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1 www.semtech.com power management sc2643vx multi-platform multi-phase pwm controller may 11, 2005 description applications the sc2643vx provides a solution for microprocessor core voltage regulation with up to 4 paralleled pwm channels. the solution can also be configured as 2, 3, or 4-phase form. this multi-phase buck regulator utilizes the phase- shift timing control to allow interleaved switching of the power switches. this architecture minimizes the core volt- age ripple and the input current ripple, which leads to op- timized voltage regulator design for power density, tran- sient responses, and the thermal performances. to satisfy the highly dynamic nature of the modern micro- processors, the sc2643vx adopts peak current mode con- trol topology which ensures wide control loop bandwidth and fast transient responses. the current mode control provides intrinsic phase current matching. the maximum ripple frequency is greater than 2.8mhz. one of the outstanding features of the sc2643vx is its voltage regulation accuracy. not only does it provide bet- ter than 0.5% set point accuracy, but also the accuracy to be fully compliant with stringent load line slope specifica- tions mandated by the modern microprocessors. lossless output current sensing ensures the regulator output volt- age is accurately positioned according to the load current condition, and an internal temperature compensation tech- nology further enhances the performance of voltage accu- racy. the patented combi-sense tm topology is employed by sc2643vx. the mosfet r ds(on) and the output inductor winding resistance are used to generate the phase current information. the combi-sense tm mosfet driver plus the sc2643vx enables the complete solution. the sc2643vx is a multi-platform controller. it conforms to intel vrm/vrd10.x, vrm9.x, and amd k-8 (opteron tm ) vid specifications. with very minor changes of the sche- matic and the layout, the sc2643vx based solution can be ported form one platform to another. this greatly ben- efits system manufactures by reducing design cycle times and streamlining inventory management. the sc2643vx supports vid-on-fly applications for any platform. the cycle-by-cycle current limit plus the intelli- gent over current shut down provide the maximum versa- tility of the system without false tripping under all possible changes of vid and load conditions. the differential volt- age feedback sense eliminates the error caused by high ? vrd/vrm10.x, vrm9.x, and k-8 compliant ? core voltage set point accuracy 0.5% ? combi-sense tm current mode control ? intrinsic phase current matching ? fast transient responses ? active droop with temperature compensation to meet load line slope ? support vid-on-fly with 5 or 6 bit vid ? enable function for power sequencing ? cycle-by-cycle peak current limit ? intelligent over current shut down ? over voltage protection when using semtech combi-sense tm driver ? under voltage protection built in ? external programmable soft-start ? externally programmable switching frequency (up to 2.8mhz output voltage ripple frequency) ? 2, 3, or 4-phase configurations ? voltage regulator vrd/vrm10.x ? voltage regulator vrm9.x ? voltage regulator k-8 ? high current, low voltage step down dc/dc converters features load current on the ground plane. external offset is easy to achieve for any platforms and the vid settings. the enable function is also provided to interface with the cor- responding system signal for correct start up timing and shut down timing. (multiple patents pending) (multiple patents pending) (multiple patents pending) (multiple patents pending) (multiple patents pending)
