DocID6280 Rev 20
Contents
1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Application notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1 External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.2 Input capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.3 Output capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.4 Important . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.5 Inhibit input operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.6 Reverse current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
DocID6280 Rev 20 3/22
LD2980 Diagram
22
1 Diagram
Figure 1. Schematic diagram
Pin configuration LD2980
4/22 DocID6280 Rev 20
2 Pin configuration
Figure 2. Pin connections (top view)
Table 2. Pin description
Pin n° Symbol Name and function
1V
IN Input port
2 GND Ground pin
3 INHIBIT Control switch ON/OFF. Inhibit is not internally pulled-up; it cannot be
left floating. Disable the device when connected to GND or to a
positive voltage less than 0.18 V
4 NC Not connected
5V
OUT Output port
Table 3. Thermal data
Symbol Parameter Value Unit
RthJC Thermal resistance junction-case 81 °C/W
RthJA Thermal resistance junction-ambient 255 °C/W
SOT23-5L
DocID6280 Rev 20 5/22
LD2980 Maximum ratings
22
3 Maximum ratings
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. Absolute maximum ratings
Symbol Parameter Value Unit
VIDC input voltage -0.3 to 16 V
VINH INHIBIT input voltage -0.3 to 16 V
IOOutput current Internally limited
PDPower dissipation Internally limited
TSTG Storage temperature range -55 to 150 °C
TOP Operating junction temperature range -40 to 125 °C
Typical application LD2980
6/22 DocID6280 Rev 20
4 Typical application
Figure 3. Application circuit
Note: Inhibit pin is not internally pulled-up then it must not be left floating. Disable the device when
connected to GND or to a positive voltage less than 0.18 V.
DocID6280 Rev 20 7/22
LD2980 Electrical characteristics
22
5 Electrical characteristics
(TJ = 25 °C, VI = VO(NOM) +1 V, CI = 1 µF, CO = 2.2 µF, IO = 1 mA, VINH = 2 V, unless
otherwise specified).
Table 5. Electrical characteristics for LD2980ABM
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOP Operating input voltage 2.5 16 V
VOOutput voltage
IO = 1 mA 2.985 3 3.015
VIO = 1 to 50 mA 2.978 3.023
IO = 1 to 50 mA, TJ= -40 to 125°C 2.925 3.075
VOOutput voltage
IO = 1 mA 3.284 3.3 3.317
VIO = 1 to 50 mA 3.275 3.325
IO = 1 to 50 mA, TJ= -40 to 125°C 3.217 3.383
VOOutput voltage
IO = 1 mA 4.975 5 5.025
VIO = 1 to 50 mA 4.963 5.038
IO = 1 to 50 mA, TJ= -40 to 125°C 4.875 5.125
VOLine regulation VO(NOM) + 1 < VIN < 16 V, IO = 1 mA 0.003 0.014 %/V
TJ= -40 to 125°C 0.032
IQ
Quiescent current
ON MODE
IO = 0 80 100
µA
IO = 0, TJ= -40 to 125°C 150
IO = 1 mA 100 150
IO = 1 mA, TJ= -40 to 125°C 200
IO = 10 mA 175 250
IO = 10 mA, TJ= -40 to 125°C 450
IO = 50 mA 500 700
IO = 50 mA, TJ= -40 to 125°C 1200
OFF MODE VINH < 0.18 V 0
VINH < 0.18 V, TJ= -40 to 125°C 1
VDROP Dropout voltage(1)
