LSP1117D50AG - Lite-On Semiconductor Corp.

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

1/9

 PIN CONFIGURATION

(1) TO252-3L (2) SOT223

 BLOCK DIAGRAM

 FEATURES

 1.4V maximum dropout at full load current

 Fast transient response

 Output current limiting

 Built-in thermal shutdown

 Good noise rejection

 Low ESR Ceramic Capacitor(MLCC) Required for

Stability

 GENERAL DESCRIPTION

The LSP1117 is a series of low dropout three-terminal

regulators with a dropout of 1.4V at 1A output current.

The LSP1117 series provides current limiting and

thermal shutdown. Its circuit includes a trimmed

bandgap reference to assure output voltage accurac

y

to be within 2% for 1.2V, 1.5V, 1.8V, 2.5V, 3.3.V, 5.0

V

and adjustable versions. Current limit is trimmed to

ensure specified output current and controlled

short-circuit current. On-chip thermal shutdown

provides protection against any combination o

f

overload and ambient temperature that would create

excessive junction temperature.

The LSP1117 has an adjustable version that can

provide the output voltage from 1.2V to 12V with onl

y

two external resistors.

The LSP1117 series is available in the industr

y

standard TO252-3L and SOT223 power packages.

 APPLICATIONS

 PC Motherboard

 LCD Monitor

 Graphic Card

 DVD-video player

 NIC/Switch

 Telecom Equipment

 ADSL Modem

 Printer and other Peripheral Equipment

1

2

3

ADJ/GND

VOUT

VIN

Metal Tab VOUT

2

1

3

ADJ/GND

VOUT

VIN

Metal Tab VOUT

For Fixed Output,connect A1 and A2, disconnect B

A2

OUTPUT

Protection

-

+

ADJ/GND

INPUT

For Adjustable Output, disconnect A1 and A2, connect B

2

B

1

3

Thermal

A1

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

2/9

 ABSOLUTE MAXIMUM RATINGS (NOTE 1)

Symbol Parameter Rating Unit

VIN Input Voltage 23 V

TJ Maximum Junction Temperature 150

℃

TS Storage Temperature -65~150

℃

TLEAD Lead Temperature (10 sec.) 300 ℃

Note 1: Stresses greater than those listed under“Absolute Maximum Ratings” may cause permanent damage to the

device. These are stress rating only, and functional operation of the device at these or any other conditions beyond

those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum

Ratings” for extended periods may affect device reliability.

 RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Rating Unit

VIN Input Voltage 20 V

TJ Operating Junction Temperature Range -20~125 ℃

 ELECTRICAL CHARACTERISTICS

Operating Conditions: VIN≤10V, TJ=25 , unless otherwise specified℃

Parameter Symbol Test Condition Min. Typ. Max. Unit

IO=10mA, VIN-VOUT=1.5V 1.225 1.250 1.275

Reference

Voltage VREF LSP1117 -Adj IO=10mA,1.5V≤VIN-VOUT≤8V 1.225 1.250 1.275 V

IO=10mA, VIN=3V 1.188 1.2 1.212

LSP1117-1.2 IO=10mA, 3V≤VIN≤10V 1.176 1.2 1.224 V

IO=10mA, VIN=3V 1.485 1.5 1.515

LSP1117 -1.5 IO=10mA, 3V≤VIN≤10V 1.470 1.5 1.530 V

IO=10mA, VIN=3.3V 1.782 1.8 1.818

LSP1117 -1.8 IO=10mA, 3.3V≤VIN≤10V 1.764 1.8 1.836 V

IO=10mA, VIN=4V 2.475 2.5 2.525

LSP1117 -2.5 IO=10mA, 4V≤VIN≤10V 2.450 2.5 2.550 V

IO=10mA, VIN=4.8V 3.267 3.3 3.333

LSP1117 -3.3 IO=10mA, 4.8V≤VIN≤10V 3.235 3.3 3.365 V

IO=10mA, VIN=6.5V 4.950 5.0 5.050

Output Voltage VOUT

LSP1117 -5.0 IO=10mA, 6.5V≤VIN≤12V 4.900 5.0 5.100 V

IO=10mA,1.5V≤VIN-VOUT≤7V 0.1 0.3

Line Regulation RegLINE LSP1117-XXX IO=10mA,1.5V≤VIN-VOUT≤10V 0.1 0.5

%

LSP1117 -Adj VIN= 3V, 10mA<Io<1A 1 %

LSP1117 –1.2 VIN= 3V, 10mA<Io<1A 10 12 mV

LSP1117 -1.5 VIN= 3V, 10mA<Io<1A 12 15 mV

LSP1117 -1.8 VIN= 3.3V, 10mA<Io<1A 15 18 mV

LSP1117 -2.5 VIN= 4V, 10mA<Io<1A 20 25 mV

LSP1117 -3.3 VIN= 5V, 10mA<Io<1A 26 33 mV

Load Regulation RegLoad

LSP1117 -5.0 VIN= 6.5V, 10mA<Io<1A 40 50 mV

Dropout Voltage VIN- VOUT LSP1117-XXX IOUT = 1A ,∆VOUT=1%VOUT 1.3 1.4 V

Current Limit ILIMT LSP1117-XXX VIN-VOUT=3V 1.1 A

Ripple Rejection LSP1117-XXX F=120Hz,COUT=25uF

Tantalum, VIN-VOUT=3V 60 70 dB

Temperature

Stability LSP1117-XXX IO=10mA 0.5 %

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

3/9

 ELECTRICAL CHARACTERISTICS (CONTINUED)

Operating Conditions: VIN≤10V, TJ=25 , unless otherwise specified℃

Parameter Symbol Test Condition Min. Typ. Max. Unit

Adjust Pin Current IO=10mA~1A, 1.5V≤VIN-VOUT≤10V 60 120 µA

Adjust Pin Current Change IO=10mA~1A, 1.4V≤VIN-VOUT≤10V 0.2 5 µA

Minimum Load Current LSP1117-Adj 1.5V≤VIN-VOUT≤10V 5 10 mA

Quiescent Current Iq VIN=VOUT+1.25V 5 10 mA

Power Ratio Ripple Rejection PSRR F = 100Hz, IOUT = 1A 60 70 dB

Long-term Stability TA=125℃, 1000hrs 0.3 %

RMS Output Noise

(% of VOUT) T

A=25℃, 10Hz≤f≤10kHz 0.003 %

TO252-3L 1.2

Power Dissipation Pd SOT223 0.625

W

TO252-3L 55 Thermal Resistance,

Junction to Ambient θJA SOT223 75

℃/

W

TO252-3L 10 Thermal Resistance,

Junction to case θJC SOT223 15

℃/

W

Thermal Shutdown Junction Temperature 150 ℃

Thermal Shutdown

Hysteresis 25 ℃

 TYPICAL APPLICATIONS

4.7µF

V

IN

V

OUT

LSP1117 - Fixed

GND

V

IN

V

OUT

4.7µF

V

IN

V

OUT

LSP1117 - ADJ

ADJ

V

IN

V

OUT

R

1

R

2

4.7µF 4.7µF

The LSP1117 keeps a constant 1.25V between the output pin and the adjust pin. By placing a resistor R1 across

these two pins a constant current flows through R1, adding to the Iadj current and into the R2 resistor producing a

voltage equal to the (1.25/R1)*R2+Iadj*R2 which will be added to the 1.25V to set the output voltage.

C1

V

IN

V

OUT

LSP1117-ADJ

ADJ

V

IN

V

OUT

R

1

R

2

C2

V

REF

I

ADJ=

60uA

VV

RI

R

VV

REF

ADJREFOUT

25.1

2

1

2

1

=

×+

⎟

⎠

⎞

⎜

⎝

⎛+×=

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

4/9

This is summarized in the above equation. Since the minimum load current requirement of the LSP1117 is 10mA,

R1 is typically selected to be 121Ω resistor so that it automatically satisfies the minimum current requirement. Notice

that since Iadj is typically in the range of 60uA it only adds a small error to the output voltage and should only be

considered when a very precise output voltage setting is required. For example, in a typical 3.3V application where

R1=121Ω and R2=200Ω the error due to Iadj is only 0.3% of the nominal set point. The C1, C2 capacitor are 4.7uF

(Low ESR Ceramic, MLCC), and its ESR should be larger than 15mΩ.

