CMPWR150SF

ON Semiconductor Is Now To learn more about onsemi™, please visit our website at www.onsemi.com onsemi and       and other names, marks, and brands are registered and/or common law trademarks of Semiconductor Components Industries, LLC dba “onsemi” or its affiliates and/or subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes at any time to any products or information herein, without notice. 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Should Buyer purchase or use onsemi products for any such unintended or unauthorized application, Buyer shall indemnify and hold onsemi and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that onsemi was negligent regarding the design or manufacture of the part. onsemi is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. Other names and brands may be claimed as the property of others. CMPWR150 500 mA/3.3 V SmartORt Power Regulator Product Description The CMPWR150 is a low dropout regulator that delivers up to 500 mA of load current at a fixed 3.3 V output. An internal threshold level (typically 4.1 V) is used to prevent the regulator from being operated below dropout voltage. The device continuously monitors the input supply and will automatically disable the regulator when VCC falls below the threshold level. When the regulator is disabled, the control signal “Drive” (Active Low) is enabled, which allows an external PMOS switch to power the load from an auxiliary 3.3 V supply. When VCC is restored to a level above the select threshold, the control signal for the external PMOS switch is disabled and the regulator is once again enabled. All the necessary control circuitry needed to provide a smooth and automatic transition between the supplies has been incorporated. This allows VCC to be dynamically switched without loss of output voltage. The CMPWR150 is housed in an 8−pin SOIC thermally enhanced package which is ideal for space critical applications. The CMPWR150 is available with RoHS compliant lead−free finishing. Features • • • • • • • • • SIOC 8 SF SUFFIX CASE 751BD MARKING DIAGRAM CMPWR150SF CMPWR150SF = Specific Device Code Automatic Detection of VCC Input Supply Drive Output Logic to Control External Switch Glitch−Free Output During Supply Transitions 500 mA Output Maximum Load Current Built−In Hysteresis During Supply Selection Controller Operates from Either VCC or VOUT 8−Pin Power SOIC Thermal Package These Devices are Pb−Free and are RoHS Compliant ORDERING INFORMATION Device Package Shipping† CMPWR150SF SOIC (Pb−Free) 2500/Tape & Reel †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. Applications • • • • • http://onsemi.com PCI Adapter Cards Network Interface Cards (NICs) Dual Power Systems Systems with Standby Capabilities USB Powered Devices Such as Printers, Scanners, MP3 Players and Zip Drives See Application Note AP−211 © Semiconductor Components Industries, LLC, 2011 April, 2011 − Rev. 4 1 Publication Order Number: CMPWR150/D CMPWR150 TYPICAL APPLICATION CIRCUIT SIMPLIFIED ELECTRICAL SCHEMATIC 3.3 V VAUX VCC + FDN338P (Si2310DS) − + Deselect 5V − Drive - CMPWR150 VCC + Controller VCC + CIN 1 mF 4.1 V Drive GND VOUT GND + COUT VOUT 3.3 V/500 mA + VREF 3.3 V En RegAmp VOUT 3.3 V/500 mA 10 mF PACKAGE / PINOUT DIAGRAM Top View N.C. 1 8 GND VCC 2 7 GND VOUT 3 6 GND DRIVE 4 5 GND 8−Pin SOIC CMPWR150 Table 1. PIN DESCRIPTIONS Pin(s) Name Description 1 N.C. This is a no−connect pin. 2 VCC VCC is the power source for the internal regulator and is monitored continuously by an internal controller circuit. Whenever VCC exceeds VCCSEL (4.35 V typically), the internal regulator (500 mA max) will be enabled and deliver a fixed 3.3 V at VOUT. When VCC falls below VCCDES (4.10 V typically) the regulator will be disabled. Internal loading on this pin is typically 1.0 mA when the regulator is enabled, which decreases to 0.15 mA whenever the regulator is disabled. If VCC falls below the voltage on the VOUT pin the VCC loading will further decrease to only a few microamperes. During a VCC power up sequence, there will be an effective step increase in VCC line current when the regulator is enabled. The amplitude of this step increase will depend on the DC load current and any necessary current required for charging/discharging the load capacitance. This line current transient will cause a voltage disturbance at the VCC pin. The magnitude of the disturbance will be directly proportional to the effective power supply source impedance being delivered to the VCC input. To prevent chatter during Select and Deselect transitions, a built−in hysteresis voltage of 250 mV has been incorporated. It is recommended that the power supply connected to the VCC input have a source resistance of less than 0.25 W to minimize the event of chatter during the enabling/disabling of the regulator. An input filter capacitor in close proximity to the VCC pin will reduce the effective source impedance and help minimize any disturbances. If the VCC pin is within a few inches of the main input filter, a capacitor may not be necessary. Otherwise an input filter capacitor in the range of 1 mF to 10 mF will ensure adequate filtering. 