IO = 0 1 3
mV
IO = 0, TJ= -40 to 125°C 5
IO = 1mA 7 10
IO = 1mA, TJ= -40 to 125°C 15
IO = 10mA 40 60
IO = 10mA, TJ= -40 to 125°C 90
IO = 50mA 120 150
IO = 50mA, TJ= -40 to 125°C 225
Electrical characteristics LD2980
8/22 DocID6280 Rev 20
ISC Short circuit current RL = 0 150 mA
SVR Supply voltage rejection CO = 10µF, f = 1kHz 63 dB
VINH Inhibit input logic low LOW = Output OFF, TJ= -40 to 125°C 0.8 0.18 V
VINL Inhibit input logic high HIGH = Output ON, TJ= -40 to 125°C 1.6 1.3 V
IINH Inhibit input current VINH = 0V, TJ= -40 to 125°C 0 -1 µA
VINH = 5V, TJ= -40 to 125°C 5 15
eNOutput noise voltage BW = 300 Hz to 50 kHz, CO = 10µF 160 µVRMS
TSHDN Thermal shutdown 170 °C
1. For VO < 2.5 V dropout voltage can be calculated according to the minimum input voltage in full temperature range.
Table 5. Electrical characteristics for LD2980ABM (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
DocID6280 Rev 20 9/22
LD2980 Electrical characteristics
22
(TJ = 25 °C, VI = VO(NOM) +1 V, CI = 1 µF, CO = 2.2 µF, IO = 1 mA, VINH = 2 V, unless
otherwise specified).
Table 6. Electrical characteristics for LD2980CM
Symbol Parameter Test conditions Min. Typ. Max. Unit
VOP Operating input voltage 2.5 16 V
VOOutput voltage
IO = 1 mA 1.782 1.8 1.818
VIO = 1 to 50 mA 1.773 1.827
IO = 1 to 50 mA, TJ= -40 to 125°C 1.737 1.863
VOOutput voltage
IO = 1 mA 3.267 3.3 3.333
VIO = 1 to 50 mA 3.251 3.35
IO = 1 to 50 mA, TJ= -40 to 125°C 3.184 3.415
VOOutput voltage
IO = 1 mA 4.95 5 5.05
VIO = 1 to 50 mA 4.925 5.075
IO = 1 to 50 mA, TJ= -40 to 125°C 4.825 5.175
VOLine regulation VO(NOM) + 1 < VIN < 16 V, IO = 1 mA 0.003 0.014 %/V
TJ= -40 to 125°C 0.032
IQ
Quiescent current
ON MODE
IO = 0 80 100
µA
IO = 0, TJ= -40 to 125°C 150
IO = 1 mA 100 150
IO = 1 mA, TJ= -40 to 125°C 200
IO = 10 mA 175 250
IO = 10 mA, TJ= -40 to 125°C 450
IO = 50 mA 500 700
IO = 50 mA, TJ= -40 to 125°C 1200
OFF MODE VINH < 0.18 V 0
VINH < 0.18 V, TJ= -40 to 125°C 1
VDROP Dropout voltage (1)
