COS29302

COS2915X/2930X/2950X/2975X High-Current Low Dropout Regulators Features General Description ■ High Current Capability The COS2915x/2930x/2950x/2975x are high  COS29152/3: 1.5A current, high accuracy, low dropout voltage  COS29302/3: 3.0A regulators. These regulators feature 350 mV to  COS29502/3: 5.0A 425 mV (full load) typical dropout voltages and  COS29752/3: 7.5A very low ground current. Designed for high ■ Wide Input Voltage Range: 4~36V current loads, these devices also find applica- ■ Low Dropout Voltage tions in lower current, extremely low dropout ■ Low Ground Current critical systems, where their tiny dropout ■ Accurate 2% Tolerance voltage ■ Extremely Fast Transient Response important attributes. ■ Reverse-Battery Protection ■ Error Flag Signals Output The COS2915x/2930x/2950x/2975x are fully Out-of-Regulation protected against overcurrent faults, reversed ■ Adjustable Output Voltage input polarity, reversed lead insertion, over ■ Extended Temperature Ranges temperature From -40°C to +125°C negative transient voltage spikes. Five pin Available in Green TO-220, TO-247 and versions feature logic level ON/OFF control TO-263 Packages (COS29xx2) and an error flag that signals ■ and ground operation, current and values positive are and whenever the output falls out of regulation Applications (COS29xx3). Flagged states include low input voltage (drop out), output current limit, over ■ Automotive Electronics temperature shutdown, and extremely high ■ Battery-Powered Equipment voltage spikes on the input. ■ High-Efficiency Linear Power Supplies ■ High-Efficiency Green Computer Systems The COS2915x/2930x/2950x are available in ■ High-Efficiency Post-Regulator for 5-pin TO-220. The COS2975x 7.5A regulators Switching Supply are available in a 5-pin TO-247 package. Rev1.0 Copyright@2018 Cosine Nanoelectronics Inc. All rights reserved www.cosine-ic.com The information provided here is believed to be accurate and reliable. Cosine Nanoelectronics assumes no reliability for inaccuracies and omissions. Specifications described and contained here are subjected to change without notice on the purpose of improving the design and performance. All of this information described herein should not be implied or granted for any third party. 1 COS2915X/2930X/2950X/2975X 1 Pin Configuration and Functions COS29152/29302/29502/29752 COS29153/29303/29503/29753 Pin Functions Pin No Pin Name I/O 2 IN I INPUT: Supplies the current to the output power device. 4 OUT O OUTPUT: The regulator output voltage. 3 GND - GROUND 1 EN I ENABLE: Available for COS29xx2. CMOS compatible control input. Logic-high=enable, logic-low=shutdown 5 ADJ I ADJUST: Adjustable regulator feedback input that connects to the resistor voltage divider that is placed from OUT to GND in order to set the output voltage. 1 FLG O FLAG: Available for COS29xx3. Active-low error flag output signal that indicates an output fault condition. - Internally connected directly to the device pin3 (GND). The thermal tab must be connected to a copper area on the PCB at the same potential as device pin3 (GND) to assure thermal performance, or leave the thermal tab floating. Do NOT connect the thermal tab to any potential other than the same potential at device pin3. - TAB www.cosine-ic.com Description 2 COS2915X/2930X/2950X/2975X 2 Product Specification 2.1 Absolute Maximum Ratings (1) Parameter Rating Units +36V V - 0.3V to VIN V Storage Temperature Range -55 to 150 °C Operating Junction Temperature Range -40 to 125 °C 2000 V Maximum Input Voltage: VIN Enable Input Voltage ESD Susceptibility, HBM (1) Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. 2.2 Thermal Data Parameter Rating Unit Package Thermal Resistance (Junction-to-case) 2 (TO-220) 2 (TO-263) 1.5 (TO-247) 3 (TO-252) °C/W Rating Unit +4.5V ~ +30V V -40 to +85 °C 2.3 Recommended Operating Conditions Parameter Input Supply Voltage Operating ambient temperature www.cosine-ic.com 3 COS2915X/2930X/2950X/2975X 2.4 Electrical Characteristics (VIN=VOUT +1V, IOUT=10mA, TJ=+25°C, unless otherwise noted) Parameter Output Voltage Symbol VOUT Conditions Min. Typ. Max. Unit IOUT =10mA -1 - +1 % 10mA ≤ IOUT ≤ IFL, (VOUT + 1V) ≤ VIN≤26V -2 - +2 % Line Regulation IOUT=10mA 0.3 0.6 % Load Regulation 10mA≦IOUT≦1.5A 0.2 3 % 20 100 ppm/°C Output Voltage Temperature Coefficient ΔVo/ΔT Dropout Voltage ΔVOUT = -1% Ground Current (VIN = VOUT +1V) Ground Pin Current at Dropout www.cosine-ic.com IGND IGRNDDO COS2915x, IOUT=100mA - 80 200 COS2915x, IOUT=750mA - 220 - COS2915x, IOUT=1.5A - 310 600 COS2930x, IOUT=100mA - 80 175 COS2930x, IOUT=1.5A - 250 - COS2930x, IOUT=3A - 370 600 COS2950x, IOUT=250mA - 125 250 COS2950x, IOUT=2.5A - 250 - COS2950x, IOUT=5A - 370 600 COS2975x, IOUT=250mA - 50 - COS2975x, IOUT=4A - 180 - COS2975x, IOUT=7.5A - 300 COS2915x, IOUT=750mA VIN = VOUT +1V - 5.2 - COS2915x, IOUT=1.5A - 28 - COS2930x, IOUT=1.5A VIN = VOUT +1V - 5.2 - COS2930x, IOUT=3A - 28 - COS2950x, IOUT=2.5A VIN = VOUT +1V - 5.2 - COS2950x, IOUT=5A - 28 - COS2975x, IOUT=4A VIN = VOUT +1V - 5.2 - COS2975x, IOUT=7.5A - 28 - COS2915x, IOUT=10mA - 1.9 - mV mA mA 4 COS2915X/2930X/2950X/2975X (VIN is 0.5V less than specified VOUT) Current Limit ILIM