3 VOUT VOUT is the regulator output voltage connection used to power the load. An output capacitor of ten microfarads is used to provide the necessary phase compensation, thereby preventing oscillation. The capacitor also helps to minimize the peak output disturbance during power supply changeover. When VCC falls below VOUT, then VOUT will be used to provide the necessary quiescent current for the internal reference circuits. This ensures excellent start−up characteristics for the regulator. 4 DRIVE 5−8 GND DRIVE is an active LOW logic output intended to be used as the control signal for driving an external PFET whenever the regulator is disabled. This will allow the voltage at VOUT to be powered from an auxiliary supply voltage (3.3 V). The Drive pin is pulled HIGH to VCC whenever the regulator is enabled. This ensures that the auxiliary remains isolated during normal regulator operation. GND is the negative reference for all voltages. The current that flows in the ground connection is very low (typically 1.0 mA) and has minimal variation over all load conditions. http://onsemi.com 2 CMPWR150 SPECIFICATIONS Table 2. ABSOLUTE MAXIMUM RATINGS Parameter ESD Protection (HBM) Pin Voltages VCC DRIVE Rating Units ±2000 V [GND − 0.5] to [+6.0] [GND − 0.5] to [VCC + 0.5] Storage Temperature Range −40 to +150 Operating Temperature Range Ambient Junction 0 to +70 0 to +125 Power Dissipation SOIC (Note 1) 1.0 V °C °C W Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. 1. The SOIC package used is thermally enhanced through the use of a fused integral leadframe. The power rating is based on a printed circuit board heat spreading capability equivalent to 2 square inches of copper connected to the GND pins. Typical multi−layer boards using power plane construction will provide this heat spreading ability without the need for additional dedicated copper area. (Please consult factory for thermal evaluation assistance.) Table 3. STANDARD OPERATING CONDITIONS Parameter VCC Input Voltage Rating Units 4.5 to 5.5 V Ambient Operating Temperature Range 0 to +70 °C Load Current 0 to 500 mA CEXT 10 ±10% mF http://onsemi.com 3 CMPWR150 SPECIFICATIONS (Cont’d) Table 4. ELECTRICAL OPERATING CHARACTERISTICS (Note 2) Symbol Parameter VOUT Regulator Output Voltage IOUT Regulator Output Current Conditions 0 mA < ILOAD < 500 mA Min Typ Max Units 3.135 3.300 3.465 V 500 800 VCCSEL Select Voltage Regulator Enabled VCCDES Deselect Voltage Regulator Disabled 4.10 V VCCHYST Hysteresis Voltage Hysteresis (Note 3) 0.25 V Short−Circuit Output Current VCC = 5 V, VOUT = 0 V 1200 mA VCC Pin Reverse Leakage VOUT = 3.3 V, VCC = 0.0 V 5 VR LOAD Load Regulation VCC = 5 V, ILOAD = 50 to 500 mA 75 mV VR LINE Line Regulation VCC = 4.5 to 5.5 V, ILOAD = 5 mA 2 mV Quiescent Supply Current VCC > VCCDES, ILOAD = 0 mA VCCDES > VCC > VOUT VOUT > VCC 1.0 0.15 0.01 3.0 0.25 0.02 mA IGND Ground Pin Current Regulator Disabled (Note 4) VCC = 5 V, ILOAD = 5 mA (Note 4) VCC = 5 V, ILOAD = 500 mA (Note 4) 0.15 1.0 1.2 0.30 2.5 3.0 mA ROH DRIVE Pull−up Resistance RPULLUP to VCC, VCC > VCCSEL 100 400 W ROL DRIVE Pull−down Resistance RPULLDOWN to GND, VCCDES > VCC 200 400 W TDH Drive High Delay CDRIVE = 1 nF, VCC TRISE < 100 ns 1.0 mS TDL Drive Low Delay CDRIVE = 1 nF, VCC TFALL < 100 ns 0.2 mS ISC IRCC ICC 4.35 mA 3.90 4.45 50 V mA 2. Operating Characteristics are over Standard Operating Conditions unless otherwise specified. 3. The hysteresis defines the maximum level of acceptable disturbance on VCC during switching. It is recommended that the VCC source impedance be kept below 0.25 W to ensure the switching disturbance remains below the hysteresis during select/deselect transitions. An input capacitor may be required to help minimize the switching transient. 