IO = 0 1 3
mV
IO = 0, TJ= -40 to 125°C 5
IO = 1mA 7 10
IO = 1mA, TJ= -40 to 125°C 15
IO = 10mA 40 60
IO = 10mA, TJ= -40 to 125°C 90
IO = 50mA 120 150
IO = 50mA, TJ= -40 to 125°C 225
ISC Short circuit current RL = 0 150 mA
SVR Supply voltage rejection CO = 10µF, f = 1kHz 63 dB
Electrical characteristics LD2980
10/22 DocID6280 Rev 20
VINH Inhibit input logic low LOW = Output OFF, TJ= -40 to 125°C 0.8 0.18 V
VINL Inhibit input logic high HIGH = Output ON, TJ= -40 to 125°C 1.6 1.3 V
IINH Inhibit input current VINH = 0V, TJ= -40 to 125°C 0 -1 µF
VINH = 5V, TJ= -40 to 125°C 5 15
eNOutput noise voltage BW = 300 Hz to 50 kHz, CO = 10µF 160 µVRMS
TSHDN Thermal shutdown 170 °C
1. For VO < 2.5 V dropout voltage can be calculated according to the minimum input voltage in full temperature range.
Table 6. Electrical characteristics for LD2980CM (continued)
Symbol Parameter Test conditions Min. Typ. Max. Unit
DocID6280 Rev 20 11/22
LD2980 Typical performance characteristics
22
6 Typical performance characteristics
(TJ = 25 °C, VI = VO(NOM) +1 V, CI = 1 µF, CO = 2.2 µF, VINH = 2 V, unless otherwise
specified)
Figure 4. Output voltage vs temperature Figure 5. Output voltage vs temperature
Figure 6. Line regulation vs temperature Figure 7. Load regulation vs temperature
Typical performance characteristics LD2980
12/22 DocID6280 Rev 20
Figure 8. Dropout voltage vs temperature Figure 9. Quiescent current vs temperature
Figure 10. Quiescent current vs output
current Figure 11. Off mode quiescent current vs
temperature
Figure 12. Quiescent current vs input voltage Figure 13. Dropout voltage vs output current
DocID6280 Rev 20 13/22
LD2980 Typical performance characteristics
22
Figure 14. Inhibit input current vs temperature Figure 15. Inhibit voltage vs temperature
Figure 16. Supply voltage rejection vs
frequency Figure 17. Noise voltage vs frequency
Figure 18. Best case: highest output version Figure 19. Worst case: lowest output version
Typical performance characteristics LD2980
14/22 DocID6280 Rev 20
Figure 20. Load transient response Figure 21. Line transient response
VO = 4.7V, IO = 1 to 100mA, CO = 4.7µF (X7R)
VI = [VO(NOM) +1V], VO = 4.7V, IO = 100mA, CO = 4.7µF
(X7R)
DocID6280 Rev 20 15/22
LD2980 Application notes
22
7 Application notes
7.1 External capacitors
Like any low-dropout regulator, the LD2980 requires external capacitors for regulator
stability. This capacitor must be selected to meet the requirements of minimum capacitance
and equivalent series resistance (please refer to Figure 18 and Figure 19). We suggest to
solder input and output capacitors as close as possible to the relative pins.
7.2 Input capacitor
An input capacitor whose value is 1 µF is required with the LD2980 (amount of capacitance
can be increased without limit). This capacitor must be located a distance of not more than
0.5" from the input pin of the device and returned to a clean analog ground. Any good quality
ceramic, tantalum or film capacitors can be used for this capacitor.
7.3 Output capacitor
The LD2980 is designed specifically to work with ceramic output capacitors. It may also be
possible to use Tantalum capacitors, but these are not as attractive for reasons of size and
cost. By the way, the output capacitor must meet both the requirement for minimum amount
of capacitance and ESR (equivalent series resistance) value. The Figure 18 and Figure 19
show the allowable ESR range as a function of the output capacitance. These curves
represent the stability region over the full temperature and IO range. Due to the different
loop gain, the stability improves for higher output versions and so the suggested minimum
output capacitor value, if low ESR ceramic type is used, is 1 µF for output voltages equal or
major than 3.8 V, 2.2 µF for output voltages from 2.85 to 3.3 V, and 3.3 µF for the other
versions. However, if an output capacitor lower than the suggested one is used, it’s possible
to make stable the regulator adding a resistor in series to the capacitor (see Figure 18 and
Figure 19 to choose the right value according to the used version and keeping in account
that the ESR of ceramic capacitors has been measured @ 100 kHz).
7.4 Important
The output capacitor must maintain its ESR in the stable region over the full operating
temperature to assure stability. Also, capacitor tolerance and variation with temperature
must be considered to assure the minimum amount of capacitance is provided at all times.
This capacitor should be located not more than 0.5" from the output pin of the device and
returned to a clean analog ground.
7.5 Inhibit input operation
The inhibit pin can be used to turn OFF the regulator when pulled low, so drastically
reducing the current consumption down to less than 1 µA. When the inhibit feature is not
used, this pin must be tied to VI to keep the regulator output ON at all times. To assure
proper operation, the signal source used to drive the inhibit pin must be able to swing above
Application notes LD2980
16/22 DocID6280 Rev 20
and below the specified thresholds listed in the electrical characteristics section under VIH
VIL. Any slew rate can be used to drive the inhibit.
7.6 Reverse current
The power transistor used in the LD2980 has not an inherent diode connected between the
regulator input and output. If the output is forced above the input, no current will flow from
the output to the input across the series pass transistor. When a VREV voltage is applied on
the output, the reverse current measured, according to the test circuit in Figure 22, flows to
the GND across the two feedback resistors. This current typical value is 160 µA. R1 and R2
resistors are implanted type; typical values are, respectively, 42.6 k and 51.150 k.
Figure 22. Reverse current test circuit
DocID6280 Rev 20 17/22
LD2980 Package mechanical data
22
8 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.
