CLM2815 CALOGIC | Alldatasheet

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Technical content

1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output Fast Response CLM2815

FEATURES

  • • Extremely Tight Load And Line Regulation
  • • Current & Thermal Limiting
  • • Standard 3-Terminal Low Cost TO-220, TO-263 & TO-252
  • • Similar To Industry Standard LT1086/LT1586

APPLICATIONS

  • • Powering VGA & Sound Card
  • • Power PC  Supplies
  • • SMPS Post-Regulator
  • • High Efficiency "Green" Computer Systems
  • • High Efficiency Linear Power Supplies
  • • Portable Instrumentation
  • • Constant Current Regulators
  • • Adjustable Power Supplies
  • • Battery charger PRODUCT DESCRIPTION Calogic’s CLM2815 is a low power 1.5A adjustable and fixed voltage regulator. The device requires 2 external resistors to set the output for the adjustable version. The CLM2815 has been designed for low voltage applications that require lower dropout and faster transient responses. The device is well suited to power a low voltage microprocessor that requires a low dropout and a fast transient response to regulate from The product family offers full protection against over-current faults, reversed input polarity, reversed load insertion, and positive and negative transient voltage. On-chip trimming adjusts the reference voltage to 1% while delivering 1.5A output current. Encapsulated in a 3-pin TO-220, TO-263 & TO-252 packages.

ORDERING INFORMATION

Part Package Temperature Range CLM2815AU TO-220 -45 to +125 oC CLM2815AAU TO-220 -45 to +125 oC CLM2815AU-X TO-220 -45 to +125 oC CLM2815AAU-X TO-220 -45 to +125 oC CLM2815AT TO-263 (DD) -45 to +125 oC CLM2815AAT TO-263 (DD) -45 to +125 oC CLM2815AT-X TO-263 (DD) -45 to +125 oC CLM2815AAT-X TO-263 (DD) -45 to +125 oC CORPORATION PIN CONNECTIONS 1E-30AFRONT VIEW VIN VOUT CLM2815 PLASTIC TO-220 PACKAGE VADJ/GND 1E-29A PLASTIC TO-263 PACKAGE FRONT VIEWCLM2815 1V ADJ/GND VOUT VIN CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025

Operating Junction Temperature Range CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 ELECTRICAL CHARACTERISTICS (Note 1) at IOUT = 10mA, TA = 25oC, unless otherwise specified. PARAMETER TYP CLM2815A CLM2815 UNITS CONDITIONS MIN MAX MIN MAX 1.5V VERSION Output Voltage (Note 2) 1.5 1.5 1.485 1.470 1.515 1.530 1.470 1.455 1.530 1.545 V CLM2815-1.5V, 0 ≤ IOUT ≤ 1.5A, 2.75V ≤ VIN ≤ 7V 2.5V VERSION Output Voltage (Note 2) 2.5 2.5 2.475 2.450 2.525 2.550 2.450 2.425 2.550 2.575 V CLM2815-2.5V, 0 ≤ I OUT ≤ 1.5A, 3.5V ≤ VIN ≤ 7V 3.3V VERSION Output Voltage (Note 2) 3.3 3.3 3.270 3.240 3.330 3.360 3.230 3.201 3.370 3.399 V CLM2815-3.3V, 0 ≤ I OUT ≤ 1.5A, 4.75V ≤ VIN ≤ 7V 5.0V VERSION Output Voltage (Note 2) 5.0 5.0 4.95 4.90 5.05 5.10 4.900 4.850 5.100 5.150 V CLM2815-5.0V, 0 ≤ I OUT ≤ 1.5A, 5.5V ≤ VIN ≤ 7V ALL VOLTAGE OPTIONS Reference Voltage 1.5V ≤ (VIN - VOUT ) ≤ 5.75V, 10mA ≤ IOUT ≤ IOUT ≤ 5.75 Min. Load Current (Note 3)51 0 1 0 mA 1.5V ≤ (VIN - VOUT ) ≤ 5.75V Line Regulation (ΔVREF (IIN)) 0.005 0.2 0.2 % 2.75V ≤ VIN ≤ 7V, IOUT = 10mA, TJ = 125oC (Note 3) 0.005 0.2 0.2 V IN ≤ 7V, IOUT = 0mA, TJ = 125oC (Note 2) Load Regulation (ΔVREF (IOUT )) 0.05 0.3 0.3 % 10mA ≤ IOUT ≤ 1.5A, (VIN - VOUT ) = 3V, TJ = 25oC 0.05 0.3 0.3 0 ≤ IOUT ≤ 1.5A, VIN = 7V, TJ = 125oC (Note 2) Current Limit (IOUT(MAX) ) 2.5 1.7 1.7 A VIN = 7V ≤ 1.5A 1.4V ≤ (VIN - VOUT ) (Note 3) Long Term Stability 0.3 (Note 2) 11 % T A = 125oC, 1000 Hrs. Thermal Regulation (ΔVOUT (PWR)) 0.01 0.020 0.020 %/W T A = 25oC, 20ms pulse Temperature Stability (ΔVOUT (T)) 0.25 % Output Noise, RMS 0.003 %V O 10Hz to 10kHz, TA = 25oC Thermal Resistance 3.0 3.0 3.0 3.0 3.0 3.0 oC/W TO-220 Junction to Tab Junction to Ambient Junction to Ambient The Bold specifications apply to the over full operating temperature range. Note 1: Changes in output voltage due to heating effects are covered under the specification for thermal regulation. Note 2: Fixed version only. Note 3: Adustable version only. CLM2815 CORPORATION

