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rev. 1.8 july 2012 www.aosmd.com page 1 of 15 aoz1360 28v programmable current-limited load switch general description the aoz1360 is a member of alpha and omega semiconductor?s high-side load switch family intended for applications that require circuit protection. the device operates from a source voltage between 5.5v and 28v. the internal current limiting circuit protects the input supply voltage from large current load. the current limit can be set with an external resistor. the aoz1360 provides thermal protection function that limits excessive power dissipation. the device employs internal soft-start circuitry to control in-rush current due to highly capacitive loads associated with hot-plug events. it features low quiescent current of 220 a and the supply current reduces to less than 1 a at shutdown. the aoz1360 is available in either an so-8 or a dfn-10 4 mm x 4 mm package which can operate over a -40 ? c to +85 ? c temperature range. features ? 35m ? maximum on resistance ? programmable current limit ? 5.5v to 28v operating input voltage ? low quiescent current ? under-voltage lockout ? thermal shutdown protection ? 2.5kv esd rating ? available in so-8 or dfn-10 package applications ? notebook pcs ? hot swap supplies typical application aoz1360 in en ss out set gnd c1 1f c3 1nf on off v out v in c2 1f r1 84.5k
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 2 of 15 ordering information aos green products use reduced levels of halogens, and are also rohs compliant. please visit www.aosmd.com/media/aosgreenpolicy.pdf for additional information. pin configuration pin description part number package temperature range environmental aoz1360ail so-8 -40 c to +85 c green product aoz1360dil dfn-10 4x4 pin name pin number pin function so-8 dfn 4x4 10l in 1, 2 1, 2 p-channel mosfet source. connect a 1 f capacitor from in to gnd. gnd 3 4 ground. ss 4 5 soft-start pin. connect a capacitor from ss to gnd to set the soft-start time. connect ss to in to set to the default soft-start time of 100us. en 5 6 enable input. set 6 7 current limit set pin. connect a resi stor from set to gnd to set the switch current limit. nc 3, 8 no connect out 7, 8 9, 10 p-channel mosfet drain. connect a capacitor with 0.1 f or above from out to gnd. so-8 (top view) dfn-10 (top view) in in ss en out 1 2 8 gnd 3 out 7 set 6 4 5 in in ss en out 1 2 4 6 9 gnd 3 out 8 set 7 5 10 nc nc out gnd
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 3 of 15 functional block diagram figure 1. functional block diagram timing diagram figure 2. aoz1360 timing diagram absolute maximum ratings exceeding the absolute maximum ratings may damage the device. recommended operating conditions the device is not guaranteed to operate beyond the maximum recommended operating conditions. in out set ss en 5.5v gate driver & slew rate control 5v linear regulator thermal shutdown current limit uvlo comparator aoz1360 c1 1f c2 r1 84.5k 1f c3 1nf 10% 90% 90% vil vih en t d(on) t r out t d(off) parameter rating in to gnd -0.3 v to +30 v en, set, out to gnd -0.3 v to v in + 0.3 v ss, set -0.3 v to +6 v maximum junction temperature (t j ) +150 c esd rating (human body model) 2.5 kv parameter rating junction temperature (t j ) -40 c to +125 c thermal resistance so-8 ( ? ja ) dfn-10 ( ? ja ) 82 c/w 63 c/w
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 4 of 15 electrical characteristics v in = 12v, t a = 25c unless otherwise stated. symbol parameter conditions min. typ. max units v in input supply voltage 5.5 28 v v uvlo undervoltage lockout threshold in rising 4.9 5.4 v v uvhys undervoltage lockout hysteresis 400 mv i in_on input quiescent current en = in, no load 220 400 ? a i in_off input shutdown current en = gnd, no load 1 ? a i leak output leakage current en = gnd, no load 1 ? a r ds(on) switch on resistance aoz1360ai v in = 12 v 22 35 m ? r ds(on) switch on resistance aoz1360ai v in = 5.5 v 33 43 m ? i lim current limit r set = 84.5 k ? 22.73.4a v en_l enable input low voltage 0.8 v v en_h enable input high voltage 2.0 v v en_hys enable input hysteresis 100 mv i en_bias enable input bias current 1 ? a td_on turn-on delay time en_50% to out_10% r l = 120 ? , c l = 1 ? f, ss = floated 220 ? s t on turn-on rise time out_10% to 90% r l = 120 ? , c l = 1 ? f, ss = floated 280 ? s r l = 120 ? , c l = 1 ? f, c ss = 1 nf 360 t off turn-off fall time r l = 120 ? , c l = 1 ? f, ss = floated 280 ? s t sd thermal shutdown threshold 130 ? c t sd_hys thermal shutdown hysteresis 30 ? c
