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| Low Dropout Voltage Regulators CORPORATION CLM2931 FEATURES PRODUCT DESCRIPTION The CLM2931 is a positive low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The CLM2931 features very low quiescent current (0.4mA) and very low drop output voltage (typ. 50mV at light load and 300mV at 100mA). other features include the logic-compatible on/off input which enables the regulator to be switched on and off. The regulator output voltage may be internally pin-strapped for a 5V, 3V, 3.3V, 3.5V, 4.0V, 4.5V or programmed from 3V to 24V with an external pair of resistors. Using Calogic's design, process and testing technique make the CLM2931 superior over similar products. ORDERING INFORMATION PART CLM2931AS-X PACKAGE TEMPERATURE RANGE Industrial Plastic SOIC (8-Pin) * 5V, 3.3V, 3.5V, 4.0V, and 4.5V Versions Available * Output Current in Excess of 100mA * Input-Output Differential is Less Than 0.6V * Mirror-Image Insertion Protection * Internal Thermal Overload Protection * Available as Adjustable with TTL Compatible Switch * Similar to Industry Standard LM2931 * Reverse Battery Protection * Short Circuit Protection * 60V Load Dump Protection * -50V Reverse Transient Protection * Portable Instrumentation * Radio Control Systems * Cordless Telephones APPLICATIONS X = Output Voltage, 5V = standard product, for all other ranges contact factory. PIN CONNECTIONS 8-PIN SURFACE MOUNT, FIX OUTPUT OUTPUT 1 8 INPUT GND GND 2 CLM2931 3 7 6 GND GND NC 4 TOP VIEW 5 NC 8-PIN SRFACE MOUNT, ADJ. OUTPUT OUTPUT GND GND ADJ. 1 2 CLM2931 3 4 TOP VIEW 6 5 GND ON/OFF 8 7 INPUT GND 1M-07 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CLM2931 CORPORATION ABSOLUTE MAXIMUM RATINGS Power Dissipation . . . . . . . . . . . . . . . . . . . . . Internally Limited Lead Temp. (Soldering, 5 Seconds) . . . . . . . . . . . . . . . 260 oC Storage Temperature Range . . . . . . . . . . . . . . . -65 to +150oC Operating Junction Temperature Range . . . . . . . -40 to +85oC Input Supply Voltage . . . . . . . . . . . . . . . . . . . . . . 0.30 to +26V ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2KV ELECTRICAL CHARACTERISTICS: VS = 14V, TA = 25oC, IO = 10mA, C2 = 100F, unless otherwise specified. (Note 1) PARAMETER MIN 3V VERSION Output Voltage 3.3V VERSION Output Voltage 5V VERSION Output Voltage ALL VOLTAGE OPTIONS Long Term Stability Line Regulation Load Regulation Dropout Voltage 20 2.0 4.0 14 0.05 0.07 0.3 0.4 15 26 60 -15 -50 33 70 -30 -80 500 80 10 30 50 0.2 0.1 0.6 1.0 20 4.0 14 0.05 0.07 0.3 0.4 15 26 70 -15 -50 33 50 30 -80 500 80 30 50 0.2 0.1 0.6 1.0 mV/1000 mV mV V V V mA mA V V V V Vrms dB RL = 500, VO<5.5V, 100ms VO>-0.3V, RL = 500 1% Duty Cycle, <100ms, RL = 500 10Hz-100kHz, COUT = 100F fO = 120Hz 9V CLM2931A-3.3 3.23 3.20 3.30 3.30 3.36 3.39 CLM2931-3.3 3.20 3.16 3.30 3.30 CLM2931-5 4.75 4.50 5.0 5.25 5.50 V V 6V Quiescent Current Maximum Operational Input Current Maximum Line Transient Reverse Polarity Input Voltage, DC Reverse Polarity Input Voltage, Transient Output Noise Voltage Ripple Rejection CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CLM2931 