Datasheet RC1117 Datasheet (Fairchild Semiconductor)

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RC1117

1A Adjustable/Fixed Low Dropout Linear Regulator

Features

• Low dropout voltage

• Load regulation: 0.05% typical

• Trimmed current limit

• On-chip thermal limiting

• Standard SOT-223, TO-263, and TO-252 packages

• Three-terminal adjustable or ﬁxed 2.5V, 2.85V, 3.3V, 5V

Applications

• Active SCSI terminators

• High efﬁciency linear regulators

• Post regulators for switching supplies

• Battery chargers

• 5V to 3.3V linear regulators

• Motherboard clock supplies

Typical Applications

Description

The RC1117 and RC1117-2.5, -2.85, -3.3 and -5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed speciﬁcally to be used in Active Terminators for SCSI bus.

Current limit is trimmed to ensure speciﬁed output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures.

Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the RC1117 ﬂows into the load, increasing efﬁciency.

The RC1117 series regulators are available in the industrystandard SOT-223, TO-263 (D2PAK), and TO-252 (DPAK) power packages.

V

= 3.3V V

IN

V

10µF22µF

= V

OUT

REF

= 5V V

IN

+

(1 + R2/R1) + I

10µF

RC1117

ADJ

GND

V

OUT

R1 124Ω

R2

24.9Ω

V

OUT

22µF

IN

• R2

Adj

RC1117-2.85

++

IN

+

2.85V at 1A

1.5V at 1A

REV. 1.3.1 11/18/02

°

PRODUCT SPECIFICATION RC1117

Pin Assignments

Tab is

V

1

ADJ/ GND

Θ

= 3°C/W*

JC

OUT

2 3

INOUT

Front View

Tab is

V

OUT

4-Lead Plastic SOT-223

Θ

= 15°C/W*

JC

3

2

1

IN

OUT

ADJ/GND

Tab is

V

OUT

1

23

ADJ/ GND

3-Lead Plastic TO-252

ΘJC = 3°C/W*

IN

3-Lead Plastic TO-263

*With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane., Θ 30°C/W to more than 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W.

Absolute Maximum Ratings

Parameter Min. Max. Unit

V

IN

Operating Junction Temperature Range 0 125

Storage Temperature Range -65 150

Lead Temperature (Soldering, 10 sec.) 300

7.5 V

can vary from

JA

C

2

REV. 1.3.1 11/18/02

≤

) ≤

≤ 1A •

≤

≤ 1A •

∆

•

µ

) ≤

≤ 1A •

µ

) ≤

•

RC1117 PRODUCT SPECIFICATION

Electrical Characteristics

Operating Conditions: V The • denotes speciﬁcations which apply over the speciﬁed operating temperature range.

Parameter Conditions Min. Typ. Max. Units

Reference Voltage, V

Output Voltage 10mA ≤ I

Line Regulation

Load Regulation

1,2

Dropout Voltage

Current Limit (V

Adjust Pin Current, I

Adjust Pin Current Change

Minimum Load Current 1.5V ≤ (V

Quiescent Current V

Ripple Rejection f = 120Hz, C

Thermal Regulation T

Temperature Stability

Long-Term Stability T

RMS Output Noise (% of V

OUT

)

Thermal Resistance, Junction to Case

Thermal Shutdown Junction Temperature 155

Thermal Shutdown Hysteresis

Notes:

1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing.

2. Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/ output voltage range.

3. RC1117 only.

Adj

IN

REF

3

7V, T

= 25°C unless otherwise speciﬁed.

J

3

1.5V ≤ (V 10mA ≤ I

RC1117-2.5, 4V ≤ V RC1117-2.85, 4.35V ≤ V RC1117-3.3, 4.8V ≤ V RC1117-5, 6.5V ≤ V

(V

OUT

(V

– V

IN

V

REF

– V

IN

3

1.5V ≤ (V 10mA ≤ I

= V

IN

(V

– V

IN

= 25 ° C, 30ms pulse 0.004 0.02 %/W

A

= 125 ° C, 1000hrs. 0.03 1.0 %

A

T

= 25 ° C, 10Hz ≤ f ≤ 10kHz 0.003 %

A

- V

IN

OUT

1A

OUT

+ 1.5V) ≤ V

) = 2V, 10mA ≤ I

OUT

= 1%, I

OUT

IN

OUT

IN

OUT

) = 2V

– V

OUT

– V

OUT

+ 1.25V

OUT

) = 3V, I

5.75V,

7V

IN

7V

7V, I

7V

= 10mA •

OUT

= 1A

5.75,

5.75

= 22 µ F Tantalum,

= 1A

OUT

•

SOT-223 15

TO-252, TO-263 3

1.225 (-2%)

