LK112SM18TR STMicroelectronics, LK112SM18TR Datasheet

IC REG LDO 200MA 1.8V SOT23-5

LK112SM18TR

Manufacturer Part Number
LK112SM18TR
Description
IC REG LDO 200MA 1.8V SOT23-5
Manufacturer
STMicroelectronics
Datasheet

Specifications of LK112SM18TR

Regulator Topology
Positive Fixed
Voltage - Output
1.8V
Voltage - Input
2.5 ~ 14 V
Number Of Regulators
1
Current - Output
200mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
SOT-23-5, SC-74A, SOT-25
Number Of Outputs
1
Polarity
Positive
Input Voltage Max
14 V
Output Voltage
1.8 V
Output Type
Fixed
Dropout Voltage (max)
0.5 V at 200 mA
Output Current
200 mA
Line Regulation
40 mV
Load Regulation
90 mV
Voltage Regulation Accuracy
2 %
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Dropout (typical)
-
Current - Limit (min)
-
Lead Free Status / Rohs Status
 Details
Other names
497-7811-2
LK112SM18TR
Features
Description
The LK112Sxx is a low dropout linear regulator
with a built in electronic switch. The internal
switch can be controlled by TTL or CMOS logic
levels. The device is ON state when the control
pin is pulled to a logic high level. An external
capacitor can be used connected to the noise
bypass pin to lower the output noise level to 30
Table 1.
July 2008
Output current up to 200 mA
Low dropout voltage (500 mV max at
I
Very low quiescent current: 0.1 µA in OFF
mode and max 250 µA in ON mode at
I
Low output noise: typ. 30 µV at I
and 10 Hz < f < 80 kHz
Wide range of output voltages
Internal current and thermal limit
V
Operative input voltage from:
V
or from 2.5 V to 14 V (for V
OUT
OUT
OUT
OUT
LK112SXX13
LK112SXX14
LK112SXX18
LK112SXX19
LK112SXX20
LK112SXX21
LK112SXX22
LK112SXX23
= 200 mA)
= 0 mA
+ 0.5 to 14 V (for V
tolerance ± 2% (at 25 °C)
Low noise low drop voltage regulator with shutdown function
Device summary
OUT
OUT
> 2 V)
LK112SXX24
LK112SXX26
LK112SXX28
LK112SXX29
LK112SXX31
LK112SXX33
LK112SXX34
LK112SXX35
< 2 V)
OUT
= 60 mA
Part numbers
Rev 11
µVrms. An internal PNP pass transistor is used to
achieve a low dropout voltage.
The LK112Sxx has a very low quiescent current
in ON MODE while in OFF MODE the Iq is
reduced down to 100 nA max. The internal
thermal shutdown circuitry limits the junction
temperature to below 150 °C. The load current is
internally monitored and the device will shutdown
in the presence of a short circuit or overcurrent
condition at the output.
LK112SXX36
LK112SXX37
LK112SXX38
LK112SXX39
LK112SXX41
LK112SXX42
LK112SXX43
LK112SXX44
SOT23-5L
LK112Sxx
LK112SXX45
LK112SXX46
LK112SXX47
LK112SXX48
LK112SXX49
LK112SXX50
www.st.com
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LK112SM18TR Summary of contents

Page 1

Low noise low drop voltage regulator with shutdown function Features ■ Output current up to 200 mA ■ Low dropout voltage (500 mV max 200 mA) OUT ■ Very low quiescent current: 0.1 µA in OFF mode ...

Page 2

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

Page 3

Diagram Figure 1. Schematic diagram 3/17 ...

Page 4

Pin configuration Figure 2. Pin connection (top view) Table 2. Pin description Pin n° Symbol Shutdown Input: Disables the regulator when is connected to GND or to positive 1 SHDN voltage less than 0.6 V Ground Pin: Internally connected ...

Page 5

Maximum ratings Table 3. Absolute maximum ratings Symbol V DC input voltage input voltage SHDN I Output current O T Storage temperature range STG T Operating junction temperature range OP Table 4. Thermal data Symbol R ...

Page 6

Electrical characteristics Table 5. Electrical characteristics for LK112S ( 1 µF, C SHDN I Symbol Parameter I Quiescent current d V Output voltage O ΔV Line regulation O ΔV Load regulation O V ...

Page 7

Typical characteristics (Unless otherwise specified, T Figure 3. Output voltage vs temperature Figure 5. Line regulation vs temperature Figure 7. Dropout voltage vs temperature = 25 ° µ 2.2 µ ...

Page 8

Figure 9. Output voltage vs input voltage Figure 11. Shutdown current vs shutdown voltage Figure 13. Supply voltage rejection vs output current 8/17 Figure 10. Shutdown voltage vs temperature Figure 12. Supply voltage rejection vs temperature Figure 14. Supply voltage ...

Page 9

Figure 15. Supply voltage rejection vs temperature Figure 17. Quiescent current vs input voltage Figure 18. Quiescent current vs shutdown Figure 19. Quiescent current vs temperature Figure 16. Quiescent current vs temperature voltage Figure 20. Reverse current vs reverse voltage ...

Page 10

Figure 21. Stability Figure 23. Start-up transient V =3.5V, V =2.5V 1.8V SHDN C =4.7µF, C =10nF O BYP Figure 25. Line transient V =3.5 to 4.5V, V =2.5V 1.8V, I ...

Page 11

Figure 27. Line transient V =3.5 to 4.5V, V =2.5V 1.8V SHDN C =1µF, C =1nF =2µs O BYP s f Figure 29. Load transient V =3.5V, V =2.5V 1.8V, I ...

Page 12

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 ...

Page 13

SOT23-5L mechanical data mm. Dim. Min. Typ. A 0.90 A1 0.00 A2 0.90 b 0.35 C 0.09 D 2.80 E 1.50 e 0.95 H 2.60 L 0.10 mils. Max. Min. Typ. 1.45 35.4 0.10 0.0 1.30 35.4 0.50 13.7 0.20 ...

Page 14

Tape & reel SOT23-xL mechanical data Dim. Min 12 3.13 Bo 3.07 Ko 1.27 Po 3.9 P 3.9 14/17 mm. Typ. Max. Min. 180 13.0 13.2 0.504 0.795 2.362 14.4 3.23 3.33 ...

Page 15

... Order codes Table 6. Order codes Part number Output voltage (1) LK112SM13TR 1.3V (1) LK112SM14TR 1.4V LK112SM18TR 1.8V (1) LK112SM19TR 1.9V (1) LK112SM20TR 2.0V (1) LK112SM21TR 2.1V (1) LK112SM22TR 2.2V (1) LK112SM23TR 2.3V (1) LK112SM24TR 2.4V (1) LK112SM26TR 2.6V LK112SM28TR 2.8V (1) LK112SM29TR 2.9V (1) LK112SM31TR 3.1V LK112SM33TR 3.3V (1) LK112SM34TR 3.4V (1) LK112SM35TR 3.5V ...

Page 16

Revision history Table 7. Document revision history Date Revision 31-Aug-2004 3 31-Jan-2005 4 12-Jun-2006 5 17-Oct-2006 6 20-Jul-2007 7 21-Sep-2007 8 11-Dec-2007 9 12-Feb-2008 10 10-Jul-2008 11 16/17 Changes Mistake on fig. 19. Change maturity code. Order codes updated. ...

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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