Table 7. SOT23-5L mechanical data
Dim. mm
Min. Typ. Max.
A 0.90 1.45
A1 0 0.15
A2 0.90 1.30
b 0.30 0.50
c 2.09 0.20
D2.95
E1.60
e0.95
H2.80
L 0.30 0.60
08
Package mechanical data LD2980
18/22 DocID6280 Rev 20
Figure 23. SOT23-5L mechanical drawing
Figure 24. SOT23-5L recommended footprint (dimensions in mm)
BN
BN
DocID6280 Rev 20 19/22
LD2980 Packaging mechanical data
22
9 Packaging mechanical data
Table 8. Tape and reel SOT23-5L mechanical data
Dim. mm
Min. Typ. Max.
A180
C 12.8 13.0 13.2
D 20.2
N60
T14.4
Ao 3.13 3.23 3.33
Bo 3.07 3.17 3.27
Ko 1.27 1.37 1.47
Po 3.9 4.0 4.1
P3.94.04.1
Packaging mechanical data LD2980
20/22 DocID6280 Rev 20
Figure 25. Tape and reel SOT23-5L mechanical drawing
DocID6280 Rev 20 21/22
LD2980 Revision history
22
10 Revision history
Table 9. Document revision history
Date Revision Changes
03-Jul-2006 13 Order codes updated and new template.
13-Nov-2006 14 Add part number LD2980ABU18TR.
06-Sep-2007 15 Add Table 1 on page 1.
14-Feb-2008 16 Modified: Table 1 on page 1.
11-Jul-2008 17 Modified: Table 1 on page 1.
06-Nov-2013 18
Document name changed from LD2980ABxx and LD2980Cxx to
LD2980.
Updated Table 1: Device summary, Table 5: Electrical characteristics
for LD2980ABM, Table 6: Electrical characteristics for LD2980CM
and Section 8: Package information.
Added Section 9: Packaging information.
Minor text changes in title, in features and description in cover page.
30-Aug-2017 19
Removed 5.0 V versions of device (updated Features, Table 1:
Device summary, Table 5: Electrical characteristics for LD2980ABM,
and Table 6: Electrical characteristics for LD2980C.
Minor textual updates.
07-Dec-2017 20 Updated Table 1: Device summary on the cover page.
LD2980
22/22 DocID6280 Rev 20
IMPORTANT NOTICE – PLEASE READ CAREFULLY
STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and
improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on
ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order
acknowledgement.
Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or
the design of Purchasers’ products.
No license, express or implied, to any intellectual property right is granted by ST herein.
Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product.
ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners.
Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2017 STMicroelectronics – All rights reserved

Products

IC REG LINEAR 3V 50MA SOT23-5
入手可能な数量54501
単価71
IC REG LINEAR 3.3V 50MA SOT23-5
入手可能な数量25885
単価66
IC REG LINEAR 1.8V 50MA SOT23-5
入手可能な数量3719
単価75
IC REG LINEAR 3.3V 50MA SOT23-5
入手可能な数量2951
単価66
IC REG LINEAR 5V 50MA SOT23-5
入手可能な数量1449
単価68
IC REG LINEAR 2.5V 50MA SOT23-5
入手可能な数量2896
単価173
IC REG LINEAR 5V 50MA SOT23-5
入手可能な数量805
単価67
IC REG LINEAR 1.8V 50MA SOT23-5
入手可能な数量0
単価0
IC REG LINEAR 2.5V 50MA SOT23-5
入手可能な数量0
単価0
IC REG LINEAR 1.8V 50MA SOT89-3
入手可能な数量0
単価0
IC REG LINEAR 5V 50MA SOT89-3
入手可能な数量0
単価0
IC REG LINEAR 1.8V 100MA SOT23-5
入手可能な数量0
単価0
IC REG LINEAR 3.6V 50MA SOT23-5
入手可能な数量0
単価0
IC REG LINEAR 3.6V 50MA SOT23-5
入手可能な数量0
単価0
IC REG LINEAR 1.8V 100MA SOT89-3
入手可能な数量0
単価0
IC REG LINEAR 3.3V 50MA SOT89-3
入手可能な数量0
単価0