CALIFORNIA MICRO DEVICES CMPWR330 400mA SmartOR Dual Regulator with V AUX Switch handbook
Contents
1. of 70 C W which allows up to 780mW to be safely dissipated 20 30 40 50 60 70 Temperature C Figure 25 V ux Switch Resistance vs T us 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 a Fax 408 263 7846 a www calmicro com 3 6 20012. Voc Select Voltage Vspy or Vaux present Vcc Deselect Voltage Vspy Or Vaux present Hysteresis Voltage Note 2 Vspy or Vaux present Vaux Switch Resistance Vcc Reverse Leakage Vspy Reverse Leakage IRAUX Vaux Reverse Leakage One supply input taken to ground while the others remain at nominal voltage loc Voc Supply Current Voc gt Vocsev Loap OMA Ispy Vspy Supply Current Voc lt Vecpes ILoap OMA laux Vaux Supply Current Vaux is selected _oap OmA IGND Ground Current Vaux is selected Voc sBY OV Vocissy 5V ILoap OMA Vocssy BV ILoap 400mA TpisaB_e Shutdown Temperature Thermal Hysteresis THYST Note 1 At rated load the power dissipation will be 0 68W 1 7V x 0 4A Under these conditions in a 70 C ambient the thermal resistance from junction to ambient 8ja must not exceed 80 C W This is typically achieved with 2 square inches of copper printed circuit board area connected to the GND pins for heat spreading or equivalent Note 2 The disturbance on Vcc during supply changeover should be kept below the hysteresis voltage to prevent any chatter The source resistance on the Vec supply should be kept to less than 0 3Q to ensure precise switching 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 40
3. is enabled and provides a very low impedance connection directly between V and V Vour is the output voltage Power is provided from the regulator or via the low impedance auxiliary switch This output requires a capacitance of 10uF to ensure regula tor stability and minimize the peak output disturbance during power supply changeover GND provides the reference for all voltages INTERFACE SIGNALS Description Standby supply voltage 5V input for regulator whenever Vcc falls below 4 2V Primary supply voltage 5V input for regulator Regulator voltage output 3 3V regulator when either Vcc or Vsyg is present Auxiliary supply voltage 3 3V input for low impedance switch Reference for all voltages Simplified Electrical Schematic 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 a Fax 408 263 7846 a www calmicro com 3 6 2001 PX cients MICRO DEVICES CMPWR330 Typical DC Characteristics nominal conditions unless specified otherwise T T E E z z g g 5 5 oO oO gt gt a a Qa Qa 3 gt N N 0 1 2 3 4 5 6 Vcc Input Voltage V Vspy Input Voltage V Figure 1 V o Supply Current vs Voltage Figure 2 V sy Supply Current vs Voltage T T E E 5 5 oO oO 2 E Q 3 8 0 0 700 200 300 400 Vaux Input Voltage V Load Current mA Figure 3 V ux S
4. 2001 AN cairon MICRO DEVICES CMPWR330 Typical Transient Characteristics Supply source resistance set to 0 20 Tek Run 25kS s Sample Tek BJJ 25kS s 1 Acqs E rad H fee Veer on Chi 1V Mr 1v M2ms Ch2 4 48V Chi 1V w M2ms Ch2 1 44V Figure 11 V Cold Start Load 400mA Figure 12 V Full Power Down Load 400mA Tek Run 25kS s Sample Tek Run 25kS s Sample Chi 1V 1V M2ms Chis 1 02V Chi 1V 1V M2ms Ch2 3 56V Figure 13 V_sy Cold Start Load 400mA Figure 14 V Full Power Down Load 400mA Tek Run 25kS s_ Sample Tek Run 25kS s_ Sample Vout Chi 1V 1V M2ms Chis 1 26V Chi 1V aB 1v M2ms Chit 2 60V Figure 15 V Cold Start Load 400mA Figure 16 V x Full Power Down Load 400mA 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 A Fax 408 263 7846 a www calmicro com 3 6 2001 AN canion MICRO DEVICES CMPWR330 Typical Transient Characteristics V o source resistance set to 0 20 Tek Run 2 5MS s Sample Tek Run 2 5MS s Sample F j Vgpy offset 5V Vspy offset 5V Neg offset 4 5V P rr T ded Chi 100mV kiioomV M20ps Ch2y 4 46V Chi toomv A o0mY Mops Choi 432V Ch3 100mV Ch3 100mV Figure 17 V o Power Up Vey 5V Load 300mA Figure 18 V Power Down V 5V Load 300mA SBY SBY Tek Run 2 5MS s Sa
