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CORPORATION
1.5A Low Dropout Voltage Regulator Adjustable & Fixed Output Fast Response
CLM2815
FEATURES
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 +2.85V to 3.8V. The device is adjustable to 1.2 volts. 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 CLM2815AU CLM2815AAU CLM2815AU-X CLM2815AAU-X CLM2815AT CLM2815AAT CLM2815AT-X CLM2815AAT-X Package TO-220 TO-220 TO-220 TO-220 TO-263 (DD) TO-263 (DD) TO-263 (DD) TO-263 (DD) Temperature Range -45 to +125oC -45 to +125oC -45 to +125oC -45 to +125oC -45 to +125oC -45 to +125oC -45 to +125oC -45 to +125oC
* * * * * * * * * * * * * * * * *
Adjustable Output . . . . . . . . . . . . . . . . . . . Down To 1.2V Fixed Output Voltages. . . . . . . . . . . . . . 1.5, 2.5, 3.3, 5.0V Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5A Low Dropout Voltage. . . . . . . . . . . . . . . . . . . . . 1.1V Typ. 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 PCTM Supplies TM SMPS Post-Regulator High Efficiency "Green" Computer Systems High Efficiency Linear Power Supplies Portable Instrumentation Constant Current Regulators Adjustable Power Supplies Battery charger
PIN CONNECTIONS
PLASTIC TO-263 PACKAGE
CLM2815
PLASTIC TO-220 PACKAGE
CLM2815
3
2
VIN
VOUT
VIN VOUT
VADJ/GND
FRONT VIEW
1E-30A
1
V ADJ/GND
1E-29A
FRONT VIEW
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2815
CORPORATION
ABSOLUTE MAXIMUM RATINGS Lead Temp. (Soldering, 10 Seconds) . . . . . . . . . . . . . . 300oC Storage Temperature Range . . . . . . . . . . . . -65oC to +150oC Operating Junction Temperature Range CLM2815 Control Section . . . . . . . . . . . . . . -45oC +125oC CLM2815 Power Transistor . . . . . . . . . . . . . . -45oC +150oC Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10V Input to Output Voltage Differential . . . . . . . . . . . . . . . . . . 10V Maximum Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . 2A
ELECTRICAL CHARACTERISTICS (Note 1) at IOUT = 10mA, TA = 25oC, unless otherwise specified.
PARAMETER 1.5V VERSION Output Voltage (Note 2) 2.5V VERSION Output Voltage (Note 2) 3.3V VERSION Output Voltage (Note 2) 5.0V VERSION Output Voltage (Note 2) ALL VOLTAGE OPTIONS Reference Voltage (VREF) Min. Load Current (Note 3) Line Regulation (VREF (IIN)) Load Regulation (VREF (IOUT)) Dropout Voltage Current Limit (IOUT(MAX)) Long Term Stability Thermal Regulation (VOUT (PWR)) Temperature Stability (VOUT (T)) Output Noise, RMS Thermal Resistance 1.250 5 0.005 0.005 0.05 0.05 1.1 2.5 0.3 (Note 2) 0.01 0.25 0.003 3.0 60 3.0 60 3.0 60 3.0 60 3.0 60 3.0 60 1.7 1 0.020 1.225 1.270 10 0.2 0.2 0.3 0.3 1.2 1.7 1 0.020 1.225 1.270 10 0.2 0.2 0.3 0.3 1.2 V A % %/W % %VO
o
TYP
CLM2815A MIN 1.485 1.470 2.475 2.450 3.270 3.240 4.95 4.90 MAX 1.515 1.530 2.525 2.550 3.330 3.360 5.05 5.10
CLM2815 MIN 1.470 1.455 2.450 2.425 3.230 3.201 4.900 4.850 MAX 1.530 1.545 2.550 2.575 3.370 3.399 5.100 5.150
UNITS
CONDITIONS
1.5 1.5 2.5 2.5 3.3 3.3 5.0 5.0
V
CLM2815-1.5V, 0 IOUT 1.5A, 2.75V VIN 7V
V
CLM2815-2.5V, 0 IOUT 1.5A, 3.5V VIN 7V
V
CLM2815-3.3V, 0 IOUT 1.5A, 4.75V VIN 7V
V
CLM2815-5.0V, 0 IOUT 1.5A, 5.5V VIN 7V
V mA % %
VIN 7V, P PMAX 1.5V (VIN - VOUT ) 5.75V, 10mA I OUT IOUT 5.75 1.5V (VIN - VOUT ) 5.75V 2.75V VIN 7V, IOUT = 10mA, TJ = 125oC (Note 3) VIN 7V, I OUT = 0mA, TJ = 125oC (Note 2) 10mA IOUT 1.5A, (VIN - VOUT ) = 3V, TJ = 25oC 0 IOUT 1.5A, VIN = 7V, T J = 125oC (Note 2) VREF = 1%, IOUT = 1.5A (Note 3), IOUT 1.5A (Note 2) VIN = 7V 1.5A 1.4V (VIN - VOUT ) (Note 3) TA = 125 oC, 1000 Hrs. TA = 25oC, 20ms pulse
10Hz to 10kHz, TA = 25oC TO-220 Junction to Tab Junction to Ambient Junction to Tab Junction to Ambient
C/W
DD Package
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.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2815
CORPORATION
