SEMTECH SC1541

SC1541 1.0A Low Dropout Voltage Regulator with Enable POWER MANAGEMENT Description Features The SC1541 is a high performance low dropout positive ‹ Low dropout performance, 1.3V max voltage regulator designed for use in applications where ‹ Full current rating over line and temperature power management is critical, such as battery powered ‹ Fast transient response systems. ‹ +2% total output regulation over line, load and temperature ‹ 10µA max. quiescent current in shutdown Additionally, the SC1541 provides excellent regulation ‹ Three fixed output voltages over variations in line, load and temperature. ‹ Line regulation 0.2% max. Outstanding features include low dropout performance ‹ Load regulation 0.4% max. at rated current, fast transient response, internal ‹ SO-8 and TO-263 packages current limiting and thermal shutdown protection of the output device. A very low quiescent current of 10µA in Applications shutdown mode reduces power dissipation. ‹ Low voltage microcontrollers ‹ Switching power supply post-regulation The SC1541 is available with three different voltage ‹ Instantly available circuits options as standard and two package options, SO-8 and ‹ Motherboards 5-lead TO-263. ‹ Battery operated equipment Typical Application Circuit U1 SC1541 V IN OUT IN VOUT ENABLE SIGNAL EN GND C1 C2 10uF 10uF min. Tantalum Tantalum Notes: (1) Input and output capacitors should be located close to the device. (2) Connect all pins to PCB (SO-8 package) for optimal thermal characteristics. (3) Increasing the output capacitor value will improve the overall transient response. (4) The device is enabled when V = V , and shut down when EN is pulled to ground. EN should not be taken higher EN IN than V . A CMOS signal referenced to V would be ideal for switching the SC1541 on and off. IN IN Revision: November 25, 2009 1 www.semtech.com SC1541 POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction. Operation outside of the parameters specified in the Electrical Characteristics section is not implied. Parameter Sm ymbol Ms aximu Unit Maximum Input Pin Voltage V , V 7V IN EN Power Dissipation PIW nternally Limited D Thermal Resistance Junction to Case SO-8 39 °C/W θ JC TO-263 3 Thermal Resistance Junction to Ambient (1) SO-8 65 °C/W θ JA TO-263 60 Operating Junction Temperature Range T 0C to 125 ° J Storage Temperature Range T -C 65 to 150 ° STG Lead Temperature (Soldering) 10 Sec T 3C 00 ° LEAD Note: (1) 1 inch square of 1/16” FR-4, double sided, 1 oz. minimum copper weight. Electrical Characteristics Unless otherwise specified: I = 0mA to 1A, V = V , 1.8V Option: V = 3.2V to 7.0V, 2.5 Option: V = 3.9V to 7.0V, O EN IN IN IN 3.3V Option: V = 4.7V to 7.0V. Values in bold apply over full operating temperature range. IN Pl arameter Sn ymbo Mp i Tx y Ms a Unit (1) Output Voltage V V = 5V, I=1 0mA -V +% 1 OUT IN OUT OUT -2 2 + (1) Line Regulation REG I=5 10mA 0.03 0.2 % (LINE) OUT (1) Load Regulation REG V=2 5V 0. 0.4 % (LOAD) IN (1)(2) Dropout Voltage V I=0 1A 1.1 1.30 V D OUT (1) Current Limit I 1.1 A CL QI uiescent Current V = V=5 5V 7 mA Q IN EN 10 V = 5V, V<6 0.25V 8 µA IN EN 10 EV nable Pin Control Voltage Device OFF 0.250V .45 EN DV evice ON ( + 0.5) (V +0.8) OUT OUT EI nable Pin Current V = 0V, V=1 5V (OFF) 0. 1.0 µA EN EN IN V = V=5 5V (ON) 1 25 EN IN  2004 Semtech Corp. 2 www.semtech.com SC1541 PRELIMINARY POWER MANAGEMENT Electrical Characteristics (Cont.) Unless otherwise specified: I = 0mA to 1A, V = V , 1.8V Option: V = 3.2V to 7.0V, 2.5 Option: V = 3.9V to 7.0V, O EN IN IN IN 3.3V Option: V = 4.7V to 7.0V. Values in bold apply over full operating temperature range. IN Pl arameter Sn ymbo Mp i Tx y Ms a Unit TT emperature Coefficient 0.005 %/C C TT emperature Stability 0.5 % S (3) RMS Output Noise V 0V .003 % N OUT (4) Ripple Rejection Ratio R V = 5V 60 72 dB A IN Notes: (1) Low duty cycle pulse testing with Kelvin connections required. (2) ΔV , ΔV = 1%. OUT REF (3) Bandwidth of 10 Hz to 10kHz. (4) 120Hz input ripple. (5) This device is ESD sensitive. Use of standard ESD handling precautions is required.  