CAT6218 300 mA CMOS LDO Regulator Description The CAT6218 is a 300 mA CMOS low dropout regulator that provides fast response time during load current and line voltage changes. The quick−start feature allows the use of an external bypass capacitor to reduce the overall output noise without affecting the turn−on time of just 150 ms. With zero shutdown current and low ground current of 55 mA typical, the CAT6218 is ideal for battery−operated devices with supply voltages from 2.3 V to 5.5 V. An internal under voltage lockout circuit disables the output at supply voltages under 2.1 V typical. The CAT6218 offers 1% initial accuracy and low dropout voltage, 180 mV typical at 300 mA. Stable operation is provided with a small value ceramic capacitor, reducing required board space and component cost. Other features include fold−back current limit and thermal protection. The device is available in the low profile (1 mm max height) 5−lead thin SOT23 package. http://onsemi.com 5 1 TSOT−23 TD SUFFIX CASE 419AE PIN CONNECTIONS 1 VOUT VIN GND BYP EN (Top View) Features • • • • • • • • • • • • • • Guaranteed 300 mA Output Current Low Dropout Voltage of 180 mV Typical at 300 mA Stable with 1 mF Ceramic Output Capacitor External 10 nF Bypass Capacitor for Low Noise Quick−start Feature No−load Ground Current of 55 mA Typical Full−load Ground Current of 80 mA Typical ±1.0% Initial Accuracy (VOUT ≥ 2.0 V) ±2.0% Accuracy Over Temperature (VOUT ≥ 2.0 V) “Zero” Current Shutdown Mode Fold−back Current Limit and Under−voltage Lockout Thermal Protection Thin SOT23−5 Package These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant Applications • Cellular Phones • Battery−powered Devices • Consumer Electronics MARKING DIAGRAM RUYM RU= CAT6218 Device Code Y = Production Year (last digit) M = Production Month: 1 − 9, A, B, C PIN FUNCTION Pin # Name 1 VIN Supply voltage input. 2 GND Ground reference. 3 EN Enable input (active high); a 2.5 MW pull−down resistor is provided. 4 BYP Optional bypass capacitor connection for noise reduction and PSRR enhancing. 5 Function VOUT LDO Output Voltage. ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 9 of this data sheet. © Semiconductor Components Industries, LLC, 2011 January, 2011 − Rev. 5 1 Publication Order Number: CAT6218/D CAT6218 VIN VIN 2.3 V to 5.5 V OFF ON CIN 1 μF VIN VOUT CAT6218 EN BYP GND VIN VOUT COUT 1 μF VOUT LDO EN Reference BYP CBYP (Optional) 10 nF VOUT Shutdown Switch GND Figure 1. Typical Application Circuit Figure 2. CAT6218 Functional Block Diagram Pin Function VIN is the supply pin for the LDO. A small 1 mF ceramic bypass capacitor is required between the VIN pin and ground near the device. When using longer connections to the power supply, CIN value can be increased without limit. The operating input voltage range is from 2.3 V to 5.5 V. EN is the enable control logic (active high) for the regulator output. It has a 2.5 MW pull−down resistor, which assures that if EN pin is left open, the circuit is disabled. The capacitor should be located near the device. ESR domain is 5 mW to 500 mW. VOUT can deliver a maximum guaranteed current of 300 mA. For input−to−output voltages higher than 1 V, a continuous 300 mA output current might turn−on the thermal protection. A 250 W internal shutdown switch discharges the output capacitor in the no−load condition. GND is the ground reference for the LDO. The pin must be connected to the ground plane on the PCB. VOUT is the LDO regulator output. A small 1 mF ceramic bypass capacitor is required between the VOUT pin and ground for stability. For better transient response, its value can be increased to 4.7 mF. BYP is the reference bypass pin. An optional 0.01 mF capacitor can be connected between BYP pin and GND to reduce the output noise and enhance the