Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsLD-1117 V 33 0.8 A Low-drop Voltage Regulator, Positive

LD1117

SERIES

LOW DROP FIXED AND ADJUSTABLE

POSITIVE VOLTAGE REGULATORS

April 1998

BLOCK DIAGRAM

TO-252 (DPAK) TO-220

SO-8SOT-223

■ LOW DROPOUT VOLTAGE (1V TYP)

■ 2.85V DEVICE PERFORMANCES ARE

SUITABLE FOR SCSI-2 ACTIVE

TERMINATION

■ OUTPUT CURRENT UP TO 800mA

■ FIXED OUTPUT VOLTAGE OF: 2.5V, 2.85V,

3.0V, 3.3V, 5.0V

■ ADJUSTABLE VERSION AVAILABILITY

ref

=1.25V)

■ INTERNAL CURRENT AND THERMAL LIMIT

■ AVAILABLEIN ± 1% (AT 25

C) AND 2% IN

ALL TEMPERATURE RANGE

■ SUPPLYVOLTAGE REJECTION : 75 dB (TYP)

■ TEMPERATURE RANGE : 0

C TO 125

DESCRIPTION

The LD1117 is a LOW DROP Voltage Regulator

able to provide up to 800mA of Output Current,

available even in adjustable version

ref

=1.25V). Concerning fixed versions, are

offered the following Output Voltages: 2.5V,

2.85V, 3.0V 3.3V and 5.0V. The 2.85V type is

ideal for SCSI-2 lines active termination. The

device is supplied in: SOT-223, DPAK, SO-8

and TO-220. The SOT-223 and DPAK surface

mount packages optimize the thermal

characteristics even offering a relevant space

saving effect. High efficency is assured by NPN

pass transistor. In fact in this case, unlike than

PNP one, the Quiescent Current flows mostly

into the load. Only a very common 10µF

minimum capacitor is needed for stability. On

chip trimming allows the regulator to reach a

very tight output voltage tolerance, within ± 1%

at 25

C. The ADJUSTABLE LD1117 is pin to

pin compatible with the other standard

Adjustable voltage regulators maintaining the

better performances in terms of Drop and

Tolerance.

1/17

Summary of content (17 pages)