5. 8 263 3214 a Fax 408 263 7846 a www calmicro com 3 6 2001 Pr ciicontis MICRO DEVICES CMPWR330 Interface Signals Voc iS a positive input supply for the voltage regulator Whenever this supply voltage exceeds the V_ level 4 4V it will immediately be given priority and be used to power the regulator output If this supply voltage falls below the V ones level 4 2V it will immediately be deselected and no longer provide power for the regula tor output An internal hysteresis voltage of 0 2V is used to prevent any chatter during selection and deselection of Voc The effective source impedance of V should be kept below 0 3Q to ensure changeover disturbances do not exceed the hysteresis level If the connection to Vis made within a few inches of the main input filter a bypass capacitor may not be necessary Otherwise a bypass filter capacitor in the range of 1pF to 10pF will ensure adequate filtering Vev is the standby input supply 5V which is immedi ately used to power the regulator output whenever Vog is below the deselect level 4 2V If the V connection is made within a few inches of the main input filter a bypass capacitor may not be neces sary Otherwise a bypass filter capacitor in the range of 1uF to 10uF will ensure adequate filtering Vaux IS the auxiliary voltage power source This supply is selected only when V_ falls below 4 2V and the V is not present Under these conditions an internal switch
6. AHC M PW R330 4 A A CALIFORNIA MICRO DEVICES CMPWR330 400mA SmartOR Dual Regulator with V ux Switch Features e Continuous 3 3V output from three inputs Complete power management solution Voc e Built in hysteresis when selecting input supplies 0 25Q TYP Vopy regulator supplies 400mA output e Integrated switch has very low Rogon Foldback current limiting protection Thermal overload shutdown protection e 8 pin power SOIC package Product Description The CMPWR330 is a dual input regulator with a fully integrated V ux switch capable of delivering up to 400mA continuously at 3 3V The output power is provided from three independent input voltage sources on a prioritized basis Power is always taken in priority using the following order Vse Vsgy and Vaux When V_ 5V or Va is present the device automati cally enables the regulator and produces a stable 3 3V output at Vaur CC Applications e PCI adapter cards with Wake On LAN e Network Interface Cards NICs e Multiple power systems e Systems with standby capabilities When only V 3 3V is present the device provides a low impedance direct connection 0 250 TYP from V ux to Vout All the necessary control circuitry needed to provide a smooth and automatic transition between all three supplies has been incorporated This allows the Ve input supply to be dynamically switched without loss of output voltage PIN DIAGRAM AND ELECTRIC
7. AL SCHEMATIC Top View CMPWR330 8 Pin Power SOIC Pin Diagram Typical Application Circuit STANDARD PART ORDERING INFORMATION Package Ordering Part Number Pins Style Tubes Tape amp Reel Part Marking 8 Power SOIC CMPWR330SA T CMPWR330SA R 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 A Fax 408 263 7846 a www calmicro com 3 6 2001 CMPWR330SA C1680101 1 AN cairon MICRO DEVICES CMPWR330 ABSOLUTE MAXIMUM RATINGS Parameter Rating ESD Protection HBM 2000 Vcc Vssy Input Voltage Vaux Input Voltage 6 0 GND 0 5 4 0 GND 0 5 emperature Storage Operating Ambient 40 to 150 0 to 70 Operating Junction O to 125 Power Dissipation Note 1 Internally Limited OPERATING CONDITIONS Parameter Range Vcc Vspy 5 0 25 Vaux 3 3 0 3 Temperature Ambient O to 70 Load Current ELECTRICAL OPERATING CHARACTERISTICS over operating conditions unless specified otherwise Parameter O to 400 10 20 Conditions Regulator Output Voltage OmA lt ILoaD lt 400mA Regulator Current Limit Short Circuit Current Vecsey 5V Vout OV Load Regulation Vec 5V LOAD 5 to 400mA Line Regulation Voc 4 5V to 55V ILoaD 5mA
