LD2982AM25R STMicroelectronics, LD2982AM25R Datasheet

IC REG LDO 2.5V 50MA SOT23-5L

LD2982AM25R

Manufacturer Part Number
LD2982AM25R
Description
IC REG LDO 2.5V 50MA SOT23-5L
Manufacturer
STMicroelectronics
Datasheet

Specifications of LD2982AM25R

Regulator Topology
Positive Fixed
Voltage - Output
2.5V
Voltage - Input
Up to 16V
Voltage - Dropout (typical)
0.12V @ 50mA
Number Of Regulators
1
Current - Output
50mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Limit (min)
-
Other names
497-3486-2

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Part Number:
LD2982AM25R
Manufacturer:
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LD2982AM25R
Manufacturer:
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Quantity:
20 000
Features
Description
The LD2982 is a 50 mA fixed output voltage
regulator. The ultra low drop voltage and the low
quiescent current make them particularly suitable
for low noise, low power applications, and in
battery powered systems. In sleep mode
quiescent current is less than 1 µA when INHIBIT
pin is pulled low. Shutdown logic control function
is available on pin 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.
An external capacitor C
between bypass pin and GND reduce the noise to
30 µVrms.
Table 1.
July 2009
Very low dropout voltage (120 mV at 50 mA
and 7 mV at 1 mA load)
Very low quiescent current (375 mA typ. at
50 mA load and 75 mA at 1 mA)
Output current up to 50 mA
Logic controlled electronic shutdown
Output voltage of 1.8 V
Internal current and thermal limit
Available in ± 1 % tolerance
(at 25 °C, A version)
Supply voltage rejection: 45 dB (typ)
Only 1 µF for stability
Low output noise voltage 30 µVrms
Smallest package SOT23-5L
Temperature range: -40 °C to 125 °C
Device summary
LD2982BM18R
Order code
BYP
Very low drop and low noise voltage regulator with
= 10 nF connected
inhibit function, low ESR capacitors compatible
Doc ID 8188 Rev 7
Typical application are in cellular phone,
palmtop/laptop computer, personal digital
assistant (PDA), personal stereo, camcorder and
camera.
Output voltage
LD2982BXX18
SOT23-5L
1.8 V
www.st.com
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LD2982AM25R Summary of contents

Page 1

Very low drop and low noise voltage regulator with Features ■ Very low dropout voltage (120 and load) ■ Very low quiescent current (375 mA typ load and ...

Page 2

Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 3

Diagram Figure 1. Schematic diagram Doc ID 8188 Rev 7 3/17 ...

Page 4

Pin configuration Figure 2. Pin connections (top view) Table 2. Pin description Pin n° Symbol 1 IN Input port 2 GND Ground pin Control switch ON/OFF. Inhibit is not internally pulled-up; it cannot be left floating. 3 INHIBIT Disable ...

Page 5

Maximum ratings Table 4. Absolute maximum ratings Symbol V DC input voltage I V INHIBIT input voltage INH I Output current O P Power dissipation D T Storage temperature range STG T Operating junction temperature range OP Note: Absolute ...

Page 6

Electrical characteristics ° specified. Table 5. Electrical characteristics for LD2982BXX18 Symbol Parameter V Operating input voltage OP V Output voltage O V Output voltage O V Output voltage O V ...

Page 7

Table 5. Electrical characteristics for LD2982BXX18 (continued) Symbol Parameter V Output voltage O V Output voltage O V Output voltage O V Output voltage O I Short circuit current SC ΔV /ΔV Line regulation Dropout voltage DROP ...

Page 8

Typical characteristics ( ° otherwise specified). Figure 3. Output voltage vs. temperature Figure 5. Dropout voltage vs. output current Figure 6. Figure 7. Quiescent current vs. temperature 8/ ...

Page 9

Figure 9. Supply voltage rejection vs. output current Figure 11. Supply voltage rejection vs. frequency Figure 13. Line transient V = 2.5V 50mA 4.7µ Figure 10. Supply voltage ...

Page 10

Figure 15. Load transient V = 2.5V 50mA 10µ 10/17 Figure 16. Load transient V = 2.5V 50mA =2ns ...

Page 11

Application notes 6.1 External capacitors Like any low-dropout regulator, the LD2982 requires external capacitors for regulator stability. This capacitor must be selected to meet the requirements of minimum capacitance and equivalent series resistance. We suggest to solder input and ...

Page 12

Reverse current The power transistor used in the LD2982 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 ...

Page 13

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. ® ...

Page 14

Dim. Min. A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2. 2.60 L 0.10 14/17 SOT23-5L mechanical data mm. Typ. Max. 1.45 0.10 1.30 0.50 0.20 3.00 1.75 0.95 3.00 0.60 Doc ID ...

Page 15

Tape & reel SOT23-xL mechanical data mm. Dim. Min. Typ 12.8 13 3.13 3.23 Bo 3.07 3.17 Ko 1.27 1.37 Po 3.9 4.0 P 3.9 4.0 Max. Min. 180 13.2 0.504 0.795 ...

Page 16

Revision history Table 6. Document revision history Date Revision 25-Jul-2006 4 14-Feb-2008 5 10-Jul-2008 6 29-Jul-2009 7 16/17 Changes Order codes updated. Added: Table 1 on page 1. Modified: Table 1 on page 1 and Table 5 on page ...

Page 17

... 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. ...

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