LK112SM14TR资料

LK112SSERIES

LOW NOISE LOW DROP VOLTAGE REGULATOR

WITH SHUTDOWN FUNCTION

s s

s

s

sss

OUTPUT CURRENT UP TO 200mA

LOW DROPOUT VOLTAGE (500mV MAX AT IOUT=200mA)

VERY LOW QUIESCENT CURRENT: 0.1µA IN OFF MODE AND MAX 250µA IN ON MODE AT IOUT=0mA

LOW OUTPUT NOISE: TYP 30µV AT IOUT=60mA AND 10HzWIDE RANGE OF OUTPUT VOLTAGES

INTERNAL CURRENT AND THERMAL LIMITVOUT TOLERANCE ± 2% (AT 25°C)

SOT23-5LDESCRIPTION

The LK112S is a low dropout linear regulator witha built in electronic switch. The internal switch canbe controlled by TTL or CMOS logic levels. Thedevice is ON state when the control pin is pulled toa logic high level. An external capacitor can beused connected to the noise bypass pin to lowerthe output noise level to 30µVrms. An internal PNPpass transistor is used to achieve a low dropoutvoltage.

The LK112S has a very low quiescent current inON MODE while in OFF MODE the Iq is reduceddown to 100nA max. The internal thermalshutdown circuitry limits the juntion temperature tobelow 150°C. The load current is internallymonitored and the device will shutdown in thepresence of a short circuit or overcurrent conditionat the output.

SCHEMATIC DIAGRAMFebruary 20031/11

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LK112S SERIES

ABSOLUTE MAXIMUM RATINGS

SymbolVIVSHDNIOTstgTop

DC Input VoltageShutdown Input VoltageOutput Current

Storage Temperature Range

Operating Junction Temperature Range

Parameter²

Value1616

Internally limited-55 to +150-30 to +80

°C°CUnitVV

CONNECTION DIAGRAM (top view) PIN DESCRIPTION

Pin N°Symbol1

SHDN

Name and Function

2

SOT23-5L3

45

Shutdown Input: Disables the

regulator when is connected to GND or to positive voltage less than 0.6V

GNDGround Pin: Internally connected to

the die attach flag to decrease the total thermal resistance and increase the package ability to dissipate power.

BypassBypass Pin: Bypass with 0.1µF to

improve the Vref thermal noise performances.

OUTOutput PortINInput Port

ELECTRICAL CHARACTERISTICS FOR LK112 (Tj = 25°C, VIN=VOUT+1V (see Note 1), IOUT=0mA,

VSHDN=1.8V, CI = 1 µF, CO = 2.2µF, CBYPASS = 0.1µF unless otherwise specified)

SymbolIdVO∆VO∆VOVdISCSVReNISHDNVSHDN∆VO/Tj

Parameter

Quiescent CurrentOutput VoltageLine RegulationLoad RegulationDropout VoltageShort Circuit CurrentSupply Voltage RejectionOutput Noise VoltageShutdown Input CurrentShutdown Input LogicOutput Voltage

Temperature Coefficient

CBYP = 0.1µFVI = VO+1.5V

CO = 10µFf = 400Hz IO = 30mAB= 10Hz to 80KHzCBYP = 0.1µFCO = 10µFVI = VO+1.5V,IO = 60mAVSHDN = 1.8VOutput ONOutput OFFIO = 10mA

Output ON

1.8

0.6

0.09

Test Conditions

ON MODE (except ISHDN)OFF MODEVI = 8VIO = 30mA

VI = VO+1V to VO+6V,VI = VO+1V to VO+6V,IO = 1 to 60mAIO = 1 to 200mAIO = 60 mA (see Note 2)IO = 200 mA (see Note 2)

200

553012

35

VSHDN = 0VVO ≤ 5.6VVO > 5.6V

Min.

Typ.1750(see table)

0.70.815300.170.35

204030900.240.5

mVmVmVmVVVmAdBµVrmsµAVVmV/°C

Max.2500.1

UnitµAµA

Note 1: for version with output voltage less than 2V VIN=2.4VNote 2: only for version with output voltage more than 2.1V

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LK112S SERIES

ORDERING NUMBERS AND OUTPUT VOLTAGE

Part NumberLK112SM13TRLK112SM14TR (*)LK112SM15TRLK112SM16TRLK112SM17TR (*)LK112SM18TRLK112SM19TR (*)LK112SM20TR (*)LK112SM21TRLK112SM22TR (*)LK112SM23TR (*)LK112SM24TR (*)LK112SM25TRLK112SM26TR (*)LK112SM27TR (*)LK112SM28TRLK112SM29TR (*)LK112SM30TRLK112SM31TR (*)LK112SM32TRLK112SM33TRLK112SM34TR (*)LK112SM35TR (*)LK112SM36TRLK112SM37TR (*)LK112SM38TRLK112SM39TR (*)LK112SM40TRLK112SM41TR (*)LK112SM42TR (*)LK112SM43TR (*)LK112SM44TR (*)LK112SM45TR (*)LK112SM46TR (*)LK112SM47TRLK112SM48TR (*)LK112SM49TR (*)LK112SM50TRLK112SM55TR (*)LK112M60TRLK112SM80TR

(*) Available on request

Output Voltage

1.3V1.4V1.5V1.6V1.7V1.8V1.9V2.0V2.1V2.2V2.3V2.4V2.5V2.6V2.7V2.8V2.9V3.0V3.1V3.2V3.3V3.4V3.5V3.6V3.7V3.8V3.9V4.0V4.1V4.2V4.3V4.4V4.5V4.6V4.7V4.8V4.9V5.0V5.5V6.0V8.0V

