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| PD - 94771 Ultra Low Dropout, 10A Adjustable Positive Linear Regulator Surface Mount (SMD-6C) Product Summary Part Number OM7581SM OM7581SM 5962 - 0323702MXA Output Voltage +1.8V to +5.5V Current 10A Dropout 0.66V Description The OM7581SM is a 10A, ultra low dropout, adjustable linear regulator specifically designed for low voltage, high current applications. Housed in a hermetic package, the dropout of this device is 660mV at full load and as low a 100mV at light loads. The low dropout is achieved by an additional low current input voltage. This unit is ideally suited for military/defense, commercial aircraft, industrial control and other harsh environments where a hermetically sealed package is required. SMD-6C Features: Dropout Voltage of 660mV at Full Load Dropout Voltage of 100mV at Light Loads Fast Transient Response Adjustable Output: 1.8 to 5.5V Remote Sense Hermetic SMD-6C Package ensures High Reliability Absolute Maximum Ratings Parameter Output Currrent Power Input Voltage Control Input Voltage Power Dissipation @ Tc = 25C Thermal Resistance, Junction to Case Operating Junction Temperature Range Storage Temperature Range Lead Temperature Soldering (10second maximum) Symbol IO VPWR VCTRL PD RJC TJ TSTG TL Value 10 6.0 13 20 5.0 -55 to +125 -65 to +150 300 Units A V W C/W C www.irf.com 1 12/03/03 OM7581SM Electrical Characteristics @TA = 25C (Unless Otherwise Specified) Parameter Reference Voltage VADJ= 0V Line Regulation Load Regulation Ground Pin Current Adjust Pin Current VADJ= 0V Ripple Rejection Current Limit Minimum VCONTROL Minimum VPWR Thermal Regulation Dropout Voltage VCTRL = VPWR = 5.0V (AVG), VRIPPLE = 1.0VP-P, f= 120Hz IOUT = 4.0A TJ = 25C VCTRL= 2.75V, VPWR= 2.75V, VOUT = 100mV, TJ = 25C VPWR = 3.3V, ILOAD = 10A Q VCTRL = 2.75V, ILOAD = 10A, TJ = 25C VCTRL = 2.75V, ILOAD = 10A, TJ = 125C VCTRL = 2.75V, ILOAD =10A, TJ = -55C VPWR = 5.0V, IO = 10A, PD 20W, pulse width = 30ms 10.1 11 --------1.35 0.66 0.85 0.85 0.02 %/W V VCTRL=2.75V, VPWR=2.75V, VOUT=100mV, TJ=-55C & TJ=+125C 10.1 -----A 60 80 -dB Test Conditions VCTRL = 2.7V, VPWR = 2.0V, ILOAD = 10mA VCTRL=2.7 to 12V, VPWR=1.75V to 5.5V, ILOAD =10mA to 10A Q VCTRL = 2.5 to 12V, VPWR = 3.0V to 5.5V, ILOAD = 1.0mA Q VCTRL = 2.75V, VPWR = 2.75V, ILOAD = 10mA to 10A Q VCTRL = 5.0V, VPWR = 3.3V, ILOAD = 0mA Q VCTRL= 2.75V, VPWR = 2.05V, ILOAD = 10mA Min. Typ. Max. Units 1.243 1.250 1.257 1.237 1.250 1.263 ------1.0 1.0 3.0 6.0 -50 3.0 10 10 10 170 120 A mA V mV Minimum Load Current VCTRL = 5.0V, VPWR = 3.3V, VADJ= 0V QR V Control Pin Current S CTRL= 2.75V, VPWR= 2.75V, ILOAD= 10A Q Dropout is caused by either minimum control voltage or minimum power voltage. Both parameters are specified with respect to the output voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation. Footnotes Q- Denotes specifications which apply over the full operating temperature range. R- The minimum load current is minimum current required to maintain regulation. Normally the current in the resistor divider used to set the output voltage is selected to meet the minimum load current requirement. S- The control pin current is the drive current required for the output transistor. The control pin current is approximately 0.01% output current. The minimum value is equal to quiescent current of the device. 2 www.irf.com OM7581SM Fig 1: Typical Power Voltage Vs Output Current Fig 2: Typical Control Voltage Vs Output Current Fig 3: Typical Reference Voltage Vs Temperature www.irf.com 3 OM7581SM 3.3V Pin5 220uF 1uF ( x5 ) 0.1uF VPOWER Sense VOUT Pin1 Pin3 0.1uF 1uF ( x5 ) 330uF OM7581 5V VCONTROL ADJ Pin4 22uF 0.1uF R1 Pin2 VOUT = 1.25V(1 + (R2/R1)) + IADJ(R2) IADJ = 50uA @ 25C R2 Fig 5: Typical Application Layout Consideration It is recommended that output capacitors be located as close as possible to the VOUT terminal of the device to prevent any high frequency oscillation that may result due to excessive stray inductance. Specfications for capacitors: 330F Tantalum Low ESR, 220F Electrolytic, 22F Electrolytic Case Outline and Dimensions -- SMD-6C Pin Assignment Pin # Pin Description ADJUST N/C SENSE VCTRL VOUT VPWR 1 2 3 4 5 6 6 1 5 2 4 3 Part Numbering Nomenclature OM Omnirel 7581 Device S S=Isolated M Package X Screening WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, Tel: (310) 252-7105 IR LEOMINSTER: 205 Crawford St., Leominster, Massachusetts 01453, Tel: (978) 534-5776 Data and specifications subject to change without notice. 12/03 4 www.irf.com |
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