The Calogic Semiconductor CLM2815 incorporates protection against over-current faults, reversed load insertion, over temperature operation, and positive and negative transient voltage. However, the use of an output capacitor is required in order to insure the stability and the performances. Stability The output capacitor is part of the regulator’s frequency compensation system. Either a 220µF aluminum electrolytic capacitor or a 47µF solid tantalum capacitor between the output terminal and ground guarantees stable operation for all operating conditions. However, in order to minimize overshoot and undershoot, and therefore optimize the design, please refer to the section ’Ripple Rejection’. Ripple Rejection Ripple rejection can be improved by adding a capacitor between the ADJ pin and ground. When ADJ pin bypassing is used, the value of the output capacitor required increases to its maximum (220µF for an aluminum electrolytic capacitor, or 47µF for a solid tantalum capacitor). If the ADJ pin is not bypass, the value of the output capacitor can be lowered to 100µF for an electrolytic aluminum capacitor or 15µF for a solid tantalum capacitor. However the value of the ADJ-bypass capacitor should be chosen with respect to the following equation: C = 1 / ( 6.28

  • FR • R1 ) Where C = value of the capacitor in Farads (select an equal or larger standard value), FR = ripple frequency in Hz, R1 = value of resistor R1 in Ohms. If an ADJ-bypass capacitor is used, the amplitude of the output ripple will be independent of the output voltage. If an ADJ-bypass capacitor is not used, the output ripple will be proportional to the ratio of the output voltage to the reference voltage: M = VOUT / VREF Where M = multiplier for the ripple seen when the ADJ pin is optimally bypassed. VREF = Reference Voltage Reducing parasitic resistance and inductance One solution to minimize parasitic resistance and inductance is to connect in parallel capacitors. This arrangement will improve the transient response of the power supply if your system requires rapidly changing current load condition. Thermal Consideration Although the CLM2815 offers some limiting circuitry for overload conditions, it is necessary not to exceed the maximum junction temperature, and therefore to be careful about thermal resistance. The heat flow will follow the lowest resistance path, which is the Junction-to-case thermal resistance. In order to insure the best thermal flow of the component, a proper mounting is required. Note that the case of the device is electrically connected to the output. In case the case has to be electrically isolated, a thermally conductive spacer can be used. However do not forget to consider its contribution to thermal resistance. Assuming: V IN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 90oC, Θ CASE = 1oC/W (no external heat sink, no wind) Power dissipation under these conditions PD = (VIN - VOUT ) • IOUT = 7.5W Junction Temperature TJ = TA + PD • (Θ CASE + Θ JC) For the Control Section TJ = 90oC + 7.5W • (1oC/W + 0.6oC/W) = 102oC 114oC TJUNCTION MAX for the control section. For the Power Section TJ = 90oC + 7.5W • (1oC/W + 1.6oC/W) = 104.5oC 109.5oC TJUNCT ION MAX for the power transistor. In both cases reliable operation is insured by adequate junction temperature. CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CLM2815 CORPORATION

CALOGIC CORPORATION , 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 TYPICAL APPLICATIONS 1E-37 CLM2815 OUT ADJ 1.5A CURRENT OUTPUT REGULATOR VIN R 1C 1 IN LOAD 1E-38 CLM2815 OUT ADJ TYPICAL ADJUSTABLE REGULATOR OUT ) + IADJ(1 + R1/R2= VREFVOUT VIN R 2 R 1 C 2 V C 1 IN R 2 1U-26 CLM2815 OUT ADJ 5V REGULATOR WITH SHUTDOWN OUT VIN 5VIN 10/G6d F 100/G6d F TTL OUTPUT 121/G57 365/G57 (NOTE A) VIN (MIN)= (INTENDED V ) + (V DROPOUT (MAX) )NOTE A: 2N3904 1U-25 CLM2815 OUT ADJ IMPROVING RIPPLE REJECTION OUT VIN IN 10/G6d F 150/G6d F 121/G57 365/G57 (NOTE A) VIN (MIN)= (INTENDED V ) + (V DROPOUT (MAX) ) NOTE A: R 1 R 2 + 10/G6d F C 1 VOUT *C IMPROVES RIPPLE REJECTION. X SHOULD BE - R AT RIPPLE FREQUENCY.

OUTPUT CURRENT (A) 1U-27 DROPOUT VOLTAGE 0 41 2 3 MINIMUM INPUT/OUTPUT DIFFERENTIAL (V) 0˚C TJ 120˚C TJ = 25˚C TJ = –55˚C TJ = 150˚C –40˚C TJ 150˚C 5 6 7 8 9 10 INDICATES GUARANTEED TEST POINT TEMPERATURE (˚C) 0.10 –0.20 –50 150 1E-31A LOAD REGULATION OUTPUT VOLTAGE DEVIATION (%) 0.05 –0.05 –0.10 –0.15 –25 0 25 50 75 100 125 TYPICAL PERFORMANCE CHARACTERISTICS INPUT/OUTPUT DIFFERENTIAL (V) 03 5 1E-32A SHORT CIRCUIT CURRENT SHORT CIRCUIT CURRENT (A) 5 1 01 52 02 53 0 25˚C 150˚C –55˚C IFULL LOAD INPUT/OUTPUT DIFFERENTIAL (V) 03 5 1U-28 MINIMUM OPERATING CURRENT MINIMUM OPERATING CURRENT (mA) 5 1 01 52 02 53 0 TJ = –55˚C TJ = 25˚C TJ = 150˚C TEMPERATURE (˚C) 1E-33 ADJUSTMENT PIN CURRENT –50 150–25 0 25 50 75 100 125 100 ADJUSTMENT PIN CURRENT ( µA) TEMPERATURE (˚C) 1.270 1.230 –50 150 1U-29 TEMPERATURE STABILITY OUTPUT VOLTAGE CHANGE (%) –25 0 25 50 75 100 125 1.240 1.260 1.250 CLM2815 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