CAT6218 300mA CMOS LDO Regulator FEATURES DESCRIPTION Guaranteed 300mA output current The CAT6218 is a 300mA CMOS low dropout regulator that provides fast response time during load current and line voltage changes. Low dropout voltage of 180mV typical at 300mA Stable with 1μF ceramic output capacitor 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 150μs. External 10nF bypass capacitor for low noise Quick-start feature With zero shutdown current and low ground current of 55μA typical, the CAT6218 is ideal for batteryoperated devices with supply voltages from 2.3V to 5.5V. An internal under voltage lockout circuit disables the output at supply voltages under 2.1V typical. No-load ground current of 55μA typical Full-load ground current of 80μA typical ±1.0% output voltage initial accuracy ±2.0% accuracy over temperature The CAT6218 offers 1% initial accuracy and low dropout voltage, 180mV typical at 300mA. Stable operation is provided with a small value ceramic capacitor, reducing required board space and compo– nent cost. “Zero” current shutdown mode Fold-back current limit and under-voltage lockout Thermal protection Thin SOT23-5 package Other features include fold-back current current limit and thermal protection. APPLICATIONS The device is available in the low profile (1mm max height) 5-lead thin SOT23 package. Cellular phones Battery-powered devices Consumer Electronics For Ordering Information details, see page 9. PIN CONFIGURATION TYPICAL APPLICATION CIRCUIT TSOT-23 5-Lead (1mm height) VIN 1 VIN 2.3V to 5.5V 5 VOUT GND 2 4 BYP EN 3 OFF ON Top View © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice 1 CIN 1µF VIN VOUT CAT6218 EN BYP GND VOUT COUT 1µF CBYP (Optional) 10nF Doc. No. MD-4010 Rev. A CAT6218 PIN DESCRIPTIONS BLOCK DIAGRAM Pin # Name Function 1 VIN Supply voltage input. 2 GND Ground reference. Enable input (active high); a 2.5MΩ 3 EN pull-down resistor is provided. Optional bypass capacitor connection 4 BYP for noise reduction and PSRR enhancing. 5 VOUT LDO Output Voltage. VIN VIN VOUT LDO EN BYP Reference VOUT Shutdown Switch GND Figure 2. CAT6218 Functional Block Diagram PIN FUNCTION VIN is the supply pin for the LDO. A small 1μF 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 2.3V to 5.5V. The capacitor should be located near the device. ESR domain is 5mΩ to 500mΩ. VOUT can deliver a maximum guaranteed current of 300mA. For input-tooutput voltages higher than 1V, a continuous 300mA output current might turn-on the thermal protection. A 250Ω internal shutdown switch discharges the output capacitor in the no-load condition. EN is the enable control logic (active high) for the regulator output. It has a 2.5MΩ pull-down resistor, which assures that if EN pin is left open, the circuit is disabled. 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 1μF ceramic bypass capacitor is required between the VOUT pin and ground for stability. For better transient response, its value can be increased to 4.7μF. BYP is the reference bypass pin. An optional 0.01μF capacitor can be connected between BYP pin and GND to reduce the output noise and enhance the PSRR at high frequency. ABSOLUTE MAXIMUM RATINGS (1) Parameter VIN VEN, VOUT Junction Temperature, TJ Power Dissipation, PD Storage Temperature Range, TS Lead Temperature (soldering, 5 sec.) ESD Rating (Human Body Model) Rating 0 to 6.5 -0.3 to VIN + 0.3 +150 Internally Limited (2) -65 to +150 260 3 Unit V V °C mW °C °C kV RECOMMENDED OPERATING CONDITIONS (3) Parameter VIN VEN Junction Temperature Range, TJ Package Thermal Resistance (SOT23-5), θJA Range 2.3 to 5.5 0 to VIN -40 to +125 235 Unit V V °C °C/W Typical application circuit with external components is shown on page 1. Notes: (1) Exceeding maximum rating may damage the device (2) The maximum allowable power dissipation at