CORPORATION ADJUSTABLE VERSION ONLY: VIN = 14V, VO = 3V, IO = 10mA, R1 = 27k, C2 = 100F, TJ = 25o PARAMETER Output Voltage Range Line Regulation Load Regulation Output Impedance Quiescent Current Output Noise Voltage Long Term Stability Ripple Rejection Dropout Voltage Maximum Operational Input Voltage Maximum Line Transient Reverse Polarity Input Voltage, DC Reverse Polarity Input Voltage, Transient On/Off Threshold Current Threshold Votage On Off Note 1: Note 2: Note 3: Note 4: 26 60 -15 -50 CLM2931C MIN 3.0 0.2 0.3 40 0.4 15 0.8 100 0.4 0.02 0.05 0.3 33 70 -30 -80 20 2.0 2.2 50 1.2 0.2 0.6 1.0 1.0 TYP MAX 24 1.5 1.0 UNITS V mV mV m/V mA mA mA Vrms %/1000h %/V V V V V V V A V VO = 3V IO = 10mA, Reference Voltage <1.5V VO>-0.3V, RL = 500 1% Duty Cycle, T<100ms, RL = 500 fO = 120Hz IO < 10mA IO = 100mA VOUT + 0.6V See TYPICAL APPLICATIONS notes to ensure constant junction temperature, low duty cycle pulse testing used. All limits are at 25 oC or over the full operating temperature junction range of -40oC to +125oC. The maximum power dissipation is a function of maximum junction temperature, total thermal resistance, and ambient temperature. Human body model, 100F discharged through 1.5K. APPLICATION HINTS The CLM2931 requires an output capacitor for device stability. The value required varies greatly depending upon the application circuit and other factors. The high frequency characteristics of electolytic capacitors depend greatly on the type and also on the manufacturer. Sometimes only bench testing is the only means to determine the proper capacitor type and value. The high quality 100F aluminum electrolytic covers all general application circuits, this stability can be obtained with a tantalum electrolytic value of 47F. Another critical point of electrolytic characteristics is its performance over temperature. The CLM2931 is designed to operate starting at -40oC which may not be true in the case of electrolytic. Higher temperatures are generally no problem. The electrolytic type in aluminum will freeze at around -30oC. This could cause an oscillation at output of regulator. At a lower temperature requirement by many applications the capacitor should maintain its performance. So as a result, for an application which regulator junction temperature does not exceed 25oC, the output capacitor can be reduced by the factor of two over the value needed for the entire temperature range. Other points with linear regulators is that the twitch higher output current stability decreases. In most applications the CLM2931 is operating at a few milliamps. In these applications the output capacitance can be further reduced. For example, when the regulator is running at 10mA output current the output capacitance value is half compared to the same regulator that is running at 100mA. With the CLM2931CT adjustable regulator, the minimum value of output capacitance is a function of the output voltage. The value decreases with higher output voltages, since the internal loop gain is reduced. The worst case occurs at the lower temperature and maximum operating currents, the entire