2 ? 2005 semtech corp. www.semtech.com power management sc2643vx typical application circuit r18 ir0 vid1 m7 vout c29 1uf rosc pwrgood (open collector output) c18 0.1uf r21 1 atx12v aux3 m2 vin d2 d1n4148 vcc r15 offset+ vid3 c7 r14 r5 c9 c24 1uf pn3 r19 100 m5 r17 1 c12 4.7uf c11 1uf c8 r12 100 c2 4.7uf/1206 (open collector input, no pull-up) m9 c22 1uf atx12v pgnd aux3 pn2 v_core+ + c1 1800uf/16v vcc c6 note (3) r2 differential pair for remote sense c21 4.7uf r24 0r0 l3 1 2 r8 m1 m3 c17 r23 100 vin pull-up voltage vr10: 2v vrm9.x: 5v k-8: 12v pn3 c4 u1 sc1211 1 2 3 4 5 6 7 9 8 drn tg bst co vpn vin vr eg pgnd bg c5 1nf l2 1 2 c28 2.2nf + cout r6 1 vout aux2 u2 sc2643vx 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 os3 os2 os1 bgout errout gndsen fb dacstep vcc vid4 vid3 vid2 vid1 vid0 vid5 pgood oscref agnd out1 out2 out3 out4 outsen os4 vrm_en vid5 vcc c20 2.2nf vid4 aux1 r9 c16 1uf note (2) + c14 1800uf/16v r4 r1 2r2 r11 ir0 pn2 r22 ir0 c13 1uf vid0 r13 1.5k r20 10 c15 4.7uf/1206 note (2) c26 4.7uf/1206 v_core- note (4) r10 l4 1 2 note (1) pn1 atx12v vid2 vin u3 sc1211 1 2 3 4 5 6 7 9 8 drn tg bst co vpn vin vr eg pgnd bg c19 1nf + c25 1800uf/16v r3 c3 1uf aux1 d1 d1n4148 l1 640nh 1 2 c27 1nf m4 d3 d1n4148 m6 pn1 c30 4.7uf c10 2.2nf m8 aux2 u4 sc1211 1 2 3 4 5 6 7 9 8 drn tg bst co vpn vin vr eg pgnd bg r16 offset- c23 4.7uf r7 notes: (1) output filter design: please follow guidelines issued by intel and amd. (2) please follow guidelines issued by intel and amd. (3) open collector/drain input, no pull-up. (4) use the same power source as fet driver?s (sc1211).
3 ? 2005 semtech corp. www.semtech.com power management sc2643vx absolute maximum ratings electrical characteristics exceeding the specifications below may result in permanent damage to the device, or device malfunction. operation outside of th e parameters specified in the electrical characteristics section is not implied. unless otherwise specified, all other voltages are referenced to agnd. unless specified: v cc = 12v, vid=1.30v (110110,vrd10) or 1.50v (101110,vrd10), f osc = 600khz, t a = 27 o c. see typical application circuit. r e t e m a r a pl o b m y ss n o i t i d n o c t s e tn i mp y tx a ms t i n u y l p p u s _ p i h c e g a t l o v y l p p u s c iv c c 5 . 72 14 1v t n e r r u c y l p p u s c ii c c 0 13 1a m p u p m a r o l v uo l v ug n i s i r c c v3 . 75 . 7v n w o d p m a r o l v uo l v ug n i l l a f c c v4 . 65 . 6v n o i t c e s e c n e r e f e r t u p t u o p a g d n a bv t u o g b c t u o g b f n 7 . 4 =5 4 9 . 20 9 9 . 25 3 0 . 3v t n e r r u c e c r u o s 0 2 20 0 30 3 3 a n o i t c e j e r y l p p u sv c c v 0 . 4 1 ~ v 0 . 0 1 =5 . 0v / v m y t i l i b a t s e r u t a r e p m e t0 o t < c a 5 8 < o c5 . 0% p e t s d i v b s l , 8 - k , x . 9 m r v5 2v m p e t s d i v b s l , 0 1 m r v / d r v5 . 2 1v m y c a r u c c a e g a t l o vv t u o v m 0 2 - = t e s f f o l a n r e t n i ; 0 1 d r v5 . 0 -5 . 0 +% v m 0 2 - = t e s f f o l a n r e t n i ; x . 9 m r v1 -1 +% v m 5 2 + = t e s f f o l a n r e t n i ; 8 - k1 -1 +% r e t e m a r a pl o b m y sm u m i x a ms t i n u v c c e g a t l o v y l p p u sv c c 0 2 o t 3 . 0 -v e g a t l o v t u p t u o t c e r i d / e s n e s - i b m o c n e s t u o , 4 s o , 3 s o , 2 s o , 1 s o5v 5 d i v t p e c x e s n i p d i v4 d i v ~ 0 d i v7v 5 d i v5 d i vv o t 3 . 0 - c c 3 . 