PAGE 1
LD1117 SERIES LOW DROP FIXED AND ADJUSTABLE POSITIVE VOLTAGE REGULATORS ■ ■ ■ ■ ■ ■ ■ ■ ■ LOW DROPOUT VOLTAGE (1V TYP) 2.85V DEVICE PERFORMANCES ARE SUITABLE FOR SCSI-2 ACTIVE TERMINATION OUTPUT CURRENT UP TO 800mA FIXED OUTPUT VOLTAGE OF: 2.5V, 2.85V, 3.0V, 3.3V, 5.0V ADJUSTABLE VERSION AVAILABILITY (Vref=1.
PAGE 2
LD1117 SERIES ABSOLUTE MAXIMUM RATINGS Symbol Value Unit VI N DC Input Voltage Parameter 15 V P tot Power Dissipation 12 T s tg Storage Temperature Range T op Operating Junction Temperature Range W -40 to 150 o C 0 to 125 o C Absolute Maximum Ratings are those value beyond which damage to the device may occur. Functional operation under these condition is not implied. Over the above suggested Max Power Dissipation a Short Circuit could definetively damage the device.
PAGE 3
LD1117 SERIES CONNECTION DIAGRAM AND ORDERING NUMBERS (top view) SOT-223 SOT-223 SO-8 DPAK TO-220 SO-8 DPAK TO-220 LD1117S25 LD1117S25C LD1117S28 LD1117S30 LD1117S30C LD1117S33 LD1117S33C LD1117S50 LD1117S50C LD1117D25 LD1117D25C LD1117D28 LD1117D30 LD1117D30C LD1117D33 LD1117D33C LD1117D50 LD1117D50C LD1117DT25 LD1117DT25C LD1117DT28 LD1117DT30 LD1117DT30C LD1117DT33 LD1117DT33C LD1117DT50 LD1117DT50C LD1117V25 LD1117V25C LD1117V28 LD1117V30 LD1117V30C LD1117V33 LD1117V33C LD1117V50 LD1117V50C
PAGE 4
LD1117 SERIES ELECTRICAL CHARACTERISTICS FOR LD1117#25 (refer to the test circuits, Tj = 0 to 125 oC, Co = 10 µF unless otherwise specified) Symbol Parameter Vo Output Voltage Test Conditions o Vin = 4.5 V Io = 10 mA Tj = 25 C Min. Typ. Max. Unit 2.475 2.5 2.525 V Vo Output Voltage Io = 0 to 800 mA Vin = 3.9 to 10 V 2.55 V ∆V o Line Regulation Vin = 3.9 to 10 V Io = 0 mA 1 6 mV ∆V o Load Regulation Vin = 3.
PAGE 5
LD1117 SERIES ELECTRICAL CHARACTERISTICS FOR LD1117#30 (refer to the test circuits, Tj = 0 to 125 oC, Co = 10 µF unless otherwise specified) Symbol Parameter Vo Output Voltage Test Conditions Vin = 5 V o Io = 10 mA Tj = 25 C Min. Typ. Max. Unit 2.97 3 3.03 V Vo Output Voltage Io = 0 to 800 mA Vin = 4.5 to 10 V 3.06 V ∆V o Line Regulation Vin = 4.5 to 12 V Io = 0 mA 1 6 mV ∆V o Load Regulation Vin = 4.
PAGE 6
LD1117 SERIES ELECTRICAL CHARACTERISTICS FOR LD1117#50 (refer to the test circuits, Tj = 0 to 125 oC, Co = 10 µF unless otherwise specified) Symbol Parameter Vo Output Voltage Test Conditions Vin = 7 V o Io = 10 mA Tj = 25 C Min. Typ. Max. Unit 4.95 5 5.05 V Vo Output Voltage Io = 0 to 800 mA Vin = 6.5 to 15 V 5.1 V ∆V o Line Regulation Vin = 6.5 to 15 V Io = 0 mA 1 10 mV ∆V o Load Regulation Vin = 6.
PAGE 7
LD1117 SERIES ELECTRICAL CHARACTERISTICS FOR LD1117#25C (refer to the test circuits, Tj = 0 to 125 oC, Co = 10 µF unless otherwise specified) Symbol Parameter Vo Output Voltage Test Conditions o Vin = 4.5 V Io = 10 mA Tj = 25 C Min. Typ. Max. Unit 2.45 2.5 2.55 V Vo Output Voltage Io = 0 to 800 mA Vin = 3.9 to 10 V 2.6 V ∆V o Line Regulation Vin = 3.9 to 10 V Io = 0 mA 1 30 mV ∆V o Load Regulation Vin = 3.
PAGE 8
LD1117 SERIES ELECTRICAL CHARACTERISTICS FOR LD1117#33C (refer to the test circuits, Tj = 0 to 125 oC, Co = 10 µF unless otherwise specified) Symbol Parameter Vo Output Voltage Min. Typ. Max. Unit Vin = 5.3 V Io = 10 mA Tj = 25 C Test Conditions 3.24 3.3 3.36 V 3.16 o Vo Output Voltage Io = 0 to 800 mA Vin = 4.75 to 10 V 3.44 V ∆V o Line Regulation Vin = 4.75 to 15 V Io = 0 mA 1 30 mV ∆V o Load Regulation Vin = 4.
PAGE 9
LD1117 SERIES TYPICAL APPLICATIONS: FIGURE 1: Negative Supply FIGURE 2: Active Terminator for SCSI-2 BUS FIGURE 3: Circuit for Increasing Output Voltage 9/17
PAGE 10
LD1117 SERIES TYPICAL APPLICATIONS (continued): FIGURE 4: Voltage Regulator With Reference FIGURE 5: Battery Backed-up Regulated Supply 10/17
PAGE 11
LD1117 SERIES TYPICAL APPLICATIONS (continued): FIGURE 6: Post-Regulated Dual Supply 11/17
PAGE 12
LD1117 SERIES LD1117 ADJUSTABLE: APPLICATION NOTE The LD1117 ADJUSTABLE has a thermal stabilized 1.25±0.012V reference voltage between the OUT and ADJ pins. IADJ is 60µA typ. (120µA max.) and ∆IADJ is 1µA typ. (5µA max.). R1 is normally fixed to 120Ω. From figure 7 we obtain: VOUT = VREF + R2 (IADJ + I R1) = VREF + R2 (IADJ + VREF / R1) = VREF (1 + R2 / R1) + R2 x IADJ .
PAGE 13
LD1117 SERIES SOT-223 MECHANICAL DATA mm DIM. mils MIN. TYP. MAX. MIN. TYP. MAX. a 2.27 2.3 2.33 89.4 90.6 91.7 b 4.57 4.6 4.63 179.9 181.1 182.3 c 0.2 0.4 0.6 7.9 15.7 23.6 d 0.63 0.65 0.67 24.8 25.6 26.4 e1 1.5 1.6 1.7 59.1 63 66.9 e4 0.32 12.6 f 2.9 3 3.1 114.2 118.1 122.1 g 0.67 0.7 0.73 26.4 27.6 28.7 l1 6.7 7 7.3 263.8 275.6 287.4 l2 3.5 3.5 3.7 137.8 137.8 145.7 L 6.3 6.5 6.7 248 255.9 263.
PAGE 14
LD1117 SERIES SO-8 MECHANICAL DATA mm DIM. MIN. TYP. A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.25 a2 MAX. 0.003 0.009 1.65 0.064 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.019 c1 45 (typ.) D 4.8 5.0 0.188 0.196 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4.0 0.14 0.157 L 0.4 1.27 0.015 0.050 M S 0.6 0.023 8 (max.
PAGE 15
LD1117 SERIES TO-252 (DPAK) MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 2.2 2.4 0.086 0.094 A1 0.9 1.1 0.035 0.043 A2 0.03 0.23 0.001 0.009 B 0.64 0.9 0.025 0.035 B2 5.2 5.4 0.204 0.212 C 0.45 0.6 0.017 0.023 C2 0.48 0.6 0.019 0.023 D 6 6.2 0.236 0.244 E 6.4 6.6 0.252 0.260 G 4.4 4.6 0.173 0.181 H 9.35 10.1 0.368 0.397 L2 0.8 L4 0.031 0.6 1 0.023 0.
PAGE 16
LD1117 SERIES TO-220 MECHANICAL DATA mm DIM. MIN. inch TYP. MAX. MIN. TYP. MAX. A 4.40 4.60 0.173 0.181 C 1.23 1.32 0.048 0.051 D 2.40 2.72 0.094 D1 0.107 1.27 0.050 E 0.49 0.70 0.019 0.027 F 0.61 0.88 0.024 0.034 F1 1.14 1.70 0.044 0.067 F2 1.14 1.70 0.044 0.067 G 4.95 5.15 0.194 0.203 G1 2.4 2.7 0.094 0.106 H2 10.0 10.40 0.393 0.409 14.0 0.511 0.551 L2 16.4 L4 0.645 13.0 2.65 2.95 0.104 0.116 L6 15.25 15.75 0.600 0.620 L7 6.
PAGE 17
LD1117 SERIES Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice.