LSH-6335 SEMTECH | Alldatasheet
Document overview
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Technical content
3 AMP DC-TO-DC Ls#-6335
roan rs rd MAXIMUM RATINGS y Input Voltage Vu | 35 | Volts # ® LSH-6335 | 4 | 1 - LSH-6435 | {Limited
FEATURES
« Military temperature range ala ate 1 \\* « Complete DC-to-DC converter 70-220 — 2510 125 | | ¢ 70% minimum efficiency 108 = 85 t0 150 % ~ 65 t0 150 « Programmable output voltage from 5 to 70-220 25 to 125 | ee Preset output voltage of 5.05 Volts (Soldering) | +15% 10 Sec. for TO-220 20} ¢ Current limit and thermal shutdown, 50 See. for TOS so ¢ Inhibit/enable control pin DEVICE SELECTION GUIDE DESCRIPTION ee The LSH-6335/LSH-6435 switching regulator is a micro-hybrid circuit designed for use in step-down [usH-eaasp [| 40 | 31 | Straightin-tine | applications requiring accurate output voltages over combined variations of line, load and temperature. This unique product greatly simplifies switching power supply design. The LSH-6335/LSH-6435 microconverter includes a switching BLOCK DIAGRAM regulator, catch diode and compensation wu network within a TO-220 style package. Vow Just add a choke and two capacitors to > obtain an efficient DC-to-DC converter for Fs 5 Volts at 3 Amps. To increase the output par] voltage, simply add a programming mau resistor. The current limit and thermal tho “Ga shutdown features of the LSH-6335/ é LSH-6435 fully protect the device against overstress conditions. T In order to accommodate various ee) mounting and operating temperature in-line, staggered vertical mount and requirements, the LSH-6335 and staggered horizontal mount. A full military LSH-6435 are available in 4 package temperature range hermetic TO-3 options. The LSH-6335 is offered in 3 together with inhibit/enable control pin is TO-220 style lead formations: straight also available in the LSH-6435. 11-9
ELECTRICAL CHARACTERISTICS
Input test conditions are as follows: Vy = 24VDC, Vo = SVDC, Ip = 3A, T, = 25°C, unless otherwise specified. Test Conditions [test Limits ] [Wa [1 nium ypc] waximam | unus_| Output Vo 5mA 4.97 5.13 | Volts Voltage? 12V to Viaasa| 0.3A to 3A_| Over Temp | 4.80 5.30 i Load System Switching Quiescent Peak Current Limit | ey Over Temp Amps Knee Short Circuit fermi | be [Tes | | Output Noise and Ripple* 1sH-6335 | YY 130V + Vee ox MV oxoK LSH-6435 35V + 5Viscox Turn On Unit Step 5mA to 3A o | mV Load Change 3A to 0.058 250_| TV pe Programmint | Low duty cycle, pulse testing with Kelvin connections required. (2)40mS duration. (Vg programming above 5.05V to 27V. «1180 Hz input ripple. ‘)Over temperature — 25°C to 125°C for TO-220; — 55°C to 150°C for TO-3. MILITARY SCREENING 100% screened in accordance with MIL-STD-883, Method 5004 Class B MIL-STD-883 [ Seren Test Method [Internal Visual [Temperature Gycling | Constant Acceleration a Hermeticity [4 | Burn-in [ots [Beernal Viva [2000 | SEMTECH CORPUS CHRISTI 11-10
3 AMP DC-TO-DC LSH-6335
POWER DERATING POWER DISSIPATION VS INPUT VOLTAGE 12 12 PPT tt td jerome | TTT 10) 10 Pyeemn LE gs g | INI 2 8 PLT RETT é Q lesb Fa 6 \\ & 6lvo-s5vy,3a— 14 Po eA ERT g 4 PAA G4 }Vo = 12V, 1.58 I = ee eS 1 |
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de | INN : | | | =55° 550-75 ~100~*125~—~*150 510 i520 25 30 38 40 CASE TEMPERATURE () INPUT VOLTAGE (VOLTS) CURRENT LIMIT VS. PERCENT Vour " EFFICIENCY VS OUTPUT VOLTAGE Nee : ae 5 eo SRT ea a E \\\\ ef = \\\\ a en oe 5 7 Ni 2 neZ lo = 0.05A SING ie i re Sons Ge CEE oO 02 04 0.6 os 1 PERCENT voUT x100 0 5 1 15 2 25 30 EFFICIENCY VS INPUT VOLTAGE OUTPUT VOTAGE OUTS) “ __] es x fomet | ss Le TYPICAL APPLICATION Vo 12, 3A DC-TO-DC STEP-DOWN CONVERTER"? = a9 (Yo= SM 1.5A Va — 7 z tt tsi-xasP u : = ne . SEE aa ) 65 ' Civ = S30KF: Cour = 1000KF
2 For output voltages above 5V, add programming
INPUT VOLTAGE (VOLTS) Wil SEMTECH CORPUS CHRIET!
| DEVICE OUTLINE LSH-6X35P_ LSH-6X35PV LSH-6X35PH (Front View) (Front View) (Front View) LSH-6435 ay ea tes ene gata lots Ba osontuax | 2h nn ae Eo vy onl elf) = Ue ees pasos ° | = 38 esl) eH) tars te ! ole sa ome poy ae aN | £9 \\ Ee w ae \\ (Side View) (Side View) (Side View) seo cad bs owe 7 Ze ra Pe ps PET ee jem oa ORCLE rpaces. > CED 130 0? ode B78 | ag Ne 0916 “ oes | the oe 1s | gots oot oy 7 2 sae aS va_ oaee oe 1—cT 1 — Veense 2 = Small Signal Ground 2-EQ ooh 3 — Small Signal Ground 5_V, 4 — Power Ground & x egnee 5 — Input Tab is Small Signal Ground 3 = ital Ground Case is Small Signal Ground NOTE: All dimensions are in inches.