RC1117 Fairchild Semiconductor, RC1117 Datasheet

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RC1117

Manufacturer Part Number
RC1117
Description
1A Adjustable/Fixed Low Dropout Linear Regulator
Manufacturer
Fairchild Semiconductor
Datasheets

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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
RC1117
1A Adjustable/Fixed Low Dropout Linear Regulator
V
IN
V
V
= 3.3V
OUT
IN
= 5V
= V
REF
10 F
10 F
(1 + R2/R1) + I
+
+
Adj
V
• R2
IN
V
IN
RC1117-2.85
RC1117
ADJ
GND
V
OUT
V
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 industry-
standard SOT-223, TO-263 (D2PAK), and TO-252 (DPAK)
power packages.
OUT
R1
124
R2
24.9
+
22 F
+
2.85V at 1A
22 F
www.fairchildsemi.com
1.5V at 1A
REV. 1.3.1 11/18/02

Related parts for RC1117

RC1117 Summary of contents

Page 1

... 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 specifi ...

Page 2

... Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 2 Tab is V OUT IN OUT ADJ/GND ADJ/ IN GND 3-Lead Plastic TO-252 = 3 C/W* JC Min. 0 -65 RC1117 Tab is V OUT ADJ/ OUT IN GND 3-Lead Plastic TO-263 = 3 C/W* JC can vary from JA Max. Unit 7.5 V 125 C ...

Page 3

... 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. REV. 1.3.1 11/18/02 Conditions (V ...

Page 4

... Figure 6. Adjust Pin Current vs. Temperature RC1117 100 125 150 175 JUNCTION TEMPERATURE ( C) V SET WITH 1% RESISTORS OUT 3.6V OUT V = 3.3V OUT Note: 1. RC1117 Only 100 125 150 175 JUNCTION TEMPERATURE ( C) Note: 1. RC1117 Only 100 125 150 175 JUNCTION TEMPERATURE ( C) REV. 1.3.1 11/18/02 ...

Page 5

... RC1117 Typical Performance Characteristics 2.0 1.75 1.5 1.25 1.0 -75 -50 - 100 125 150 175 JUNCTION TEMPERATURE ( C) Figure 7. Short-Circuit Current vs. Temperature REV. 1.3.1 11/18/02 (continued Figure 8. Ripple Rejection vs. Frequency 10 7.5 TO-252 & TO-263 5 SOT-223 2 105 CASE TEMPERATURE ( C) Figure 9. Maximum Power Dissipation ...

Page 6

... E .130 .148 3.30 e .115 .124 2.95 F .033 .041 .840 H .264 .287 6.71 I .012 — .310 — 10 — .0008 .0040 .0203 .010 .014 .250 Notes Max. 1.80 4.80 .840 2.29 6.71 3.71 3.15 1.04 7.29 — .1018 16 .360 RC1117 REV. 1.3.1 11/18/02 N ...

Page 7

... RC1117 Mechanical Dimensions 3-Lead TO-252 Package (0.59) 0.89 0.54 0. SEE NOTE D 3 GAGE PLANE 0.61 0. 1.78 1.40 2.90 DETAIL A (ROTATED –90 SCALE 12X REV. 1.3.1 11/18/02 A 6.73 6.35 5.46 5.21 L3 1.02 0. 1.14 0.78 2.29 4.57 LAND PATTERN RECOMMENDATION DETAIL NOTES: UNLESS OTHERWISE SPECIFIED 0.51 A) ALL DIMENSIONS ARE IN MILLIMETERS. B) THIS PACKAGE CONFORMS TO JEDEC, TO-252, ISSUE C. VARIATION AA & ...

Page 8

... Standoff-height is measured from lead tip with ref. to Datum -B-. Max. 3. Foot length is measured with ref. to Datum -A- with lead surface 4.83 (at inner R). 0.91 4. Dimensiuon exclusive of dambar protrusion or intrusion. 5. Formed leads to be planar with respect to one another at seating 1.30 place -C-. 1.40 9.65 10.29 2.54 BSC 15.88 2.79 1.40 0. E-PIN R (2 PLCS - -B- -A- REV. 1.3.1 11/18/02 RC1117 ...

Page 9

... RC1117M285 2.85 volt RC1117M285T 2.85 volt RC1117S285T 2.85 volt RC1117D33X 3.3 volt RC1117M33 3.3 volt RC1117M33T 3.3 volt RC1117S33T 3.3 volt RC1117D5X 5 volt RC1117M5 5 volt RC1117M5T 5 volt RC1117S5T 5 volt DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN ...

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