2004 Semtech Corp. 3 www.semtech.com SC1541 POWER MANAGEMENT Pin Configurations Ordering Information (1)(2) Device Package SC1541CM-X.X.TR TO-263-5 (3) SC1541CM-X.X.TRT SC1541CS-X.X.TR SO-8 (3) SC1541CS-X.X.TRT SO-8 Notes: (1) Where X.X denotes voltage options. Available TO-263-5 voltages are: 1.8V, 2.5V and 3.3V. Contact factory for PN IN FUNCTIO additional voltage options. (2) Only available in tape and reel packaging. A reel 1N E contains 800 (TO-263-5) or 2500 (SO-8) devices. (3) Halogen Free, and RoHS/WEEE compliant. 2D GN 3T /TAB OU 4N I Block Diagram 5C N Pin Descriptions P# in Name S# O-8 Pin Tn O-263-5 Pin Pin Functio E1 N 1 Active high enable for the regulator output. Connect toV if not being used. IN G2 ND 2 Ground pin. Bottom end of the internal feedback resistor chain. N4 C 5 No connection. I3 N 4 This is the input supply pin for the device. O8 UT5B , 6, 7, 3/TA This is the power output of the device. This pin is electrically connected to the tab of the TO-263-5 package.  2004 Semtech Corp. 4 www.semtech.com SC1541 POWER MANAGEMENT Outline Drawing - SO-8 DIMENSIONS INCHES MILLIMETERS A DIM MIN NOM MAX MIN NOM MAX D e - - A .053 .069 1.35 1.75 N - - A1 .004 .010 0.10 0.25 - - A2 .049 .065 1.25 1.65 - - 2X E/2 b .012 .020 0.31 0.51 - - c .007 .010 0.17 0.25 E1 D .189 .193 .197 4.80 4.90 5.00 E E1 .150 .154 .157 3.80 3.90 4.00 E .236 BSC 6.00 BSC e .050 BSC 1.27 BSC 12 - - h .010 .020 0.25 0.50 ccc C L .016 .028 .041 0.40 0.72 1.04 2X N/2 TIPS (.041) e/2 L1 (1.04) N 8 8 B - - 01 0° 8° 0° 8° aaa .004 0.10 bbb .010 0.25 D ccc .008 0.20 aaa C A2 h A SEATING PLANE h C A1 H bxN bbb C A-B D c GAGE PLANE 0.25 L 01 (L1) SEE DETAIL A DETAIL A SIDE VIEW NOTES: 1. CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES). 2. DATUMS AND TO BE DETERMINED AT DATUM PLANE -A- -B- -H- 3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 4. REFERENCE JEDEC STD MS-012, VARIATION AA. (1) Land Pattern - SO-8 X DIMENSIONS DIM INCHES MILLIMETERS C (.205) (5.20) G .118 3.00 (C) G Z P .050 1.27 X .024 0.60 Y .087 2.20 Y Z .291 7.40 P NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY. CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. 2. REFERENCE IPC-SM-782A, RLP NO. 300A. Note: (1) More copper area should be used to lower R as needed. TH(J-A)  2004 Semtech Corp. 5 www.semtech.com SC1541 POWER MANAGEMENT Outline Drawing - TO-263-5 A E DIMENSIONS E/2 INCHES MILLIMETERS DIM MIN NOM MAX MIN NOM MAX A .160 - .190 4.06 - 4.83 0 L1 A1 .000 - .010 0.00 - 0.25 - - b .020 .039 0.51 0.99 c .015 - .029 0.38 - 0.74 D c1 .045 - .065 1.14 - 1.65 - - H D .326 .380 8.28 9.65 D1 .270 -- 6.86 -- 123 4 5 - - E .380 .420 9.65 10.67 - - - - E1 .245 6.22 H .575 - .625 14.61 - 15.88 e .067 BSC 1.70 BSC L .070 - .110 1.78 - 2.79 L1 -- .066 -- 1.68 e N 5 5 0 - 15° - - 15° - b X N aaa BA 01 0°-- 8° 0° 8° aaa .010 0.25 A SEATING PLANE A1 B c1 SIDE VIEW SEE DETAIL A PLATED COPPER HEAT SPREADER D1 (L1) c E1 L 01 NOTES: DETAIL A 1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES). 2. DIMENSIONS "D" AND "E" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. (1) Land Pattern - TO-263-5 H DIMENSIONS DIM INCHES MILLIMETERS G .125 3.18 H .420 10.67 K .360 K 9.14 P .067 1.70 X .042 1.07 Y .140 3.56 Z .625 15.88 Z G Y P X NOTES: 1. CONTROLLING DIMENSIONS ARE IN INCHES (ANGLES IN DEGREES). 2. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. Note: (1) More copper area should be used to lower R as needed. TH(J-A) Contact Information Semtech Corporation Power Management Products Division 200 Flynn Road, Camarillo, CA 93012 Phone: (805)498-2111 FAX (805)498-3804  2004 Semtech Corp. 6 www.semtech.com