any TA (ambient temperature) is PDmax = (TJmax – TA)/θJA. Exceeding the maximum allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. (3) The device is not guaranteed to work outside its operating rating. Doc. No. MD-4010 Rev. A 2 © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT6218 ELECTRICAL OPERATING CHARACTERISTICS (1) VIN = VOUT + 1.0V, VEN = High, IOUT = 100μA, CIN = COUT = 1µF, ambient temperature of 25ºC (over recommended operating conditions unless specified otherwise). Bold numbers apply for the entire junction temperature range. Symbol Parameter Conditions VOUT-ACC Initial accuracy Output Voltage Accuracy TCOUT Output Voltage Temp. Coefficient VR-LINE Line Regulation VIN = VOUT + 1.0V to 5.5V VR-LOAD Load Regulation IOUT = 100μA to 300 mA VDROP Dropout Voltage (2) IOUT = 300mA IGND Min +1.0 -2.0 +2.0 40 -0.2 Shutdown Ground Current PSRR Power Supply Rejection Ratio ISC TON ±0.1 -0.4 +0.2 1.2 1.5 180 250 300 55 Unit % ppm/ºC +0.4 0.7 %/V % mV 75 90 IOUT = 300mA IGND-SD Max -1.0 IOUT = 0μA Ground Current Typ μA 80 1 VEN < 0.4V 2 μA f = 1kHz, CBYP = 10nF 64 f = 20kHz, CBYP = 10nF 54 Output short circuit current limit VOUT = 0V 180 mA Turn-On Time CBYP = 10nF 150 μs BW = 10Hz to 100kHz 45 μVrms Shutdown Switch Resistance 250 Ω Enable pull-down resistor 2.5 MΩ VUVLO Under-voltage lock out (UVLO) threshold 2.1 V ESR COUT equivalent series resistance eN ROUT-SH REN Output Noise Voltage (3) 5 dB 500 mΩ Enable Input VHI Logic High Level VIN = 2.3 to 5.5V VLO Logic Low Level VIN = 2.3 to 5.5V IEN Enable Input Current V 1.8 0.4 VEN = 0.4V 0.15 1 VEN = VIN 1.5 4 V μA Thermal Protection TSD Thermal Shutdown 160 ºC THYS Thermal Hysteresis 10 ºC Notes: (1 Specification for 2.85V output version unless specified otherwise. (2) Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. During test, the input voltage stays always above the minimum 2.3V. (3) Specification for 1.8V output version. © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice 3 Doc. No. MD-4010 Rev. A CAT6218 TYPICAL CHARACTERISTICS (shown for 2.85V output version) VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified. Line Regulation Dropout Characteristics 3.0 2.87 2.5 OUTPUT VOLTAGE [V] OUTPUT VOLTAGE [V] 100μA 2.0 300mA 1.5 1.0 0.5 0.0 1.0 2.0 3.0 4.0 5.0 INPUT VOLTAGE [V] 2.84 2.83 2.5 6.0 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE [V] 5.5 Output Voltage vs. Temperature Load Regulation 2.95 2.87 OUTPUT VOLTAGE [V] OUTPUT VOLTAGE [V] 2.85 2.82 0.0 2.90 2.85 2.80 2.75 0 2.86 2.85 2.84 2.83 2.82 50 100 150 200 250 300 OUTPUT LOAD CURRENT [mA] -40 Ground Current vs. Load Current -10 20 50 80 110 140 TEMPERATURE [°C] Ground Current vs. Temperature 100 65 GROUND CURRENT [μA] GROUND CURRENT [μA] 2.86 90 80 70 60 50 60 55 50 45 0 Doc. No. MD-4010 Rev. A 25 50 75 100 125 150 OUTPUT LOAD CURRENT [mA] -40 4 -10 20 50 80 110 140 TEMPERATURE [°C] © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT6218 TYPICAL CHARACTERISTICS (shown for 2.85V output option) VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified. Ground Current vs. Input Voltage 3.0 70 2.5 60 GROUND CURRENT [μA] OUTPUT VOLTAGE [V] Output Voltage vs. Load Current 2.0 1.5 1.0 0.5 50 40 30 20 10 0 0.0 0 0.0 100 200 300 400 500 600 700 OUTPUT LOAD CURRENT [mA] Dropout vs. Temperature (300mA Load) 6.0 300 DROPOUT VOLTAGE [mV] DROPOUT VOLTAGE [mV] 2.0 3.0 4.0 5.0 INPUT VOLTAGE [V] Dropout vs. Load Current 350 300 250 200 150 100 -40 250 200 150 100 50 0 -10 20 50 80 110 140 TEMPERATURE [°C] 0 50 100 150 200 250 300 OUTPUT LOAD CURRENT [mA] PSRR vs. Frequency (10mA Load) Enable Threshold vs. Input Voltage 1.6 80 CBY P = 10nF 70 60 1.2 PSRR [dB] ENABLE THRESHOLD [V] 1.0 0.8 0.4 50 40 CBY P = 0 30 20 10 0.0 0 0.01 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE [V] © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice 5 0.1 1 10 FREQUENCY [kHz] 100 Doc. No. MD-4010 Rev. A CAT6218 TYPICAL CHARACTERISTICS (shown for 2.85V output option) VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified. PSRR (200mA Load) PSRR (30mA Load) 70 70 1kHz 60 10kHz 50 1kHz 50 PSRR [dB] PSRR [dB] 10kHz 60 40 30 100kHz 40 30 20 20 10 10 0 100kHz 0 0 Doc. No. MD-4010 Rev. A 100 200 300 400 VIN - VOUT [mV] 500 0 6 100 200 300 400 VIN - VOUT [mV] 500 © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT6218 TRANSIENT CHARACTERISTICS (shown for 2.85V output option) VIN = 3.85V, IOUT = 100μA, CIN = COUT = 1μF, CBYP = 10nF, TA = 25°C unless otherwise specified. Note: All transient characteristics are generated using the evaluation board CAT621XEVAL1. Enable Turn-On (100μA Load) Enable Turn-Off (100μA Load) Enable Turn-On (300mA Load) Enable Turn-Off (300mA Load) Load Transient Response (0.1mA to 300mA) Line Transient Response (3.85V to 4.85V) © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice 7 Doc. No. MD-4010 Rev. A CAT6218 PACKAGE DIMENSIONS 5-LEAD TSOT-23 (1)(2) e e E E1 e1 SYMBOL MIN NOM MAX A — — 1.00 A1 0.01 0.05 0.10 A2 0.80 0.87 0.90 b 0.30 — 0.45 c 0.12 0.15 0.20 D 2.90 BSC E 2.80 BSC E1 1.60 BSC e 0.95 BSC e1 1.90 BSC L 0.30 0.40 L1 0.60 REF L2 0.25 BSC θ 0.50 0º 8º D A2 GAUGE PLANE c A L2 b θ L A1 L1 For current Tape and Reel information, download the PDF file from: http://www.catsemi.com/documents/tapeandreel.pdf. Notes: (1) All dimensions are in millimeters, angles in degrees. (2) Refer JEDEC MO-193. Doc. No. MD-4010 Rev. A 8 © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice CAT6218 EXAMPLE OF ORDERING INFORMATION Prefix Device # CAT 6218 Company ID Product Number 6218 Part Number (1)(2)(3)(5) Suffix -180 TD -G VOUT Voltage (4) 180: 1.80V 240: 2.40V 270: 2.70V 285: 2.85V 300: 3.00V 320: 3.20V 330: 3.30V Package TD: TSOT-23 Lead Finish G: NiPdAu Tape & Reel T: Tape & Reel 3: 3000 Units/Reel VOUT Voltage Package Quantity per Reel 1.80V TSOT-23 3000 CAT6218-240TD-GT3 2.40V TSOT-23 3000 CAT6218-270TD-GT3 2.70V TSOT-23 3000 2.85V TSOT-23 3000 3.00V TSOT-23 3000 3.20V TSOT-23 3000 3.30V TSOT-23 3000 CAT6218-180TD-GT3 CAT6218-285TD-GT3 (4) (4) CAT6218-300TD-GT3 CAT6218-320TD-GT3 (4) CAT6218-330TD-GT3 T3 Notes: (1) All packages are RoHS-compliant (Lead-free, Halogen-free). (2) The standard finish is NiPdAu. (3) The device used in the above example is a CAT6218-180 TD-GT3 (VOUT = 1.8V, in an TSOT-23 package, NiPdAu, Tape and Reel, 3000 units). (4) Standard voltages are 2.4V, 2.7V, 3.0V, and 3.3V. For other voltage options, please contact your nearest Catalyst Semiconductor Sales office. (5) Top marking for CAT6218 is RU. © 2007 Catalyst Semiconductor, Inc. Characteristics subject to change without notice 9 Doc. No. MD-4010 Rev. A REVISION HISTORY Date 06/19/2007 Rev. A Reason Preliminary Revision Copyrights, Trademarks and Patents Trademarks and registered trademarks of Catalyst Semiconductor include each of the following: Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, and Quad-Mode™ Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its products. CATALYST SEMICONDUCTOR MAKES NO WARRANTY, REPRESENTATION OR GUARANTEE, EXPRESS OR IMPLIED, REGARDING THE SUITABILITY OF ITS PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES. Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where personal injury or death may occur. Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled "Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale. Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical semiconductor applications and may not be complete. Catalyst Semiconductor, Inc. Corporate Headquarters 2975 Stender Way Santa Clara, CA 95054 Phone: 408.542.1000 Fax: 408.542.1200 www.catsemi.com Document No: MD-4010 Revision: A Issue date: 06/19/07