APPLICATION HINTS 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 220F aluminum electrolytic capacitor or a 47F 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 (220F for an aluminum electrolytic capacitor, or 47F for a solid tantalum capacitor). If the ADJ pin is not bypass, the value of the output capacitor can be lowered to 100F for an electrolytic aluminum capacitor or 15F 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 For the Power Section TJ = 90oC + 7.5W * (1oC/W + 1.6oC/W) = 104.5oC 109.5oC TJUNCTION MAX for the power transistor. In both cases reliable operation is insured by adequate junction temperature. 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: VIN = 10V, VOUT = 5V, IOUT = 1.5A, TA = 90oC, 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 * (CASE + JC) For the Control Section TJ = 90oC + 7.5W * (1oC/W + 0.6oC/W) = 102oC 114oC TJUNCTION MAX for the control section.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2815
CORPORATION
FIGURE 2. BASIC ADJUSTABLE REGULATOR
FIGURE 3. BASIC ADJUSTABLE REGULATOR
R P PARASITIC LINE RESISTANCE
VOUT
CLM2815
VREF I ADJ 50mA R2 R1
VOUT
VOUT
CLM2815
CONNECT R 1 TO CASE OF REGULATOR R1 RL R2 CONNECT R 2 TO LOAD
1U-24
VOUT = VREF (1 + R1 /R2 ) + IADJ R2
1U-23
Output Voltage Consider Figure 2. The resistance R1 generates a constant current flow, normally the specified load current of 10mA. This current will go through the resistance R2 to set the overall output voltage. The current IADJ is very small and constant. Therefore its contribution to the overall output voltage is very small and can generally be ignored.
Load Regulation Parasitic line resistance can degrade load regulation. In order not to affect the behavior of the regulator, it is best to connect directly the R1 resistance from the resistor divider to the case, and not to the load. For the same reason, it is best to connect the resistor R2 to the Negative side of the load.
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2815
CORPORATION
TYPICAL APPLICATIONS
VIN C1
IN
CLM2815
OUT R1
VIN C1
IN
CLM2815
OUT R1 C2
VOUT
ADJ
ADJ
LOAD
VOUT = VREF (1 + R1 /R 2 ) + IADJ R 2
R2
1.5A CURRENT OUTPUT REGULATOR
1E-37
TYPICAL ADJUSTABLE REGULATOR
1E-38
VIN (NOTE A)
5V
IN
CLM2815
OUT
R1 121 9 1%
VOUT
+
10mF
ADJ
150mF
*C1 IMPROVES RIPPLE REJECTION. X C SHOULD BE - R 1 AT RIPPLE FREQUENCY. R2 3659 1%
+
C1 10mF
NOTE A: VIN (MIN) = (INTENDED V OUT ) + (V DROPOUT (MAX) )
1U-25
IMPROVING RIPPLE REJECTION
VIN (NOTE A)
IN
CLM2815
OUT
121 9 1%
5V
+
10mF
1k 2N3904 TTL OUTPUT 1k ADJ
+
365 9 1%
100mF
NOTE A: VIN (MIN) = (INTENDED V OUT ) + (V DROPOUT (MAX))
1U-26
5V REGULATOR WITH SHUTDOWN
CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025
CLM2815
CORPORATION
TYPICAL PERFORMANCE CHARACTERISTICS
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
2
DROPOUT VOLTAGE
OUTPUT VOLTAGE DEVIATION (%)
INDICATES GUARANTEED TEST POINT
0.10 0.05 0 -0.05 -0.10 -0.15
LOAD REGULATION
-40C T J 150C 0C TJ 120C
1 TJ = -55C TJ = 25C TJ = 150C
0 0 1
2345678 OUTPUT CURRENT (A)
9
10
1U-27
-0.20 -50 -25
0 25 50 75 100 125 150 TEMPERATURE (C) 1E-31A
MINIMUM OPERATING CURRENT (mA)
12 SHORT CIRCUIT CURRENT (A) 10 8
SHORT CIRCUIT CURRENT
10 9 8 7 6 5 4 3 2 1 0 0
MINIMUM OPERATING CURRENT
25C
150C 6 -55C 4 2 0 0 5 10 15 20 25 30 35 INPUT/OUTPUT DIFFERENTIAL (V) 1E-32A IFULL LOAD
TJ = 150C TJ = 25C
TJ = -55C 5 10 15 20 25 30 35 INPUT/OUTPUT DIFFERENTIAL (V) 1U-28
100 ADJUSTMENT PIN CURRENT (A) 90 80 70 60 50 40 30 20 10
ADJUSTMENT PIN CURRENT
OUTPUT VOLTAGE CHANGE (%)
1.270
TEMPERATURE STABILITY
1.260
1.250
1.240
0 -50 -25
0 25 50 75 100 125 150 TEMPERATURE (C) 1E-33
1.230 -50 -25
0 25 50 75 100 125 150 TEMPERATURE (C) 1U-29
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

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