0 +v s n i p t u o d n a g n i t t e s y c n e u q e r f r o t a l l i c s o f e r c s o , 3 t u o , 2 t u o , 1 t u o7v e s n e s d n u o r g e s n e s g 3 . 0 + o t 3 . 0 -v s n i p r e h t o l l a p e t s c a d , b f , 4 t u ov o t 3 . 0 - c c 3 . 0 +v e s a c o t n o i t c n u j f o e c n a t s i s e r l a m r e h t c j 6 . 5 1 o w / c e g n a r e r u t a r e p m e t t n e i b m at a 5 0 1 o t 0 o c e g n a r e r u t a r e p m e t n o i t c n u jt j 5 2 1 o t 0 o c e g n a r e r u t a r e p m e t e g a r o t st g t s 0 5 1 o t 5 6 - o c . c e s 0 1 ) g n i r e d l o s ( e r u t a r e p m e t d a e lt d a e l 0 6 2 o c
4 ? 2005 semtech corp. www.semtech.com power management sc2643vx electrical characteristics (cont.) unless specified: v cc = 12v, vid=1.30v (110110,vrd10) or 1.50v (101110,vrd10), f osc = 600khz, t a = 27 o c. see typical application circuit. r e t e m a r a pl o b m y ss n o i t i d n o c t s e tn i mp y tx a ms t i n u r e i f i l p m a r o r r e e g a t l o v e g a t l o v t e s f f o t u p n i 3 v m t n e r r u c s a i b t u p n i 5 2a n n i a g p o o l n e p ov < v 1 t u o r r e v 4 <0 8b d h t d i w d n a b n i a g y t i n uc t u o r r e f p 0 1 =0 1z h m e t a r w e l s 0 1/ v s n i a g e c n a t c u d n o c s n a r tg a e 5 . 0v / a m p c o r o f l e v e l p m a l cv x a m o e 4 . 4v y c a r u c c a l e v e l p m a l c 8 -8 +% s r e i f i l p m a e s n e s t n e r r u c e g a t l o v t e s f f o t u p n i 3 v m t n e r r u c s a i b t u p n i 0 5a n n i a gg a c 0 1v / v r r m cv 3 o t 00 8b d e g n a r e d o m n o m m o c t u p n i 3 . 0 -3v h c t a m n i a g 2% h t d i w d n a b 6z h m d o o g r e w o p g n i s i r e r o c v r o f d l o h s e r h t d l o h s e r h t d o o g r e w o p - d i v0 5 20 5 30 0 4v m g n i l l a f e r o c v r o f d l o h s e r h t d l o h s e r h t d o o g r e w o p - d i v5 7 5v m e g a k a e l h g i h t u p t u o v = d o o g r w p c c 0 0 1a n k n i s w o l t u p t u o v 8 . 0 = d o o g r w p2a m s d i v d l o h s e r h t e g a t l o v w o l t u p n i ] 5 : 0 d i v [2 . 1v d l o h s e r h t e g a t l o v h g i h t u p n i ] 5 : 0 d i v [8 . 1 t n e r r u c s a i b v 0 = ] 4 : 0 d i v [0 2 15 8 10 5 2 a 0 1 m r v / d r v r o f e g a t l o v p u - l l u p 5 d i v5 d i v8 . 15 . 2v x . 9 m r v r o f e g a t l o v p u - l l u p 5 d i v5 d i v46v 8 - k r o f e g a t l o v p u - l l u p 5 d i v5 d i v8c c vv
5 ? 2005 semtech corp. www.semtech.com power management sc2643vx r e t e m a r a pl o b m y ss n o i t i d n o c t s e tn i mp y tx a ms t i n u n o i t c e s r o t a l l i c s o y c n e u q e r f r o t a l l i c s of c s o r c s o k 9 0 3 =0 4 50 0 60 6 6z h k e g n a r y c n e u q e r f r o t a l l i c s of c s o 0 3 30 0 8 2z h k y t i l i b a t s e r u t a r e p m e t0 o t < c a 5 8 < o c 5 % n o i t a r e p o e s a h p - 3 d l o h s e r h t p u l l u p 4 t u p t u o n o i t a r e p o e s a h p - 3 r o f5 . 345 . 4v r e i f i l p m a p o o r d n i a gg a d 4 . 5v / v y c a r u c c a n i a g ) 1 ( 5 % n o i t c e s t i m i l t n e r r u c e g a t l o v n w o d t u h s d l o h s e r h t n w o d t u h s - d i v0 5 50 5 60 5 7v m n o i t c e s d i v c i m a n y d p e t s c a d f o t n e r r u c g n i k n i si k n i s _ c a d 0 9 3a u p e t s c a d f o t n e r r u c g n i c r u o si c r s _ c a d 0 4 3a u notes: 1) guaranteed by design, not tested in production. specifications subject to change without notice. electrical characteristics (cont.) unless specified: v cc = 12v, vid=1.30v (110110,vrd10) or 1.50v (101110,vrd10), f osc = 600khz, t a = 27 o c. see typical application circuit.