circuit and the electrolytic, should be cooled down to the minimum temperature. The minimum of 0.6 volts required at the input of regulator above the output to keep the power dissipation and die heating to its minimum. After the value for the capacitor has been determined for actual use, the value should be doubled. CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CLM2931 CORPORATION TYPICAL APPLICATIONS VCC R3 51k IN OUT V CLM2931 FIXED OUTPUT OFF OUT VIN UNREGULATED INPUT C1 0.1 CLM2931 GND + VOUT REGULATED OUTPUT C2 100F ON/OFF C1 0.1F ON CLM2931 ADJUSTABLE ADJ GND R1 20k C2 100F R2 IQ 1M-06 CLM2931 FIXED OUTPUT VOUT = Reference Voltage x R1 + R2 R1 1M-09 CLM2931 ADJUSTABLE OUTPUT SCHEMATIC DIAGRAM VIN Q13 1 R6 6 Q1 Q2 R16 6k Q10 Q3 Z1 Z2 R19 200 R8 3k R3 32k ON/OFF R11 50k R13 40k R4 3.6k Q5 4x Q8 Q9 R2 5V: 100k ADJ: Q6 Q7 Q11 Q16 R16 14.7k R10 30k R12 140k D1 D15 140k R14 184k Z3 Z4 VOUT R1 5V: 20k ADJ: Q4 R5 2.1k Q15 Q12 1 1 R7 30k 5 Z6 ADJUST GND 1M-08 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CLM2931 CORPORATION TYPICAL PERFORMANCE CHARACTERISTICS 10 OUTPUT IMPEDANCE LM2931 - 3.0 IO = 10mA OUPUT IMPEDANCE () 1 70 60 50 40 30 20 10 0 6 4 2 0 -2 -100 OPERATION DURING LOAD DUMP INPUT VOLTAGE (V) = 150ms 0.1 0.01 1 10 100 1k 10k 100k 1M 1M-22 OUTPUT VOLTAGE (V) CO = 100F R L = 500 0 100 200 300 400 500 1M-23 FREQUENCY (Hz) TIME (ms) 1.28 REFERENCE VOLTAGE (V) 1.26 1.24 1.22 1.20 1.18 1.16 1.14 1.12 1.10 0 LM2031C ADJUSTABLE INPUT-OUTPUT DIFFERENTIAL (V) 1.30 REFERENCE VOLTAGE 0.6 0.5 0.4 0.3 0.2 0.1 0 DROPOUT VOLTAGE IO = 100mA IO = 50mA IO = 10mA 3 6 9 12 15 18 21 24 1M-24 OUTPUT VOLTAGE (V) 0 40 80 120 JUNCTION TEMPERATURE (C) 1M-25 0.6 INPUT-OUTPUT DIFFERENTIAL (V) 0.5 0.4 0.3 0.2 0.1 0 0 DROPOUT VOLTAGE 6.0 LOW VOLTAGE BEHAVIOR LM2931-5.0 IO = 100mA OUTPUT VOLTAGE (V) 5.0 4.0 3.0 2.0 1.0 50 OUTPUT CURRENT (mA) 100 1M-26 2.0 3.0 4.0 5.0 INPUT VOLTAGE (V) 6.0 1M-27 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CLM2931 CORPORATION TYPICAL PERFORMANCE CHARACTERISTICS (continued) 600 OUTPUT CURRENT (mA) 500 400 300 PEAK OUTPUT CURRENT QUIESCENT CURRENT (mA) 30 25 20 15 10 5 0 QUIESCENT CURRENT VIN = 14V TJ = 25C TJ = 85C TJ = -40C 200 100 0 0 10 20 INPUT VOLTAGE (V) 30 1M-28 0 30 60 OUTPUT CURRENT (mA) 90 1M-29 25 QUIESCENT CURRENT (mA) QUIESCENT CURRENT 1.0 20 POWER DISSIPATION (W) 15 10 3 2 1 0 -40 IO = 0mA IO = 50mA 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 40 80 120 JUNCTION TEMPERATURE (C) 1M-30 0 MAXIMUM POWER DISSIPATION (SO-8) 0 10 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE (C) 1M-31 22 20 POWER DISSIPATION (W) 18 16 14 12 10 8 6 4 2 0 MAXIMUM POWER DISSIPATION (TO-220) POWER DISSIPATION (W) 1.0 0.9 MAXIMUM POWER DISSIPATION (TO-92) INFINITE HEATSINK 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0.4" LEAD LENGTH FROM PC BOARD 0.125" LEAD LENGTH FROM PC BOARD 10C/W HEAT SINK NO HEAT SINK 0 10 20 30 40 50 60 70 80 90 100 AMBIENT TEMPERATURE (C) 1M-32 0 10 20 30 40 50 60 70 80 90 AMBIENT TEMPERATURE (C) 1M-33 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 |
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