2.450

2.793

3.234

4.900

1.250 1.275 (+2%)

2.5

2.85

3.3

5.0

2.550

2.907

3.366

5.100

0.005 0.2 %

0.05 0.5 %

1.100 1.200 V

1.1 1.5 A

35 120

0.2 5

10 mA

413mA

60 72 dB

0.5 %

10

V

V V V V

A

C/W

C

°

REV. 1.3.1 11/18/02

3

PRODUCT SPECIFICATION RC1117

Typical Performance Characteristics

1.5 0.10

1.4

1.3

1.2

1.1 TJ = 0°C

TJ = 25°C

OUTPUT CURRENT (A) JUNCTION TEMPERATURE (°C)

TJ = 125°C

DROPOUT VOLTAGE DEVIATION (%)

1.0 -75 -50 -25 0 25 50 75 100 125 150 175

DROPOUT VOLTAGE (V)

1.0

0.9

0.8

0.7

0.6

0.5

0

0 0.6 0.80.40.2

∆I = 1A

0.05

0

-0.05

-0.10

-0.15

-0.20

Figure 1. Dropout Voltage vs. Output Current Figure 2. Load Regulation vs. Temperature

REFERENCE VOLTAGE (V)

3.70

3.65

3.60

3.55

3.50

3.45

3.40

3.35

3.30

3.25

3.20

V

SET WITH 1% RESISTORS

OUT

V

OUT

V

OUT

Note:

1. RC1117 Only

= 3.6V

= 3.3V

1

1.250

1.245

1.240

1.235

1.230

1.225

1.220

1.215

1.210

REFERENCE VOLTAGE (V)

1.205

1.200

-75 -50 -25 0 25 50 75 100 125 150 175 -75 -50 -25 0 25 50 75 100 125 150 175

JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C)

Figure 3. Reference Voltage vs. Temperature Figure 4. Output Voltage vs. Temperature

5

4

3

2

1

MINIMUM LOAD CURRENT (mA)

0

-75 -50 -25 0 25 50 75 100 125 150 175

JUNCTION TEMPERATURE (°C)

100

90

80

70

60

50

40

30

20

ADJUST PIN CURRENT (µA)

10

0

-75 -50 -25 0 25 50 75 100 125 150 175

JUNCTION TEMPERATURE (°C)

Note:

1. RC1117 Only

Figure 5. Minimum Load Current vs. Temperature Figure 6. Adjust Pin Current vs. Temperature

4

REV. 1.3.1 11/18/02

RC1117 PRODUCT SPECIFICATION

Typical Performance Characteristics (continued)

2.0

1.75

1.5

1.25

SHORT-CIRCUIT CURRENT (A)

1.0

-75 -50 -25 0 25 50 75 100 125 150 175

JUNCTION TEMPERATURE (°C)

90

80

70

60

50

40

30

RIPPLE REJECTION (dB)

0.5 < V

10

I

OUT

0

10 100 1K 10K 100K

(VIN - V

20

) = 3V

OUT

< 2V

RIPPLE

= 1A

FREQUENCY (Hz)

Figure 7. Short-Circuit Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency

10

7.5

5

TO-252 & TO-263

POWER (W)

2.5

0

25 45 65 85 105 125

SOT-223

CASE TEMPERATURE (°C)

Figure 9. Maximum Power Dissipation

REV. 1.3.1 11/18/02 5

PRODUCT SPECIFICATION RC1117

Mechanical Dimensions

4-Lead SOT-223 Package

Symbol

A — .071

A1 — .181

B .025

c — .090 D .248 .264

E .130 .148

e F H .264 .287

I

J

K

M

E

H

Inches

Min. Max. Min. Max.

