POWER INTEGRATED CIRCUIT Switching Regulator 5 Amp Positive and Negative Power Output Stages FEATURES Designed and characterized for switching regulator applications PiC600 PIC601 PIC602 PIC610 PIC611 PIC612 Cost saving design reduces size, improves efficiency, reduces naise and RFI (See note 4.) High operating frequency (to > 100kHz) results in smaller inductor-capacitor filter and improved power supply response time High operating efficiency: Typical 2A circuit performance Rise and Fall time <75ns Efficiency >85% No reverse recovery spike generated by commutating diode (See note 4. and Fig. 2.) Electrically isolated, 4-Pin, TO-66 hermetic case (500V, 1yA, all leads common) DESCRIPTION The Microsemi ESP Switching Regulator is a unique hybrid transistor circuit, specifically designed, constructed and speci- fied for use in high current switching regulator applications. The designer is thus relieved of one of the most time consum- ing, tedious and critical aspects of switching regulator design: choosing the appropriate switching transistors and commutat- ing diode and empirically determining the optimum drive and bias conditions. Switching regulators, when compared to conventional regula- tors, result in significant reductions in size, weight and internal power losses and a major decrease in overall cost. Using the Microsemi P|C600 series, the designer can achieve further improvements in size, weight, efficiency and costs. At the same time, because of the PIC600 series design and packag- ing, the designer is aided in overcoming two of the most signifi- cant drawbacks to switching regulators: noise generation and slow response time; there is, in fact, no diode reverse recovery spike (see note 4.). The PIG600 series switching regulators are designed and characterized to be driven with standard integrated circuit volt- age regulators. They are completely characterized over their entire operating range of -55C to +125C. The devices are enclosed in a special 4-pin TO-66 package, hermetically sealed for high reliability. The hybrid circuit construction utilizes thick film resistors on a beryllia substrate for maximum thermal conductivity and resultant low thermal impedance. Alt of the active elements in the hybrid are fully passivated. Application Notes U-68 and U-76 provide a detailed descrip- tion of the hybrid circuit and design guidance for specific circuit applications. CHEMATI PIC600 s c PIC610 PIC6O1 PIC611 Pos. 4 PIco02 1 POS. NEG. 4 Pic12 1 _NEG. INPUT OUTPUT INPUT OUTPUT 3 2 3 2 DRIVE COMMON DRIVE COMMON MECHANICAL SPECIFICATIONS NOTES: F1C600 PIC6O1 PIC602 PIC&10 PIC611 PIC61Z 4-Pin TO-66 1. Case is electrically isolated. 2. Loads may be soldered to within 1),6" of base provided temperature- lime exposure is less than 260C ins. mm | for 10 seconds. | A | 620 Max 18.75 MAX. } 8} 050-075 | B Cc | 028-094 | C ) 2 I~ | jey- DRIVE(3) D | .98a-.962 24.93-24.43 \ Cc a} INPUT(4) | e [soz [aeaess Tr E / G & | San wax tao [aaa a Ra A - D {i f H | 570-590 1448-1499 | t H [ 142-,152 DIA. 3,613.86 DIA. K [360 MIN, fasa MIN, COMMON(2) J u | 280-340 6.38-8.64 L K ourpuTd) Mi / fcrosem/ Corp. Watertown 8/78 7-4 The diode expertsPIC600 PIC601 PIC602 PIC610 PIC611 PIC612 ABSOLUTE MAXIMUM RATINGS Piceoo PIC6O1 PIC602 PIC1O Picstt PICe12 Input Voltage, V,.. -....- .. 60V. 100V Output Voltage, V,., .. 60V. 100V Drive-Input Reverse Voltage, V;_, BV 5V Output Current, |, .. DA... . 5A Drive Current, by osccccccscccccteceenesseersceesnetreie OA scence: DZ A reese: SO 2A cece QA eis QA eens 0.2A Thermal Resistance Junction to Case, 6). Power Switch o.oo . coecttiicanieeinee a bees we ADCP Wooo ces ccee cee netarneesvenenanees Commutating Diode ooo... coeet ttt ittee voces tittttcsientvensteeesse voce AOE CPW occ te tenses nesses Case to Ambient, Bo gcc ecten tenets aennaetcttcn ge ptcetcccestanvactcctiaseaencnsennaiiat caanvanianennia 60.0C/W... voces ceiettasitstesenevcaseees Operating Temperature Range, T. cc cecte etter ensiniicetetesrulssuicinesittseicisaisssevensl voce 55C tO 4 125C . Maximum Junction Temperature, qj besten cece cteete tee bee eeet coe ctsetetteecentattevaceeseteee cece PLEO Ce ete ete Storage Temperature Range ............ tessa cee ttntcteettntteeneees cettesniceetineersescetearerncascennsees OBE 0 $1509 Coes cece ternerinee ELECTRICAL SPECIFICATIONS (at 25C untess noted) PIC600, 601, 602 PIC610, 611, 612 Test Symboi | Min.