PSRR at high frequency. Table 1. ABSOLUTE MAXIMUM RATINGS Parameter VIN Unit 0 to 6.5 V −0.3 to VIN + 0.3 V +150 _C Internally Limited (Note 1) mW −65 to +150 _C 260 _C 3 kV VEN, VOUT Junction Temperature, TJ Power Dissipation, PD Rating Storage Temperature Range, TS Lead Temperature (soldering, 5 sec.) ESD Rating (Human Body Model) Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Table 2. RECOMMENDED OPERATING CONDITIONS (Note 2) Parameter Range Unit VIN 2.3 to 5.5 V VEN 0 to VIN V −40 to +125 _C 235 _C/W Junction Temperature Range, TJ Package Thermal Resistance (SOT23−5), θJA NOTE: Typical application circuit with external components is shown above. 1. The maximum allowable power dissipation at any TA (ambient temperature) is PDmax = (TJmax − TA)/qJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. 2. The device is not guaranteed to work outside its operating rating. http://onsemi.com 2 CAT6218 Table 3. ELECTRICAL OPERATING CHARACTERISTICS (Note 3) (VIN = VOUT + 1.0 V, VEN = High, IOUT = 100 mA, CIN = COUT = 1 mF, ambient temperature of 25°C (over recommended operating conditions unless specified otherwise). Bold numbers apply for the entire junction temperature range.) Symbol VOUT−ACC Parameter Output Voltage Accuracy TCOUT Output Voltage Temp. Coefficient VR−LINE Line Regulation Conditions Initial accuracy for VOUT ≥ 2.0 V (Note 6) Min Typ Max Unit −1.0 +1.0 % −2.0 +2.0 40 VIN = VOUT + 1.0 V to 5.5 V −0.2 ±0.1 −0.4 VR−LOAD Load Regulation IOUT = 100 mA to 300 mA ppm/°C +0.2 %/V +0.4 0.7 1.2 % 1.5 VDROP Dropout Voltage (Note 4) IOUT = 300 mA 180 250 mV 300 IGND Ground Current IOUT = 0 mA 55 IOUT = 300 mA 80 75 mA 90 IGND−SD Shutdown Ground Current VEN < 0.4 V 1 mA 2 PSRR Power Supply Rejection Ratio f = 1 kHz, CBYP = 10 nF 64 f = 20 kHz, CBYP = 10 nF 54 dB ISC Output short circuit current limit VOUT = 0 V 180 mA TON Turn−On Time CBYP = 10 nF 150 ms eN Output Noise Voltage (Note 5) BW = 10 Hz to 100 kHz 45 mVrms ROUT−SH Shutdown Switch Resistance 250 W Enable pull−down resistor 2.5 MW Under−voltage lock out (UVLO) threshold 2.1 V REN VUVLO ESR COUT equivalent series resistance 5 500 mW ENABLE INPUT VHI Logic High Level VIN = 2.3 to 5.5 V 1.8 VIN = 2.3 to 5.5 V, 0°C to +125°C junction temperature 1.6 VLO Logic Low Level VIN = 2.3 to 5.5 V IEN Enable Input Current VEN = 0.4 V VEN = VIN V 0.4 V 0.15 1 mA 1.5 4 THERMAL PROTECTION TSD Thermal Shutdown 160 °C THYS Thermal Hysteresis 10 °C 3. Specification for 2.80 V output version unless specified otherwise. 4. Dropout voltage is defined as the input−to−output differential at which the output voltage drops 2% below its nominal value. During test, the input voltage stays always above the minimum 2.3 V. 5. Specification for 1.8 V output version. 6. For VOUT < 2.0 V, the initial accuracy is ±2% and across temperature ±3%. http://onsemi.com 3 CAT6218 TYPICAL CHARACTERISTICS (shown for 2.80 V output option) (VIN = 3.85 V, IOUT = 100 mA, CIN = COUT = 1 mF, CBYP = 10 nF, TA = 25°C unless otherwise specified.) 2.87 3.0 100mA 2.86 OUTPUT VOLTAGE [V] OUTPUT VOLTAGE [V] 2.5 2.0 300mA 1.5 1.0 0.5 2.85 2.84 2.83 2.82 0.0 0.0 1.0 2.0 3.0 4.0 5.0 INPUT VOLTAGE [V] 2.5 6.0 Figure 3. Dropout Characteristics 2.87 2.86 2.90 OUTPUT VOLTAGE [V] OUTPUT VOLTAGE [V] 5.5 Figure 4. Line Regulation 2.95 2.85 2.80 2.75 2.85 2.84 2.83 2.82 0 50 100 150 200 250 300 OUTPUT LOAD CURRENT [mA] −40 Figure 5. Load Regulation −10 20 50 80 110 TEMPERATURE [°C] 140 Figure 6. Output Voltage vs. Temperature 65 100 90 GROUND CURRENT [mA] GROUND CURRENT [mA] 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE [V] 80 70 60 60 55 50 45 50 0 −40 25 50 75 100 125 150 OUTPUT LOAD CURRENT [mA] Figure 7. Ground Current vs. Load Current −10 20 50 80 110 TEMPERATURE [°C] 140 Figure 8. Ground Current vs. Temperature http://onsemi.com 4 CAT6218 TYPICAL CHARACTERISTICS (shown for 2.80 V output option) (VIN = 3.85 V, IOUT = 100 mA, CIN = COUT = 1 mF, CBYP = 10 nF, TA = 25°C unless otherwise specified.) 