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 5 of 15 typical performance characteristics 150 170 190 210 230 250 270 290 5101520 v in (v) input quiescent current supply current (a) 25 30 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 85c 25c -40c 85c 25c -40c 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 4.2 4.3 4.4 4.5 4.6 4.7 4.8 -60 -40 -20 0 20 40 60 80 100 120 rising falling 0 5 10 15 20 25 30 35 0 5 10 15 20 25 30 35 40 -60 -40 -20 0 20 40 60 80 100 120 5 101520 v in (v) input shutdown current supply current (a) 25 30 v in = 12v v in = 5.5v 10 30 50 70 90 -10 -30 -50 temperature (c) output leakage current output leakage current (a) 10 30 50 70 90 -10 -30 -50 v in (v) r ds(on) vs. supply voltage r ds(on) (m) temperature (c) r ds(on) vs. temperature r ds(on) (m) temperature (c) uvlo threshold vs. temperature threshold (v) v in = 12v v in = 5.5v
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 6 of 15 typical characteristics (continued) 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 -60 -40 -20 0 20 40 60 80 100 120 enable input threshold (rising) vs. temperature v en (v) enable input threshold (falling) vs. temperature v en (v) temperature (c) -60 -40 -20 0 20 40 60 80 100 120 temperature (c) v in = 12v v in = 5.5v v in = 12v v in = 5.5v 7.0 6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 6.5 6.3 6.1 5.9 5.7 5.5 5.3 5.1 4.9 4.7 4.5 0 10203040 5060708090 current derating curve for so8 current derating curve for dfn-10 4x4 current (a) ambient temperature (c) current (a) ambient temperature (c) -40 -20 0 20 40 60 80 100 0.0 0.1 1.0 10.0 100.0 0.01 0.1 1 10 100 -i d (amps) -v ds (volts) 10 s 10s 1ms dc r ds(on) limited t j(max) =150 e c t a =25 e c 100 figure 3. internal power mosfet soa
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 7 of 15 functional characteristics turn-on (v in = 12v, r = 5.6) 1ms/div v in 2v/div v out 2v/div en 1v/div i out 0.5a/div turn-off (v in = 12v, r = 5.6) 20s/div v in 2v/div v out 2v/div en 1v/div i out 0.5a/div over temperature (v in = 12v, r = 3.6) 100ms/div v in 2v/div v out 2v/div en 1v/div i out 0.5a/div current limit (v in = 12v, r = 3.6) 5ms/div v in 2v/div v out 2v/div en 1v/div i out 0.5a/div
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 8 of 15 detailed description introduction the aoz1360 is a 35 m ? p-channel high-side load switch with adjustable soft-start slew-rate control, programmable current limit and thermal shutdown. it operates with an input voltage range from 5.5 v to 28 v. enable the en pin is the on/off control for the output switch. it is an active-high input. the en pin is active after v in is above the uvlo threshold of 4.9 v. conversely, the en pin will be deactivated if the v in falls below the uvlo of 2.0v. the en pin must be driven to a logic high or logic low state to guarantee operation. while disabled, the aoz1360 only draws approximately 1 a supply current. the en is a high impedance input with an esd protection diode to ground and should not be forced below ground. this input level is compatible with most microcontroller outputs and other logic families. under-voltage lockout (uvlo) the under-voltage lockout (uvlo) circuit of the aoz1360 monitors the input voltage and prevents the output mosfet from turning on until v in exceeds 4.9 v. adjustable soft-start slew-rate control when the en pin is high, the slew rate control circuitry applies voltage on the gate of the pmos switch in a manner such that the output voltage and current is ramped up linearly until it reaches the steady-state load current level. the slew rate can be adjusted by an external capacitor conn ected between the ss pin and ground. the slew rate rise time, ton, can be set using the following equation: programmable current limit the current limit is programmed by an external resistor connected between the set pin and ground. this sets a reference voltage to the current limit error amplifier that compares it to a sensed voltage that is generated by passing a small portion of the load current through an internal amplifier. when the sensed load current exceeds the set current limit, the