.033

.115 .124 .033 .041

.012 — .310 —

— 10°

10° 16°

.0008 .0040L.0203 .1018

10° 16°

.010 .014N.250 .360

— 1.80

— 4.80

.640

— 2.29

6.30 6.71

3.30 3.71

2.95 3.15 .840 1.04

6.71 7.29

— 10°

10° 16°

D

e

Millimeters

.840

A

Notes

K

J

B

I

L

M

N

A1

c

F

6 REV. 1.3.1 11/18/02

RC1117 PRODUCT SPECIFICATION

Mechanical Dimensions

3-Lead TO-252 Package

D

C

(0.59)

0.89

0.54

MM

0.25 A C

SEE

NOTE D

6.73

6.35

5.46

5.21

2

1

4.57

E1

A

6.00 MIN

L3

1.02

0.84

3

1.14

0.78

2.29

6.25

1

1.40 MIN

4

6.50 MIN

3.00 MIN

3

2.30

4.80

LAND PATTERN RECOMMENDATION

B

2.38

2.18

4

D1

0.58

0.48

10°

0°

GAGE PLANE

0.61

0.48

1.78

1.40

3

2.90

DETAIL A

(ROTATED –90°

SCALE 12X

2

1

0.127 MAX

SEATING PLANE

0.51

(1.54)

10.41

DETAIL A

0.10 B

NOTES: UNLESS OTHERWISE SPECIFIED

A) ALL DIMENSIONS ARE IN MILLIMETERS. B) THIS PACKAGE CONFORMS TO JEDEC, TO-252,

ISSUE C. VARIATION AA & AB, DATED NOV. 1999.

C) DIMENSIONING AND TOLERANCING PER

ASME Y14.5–1994.

D) HEAT SINK TOP EDGE COULD BE IN CHAMFERED

CORNERS OR EDGE PROTRUSION.

E) DIMENSIONS L3, D, E1 & D1 TABLE:

OPTION AA OPTION AB

0.89 – 1.27 1.52 – 2.03

L3

5.97 – 6.22 5.33 – 5.59

D

4.32 MIN 3.81 MIN

E1

5.21 MIN

D1 4.57 MIN

9.40SEE

REV. 1.3.1 11/18/02 7

PRODUCT SPECIFICATION RC1117

Mechanical Dimensions

3-Lead TO-263 Package

Symbol

A .160 .190 4.06 4.83

b .020 .036 0.51 0.91 b2 c2

D E e

L .575 .625 14.61 15.88 L1 L2 R

α

Inches

Min. Max. Min. Max.

.049 .051 1.25 1.30 .045 .055 1.14 1.40

.340 .380 8.64 9.65 .380 .405 9.65 10.29

.100 BSC

.090

.017 .019 0.43 0.78

.110

— .055 — 1.40

0° 8° 0° 8°

@PKG/

@HEATSINK

Millimeters

2.54 BSC

2.29 2.79

E

Notes

L2

Notes:

1. Dimensions are exclusive of mold flash and metal burrs.

2. Standoff-height is measured from lead tip with ref. to Datum -B-.

3. Foot length is measured with ref. to Datum -A- with lead surface (at inner R).

4. Dimensiuon exclusive of dambar protrusion or intrusion.

5. Formed leads to be planar with respect to one another at seating place -C-.

c2

D

L

E-PIN

b2

b

e

A

-C-

R (2 PLCS)

L1

-A--B-

8 REV. 1.3.1 11/18/02

PRODUCT SPECIFICATION RC1117

Ordering Information

Product Number Output Package

RC1117DX Adjustable TO-252 in tape and reel

RC1117M Adjustable TO-263

RC1117MT Adjustable TO-263 in tape and reel

RC1117ST Adjustable SOT-223 in tape and reel

RC1117D25X 2.5 volt TO-252 in tape and reel

RC1117M25 2.5 volt TO-263

RC1117M25T 2.5 volt TO-263 in tape and reel

RC1117S25T 2.5 volt SOT-223 in tape and reel

RC1117M285 2.85 volt TO-263

RC1117M285T 2.85 volt TO-263 in tape and reel

RC1117S285T 2.85 volt SOT-223 in tape and reel

RC1117D33X 3.3 volt TO-252 in tape and reel

RC1117M33 3.3 volt TO-263

RC1117M33T 3.3 volt TO-263 in tape and reel

RC1117S33T 3.3 volt SOT-223 in tape and reel

RC1117D5X 5 volt TO-252 in tape and reel

RC1117M5 5 volt TO-263

RC1117M5T 5 volt TO-263 in tape and reel

RC1117S5T 5 volt SOT-223 in tape and reel

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11/18/02 0.0m 005

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