COS2930x, IOUT=10mA - 1.9 - COS2950x, IOUT=10mA - 1.9 - COS2975x, IOUT=10mA - 1.9 - COS2915x, VOUT=0V - 2.1 3.5 COS2930x, VOUT=0V - 4.1 5.0 COS2950x, VOUT=0V - 6.8 10.0 COS2975x, VOUT=0V - 10 15.0 - 5 75 nA - 390 - µVrms - 211 - µVrms Ground Current in Shutdown Output Noise Voltage en CL=10µF, IL=100mA, 10Hz to 100kHz CL=33µF, IL=100mA, 10Hz to 100kHz A Reference Reference Voltage 1.22 1.240 1.252 V Reference Voltage Temperature Coefficient - 20 - ppm/°C Adjust Pin Bias Current - - 100 pA 400 mA Flag Output Output Low Voltage VOL Hysteresis 15 mV ENABLE Input Input Logic Voltage Low (OFF) - - 0.8 V Input Logic Voltage High (ON) 2.4 - - V VEN=0.8V - - 24 pA VEN=26V - - 3 nA - - 18 µA Enable Pin Input Current Regulator Output Current in Shutdown –40°C≤TJ≤ +125°C 3 Application Notes The COS2915x, COS2930x, COS2950x, and COS2975x are high-performance low-dropout voltage regulators suitable for all moderate to high-current voltage regulator applications. Their 350 mV to 425 mV typical dropout voltage at full load make them especially valuable in battery powered systems and as high efficiency noise filters in post-regulator applications. The COS2915x/2930x/2950x/2975x family of regulators are fully protected from damage due to fault conditions. Current limiting is provided. This limiting is linear; output current under overload conditions is constant. Thermal shutdown disables the device when the die temperature exceeds the +125°C maximum safe operating temperature. Line transient protection allows device and load www.cosine-ic.com 5 COS2915X/2930X/2950X/2975X survival even when the input voltage spikes between –20V and +40V. When the input voltage exceeds approximately 36V, the overvoltage sensor disables the regulator. The output structure of these regulators allows voltages in excess of the desired output voltage to be applied without reverse current flow. COS29xx2 versions offer a logic-level ON/OFF control. When disabled, the devices draw nearly zero current. An additional feature of this regulator family is a common pinout. A design’s current requirement may change up or down, but use the same board layout because all of these regulators have identical pinouts. 3.1 Typical Application Circuit Figure 1 Typical Application Circuit *see minimum load current section. On the COS29xx2, the EN (ENABLE) pin may be tied to VIN if it is not required for ON/OFF control. 3.2 Capacitor Requirements For stability and minimum output noise, a capacitor on the regulator output is necessary. The value of this capacitor is dependent upon the output current; lower currents allow smaller capacitors. The COS2915x/2930x/2950x/2975x regulators are stable with the following minimum capacitor values at full load, as noted in Table 4-1. This capacitor need not be an expensive low ESR type: aluminum electrolytics are adequate. In fact, extremely low ESR capacitors may contribute to instability. Tantalum capacitors are recommended for systems where fast load transient response is important where the regulator is powered from a source with high AC impedance, a 0.1μF capacitor connected between Input and GND is recommended. This capacitor should have good characteristics to above 250 kHz. Table 4-1 Minimum capacitor values at full load www.cosine-ic.com Device Full-Load Capacitor COS1915x 10µF COS1930x COS1950x COS1975x 10µF 10µF 22µF 6 COS2915X/2930X/2950X/2975X 3.3 Minimum Load Current The COS2915x–2975x regulators are specified between finite loads. If the output current is too small, leakage currents dominate and the output voltage rises. The following minimum load current swamps any expected leakage current across the operating temperature range, as shown in Table 4-2. Table 4-2 Minimum Load Currents Device Minimum Load COS1915x COS1930x COS1950x COS1975x 5mA 7mA 10mA 10mA 3.4 Adjustable Regulator Design COS29xx2 and COS29xx3, allow programming the output voltage anywhere between 1.25V and the 25V. Two resistors are used. The resistor values are calculated by following equation. R1 = R2 × (VOUT/1.240 – 1) In the equation above, VOUT is the desired output voltage. The typical application circuit in Figure1 shows component definition. Applications with widely varying load currents may scale the resistors to draw the minimum load current required for proper operation (see the Minimum Load Current sub-section). 3.5 Error Flag COS29xx3 versions feature an Error Flag, which looks at the output voltage and signals an error condition when this voltage drops 5% below its expected value. The error flag is an open-collector output that pulls low under fault conditions. It may sink 10 mA. Low output voltage signifies a number of possible problems, including an overcurrent fault (the device is in current-limit) and low input voltage. The flag output is functional during over-temperature shutdown conditions. 3.6 Enable Input COS29xx2 versions feature an enable (EN) input that allows ON/OFF control of the device. Special design allows “zero” current drain when the device is disabled; only microamperes of leakage current flows. The EN input has TTL/CMOS compatible thresholds for simple interfacing with logic, or may be directly tied to ≤30V. www.cosine-ic.com 7