RC1616

www.fairchildsemi.com RC1616 0.5A Adjustable/Fixed Low Dropout Linear Regulator 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 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 industrystandard SOT-223 and TO-252 power packages. Applications • USB Controlled Power Supply • High efficiency linear regulators for Mixed Voltage 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 Typical Applications RC1616 VIN = 3.3V 10µF + VIN ADJ VOUT 124Ω + 1.5V at 0.5A 22µF 24.9Ω RC1616-3.3 VIN = 5V 10µF + VIN GND VOUT + 3.3V at 0.5A 22µF REV. 1.0.8 5/20/02 PRODUCT SPECIFICATION RC1616 Pin Assignments RC1616S (Variable) RC1616S-X (Fixed) Front View 3 Tab is VOUT 2 1 IN OUT ADJ/GND 1 4-Lead Plastic SOT-223 ΘJC = 15°C/W* 2 3 RC1616D (Variable) RC1616D-X (Fixed) Front View OUT ADJ/ GND IN 3-Lead Plastic TO-252 ΘJC = 3°C/W* *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, ΘJA 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 VIN Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 0 -65 Min. Max. 7.5 125 150 300 Unit V °C °C °C 2 REV. 1.0.8 5/20/02 RC1616 PRODUCT SPECIFICATION Electrical Characteristics Operating Conditions: VIN ≤ 7V, TJ = 25°C unless otherwise specified. The • denotes specifications which apply over the specified operating temperature range. Parameter Reference Voltage3 Conditions 1.5V ≤ (VIN - VOUT) ≤ 5.75V, 10mA ≤ IOUT ≤ 0.5A 10mA ≤ IOUT ≤ 0.5A RC1616-2.5, 4.0V ≤ VIN ≤ 7V RC1616-3.3, 4.5V ≤ VIN ≤ 7V RC1616-5, 6.2V ≤ VIN ≤ 7V (VOUT + 1.5V) ≤ VIN ≤ 7V, IOUT = 10mA (VIN – VOUT) = 2V, 10mA ≤ IOUT ≤ 0.5A ∆VREF = 1%, IOUT = 0.5A 1.5V ≤ (VIN – VOUT) ≤ 5.75, 10mA ≤ IOUT ≤ 0.5A 1.5V ≤ (VIN – VOUT) ≤ 5.75 VIN = VOUT + 1.25V f = 120Hz, COUT = 22µF Tantalum, (VIN – VOUT) = 3V, IOUT = 0.5A TA = 25°C, 30ms pulse • TA = 125°C, 1000hrs. TA = 25°C, 10Hz ≤ f ≤ 10kHz • Min. 1.225 (-2%) 2.450 3.234 4.900 Typ. 1.250 Max. 1.275 (+2%) 2.550 3.366 5.100 0.2 0.5 1.200 120 5 Units V Output Voltage • • • • • • • • • • 2.500 3.300 5.000 0.005 0.05 1.000 35 0.2 V V V % % V µA µA mA Line Regulation1,2 Load Regulation1,2,3 Current3 Dropout Voltage Adjust Pin Adjust Pin Current Change3 Minimum Load Current Quiescent Current Ripple Rejection Thermal Regulation Temperature Stability Long-Term Stability RMS Output Noise (% of VOUT) 10 4 60 72 0.004 0.5 0.03 0.003 15 3 150 1.0 0.02 13 mA dB %/W % % % °C/W °C/W °C Thermal Resistance, Junction SOT-223 to Case TO-252 Thermal Shutdown 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. REV. 1.0.8 5/20/02 3 PRODUCT SPECIFICATION RC1616 Typical Performance Characteristics OUTPUT VOLTAGE DEVIATION (%) 1.5 1.4 DROPOUT VOLTAGE (V) 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0 0 0.2 0.4 0.6 0.8 1.0 TJ = 0°C TJ = 25°C TJ = 125°C 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 0 ∆I = 0.5A 25 50 75 100 125 150 175 OUTPUT CURRENT (A) JUNCTION TEMPERATURE (°C) Figure 1. Dropout Voltage vs. Output Current 1.250 1.245 