4. Ground pin current consists of controller current (0.15 mA) and regulator current if enabled. The controller always draws 0.15 mA from either VCC or VOUT, whichever is greater. All regulator current is supplied exclusively from VCC. At high load currents a small increase occurs due to current limit protection circuitry. http://onsemi.com 4 CMPWR150 TYPICAL DC CHARACTERISTICS Ground Current is shown across the entire range of load conditions in Ground Current. The ground current has minimal variation across the range of load conditions and shows only a slight increase at maximum load. This slight increase at rated load is due to the current limit protection circuitry becoming active. Unless stated otherwise, all DC characteristics were measured at room temperature with a nominal VCC supply voltage of 5.0 V and an output capacitance of 10 mF. The external PMOS switch was present and resistive load conditions were used. The test data shown here was obtained from engineering samples. The device was modified to allow the regulator to function below the dropout threshold for the purpose of obtaining test data. During normal operation, production parts will shutdown the regulator below a 4.1 V supply. Dropout Characteristics of the regulator are shown in Dropout Characteristics. At maximum rated load conditions (500 mA), a 100 mV drop in regulation occurs when the line voltage collapses below 4.1 V. For light load conditions (50 mA), regulation is maintained for line voltages as low as 3.5 V In normal operation, the regulator is deselected at 4.1 V, which ensures a regulation output droop of less than 100 mV is maintained. Figure 3. Ground Current VCC Supply Current of the device is shown across the entire VCC range for both VAUX present (3.3 V) and absent (0 V) in V In the absence of VAUX, the supply current remains fixed at approximately 0.15 mA until VCC reaches the Select voltage threshold of 4.35 V. At this point the regulator is enabled and a supply current of 1.0 mA is conducted. When VAUX is present, the VCC supply current is less than 10 mA until VCC exceeds VAUX, at which point VCC then powers the controller (0.15 mA). When VCC reaches VSELECT, the regulator is enabled. Figure 1. Dropout Characteristics Load Regulation performance is shown from zero to maximum rated load in Load Regulation. A change in load from 10% to 100% of rated, results in an output voltage change of less than 75 mV. This translates into an effective output impedance of approximately 0.15 W. Figure 4. VCC Supply Current (No Lead) Figure 2. Load Regulation http://onsemi.com 5 CMPWR150 TYPICAL TRANSIENT CHARACTERISTICS The transient characterization test set−up shown below includes the effective source impedance of the VCC supply (RS). This was measured to be approximately 0.2 W. It is recommended that this effective source impedance be no greater than 0.25 W to ensure precise switching is maintained during VCC selection and deselection. Both the rise and fall times during VCC power−up/down sequencing were controlled at a 20 millisecond duration. This is considered to represent worst case conditions for most application circuits. A maximum rated load current of 500 mA was used during characterization, unless specified otherwise. During a selection or deselection transition, the DC load current is switching from VAUX to VCC and vice versa. In addition to the normal load current, there may also be an in−rush current for charging/discharging the load capacitor. The total current pulse being applied to either VAUX or VCC is equal to the sum of the DC load and the corresponding in−rush current. Transient currents in excess of 1.0 amps can readily occur for brief intervals when either supply commences to power the load. The oscilloscope traces of VCC power−up/down show the full bandwidth response at the VCC and VOUT pins under full load (500 mA) conditions. See Application Note AP−211 for more information. VCC Power−up Cold Start. Figure 5 shows the output response during an initial VCC power−up with VAUX not VAUX TR = 20 ms TF = 20 ms Figure 5. VCC Power−up Cold Start Si2301DS 3.3 V RS VCC +5 V present. When VCC reaches the select threshold, the regulator turns on. The uncharged output capacitor causes maximum in−rush current to flow, resulting in a large voltage disturbance at the VCC pin of about 230 mV. The built−in hysteresis of 250 mV ensures the regulator remains enabled throughout the transient. Prior to VCC reaching an acceptable logic supply level (2 V), a disturbance on the Drive pin can be observed. VCC 0.2 W + C1 10 mF Drive VOUT C2 0.1 mF GND VOUT C3 + C4 0.1 mF GND Figure 6. Transient Characteristics Test Set−Up http://onsemi.com 6 10 mF (500 mA) 6.6 W CMPWR150 VCC Power−up (VAUX = 3.3 V). Figure 7 shows the output response as VCC approaches the select threshold during a power−up when VAUX is present (3.3 V). The output capacitor is already fully charged. When VCC reaches the select threshold, the in−rush current is minimal and the VCC disturbance is only 130 mV. The built−in hysteresis of 250 mV ensures the regulator remains enabled throughout the transient. during a power−down transition. VAUX of 3.3 V remains present. When VCC reaches the deselect threshold (4.1 V), the regulator turns off. This causes a step change reduction in VCC current resulting in a small voltage increase at the VCC input. This disturbance is approximately 100 mV and the built−in hysteresis of 250 mV ensures the regulator remains disabled throughout the transient. The output voltage experiences a disturbance of approximately 100 mV during the transition. VOUT offset = 3.3 V, VCC offset = 4.3 V VOUT offset = 3.3 V, VCC offset = 4.3 V Figure 7. VCC Power−up (VAUX = 3.3 V) Figure 9. VCC Power−down (VAUX = 3.3 V) VCC Power−up (VAUX =3.0 V). Figure 8 shows the output response as VCC approaches the select threshold during power−up. The auxiliary voltage, VAUX is set to a low level of 3.0 V. When VCC reaches the select threshold, a modest level of in−rush current is required to further charge the output capacitor resulting in VCC disturbance of 200 mV. The built−in hysteresis of 250 mV ensures the regulator remains enabled throughout the transient. Load Step Response. Figure 10 shows the output response of the regulator during a step load change from 5 mA to 500 mA (represented on Ch1). An initial transient overshoot of 50 mV occurs and the output settles to its final voltage within a few microseconds. The dc voltage disturbance on the output is approximately 75 mV, which demonstrates the regulator output impedance of 0.15 W. VOUT offset = 3.3 V VOUT offset = 3.3 V, VCC offset = 4.3 V Figure 10. Load Step Response Figure 8. VCC Power−up (VAUX = 3.0 V) VCC Power−down (VAUX = 3.3V). Figure 9 shows the output response as VCC approaches the deselect threshold http://onsemi.com 7 CMPWR150 Line Step Response. Figure 11 shows the output response of the regulator to a VCC line voltage transient between 4.5 V and 5.5 V (1 Vpp as shown on Ch1). The load condition during this test is 5 mA. The output response produces less than 10 mV of disturbance on both edges indicating a line rejection of better than 40 dB at high frequencies. VOUT offset = 3.3 V Figure 11. Line Step Response TYPICAL THERMAL CHARACTERISTICS Output Voltage vs. Temperature. Figure 12 shows the regulator VOUT performance up to the maximum rated junction temperature. The overall 100°C variation in junction temperature causes an output voltage change of about 30 mV, reflecting a voltage temperature coefficient of 90 ppm/°C. Output Voltage (500 mA) vs. Temperature. Figure 13 shows the regulator steady state performance when fully loaded (500 mA) in an ambient temperature up to the rated maximum of 70°C. The output variation at maximum load is approximately 25 mV across the normal temperature range. Thermal dissipation of junction heat consists primarily of two paths in series. The first path is the junction to the case (qJC) thermal resistance, which is defined by the package style, and the second path is the case to ambient (qCA) thermal resistance, which is dependent on board layout. For a given package style and board layout, the operating junction temperature is a function of junction power dissipation PJUNC and the ambient temperature, resulting in the following thermal equation: T JUNC + T AMB ) T JUNC(q JC) ) P JUNC(q CA) Measurements showing performance up to maximum junction temperature of 125°C were performed under light load conditions (5 mA). This allows the ambient temperature to be representative of the internal junction temperature. Figure 13. Output Voltage (500 mA) vs. Temperature Figure 12. Output Voltage vs. Temperature http://onsemi.com 8 CMPWR150 Thresholds vs. Temperature. Figure 14 shows the regulator select/deselect threshold variation up to the maximum rated junction temperature. The overall 100°C change in junction temperature causes a 30 mV variation in the select threshold voltage (regulator enable). The deselect threshold level varies about 50 mV over the 100°C change in junction temperature. This results in the built−in hysteresis having minimal variation over the entire operating junction temperature range. Figure 14. Threshold vs. Temperature http://onsemi.com 9 CMPWR150 PACKAGE DIMENSIONS SOIC 8, 150 mils CASE 751BD−01 ISSUE O E1 E SYMBOL MIN A 1.35 1.75 A1 0.10 0.25 b 0.33 0.51 c 0.19 0.25 D 4.80 5.00 E 5.80 6.20 E1 3.80 4.00 MAX 1.27 BSC e PIN # 1 IDENTIFICATION NOM h 0.25 0.50 L 0.40 1.27 θ 0º 8º TOP VIEW D h A1 θ A c e b L SIDE VIEW END VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-012. SmartOR is a trademark of Semiconductor Components Industries, LLC (SCILLC). ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81−3−5773−3850 http://onsemi.com 10 ON Semiconductor Website: www.onsemi.com Order Literature: http://www.onsemi.com/orderlit For additional information, please contact your local Sales Representative CMPWR150/D