load current is then clamped at the set limit and the vout drops to whatever voltage is necessary to clamp the load current. the aoz1360 will stay in this condition until the load current no longer exceeds the current limit or if the thermal shutdown protection is engaged. thermal-shutdown protection during current limit or short circuit conditions, the pmos resistance is increa sed to clamp the load current. this increases the power dissipation in the chip causing the die temperature to rise. when the die temperature reaches 130 c the therma l shutdown circuitry will shutdown the device. there is a 30 c hysteresis after which the device w ill turn back on and go through soft start. the thermal shutdown w ill cycle repeatedly until the short circuit condition is resolved or the enable pin is pulled low externally. ton css v in ? 30 ? a -------------------------- =
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 9 of 15 application information input capacitor selection the input capacitor prevents large voltage transients from appearing at the input and provides the instantaneous current needed each time the switch turns on. the input capacito r also limits input voltage drop and prevents high-frequency noise on the power line from passing through the output of the power side. the choice of input capacitor is based on its ripple current and voltage ratings rather than the actual capacitance value. the input capacitor should be located as close to vin as possibl e. a 1 f ceramic cap is recommended. however, highe r capacitor values will further reduce the voltage drop at the input. output capacitor selection the output capacitor acts in a similar way. a small 0.1 f capacitor prevents high-frequency noise from going into the system. also, the output capacitor has to supply enough current for any large load that may occur during system transients. this bulk capacitor must be large enough to supply fast transient load in order to prevent the output from dropping. current limit setting the current limit is set by an external resistor connected to the set pin. refer to figure 3 for current limit settings. figure 3 slew rate setting slew rate is set by changing the capacitor value on the ss pin of the device. a capacitor connected between the ss pin and ground will reduce the output sl ew-rate. the capacitive range is 0.001 f to 0.1 f. refer to figure 4. figure 4. output slew rate adjustment vs. capacitance power dissipation calculation calculate the power dissipation for normal load condition using the following equation: p d = r on x (i out ) 2 the worst case power dissipation occurs when the load current hits the current limit due to over-current or short circuit faults. the power dissipation under these conditions can be calculated using the following equation: p d = (v in ? v out ) x i limit 7 6 5 4 3 2 1 0 35 45 55 65 75 85 95 105 aoz1360 rset vs ilim ilim (a) rset (k ) 0 5 10 15 20 25 30 35 40 45 0 0.02 0.04 0.06 0.08 0.1 capacitance (f) slew rate (ms)
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 10 of 15 layout guidelines proper pcb layout is important for improving the thermal and overall performance of the aoz1360. to optimize the switch response time for outputting short-circuit conditions, keep all traces as short as possible. this will also reduce the effect of unwanted parasitic inductance. place the input and output bypass capacitors as close as possible to the in and out pins. the input and output pcb traces should be as wide as possible for the given pcb space. use a ground plane to enhance the power dissipation capability of the device. figure 5. aoz1360ai (so-8) layout figure 6. aoz1360di (dfn4x4 10l) layout c2 c1 c3 r1 1 2 4 6 9 38 7 10 nc out out nc out gnd gnd in in set en g n d 5 ss c2 c1 gnd gnd en 3 5 7 out 2 1 in in out 8 c3 r1 ss set 4 6
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 11 of 15 package dimensions, so-8l notes: 1. all dimensions are in millimeters. 2. dimensions are inclusive of plating 3. package body sizes exclude mold flash and gate burrs. mold flash at the non-lead sides should be less than 6 mils. 4. dimension l is measured in gauge plane. 5. controlling dimension is millimeter, converted inch dimensions are not necessarily exact. symbols a a1 a2 b c d e e e1 h l dimensions in millimeters recommended land pattern min. 1.35 0.10 1.25 0.31 0.17 4.80 3.80 5.80 0.25 0.40 0 d c l h x 45 7 (4x) b 2.20 2.87 5.74 0.80 0.635 unit: mm 1.27 a1 a2 a 0.1 gauge plane seating plane 0.25 e 8 1 e e1 nom. 1.65 1.50 4.90 3.90 1.27 bsc 6.00 max. 1.75 0.25 1.65 0.51 0.25 5.00 4.00 6.20 0.50 1.27 8 symbols a a1 a2 b c d e e e1 h l dimensions in inches min. 0.053 0.004 0.049 0.012 0.007 0.189 0.150 0.228 0.010 0.016 0 nom. 0.065 0.059 0.193 0.154 0.050 bsc 0.236 max. 0.069 0.010 0.065 0.020 0.010 0.197 0.157 0.244 0.020 0.050 8