REFERENCE VOLTAGE (V) Figure 2. Load Regulation vs. Temperature 3.70 3.65 REFERENCE VOLTAGE (V) 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 Note: 1. RC1616 Only 3.20 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) VOUT = 3.3V VOUT SET WITH 1% RESISTORS VOUT = 3.6V1 1.240 1.235 1.230 1.225 1.220 1.215 1.210 1.205 1.200 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 3. Reference Voltage vs. Temperature 5 MINIMUM LOAD CURRENT (mA) Figure 4. Output Voltage vs. Temperature 100 90 ADJUST PIN CURRENT (µA) Note: 1. RC1616 Only 4 80 70 60 50 40 30 20 10 3 2 1 0 -75 -50 -25 0 25 50 75 100 125 150 175 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) Figure 5. Minimum Load Current vs. Temperature Figure 6. Adjust Pin Current vs. Temperature 4 REV. 1.0.8 5/20/02 RC1616 PRODUCT SPECIFICATION Typical Performance Characteristics (continued) 1.50 SHORT-CIRCUIT CURRENT (A) 90 80 RIPPLE REJECTION (dB) 1.25 70 60 50 40 30 20 10 0.50 -75 -50 -25 0 25 50 75 100 125 150 175 0 10 (VIN - VOUT) ≤ 3V 0.5 ≤ VRIPPLE ≤ 2V IOUT = 0.5A 100 1K 10K 100K 1.00 0.75 TEMPERATURE (°C) FREQUENCY (Hz) Figure 7. Short-Circuit Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency 4 TO-252 3 POWER (W) 2 SOT-223 1 0 50 60 70 80 90 100 110 120 130 140 150 CASE TEMPERATURE (°C) Figure 9. Maximum Power Dissipation REV. 1.0.8 5/20/02 5 PRODUCT SPECIFICATION RC1616 Mechanical Dimensions 3-Lead TO-252 Package Symbol A b b2 b3 c c2 D E e H L L1 L3 L4 Inches Min. .086 .025 .030 .205 .018 .018 Max. .094 .035 .045 .215 .024 .023 Millimeters Min. 2.19 0.64 0.76 5.21 0.46 0.46 Max. 2.39 0.89 1.14 5.46 0.61 0.58 4 Notes: Notes 1. 2. 3. 4. 5. 1 1 6. 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. .210 .245 .250 .265 .090 BSC .370 .410 .055 .070 .108 REF .035 .025 .080 .040 5.33 6.22 6.35 6.73 2.29 BSC 9.40 10.41 1.40 1.78 2.74 REF 0.89 0.64 2.03 1.02 3 4 E @PKG/ @HEATSINK b3 L3 c2 D H b2 E-PIN L4 L1 L b e α = 0° – 10° -A- -B- A -C- 6 REV. 1.0.8 5/20/02 RC1616 PRODUCT SPECIFICATION Mechanical Dimensions 4-Lead SOT-223 Package Inches Min. A A1 B c D E e F H I J K L M N — — .025 — .248 .130 .115 .033 .264 .012 — 10° .0008 10° .010 Max. .071 .181 .033 .090 .264 .148 .124 .041 .287 — 10° 16° .0040 16° .014 Millimeters Min. — — .640 — 6.30 3.30 2.95 .840 6.71 .310 — 10° .0203 10° .250 Max. 1.80 4.80 .840 2.29 6.71 3.71 3.15 1.04 7.29 — 10° 16° .1018 16° .360 Symbol Notes D e K A H E B A1 c F J M I L N REV. 1.0.8 5/20/02 7 PRODUCT SPECIFICATION RC1616 Ordering Information Product Number RC1616D RC1616S RC1616D-2.5 RC1616S-2.5 RC1616D-3.3 RC1616S-3.3 RC1616D-5 RC1616S-5 Package TO-252 SOT-223 TO-252 SOT-223 TO-252 SOT-223 TO-252 SOT-223 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. 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. www.fairchildsemi.com 5/20/02 0.0m 004 Stock#DS30001616  2002 Fairchild Semiconductor Corporation 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.