6 ? 2005 semtech corp. www.semtech.com power management sc2643vx pin configurations pin descriptions ordering information # n i pe m a n n i pn o i t c n u f n i p 13 s o. 3 t n e r r u c e s n e s - i b m o c 22 s o n o i t a r e p o e s a h p 2 r o f n e s t u o o t t c e n n o c . 2 t n e r r u c e s n e s - i b m o c 31 s o. 1 t n e r r u c e s n e s - i b m o c 4t u o g b. n i p e c n e r e f e r g b 5t u o r r e. t u p t u o r e i f i l p m a - r o r r e 6e s n e s g. d n g r o f e s n e s e t o m e r 7b f. n i p k c a b d e e f 8p e t s c a d. d e e p s p e t s d i v 9c c v. p i h c r o f y l p p u s r e w o p 0 14 d i v. b s m d i v 1 13 d i v 2 12 d i v 3 11 d i v 4 10 d i v. b s l d i v 5 15 d i v . x . 9 m r v r o f v 5 o t p u - l l u p 5 d i v ; 8 - k r o f c c v o t p u - l l u p 5 d i v . t c e l e s e p y t d i v / b s l 2 / 1 d i v 6 1d o o g p. d o o g r e w o p 7 1f e r c s o. g n i t t e s y c n e u q e r f r o t a l l i c s o 8 1d n g a. g o l a n a r o f d n u o r g n a e l c 9 11 t u o. 1 t u p t u o m w p 0 22 t u o. 2 t u p t u o m w p 1 23 t u o. 3 t u p t u o m w p 2 24 t u o. n o i t a r e p o e s a h p 3 r o f c c v o t t c e n n o c . 4 t u p t u o m w p 3 2n e s t u o. e s n e s t u p t u o t c e r i d 4 24 s o . n o i t a r e p o e s a h p 3 r o 2 r o f n e s t u o o t t c e n n o c . 4 t n e r r u c e s n e s - i b m o c (24-pin tssop) top view 12 11 6 5 4 3 1 2 10 9 8 7 13 14 19 20 21 22 24 23 15 16 17 18 vid1 vid0 out1 out2 out3 out4 os4 outsen vid5 pgood oscref agnd vid2 vid3 gsense errout bgout os1 os3 os2 vid4 vcc dacstep fb note: (1) only available in tape and reel packaging. a reel contains 2500 devices for the tssop-24 package. (2) lead free package.device is fully weee and rohs compliant. r e b m u n t r a pe g a k c a pt ( e g n a r . p m e t j ) r t s t x v 3 4 6 2 c s ) 1 ( 4 2 - p o s s t5 2 1 o t 0 o c t r t s t x v 3 4 6 2 c s ) 2 ( ) 1 ( 4 2 - p o s s t5 2 1 o t 0 o c b v e x v 3 4 6 2 c sd r a o b n o i t a u l a v e
