mic5332 evaluation board micro-power high performance dual 300ma uldo? uldo is a trademark of micrel, inc. mlf and micro leadframe are registered trademarks of amkor technology, inc. micrel inc. 2180 fortune drive san jose, ca 95131 usa tel +1 ( 408 ) 944-0800 fax + 1 (408) 474-1000 http://www.micrel.com january 2008 m9999-012408-a general description the mic5332 is a tiny dual low quiescent current ldo. the mic5332 provides two high performance 300ma ldos, and a por generator into a 2mm x 2mm thin mlf ? package. the mic5332 dual ultra low dropout (uldo?) linear regulator is easy to use. a minimum output capacitance of 1f for each of the outputs is required. an input capacitor is required when the power supply is more than 4-inches away from the device. the evaluation board includes an input capacitor of 1f to allow for long inductive test leads. requirements the mic5332 evaluation boar d requires an input power source that is able to deliver greater than 600ma with an input voltage range of 2.3v to 5.5v. the output load can be either an active or passive load. precautions the evaluation board does not have reverse polarity protection. applying a negative voltage to the v in terminal may damage the device. the mic5332 evaluation board is tailored for a li-ion range input supply voltage. it should not exceed 5.5v on the input. getting started 1. connect an external supply to v in . apply the desired input voltage to the v in (j1) and ground terminal (j2) of the evaluation board, paying careful attention to polarity and supply voltage (2.3v v in 5.5v). an ammeter may be placed between the input supply and the v in terminal to the evaluation board. en sure that the supply voltage is monitored at the v in terminal, as the ammeter and/or power lead resistance can reduce the voltage supplied to the input. 2. enable/disable the mic5332 . the evaluation board is provided with 10k pull up resistors on both of the enable pins (en1 and en2) to v in . to disable an output, simply jumper the en terminal (j5 for ldo1, j4 for ldo2 ) to the gnd terminal (j2) . the enable pins must be either pulled high or low. removing the pull up resistors and leaving the pins floating will ca use the regulators to operate in an indet erminate state . 3. connect the loads to the v out terminals (j6 for ldo1, j8 for ldo2) and ground terminal (j7). the load can be either a passive (resistor) or active (electronic load). be sure to monitor the output voltage at the v out (j6 and j8) terminals. 4. monitoring power on reset. connect an oscilloscope to t he por2 terminal (j3) and ground terminal (j7). the evaluation board has a 0.1f capacitor connected from the cset2 pin-to-gnd. this corresponds to a delay of 100ms on the por2 output. the por2 delay time can be modified by changing the value of c4 with a rate of 1s/f, or removing c4 for zero delay. ordering information part number description mic5332-xxymt ev evaluation board with the 300ma dual uldo? device downloaded from: http:///
micrel, inc. mic5332 evaluation board january 2008 2 m9999-012408-a evaluation board schematic vin gnd vout1 cset2 u1mic5332-xxymt por2en1 vout2 en2 r310k vin c1 1f c40.1f c21f c31f j1 vin j3 por j4 en2 j5 en1 j2 gnd j6vout1 j7gnd j8vout2 1 3 5 2 4 8 7 6 r210k r110k bill of materials item part number manufacturer description qty c1, c2, c3 c1608x5r0j105k tdk (1) capacitor, 1f ceramic, 6.3v, x5r, size 0603 3 c4 vj0603y104kxxat vishay (2) capacitor, 0.1f ceramic, 10v, x7r, size 0603 1 r1, r2, r3 crcw06031002fkeye3 vishay (2) resistor, 10k ? , 1%, 1/16w, size 0603 3 u1 mic5332-xxymt micrel (3) ucap ldo, dual 300ma, size 2mm x 2mm thin mlf ? 1 notes: 1. tdk: www.tdk.com 2. vishay: www.vishay.com 3. micrel, inc.: www.micrel.com downloaded from: http:///
micrel, inc. mic5332 evaluation board january 2008 3 m9999-012408-a pcb layout recommendations 1400 (mil) 1350 (mil) top layer 1400 (mil) 1350 (mil) bottom layer downloaded from: http:///
micrel, inc. mic5332 evaluation board january 2008 4 m9999-012408-a micrel, inc. 2180 fortune drive san jose, ca 95131 usa tel +1 (408) 944-0800 fax +1 (408) 474-1000 web http://www.micrel.com the information furnished by micrel in this data sheet is belie ved to be accurate and reliable. however, no responsibility is a ssumed by micrel for its use. micrel reserves the right to change circuitry and specifications at any time without notification to the customer. micrel products are not designed or authori zed for use as components in life support appliances, devices or systems where malfu nction of a product can reasonably be expected to result in personal injury. life suppo rt devices or systems are devices or systems that (a) are in tended for surgical implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significan t injury to the user. a purchasers use or sale of micrel produc ts for use in life support app liances, devices or systems is a purchasers own risk and purchaser agrees to fully indemnify micrel for any damages resulting from such use or sale. ? 2008 micrel, incorporated. downloaded from: http:///
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