C1

V

IN

V

OUT

LSP1117-ADJ

ADJ

VIN VOUT

R1

R2

C2

VREF

ADJ

REF

REFOUT

ImA

R

V

When

R

VV

>>=

⎟

⎠

⎞

⎜

⎝

⎛+×≅

10

1

2

1

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

5/9

 TYPICAL PERFORMANCE CHARACTERISTICS

0.4 0.6 0.8 1.00.2

0.5

0.6

0.7

0.8

0.9

1.0

1.1

1.2

Output Current (A)

Dropout Voltage (V)

Dropout Voltage vs Output Current

TA=25℃

TA=0℃

TA=125℃

-50 -25 0 25 50 75 100 125

1.235

1.240

1.245

1.250

1.255

1.260

1.270

1.275

1.280

Junction Temperature (℃)

Reference Voltage (V)

Reference Voltage vs Junction Temperature

1.265

Junction Temperature (℃)

-25 0 25 50 75 100 125

0

2

4

5

Minimum Load Current (mA)

Minimum Load Current vs Junction Temperature

-50

1

3

-50 -25 0 25 50 75 100 125

0

10

20

30

40

50

70

80

90

Junction Temperature (℃)

Adjust Pin Current (µA)

Adjust Pin Current vs Junction Temperature

60

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

6/9

 TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED)

Line Transient Response Load Transient Response

Junction Temperature (℃)

-25 0 25 50 75 100 125

1.0

1.4

1.8

2.0

Short-Circuit Current (A)

Short-Circuit Current vs Junction Temperature

-50

1.2

1.6

50 75 100 12525

0.0

2.5

5.0

7.5

10.0

Case Temperature (℃

Power (W)

Maximum Power Dissipation

SOT223

Frequency (Hz)

Ripple Rejection (dB)

20

30

40

50

60

70

10 100 1k 10k 100k

Ripple Rejection vs Frequency

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

7/9

 ORDERING INFORMATION

Tape & Reel

Device Package Code Package Quantity Part Number

Suffix

Temperature

LSP1117EXXAG E SOT223-3L 2500 A G : -20°C~125°C

LSP1117DXXAG D TO252-3L 2500 A G : -20°C~125°C

 MARKING INFORMATION

(1) TO252-3L (2) SOT223

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

8/9

PACKAGE INFORMATION

(1) TO252-3L

Notes:

1. JEDEC Outline:TO-252 AB

2. Mils suggested for positive contact at mounting

Dimensions In Millimeters Dimensions In Inches

Symbol Min. Nom. Max. Min. Nom. Max.

A 2.18 2.29 2.39 0.086 0.090 0.094

b 0.635 - 0.889 0.025. - 0.035

b2 4.953 - 5.461 0.195 - 0.215

C 0.52 BSC 0.020 BSC

C1 0.46 0.52 0.89 0.018 0.020 0.035

D 5.33 5.46 5.59 0.210 0.215 0.220

E 6.35 6.58 6.73 0.250 0.259 0.265

e 2.29 BSC. 0.09 BSC.

e1 4.58 BSC. 0.18 BSC.

H 9.4 9.70 10.25 0.37 0.382 0.41

L 1.4 1.52 1.78 0.055 0.06 0.07

L1 0.64 0.83 1.02 0.025 0.033 0.040

L2 1.52 1.78 2.03 0.060 0.070 0.080

b2

E

be

e1

DL2L1

11.0

2.0

7.2

5.6

2.25

1.2

5.6

Land Pattern Recommendation (Unit : mm)

H

L

C

A

SEATING PLANE

C 1

SEE NOTE2

Liteon Semiconductor Corporation

LSP1117

1A Low Dropout Linear Regulator

Rev1.5

9/9

(2) SOT223

Dimensions In Millimeters Dimensions In Inches

Symbol Min. Nom. Max. Min. Nom. Max.

A 1.50 1.65 1.80 0.059 0.065 0.071

A1 0.02 0.06 0.1 0.001 0.002 0.004

B 0.66 0.76 0.84 0.026 0.03 0.033

B1 2.90 3.0 3.1 (Ref.) 0.114 0.118 0.122(Ref.)

C 0.23 0.30 0.35 0.009 0.012 0.014

D 6.30 6.50 6.70 0.248 0.256 0.264

E 3.30 3.50 3.70 0.130 0.138 0.146

e 2.3Basic 0.091Basic

e1 4.6Basic 0.181Basic

H 6.70 7.00 7.30 0.264 0.276 0.287

L 0.75 0.03

K 1.50 1.75 2.00 0.059 0.069 0.079

α 0

ο 5ο 10ο 0ο 5ο 10ο

e

KE

H

B1

D

e1

3.3

1.6

6.4

1.6

1.2

2.3

Land Pattern Recommendation (Unit :mm)

B

ß

LC

A

1

Seating Plane

α