7 ? 2005 semtech corp. www.semtech.com power management sc2643vx block diagram ocp & shutdowm errout bgout r pwrgd 16 vid5 15 out + - c/a3 agnd 18 e/a vcc os3 1 dac vbg buffer clock divider clk sel3 p1 p2 p3 p4 outsen 23 dacstep 8 vid4 10 r pwm4 out + - 2r pwm2 outsen out + - c/a4 power good threshold r r s q 3/4 phase selection threshold drv3 vid0 14 r uvlo & latch oscref 17 out + - drv4 r s q pwr_good drv1 c/a1 out1 19 r drv2 errout vid1 13 out4 22 r s q 2r os2 2 droop out + - vbg out + - os1 3 out + - vcc gsen vref pwm1 gndsen 6 vid0 vid1 vid2 vid3 vid4 vid5 vdac shut down os4 24 out + - out + - bgout 4 c/a2 3 phase select errout 5 out + - out + - bandgap bgout out + - 11111 inhibit out3 21 out + - vid3 11 pwm3 out + - outsen r s q out2 20 oscillator osc rosc ramp vcc 9 fb 7 vid2 12
8 ? 2005 semtech corp. www.semtech.com power management sc2643vx applications information- output voltage e g a t l o v t u p t u o x . 9 m r v t . ) g n i t a o l f r o ( h g i h = 1 ; d n g = 0 : d e i f i c e p s s s e l n u a v , c 5 2 = c c v 2 1 = t u o v ) v ( 4 d i v3 d i v2 d i v1 d i v0 d i v 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 f f o 1 . 1 5 2 1 . 1 5 1 . 1 5 7 1 . 1 2 . 1 5 2 2 . 1 5 2 . 1 5 7 2 . 1 3 . 1 5 2 3 . 1 5 3 . 1 5 7 3 . 1 4 . 1 5 2 4 . 1 5 4 . 1 5 7 4 . 1 5 . 1 5 2 5 . 1 5 5 . 1 5 7 5 . 1 6 . 1 5 2 6 . 1 5 6 . 1 5 7 6 . 1 7 . 1 5 2 7 . 1 5 7 . 1 5 7 7 . 1 8 . 1 5 2 8 . 1 5 8 . 1
9 ? 2005 semtech corp. www.semtech.com power management sc2643vx applications information- output voltage (cont) e g a t l o v t u p t u o 0 1 d r v t . h g i h = 1 ; d n g = 0 : d e i f i c e p s s s e l n u a v , c 5 2 = c c v 2 1 = t u o v ) v ( 5 d i v4 d i v3 d i v2 d i v1 d i v0 d i v 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 5 7 3 8 . 0 0 0 5 8 . 0 5 2 6 8 . 0 0 5 7 8 . 0 5 7 8 8 . 0 0 0 0 9 . 0 5 2 1 9 . 0 0 5 2 9 . 0 5 7 3 9 . 0 0 0 5 9 . 0 5 2 6 9 . 0 0 5 7 9 . 0 5 7 8 9 . 0 0 0 0 0 . 1 5 2 1 0 . 1 0 5 2 0 . 1 5 7 3 0 . 1 0 0 5 0 . 1 5 2 6 0 . 1 0 5 7 0 . 1 5 7 8 0 . 1 f f o f f o 0 0 0 1 . 1 5 2 1 1 . 1 0 5 2 1 . 1 5 7 3 1 . 1 0 0 5 1 . 1 5 2 6 1 . 1 0 5 7 1 . 1 5 7 8 1 . 1 0 0 0 2 . 1 5 2 1 2 . 1 0 5 2 2 . 1 5 7 3 2 . 1 0 0 5 2 . 1 5 2 6 2 . 1 0 5 7 2 . 1 5 7 8 2 . 1 0 0 0 3 . 1 5 2 1 3 . 1 0 5 2 3 . 1 5 7 3 3 . 1 0 0 5 3 . 1 5 2 6 3 . 1 0 5 7 3 . 1 5 7 8 3 . 1 0 0 0 4 . 1 5 2 1 4 . 1 0 5 2 4 . 1 5 7 3 4 . 1 0 0 5 4 . 1 5 2 6 4 . 1 0 5 7 4 . 1 5 7 8 4 . 1 0 0 0 5 . 1 5 2 1 5 . 1 0 5 2 5 . 1 5 7 3 5 . 1 0 0 5 5 . 1 5 2 6 5 . 1 0 5 7 5 . 1 5 7 8 5 . 1 0 0 0 6 . 1