8. Temperature C The CMPWR330 uses a thermally enhanced package Figure 23 V u Variation with T where all the GND pins 5 through 8 are integral to the leadframe When this package is mounted on a double 400mA Load AMB sided printed circuit board with two square inches of 4 55 copper allocated for heat spreading the resulting 0 is 50 C W 4 50 Vestecr t e Based on a maximum power dissipation of 0 7W S 445 1 75V x 0 4A with an ambient of 70 C the resulting g junction temperature will be 4 40 gt 3 Tyune Tame Pp Oja 2 99 o E 430 voEsELECT 70 C 0 7W 50 C W Zz 4 25 70 C 35 C 105 C 4 20 i 25 50 75 100 125 150 Thermal characteristics were measured using a double Temperature C sided board with two square inches of copper area Figure 24 Select Deselect Threshold Variation withT nc connected to the GND pins for heat spreading Measurements showing performance up to junction temperature of 125 C were performed under light load conditions 5mA This allows the ambient temperature to be representative of the internal junction temperature Note The use of multi layer board construction with S separate ground and power planes will further enhance 3 the overall thermal performance In the event of no S copper area being dedicated for heat spreading a multi f layer board construction using only the minimum size fo pad layout will typically provide the CMPWR330 with an overall
9. mple Tek Run 2 5MS s Sample R holt heete T fe Vec offset 4 5V r E EEE 1 SR ee eee ee ae ETTE Vout offset 3 3V babobobe bbb Chi 100mV ead 100mv M20us Ch2s 4 44V Chi 100mV eyJ100mV M20yus Ch2X 4 31V Figure 19 V o Power Up V 3 3V Load 300mA Figure 20 V o Power Down V AUX 3 3V Load 300mA Tek GH 10MS s 2 Acqs Tek Run 500kS s Sample om fe cere Vout offset 3 3V Chi 50mV ei 2V M5uyus Ch3 X 3 50V fin 20mV Ch2 500mV M100us Chay 5V Figure 21 Load Transient Response 10 90 Rated Figure 22 Line Transient 1V Response 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 A Fax 408 263 7846 a www calmicro com 3 6 2001 7 AN cairon MICRO DEVICES CMPWR330 Typical Thermal Characteristics The overall junction to ambient thermal resistance 0 for device power dissipation P consists primarily of two paths in series The first path is the junction to the case 0 which is defined by the package style and the second path is case to ambient 0 thermal resistance which is dependent on board layout The final operating junction temperature for any set of conditions can be estimated by the following thermal equation Regulator Output Voltage V Tune Tame Pp jc P5 Oca 20 30 40 50 60 70 Tame Po Oy
10. upply Current vs Voltage Figure 4 Ground Current vs Output Load 3 4 f H oe ih Si pees ees ae H H H Bi bbe ee ee ee a ae aa 6 cee a E i H i i E ae N en Pe ENEE EA We aaa eas Ge eee as ean i e H H i H c 3 0 3 5 4 4 5 5 5 5 6 ae 3 22 Line Voltage V Line Voltage V Figure 5 Line Regulation 5mA Load Figure 6 Line Regulation 400mA Load 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 A Fax 408 263 7846 a www calmicro com 3 6 2001 Preiser MICRO DEVICES CMPWR330 Typical DC Characteristics 3 45 3 40 Regulator Output Voltage V o o 0 100 200 300 400 500 600 Load Current mA Figure 7 Load Regulation 5V Supply Dropout Voltage V 0 100 200 300 400 Load Current mA Figure 9 Regulator Dropout Characteristics 2001 California Micro Devices Corp All rights reserved Smart OR is a trademark of California Micro Devices Regulator Output Voltage V 0 100 200 300 400 500 600 Output Current mA Figure 8 Foldback Current Limit Protection 0 40 0 35 0 30 ON Resisitance Q 0 25 0 20 i i i i 3 0 3 1 3 2 3 3 3 4 3 5 3 6 Vaux INPUT VOLTAGE V Figure 10 Switch Resistance vs V yx Supply 215 Topaz Street Milpitas California 95035 a Tel 408 263 3214 A Fax 408 263 7846 a www calmicro com 3 6
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CALIFORNIA MICRO DEVICES CMPWR330 400mA SmartOR Dual Regulator with V AUX Switch handbook