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 12 of 15 tape and reel dimensions, so-8 carrier tape reel tape size 12mm reel size ?330 m ?330.00 0.50 package so-8 (12mm) a0 6.40 0.10 b0 5.20 0.10 k0 2.10 0.10 d0 1.60 0.10 d1 1.50 0.10 e 12.00 0.10 e1 1.75 0.10 e2 5.50 0.10 p0 8.00 0.10 p1 4.00 0.10 p2 2.00 0.10 t 0.25 0.10 n ?97.00 0.10 k0 unit: mm b0 g m w1 s k h n w v r trailer tape 300mm min. or 75 empty pockets components tape orientation in pocket leader tape 500mm min. or 125 empty pockets a0 p1 p2 feeding direction p0 e2 e1 e d0 t d1 w 13.00 0.30 w1 17.40 1.00 h ?13.00 +0.50/-0.20 k 10.60 s 2.00 0.50 g r v leader/trailer and orientation unit: mm
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 13 of 15 package dimensions, dfn-10l, 4x4 seating plane b a c 4 6 5 3 2 notes: 1. all dimensions are in millimeters. 2. the dimensions with * are just for reference. 3. the location of the terminal #1 identifier and terminal numbering convention conforms to jedec publication 95 spp-002. 4. dimension b applies to metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. if the terminal has the optional radius on the other end of the terminal, then dimension b should not be measured in that radius area. 5. coplanarity applies to the terminals and all other bottom surface metallization. 6. drawings shown are for illustration only. ddd eee b e l e1 d2 a1 a a3 d1 pin #1 ida l1 l3 10x index area (d/2xe/2) chamfer 0.20 unit: mm * l4 l4 * 0.35 typ 0.38 * 6 10 pin 1 d/2 d/2 d e 1 5 5 1 10 6 chamfer 0.20 0.02 pin #1 ida 1.78 1.42 0.30 0.30 2.30 0.65 typ. 0.65 typ. 1.15 3.55 e1/2 l2 top view bottom view side view recommended land pattern symbols a a1 a3 b d d1 d2 e e1 e l l1 l2 l3 l4 aaa bbb ccc ddd eee dimensions in millimeters min. 0.70 0.00 0.30 3.95 1.58 1.22 3.95 2.20 0.50 0.28 nom. 0.75 0.02 0.203 ref 0.35 4.00 1.68 1.32 4.00 2.30 0.65 bsc 0.55 0.02 0.38 0.85 ref 0.30 ref 0.15 0.10 0.10 0.08 0.05 max. 0.80 0.05 0.40 4.05 1.78 1.42 4.05 2.40 0.60 0.12 0.48 symbols a a1 a3 b d d1 d2 e e1 e l l1 l2 l3 l4 aaa bbb ccc ddd eee dimensions in inches min. 0.028 0.000 0.012 0.156 0.062 0.048 0.156 0.087 0.020 0.011 nom. 0.030 0.001 0.008 ref 0.014 0.157 0.066 0.052 0.157 0.091 0.026 bsc 0.022 0.001 0.015 0.033 ref. 0.012 ref 0.006 0.004 0.004 0.003 0.002 max. 0.031 0.002 0.016 0.159 0.070 0.056 0.159 0.094 0.024 0.005 0.019
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 14 of 15 tape and reel dime nsions, dfn-10l, 4x4 package dfn 4x4 (12mm) a0 b0 k0 e e1 e2 d0 d1 p0 p1 p2 t 4.35 0.10 0.10 1.10 min. 1.50 1.50 +0.1/-0.0 0.3 12.0 0.10 1.75 0.05 5.50 0.10 8.00 0.10 4.00 0.05 2.00 0.05 0.30 r v m n g s w n m ? 79.0 ? 330.0 2.0 12.4 12 mm tape size v r s k 0.5 2.0 10.5 g h w1 ? 13.0 0.5 17.0 h k w w1 reel size ? 330 unit: mm unit: mm 1.0 +2.0/-0.0 +2.6/-0.0 d1 p1 e1 e2 e p2 k0 t a0 p0 b0 d0 c l 0.2 0.10 4.35 carrier tape reel trailer tape 300mm min. or 75 empty pockets components tape orientation in pocket leader tape 500mm min. or 125 empty pockets leader/trailer and orientation feeding direction
aoz1360 rev. 1.8 july 2012 www.aosmd.com page 15 of 15 part marking z1360ai fay part number code assembly lot code fab & assembly location year & week code wlt underscore indicates green product so-8 z1360di za8r1b part number code assembly lot code fab & assembly location year & week code dfn-10 underscore indicates green product as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. a critical component in any component of a life support, device, or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. alpha & omega semiconductor reserves the right to make changes at any time without notice. life support policy alpha & omega semiconductor products ar e not authorized for use as critical components in life support devices or systems.

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