VOUT Min1.24V1.34V1.44V1.54V1.64V1.74V1.84V1.94V2.04V2.14V2.24V2.34V2.44V2.54V2.64V2.74V2.84V2.94V3.04V3.14V3.24V3.335V3.435V3.535V3.630V3.725V3.825V3.920V4.020V4.120V4.215V4.315V4.410V4.510V4.605V4.705V4.800V4.900V5.390V5.880V7.840V

VOUT Max1.36V1.46V1.56V1.66V1.76V1.86V1.96V2.06V2.16V2.26V2.36V2.46V2.56V2.66V2.76V2.86V2.96V3.06V3.16V3.26V3.36V3.465V3.565V3.655V3.770V3.875V3.975V4.080V4.180V4.280V4.385V4.485V4.590V4.690V4.795V4.895V5.000V5.100V5.610V6.120V8.160V

Test Voltage

2.4V2.4V2.4V2.4V2.4V2.4V2.4V3.0V3.1V3.2V3.3V3.4V3.5V3.6V3.7V3.8V3.9V4.0V4.1V4.2V4.3V4.4V4.5V4.6V4.7V4.8V4.9V5.0V5.1V5.2V5.3V5.4V5.5V5.6V5.7V5.8V5.9V6.0V6.5V7.0V9.0V

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LK112S SERIES

TYPICAL CHARACTERISTICS (unless otherwise specified Tj = 25°C, CI=1µF, CO=2.2µF, CBYP=100nF)Figure 1 : Output Voltage vs Temperature

Figure 4 : Load Regulation vs Temperature

Figure 2 : Output Voltage vs Temperature Figure 5 : Dropout Voltage vs Temperature

Figure 3 : Line Regulation vs Temperature Figure 6 : Short Circuit Currennt vs Dropout Voltage

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LK112S SERIES

Figure 7 : Output Voltage vs Input Voltage

Figure 10 : Supply Voltage Rejection vs Temperature

Figure 8 : Shutdown Voltage vs Temperature Figure 11 : Supply Voltage Rejection vs Output Current

Figure 9 : Shutdown Current vs Shutdown Voltage Figure 12 : Supply Voltage Rejection vs Frequency

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LK112S SERIES

Figure 13 : Supply Voltage Rejection vs Temperature

Figure 16 : Quiescent Current vs Shutdown Voltage Figure 14 : Quiescent Current vs Temperature Figure 17 : Quiescent Current vs Output Current

Figure 15 : Quiescent Current vs Input Voltage Figure 18 : Reverse Current vs Reverse Voltage

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LK112S SERIES

Figure 19 : Stability

Figure 22 : Start-up Transient

VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=68Ω, CI=1µF, CO=4.7µF, CBY=100nF

Figure 20 : Spectrum Noise Figure 23 : Line Transient

VI=3.5 to 4.5V, VO=2.5V, VSHDN=1.8V, IO=30mA, No CI, CO=10µF, CBY=100nF, ts=tf=2µs

Figure 21 : Start-up Transient Figure 24 : Line Transient

VI=3.5V, VO=2.5V, VSHDN= 0 to 1.8V, RL=2.5KΩ, CI=1µF, CO=4.7µF, CBY=10nFVI=3.5 to 4.5V, VO=2.5V, VSHDN=1.8V, IO=30mA, No CI, CO=10µF, CBY=10nF, ts=tf=2µs

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LK112S SERIES

Figure 25 : Line Transient

Figure 27 : Load Transient

VI=3.5 to 4.5V, VO=2.5V, VSHDN=1.8V, IO=30mA, No CI, CO=1µF, CBY=1nF, ts=tf=2µsVI=3.5V, VO=2.5V, VSHDN=1.8V, IO=50 to 100mA, CI1µF, CO=10µF, CBY=100nF, ts=tf=250ns

Figure 26 : Load Transient Figure 28 : Load Transient

VI=3.5 V, VO=2.5V, VSHDN=1.8V, IO=50 to 100mA, CI=1µF, CO=2.2µF, CBY=10nF, ts=tf=250nsVI=4.8 V, VO=3.8V, VSHDN=1.8V, IO=50 to 100mA, CI=1µF, CO=2.2µF, CBY=10nF, ts=tf=250ns

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LK112S SERIESSOT23-5L MECHANICAL DATAmm.DIM.MIN.AA1A2bCDEE1ee1L0.350.900.000.900.350.092.802.601.500.951.9TYPMAX.1.450.151.300.500.203.003.001.75MIN.35.40.035.413.73.5110.2102.359.037.474.8TYP.MAX.57.15.951.219.77.8118.1118.168.8mils 0.5513.721.69/11元器件交易网www.cecb2b.com

LK112S SERIES

Tape & Reel SOT23-xL MECHANICAL DATAmm.DIM.MIN.ACDNTAoBoKoPoP3.133.071.273.93.93.233.171.374.04.012.820.26014.43.333.271.474.14.10.1230.1200.0500.1530.1530.1270.1240.0540.1570.15713.0TYPMAX.18013.20.5040.7952.3620.5670.1310.1280.0.580.1610.1610.512MIN.TYP.MAX.7.0860.519inch10/11

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LK112S SERIES

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for theconsequences of use of such information nor for any infringement of patents or other rights of third parties which may result fromits use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specificationsmentioned in this publication are subject to change without notice. This publication supersedes and replaces all informationpreviously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices orsystems without express written approval of STMicroelectronics.

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