CLM1117 CALOGIC | Alldatasheet

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Technical content

800mA Low Dropout Regulator SCSI-II Active Terminator CLM1117

FEATURES

  • • Guaranteed 800mA Output
  • • Three Terminal Adjustable or Fixed 2.85V, 3V, 3.3V, 5V, 10V & 12V
  • • Very Low Quiescent Current
  • • Low Dropout Voltage of 1.2 Volts at Full Load
  • • Extremely Tight Load and Line Regulation
  • • Very Low Temperature Coefficient
  • • Fixed 2.8V Device for SCSI-II Active Terminator
  • • Logic-Controlled Electronic Shutdown
  • • Internal Overcurrent Limiting & Thermal Overload Protection
  • • Surface Mount Package SOT-223

APPLICATIONS

  • • SCSI-II Active Terminator
  • • Portable/ Palm Top / Notebook Computers
  • • Battery Chargers
  • • Disk Drives
  • • Portable Consumer Equipment
  • • Portable Instrumentation
  • • SMPS Post-Regulator PRODUCT DESCRIPTION The Calogic CLM1117 is a low power positive voltage regulator designed to meet 800mA output current and comply with SCSI-II specifications with a fixed output voltage of 2.85V. This device is an excellent choice for use in battery- powered applications, as active terminators for the SCSI bus, and portable computers. The CLM1117 features very low quiescent current and very low dropout voltage of 1.2V at a full load and lower as output current decreases. This product is available as an adjustable or fixed 2.85V, 3V, 3.3V, and 5V output voltages. The device is offered in a 3-pin surface mount package SOT-223. The output capacitor of 10µF or larger is needed for output stability of CLM1117 as required by most of the other regulator circuits.

ORDERING INFORMATION

CLM1117M SOT-223 Industrial CLM1117M-X SOT-223 Industrial X = Output Voltage. 5V = Standard. Contact factory for 2.85V, 3.0V, 3.3V, 10V and 12V. CORPORATION PIN CONNECTIONS SOT-223 TAB IS GND CLM1117 ADJ./GND V OUT VIN 123 1N-12 FRONT VIEW CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

Operating Junction Temperature Range oC to +125oC CLM1117 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CORPORATION ELECTRICAL CHARACTERISTICS : VIN = VOUT +1, TA = 25oC, CL = 3.3µf, unless otherwise noted. Boldface apply over full operating temperature range. PARAMETER TYP MIN MAX UNITS CONDITIONS Output Voltage 2.85 2.85 2.85 3.0 3.0 3.30 3.30 5.0 5.0 2.82 2.79 2.79 2.97 2.94 3.27 3.24 4.95 4.90 2.88 2.91 2.91 3.03 3.06 3.33 3.36 5.05 5.10 V IOUT = 10mA, IIN = 4.85V 0 ≤ IOUT ≤ 800mA, 4.25 ≤ VIN ≤ 10V 0 ≤ IOUT ≤ 500mA, VIN = 4.05V IOUT = 10mA, VIN = 5.00V 0 ≤ IOUT ≤ 800mA, 4.50 ≤ VIN ≤ 10V IOUT = 10mA, IIN = 5.30V 0 ≤ IOUT ≤ 800mA, 4.80 ≤ VIN ≤ 10V IOUT = 10mA, IIN = 7.00V 0 ≤ IOUT ≤ 800mA, 6.50 ≤ VIN ≤ 12V Output Voltage Temperature Stability 0.05 % (Note 1) Line Regulation 1.00 1.00 1.00 1.00 6.00 7.00 7.00 10.00 mV 4.25V ≤ VIN ≤ 10V, VOUT = 2.85, IOUT = 0 4.50V ≤ VIN ≤ 12V, VOUT = 3.00, IOUT = 0 4.80V ≤ VIN ≤ 12V, VOUT = 3.30, IOUT = 0 4.50V ≤ VIN ≤ 15V, VOUT = 5.00, IOUT = 0 Load Regulation 1.00 1.00 1.00 1.00 10.00 12.00 12.00 15.00 mV 0 ≤ IOUT ≤ 800mA, VIN = 4.25V, VOUT = 2.85 0 ≤ IOUT ≤ 800mA, VIN = 4.50V, VOUT = 3.00 0 ≤ IOUT ≤ 800mA, VIN = 4.80V, VOUT = 3.30 0 ≤ IOUT ≤ 800mA, VIN = 6.50V, VOUT = 5.00 Dropout Voltage (Note 2) 1.00 1.05 1.10 1.10 1.15 1.20 V IL = 100mA IL = 500mA IL = 800mA Quiescent Voltage 5.00 10.00 mA 4.25V ≤ VIN ≤ 6.5V Current Limit 800 950 1200 mA (V IN - VOUT ) = 5V Thermal Regulation 0.01 0.1 %/W 25 oC, 30mS Pulse Ripple Rejection 60 75 dB f RIPPLE = 120Hz, (VIN - VOUT ) = 3V, VRIPPLE = 1Vp-p Long Term Stability 0.03 % 125 oC, 1000Hrs RMS Output Noiase 0.003 % % of V OUT , 10Hz ≤ f ≤ 10kHz Thermal Resistance 15 oC/W o Junction to case, at tab Note 1: Output temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 2: Dropout voltage is defined as the input to output differential at which the output voltage drops 100mV below its nominal value measured at 1V differential at very low values of programmed output voltage, the minimum input supply voltage of 2V (2.3V over temperature) must be taken input account. Note 3: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effect.

the applications. The recommended value for ESR is 0.5Ω . high as 100µF can improve the load transient response. with infrared reflow or vapor-phase reflow soldering techniques. which exits opposite the input, output, and ground pins. oC of the soldering temperature range. application can effect the thermal resistance of the CLM1117. Maximum Junction Temperature must not exceed 125oC. FIGURE 1. CIRCUIT LAYOUT, THERMAL EXPERIMENTS FIGURE 2. SUBSTRATE LAYOUT FOR SOT-223

50 X 50mm

35 X 17mm

16 X 10mm

ACTIVE VS PASSIVE TERMINATION The improvement in noise immunity and low quiescent power of the terminator of less than 1W is the key advantage of active termination compared to passive termination. The CLM1117 significantly improves the noise level and signals on the bus by the terminating point due to variations in voltage at the termination point due to variation in the V term power line. Another advantage of active termination is the improvement in the impedance matching. The low impedance of the device makes the termination resistance more closely matched to the impedance of the cable. This improvement increases the data rate by 10 times, from 1mbyte/s to 10mbyte/s. The CLM1117 increases the protection and the reliability of the application since it features internal current limiting, overvoltage protection, and thermal protection. CLM1117 ACTIVE TERMINATION CONFIGURATION IN5817 TERMPWR CLM1117-2.85 10µF 2.85V 110KΩ

6 METERS MAX

10µF IN5817 CLM1117-2.85 10µF 2.85V110KΩ 10µF 110KΩ 110KΩ 110KΩ 110KΩ UP TO 27 LINES + + 1N-15 CORPORATION Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic. CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025