| Typ.,| Max. | Min. [ Typ. | Max. | Units Conditions Current Delay Time toi | 20 49 | | 20 | 40 ns V,, 25v(25V) Current Rise Time 1; | 50} 75 | | 50 | 75 ns Vout == 5V(SY) Voltage Rise Time ty ~ |}30} 50; | 30 | 50 | ns | 1,,, = 2At-2A) Voltage Storage Time ty, |700; | | 700; ns |, = 20mA(20mA) NOTE 5 Voltage Fall Time t,, {501} 7 | | 50 | 75 ns See Figure 2. Current Fall Time ty |70} 150] ; 70 | 150 ns See notes 1, 2. 4. Efficiency (Notes 2. & 4.) n | 85 ~ | 8 | % On-State Voltage (Note 3.) V4. 14on} | 1.0 15 | }|1.0)/-15 Vv |, = 2A(2A), |, = .02A(.02A) NOTE 5 On-State Voltage (Note 3.) Vertom | ~ | 25) 35} |-25/-35) V 1, = 5A(5A), |, = .02A(.02A) NOTE 5 Diode Forward Voltage (Note 3.) | Vision, | | 8 10} | 8]1.0 v |, = 2A(2A) : Diode Forward Voltage (Note 3.) { Vojjony) | | 10) 15) |10)15 v 1, = 5A(5A) Off-State Current (4-5 101 10 | |0.1/ 10 BA , = Rated input voltage _ Off-State Current ha 110 } )-0) pA | V, = Rated input voltage, T, = 100C Diode Reverse Current 15 410 10 ~ ;10] 10 BA | == Rated output voltage Diode Reverse Current les |500 | | 500] ~ aA V, = Rated output voltage, T, = 100C NOTES: 1. In switching an inductive load, the current will lead the voltage on turn on and lag the voitage on turn-off (see Figure 2.). Therefore, Voltage Delay Time (toy) = tai + tri and Current Storage Time (tsi) = tsv + tt. 2. The efficiency is a measure of interna! power losses and is equal to Output Power divided by Input Power. The switching speed circuit of Figure 1., in which the efficiency is measured, is representative of typical operating conditions for the PIC600 switching regulators. . Pulse test: Duration = 300gs, Duly Cycie = 2%. 4, As can be seen from the switching waveforms shown in Figure 2., no reverse of forward recovery spike is generated by the commutating diode during switching! This reduces self-generated noise, since no current spike is fed through the switching regulator. It also improves efficiency and reliabilty, since the power switch only carries current during turn-on. 5. To insure safe operation Ig should be =|20mA| during Tan. Operation at ig <|20mA| can permanently damage device. iw POWER DISSIPATION CONSIDERATIONS The total power losses in the switching regulator is the sum of the switching losses, and the power switch and diode D.C. losses. Once total power dissipation has been determined, the Power Dissipation curve, or thermal resistance data may be used to determine the allawable case or ambient temperature for any operating condition. The switching losses curve presents data for a frequency of 20KHz. To find losses at any other frequency, multiply by f/20KHz. The D.C. losses curve presents data fora duty cycle af .2. To find O.C. losses at any other duty cycle, multiply by D/.2 forthe power switch and by (1-D)/.8 forthe diode. At frequencies much below 10KH2z the above method for determining the allowable case or ambient temperature becomes invalid and a detailed transient thermal analysis must be performed. 580 PLEASANT STREET WATERTOWN, MA 02172 TEL. (617) 926-0404 - FAX (617) 924-1235 7-5 PRINTED IN U.S.A.Vi, = +25V " 2 - + AQ 4 ; plesoo + R = PIc6O1 , Le et Picse2 2sg = torre = 20mA 3 W2 Pulse Width = 1045 _ Rep. Rate = 20kHz 12K +25V - ~ ~ ov Ww Figure 1. PIC600, 601, 602 Switching Speed Circuit PIC600 PIC601 PIC602 PIC610 PIC611 PIC12 t POWER SWITCH i r T,. 10284 Tope ~ ORS st Note: No Diode Reverse or Forward Recovery Spike (See note 4.) Figure 2. PIC600, PIC601, PIC602 Switching Waveforms Note: PICGIO, PICG11, PIC612 Test Circuit and waveforms are identical but of opposite polarity (,, = 25V, Vy == 8V, Nog, = +20mA). On-State Characteristics 5 = 4 | 5 TYPICAL | ! a : MAXIMUM e 3 5 oO ui # = h 2 t 5 T, = 25C 1, = 20mA 4 0 iL | a 1 2 3 4 5 V,_,(on) ON-STATE VOLTAGE () Turn-On Time 1000 ' 1 itd AS measured in circuit shown in 500 -- Figure 1. 400 | Vv. 25V 300 + Yo. = SV 200 [- T) = 25C 100 t TIME (ns} 50 ' i 40 30 20 10 I J 21 2 3 4.5 1, OUTPUT CURRENT {A) ' 8 wo a a 580 PLEASANT STREET WATERTOWN, MA 02172 TEL. (617) 926-0404 FAX (617) 924-1235 77 Diode Forward Characteristics i TYPICAL MAXIMUM |, DIODE FORWARD CURRENT (A) i 0 a] 1 1.5 2 2.5 v. DIODE FORWARD VOLTAGE (V) 2-tion Fall Time 1009 As measured in circuit shown in 500 Figure 1. 400} Vn 300 200 109 50 40 30 t)- FALL TIME (ns) 20 10 5 6 FBI 2 3 465 1, OUTPUT CURRENT (A) PRINTED IN U.S.A.