10 ? 2005 semtech corp. www.semtech.com power management sc2643vx applications information- output voltage (cont) e g a t l o v t u p t u o 8 - k t . ) g n i t a o l f r o ( h g i h = 1 ; d n g = 0 : d e i f i c e p s s s e l n u a v , c 5 2 = c c v 2 1 = 4 d i v3 d i v2 d i v1 d i v0 d i vv t u o ) v ( 00000 0 5 5 . 1 0000 1 5 2 5 . 1 000 10 0 0 5 . 1 000 11 5 7 4 . 1 00 100 0 5 4 . 1 00 10 1 5 2 4 . 1 00 110 0 0 4 . 1 00 111 5 7 3 . 1 0 1000 0 5 3 . 1 01001 5 2 3 . 1 01010 0 0 3 . 1 01011 5 7 2 . 1 01100 0 5 2 . 1 01101 5 2 2 . 1 0 1110 0 0 2 . 1 0 1111 5 7 1 . 1 10000 0 5 1 . 1 1000 1 5 2 1 . 1 10 0 10 0 0 1 . 1 10 0 1 1 5 7 0 . 1 10 10 0 0 5 0 . 1 10 10 1 5 2 0 . 1 10 1 10 0 0 0 . 1 10 111 5 7 9 . 0 11000 0 5 9 . 0 1100 1 5 2 9 . 0 110 10 0 0 9 . 0 110 11 5 7 8 . 0 11100 0 5 8 . 0 1110 1 5 2 8 . 0 11110 0 0 8 . 0 11111 f f o
11 ? 2005 semtech corp. www.semtech.com power management sc2643vx this land pattern is for reference purposes only. consult your manufacturing group to ensure your company's manufacturing guidelines are met. notes: 1. (.222) (5.65) z g y p (c) 4.10 .161 0.65 .026 0.40 .016 1.55 .061 7.20 .283 x inches dimensions z p y x dim c g millimeters l (l1) c 01 gage plane see detail detail a a 0.25 .026 bsc .252 bsc 24 .004 .169 .303 .173 .307 .007 - 24 0.10 0.65 bsc 6.40 bsc 4.40 7.80 - .177 .311 4.30 7.70 .012 0.19 4.50 7.90 0.30 bxn 2x n/2 tips seating aaa c e/2 indicator pin 1 2x 1 3 2 n reference jedec std mo-153, variation ad. 4. inches b n ccc aaa bbb 01 e1 e l l1 e d c a2 a1 dim a min max millimeters min dimensions nom max nom e a a2 a1 e1 bbb c a-b d ccc c dimensions "e1" and "d" do not include mold flash, protrusions 3. or gate burrs. datums and to be determined at datum plane controlling dimensions are in millimeters (angles in degrees). -b- notes: 1. 2. -a- -h- side view (.039) .004 .008 - .024 - - - - 0 .018 .003 .031 .002 - 8 0 0.20 0.10 - 8 0.45 0.09 0.80 0.05 .030 .007 .047 .042 .006 - (1.0) 0.60 - 0.75 0.20 - - - 1.20 1.05 0.15 a b c d e e/2 h plane d contact information semtech corporation power management products division 200 flynn rd., camarillo, ca 93012 phone: (805)498-2111 fax (805)498-3804 outline drawing - tssop-24 land pattern - tssop-24

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