RC1616 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

  • Low dropout voltage
  • Load regulation: 0.05% typical
  • Current limit
  • On-chip thermal limiting
  • Standard SOT-223 and TO-252 packages
  • Three-terminal adjustable or fixed 2.5V , 3.3V or 5V

Applications

  • USB Controlled Power Supply
  • High efficiency linear regulators for Mixed V oltage Logic, ASIC, FPGA based systems
  • Post regulators for switching supplies
  • Battery chargers
  • 5V to 3.3V , or 2.5V , 1.8V , 1.5V linear regulators
  • Motherboard clock supplies
  • SDRAM Module supplies

Description

The RC1616 and RC1616-2.5, -3.3 and -5 are low dropout three-terminal regulators with 0.5A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 5V version is designed also to be used in USB Hub and Motherboard applications. On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the bias current of the RC1616 flows into the load, increasing efficiency. The RC1616 series regulators are available in the industry- standard SOT-223 and TO-252 power packages. Typical Applications VIN = 3.3V V IN VOUT ADJ 1.5V at 0.5A RC1616 10µF2 2 µF 124Ω 24.9Ω VIN = 5V V IN VOUT GND 3.3V at 0.5A RC1616-3.3 10µF + + 22µF RC1616 0.5A Adjustable/Fixed Low Dropout Linear Regulator

PRODUCT SPECIFICATION RC1616 REV. 1.0.8 5/20/02 Pin Assignments *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, Θ JA can vary from 30°C/W to >50°C/W. Other mounting techniques may provide better power dissipation than 30°C/W. Absolute Maximum Ratings Parameter Min. Max. Unit V IN 7.5 V Operating Junction Temperature Range 0 125 C Storage Temperature Range -65 150 C Lead Temperature (Soldering, 10 sec.) 300 C Front View Front View RC1616S (Variable) RC1616S-X (Fixed) RC1616D (Variable) RC1616D-X (Fixed) 4-Lead Plastic SOT -223 ΘJC = 15°C/W* 3-Lead Plastic TO-252 ΘJC = 3°C/W* Tab is VOUT IN OUT ADJ/GND ADJ/ GND OUT IN 2 3

RC1616 PRODUCT SPECIFICATION REV. 1.0.8 5/20/02

Electrical Characteristics

Operating Conditions: V IN 7V, T J = 25°C unless otherwise specified. The denotes specifications which apply over the specified operating temperature range. 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. 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. RC1616 only. Parameter Conditions Min. Typ. Max. Units Reference Voltage 1.5V IN - V OUT 5.75V, 10mA I OUT 0.5A 1.225 (-2%) 1.250 1.275 (+2%) V Output Voltage 10mA I OUT 0.5A RC1616-2.5, 4.0V V IN RC1616-3.3, 4.5V V IN RC1616-5, 6.2V V IN 2.450 3.234 4.900 2.500 3.300 5.000 2.550 3.366 5.100 V V V Line Regulation 1,2 OUT + 1.5V) V IN 7V, I OUT = 10mA 0.005 0.2 % Load Regulation 1,2,3 IN – V OUT ) = 2V, 10mA I OUT 0.5A 0.05 0.5 % Dropout Voltage V REF = 1%, I OUT = 0.5A 1.000 1.200 V Adjust Pin Current 35 120 µ A Adjust Pin Current Change 1.5V IN – V OUT 5.75, 10mA I OUT 0.5A 0.2 5 µ A Minimum Load Current 1.5V IN – V OUT 5.75 10 mA Quiescent Current V IN = V OUT + 1.25V 41 3 m A Ripple Rejection f = 120Hz, C OUT = 22 µ F Tantalum, IN – V OUT ) = 3V, I OUT = 0.5A 60 72 dB Thermal Regulation T A = 25 C, 30ms pulse 0.004 0.02 %/W Temperature Stability 0.5 % Long-Term Stability T A = 125 C, 1000hrs. 0.03 1.0 % RMS Output Noise (% of V OUT T A = 25 C, 10Hz f 10kHz 0.003 % Thermal Resistance, Junction to Case SOT-223 15 C/W TO-252 3 C/W Thermal Shutdown 150 C

0 MINIMUM LOAD CURRENT (mA)

Figure 1. Dropout Voltage vs. Output Current Figure 2. Load Regulation vs. Temperature Figure 3. Reference Voltage vs. Temperature Figure 4. Output Voltage vs. Temperature Figure 5. Minimum Load Current vs. Temperature Figure 6. Adjust Pin Current vs. Temperature

0.50 SHORT -CIRCUIT CURRENT (A)

Figure 7. Short-Circuit Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency Figure 9. Maximum Power Dissipation

PRODUCT SPECIFICATION RC1616 REV. 1.0.8 5/20/02 Mechanical Dimensions 3-Lead TO-252 Package A .086 .094 2.19 2.39 Symbol Inches Min. Max. Min. Max. Millimeters Notes b .025 .035 0.64 0.89 .045 1.14b2 .030 0.76 c .018 .024 0.46 0.61 c2 .018 .023 0.46 0.58 D .210 .245 5.33 6.22 1 E .250 .265 6.35 6.73 .090 BSC 2.29 BSC .108 REF 2.74 REF .370 .410 9.40 10.41 e H L .055 .070 1.40 1.78 .035 .080 0.89 2.03 .025 .040 0.64 1.02 .215 5.46b3 .205 5.21 E @PKG/ @HEATSINK D A -C- H L -A- α = 0° – 10° -B- E-PIN b2 L4 b e Notes: Dimensions are exclusive of mold flash, metal burrs or interlead protrusion. Stand off-height is measured from lead tip with ref. to Datum -B-. Foot length is measured with ref. to Datum -A- with lead surface. Thermal pad contour optional within dimension b3 and L3. Formed leads to be planar with respect to one another at seating place -C-. Dimensions and tolerances per ASME Y14.5M-1994.

RC1616 PRODUCT SPECIFICATION REV. 1.0.8 5/20/02 7 Mechanical Dimensions 4-Lead SOT-223 Package A — .071 Symbol Inches Min. Max. Min. Max. Millimeters Notes A1 — .181 .033B .025 c — .090 E .130 .148 e H .264 .287 .115 .124 .033 .041 — 10° F F I J D .248 .264 — 1.80 — 4.80 .840.640 — 2.29 3.30 3.71 6.71 7.29 .012 — .310 — 2.95 3.15 .840 1.04 — 10° 10° 16°K 10° 16° .0008 .0040L .0203 .1018 10° 16°M 10° 16° .010 .014N .250 .360 6.30 6.71 A D e E c H B I J K L M N

PRODUCT SPECIFICATION RC1616 LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 5/20/02 0.0m 004 Stock#DS30001616  2002 Fairchild Semiconductor Corporation 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; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

Ordering Information

RC1616D-2.5 TO-252 RC1616S-2.5 SOT-223 RC1616D-3.3 TO-252 RC1616S-3.3 SOT-223 RC1616D-5 TO-252 RC1616S-5 SOT-223