PD - 94771 Ultra Low Dropout, 10A Adjustable Positive Linear Regulator Surface Mount (SMD-6C) OM7581SM 5962 - 0323702MXA Product Summary Part Number Output Voltage Current Dropout OM7581SM +1.8V to +5.5V 10A 0.66V SMD-6C 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. 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 Symbol Value Units A IO 10 Power Input Voltage VPWR 6.0 Control Input Voltage VCTRL 13 PD 20 W RθJC 5.0 °C/W TJ -55 to +125 TSTG TL -65 to +150 Output Currrent Power Dissipation @ Tc = 25°C Thermal Resistance, Junction to Case Operating Junction Temperature Range Storage Temperature Range Lead Temperature Soldering (10second maximum) www.irf.com V °C 300 1 12/03/03 OM7581SM Electrical Characteristics @TA = 25°C (Unless Otherwise Specified) Parameter Test Conditions Min. Typ. Max. Units Reference Voltage VCTRL = 2.7V, VPWR = 2.0V, ILOAD = 10mA 1.243 1.250 1.257 VADJ= 0V VCTRL=2.7 to 12V, VPWR=1.75V to 5.5V, ILOAD =10mA to 10A Q 1.237 1.250 1.263 Line Regulation Load Regulation VCTRL = 2.5 to 12V, VPWR = 3.0V to 5.5V, ILOAD = 1.0mA Q -- 1.0 3.0 VCTRL = 2.75V, VPWR = 2.75V, ILOAD = 10mA to 10A Q -- 1.0 10 10 Minimum Load Current VCTRL = 5.0V, VPWR = 3.3V, VADJ= 0V QR V mV -- 3.0 VCTRL = 5.0V, VPWR = 3.3V, ILOAD = 0mA Q -- 6.0 10 Control Pin Current SVCTRL= 2.75V, VPWR= 2.75V, ILOAD= 10A Q -- -- 170 VCTRL= 2.75V, VPWR = 2.05V, ILOAD = 10mA -- 50 120 µA VCTRL = VPWR = 5.0V (AVG), VRIPPLE = 1.0VP-P, f= 120Hz 60 80 -- dB 10.1 11 -- VCTRL=2.75V, VPWR=2.75V, ∆VOUT=100mV, TJ=-55°C & TJ=+125°C 10.1 -- -- Ground Pin Current Adjust Pin Current mA VADJ= 0V Ripple Rejection Current Limit Minimum VCONTROL Minimum VPWR Thermal Regulation IOUT = 4.0A TJ = 25°C VCTRL= 2.75V, VPWR= 2.75V, ∆VOUT = 100mV, TJ = 25°C VPWR = 3.3V, ILOAD = 10A Q -- -- 1.35 VCTRL = 2.75V, ILOAD = 10A, TJ = 25°C -- -- 0.66 VCTRL = 2.75V, ILOAD = 10A, TJ = 125°C -- -- 0.85 VCTRL = 2.75V, ILOAD =10A, TJ = -55°C -- -- 0.85 VPWR = 5.0V, IO = 10A, PD ≥ 20W, pulse width = 30ms -- -- 0.02 A V %/W Dropout is caused by either minimum control voltage or minimum power voltage. Both Dropout Voltage 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 V POWER Sense Pin1 V OUT 220uF 1uF ( x5 ) Pin3 0.1uF OM7581 0.1uF 5V Pin4 V CONTROL 22uF 330uF R1 ADJ VOUT = 1.25V(1 + (R2/R1)) + IADJ(R2) IADJ = 50uA @ 25°C 1uF ( x5 ) Pin2 0.1uF 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: 330µF Tantalum Low ESR, 220µF Electrolytic, 22µF Electrolytic Case Outline and Dimensions — SMD-6C Pin Assignment 6 1 5 2 4 3 Pin # Pin Description 1 ADJUST 2 N/C 3 4 SENSE VCTRL 5 VOUT 6 VPWR Part Numbering Nomenclature OM 7581 S M X Omnirel Device S=Isolated Package 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