70 3.0 60 GROUND CURRENT [mA] OUTPUT VOLTAGE [V] 2.5 2.0 1.5 1.0 0.5 40 30 20 10 0 0.0 0 0.0 100 200 300 400 500 600 700 OUTPUT LOAD CURRENT [mA] Figure 9. Output Voltage vs. Load Current 1.0 2.0 3.0 4.0 INPUT VOLTAGE [V] 6.0 300 250 DROPOUT VOLTAGE [mV] 300 250 200 150 200 150 100 50 0 100 −40 −10 20 50 80 110 TEMPERATURE [°C] 0 140 Figure 11. Dropout vs. Temperature (300 mA Load) 50 100 150 200 250 OUTPUT LOAD CURRENT [mA] 300 Figure 12. Dropout vs. Load Current 1.6 80 CBYP = 10 nF 70 60 1.2 PSRR [dB] ENABLE THRESHOLD [V] 5.0 Figure 10. Ground Current vs. Input Voltage 350 DROPOUT VOLTAGE [mV] 50 0.8 50 40 CBYP = 0 30 20 0.4 10 0 0.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE [V] 0.01 5.5 Figure 13. Enable Threshold vs. Input Voltage 0.1 1 10 FREQUENCY [kHz] 100 Figure 14. PSRR vs. Frequency (10 mA Load) http://onsemi.com 5 CAT6218 TYPICAL CHARACTERISTICS (shown for 2.80 V output option) (VIN = 3.85 V, IOUT = 100 mA, CIN = COUT = 1 mF, CBYP = 10 nF, TA = 25°C unless otherwise specified.) 70 70 1kHz 60 10kHz PSRR [dB] PSRR [dB] 1kHz 50 50 40 30 10kHz 60 100kHz 40 30 20 20 10 10 100kHz 0 0 0 100 200 300 400 VIN − VOUT [mV] 0 500 Figure 15. PSRR (30 mA Load) 100 200 300 400 VIN − VOUT [mV] 500 Figure 16. PSRR (200 mA Load) http://onsemi.com 6 CAT6218 TRANSIENT CHARACTERISTICS (shown for 2.80 V output option) (VIN = 3.85 V, IOUT = 100 mA, CIN = COUT = 1 mF, CBYP = 10 nF, TA = 25°C unless otherwise specified.) Figure 17. Enable Turn−on (100 mA Load) Figure 18. Enable Turn−off (100 mA Load) Figure 19. Enable Turn−on (300 mA Load) Figure 20. Enable Turn−off (300 mA Load) Figure 21. Line Transient Response (3.85 V to 4.85 V) Figure 22. Load Transient Response (0.1 mA to 300 mA) Note: All transient characteristics are generated using the evaluation board CAT621XEVAL1. http://onsemi.com 7 CAT6218 PACKAGE DIMENSIONS TSOT−23, 5 LEAD CASE 419AE−01 ISSUE O SYMBOL D MIN NOM A1 0.01 0.05 0.10 A2 0.80 0.87 0.90 b 0.30 c 0.12 A e E1 1.00 0.45 0.15 D 2.90 BSC E 2.80 BSC E1 1.60 BSC E MAX e 0.20 0.95 TYP L 0.30 0.40 L1 0.60 REF L2 0.25 BSC 0º θ 0.50 8º TOP VIEW A2 A b q L A1 c L1 SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MO-193. http://onsemi.com 8 L2 CAT6218 Example of Ordering Information (Note 9) Prefix Device # Suffix CAT 6218 −180 TD G T3 Company ID (Optional) Product Number 6218 VOUT Voltage (Note 10) 150: 1.50 V 180: 1.80 V 240: 2.40 V 250: 2.50 V 270: 2.70 V 280: 2.80 V 285: 2.85 V 300: 3.00 V 320: 3.20 V 330: 3.30 V Package TD: TSOT−23 Lead Finish G: NiPdAu Tape & Reel (Note 11) T: Tape & Reel 3: 3,000 / Reel ORDERING INFORMATION VOUT Voltage Package Shipping CAT6218−150TDGT3 Orderable Part Number 1.50 V TSOT−23 3,000 / Tape & Reel CAT6218−180TDGT3 1.80 V TSOT−23 3,000 / Tape & Reel CAT6218−240TDGT3 2.40 V TSOT−23 3,000 / Tape & Reel CAT6218−250TDGT3 2.50 V TSOT−23 3,000 / Tape & Reel CAT6218−270TDGT3 2.70 V TSOT−23 3,000 / Tape & Reel CAT6218−280TDGT3 2.80 V TSOT−23 3,000 / Tape & Reel CAT6218−285TDGT3 (Note 10) 2.85 V TSOT−23 3,000 / Tape & Reel CAT6218−300TDGT3 3.00 V TSOT−23 3,000 / Tape & Reel CAT6218−320TDGT3 (Note 10) 3.20 V TSOT−23 3,000 / Tape & Reel CAT6218−330TDGT3 3.30 V TSOT−23 3,000 / Tape & Reel 7. All packages are RoHS−compliant (Lead−free, Halogen−free). 8. The standard finish is NiPdAu. 9. The device used in the above example is a CAT6218−180TDGT3 (VOUT = 1.8 V, in a TSOT−23 package, NiPdAu, Tape & Reel, 3,000/Reel). 10. For other voltage options, please contact your nearest ON Semiconductor Sales office. 11. For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. 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