LT1158ISW Linear Technology, LT1158ISW Datasheet
LT1158ISW
Specifications of LT1158ISW
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LT1158ISW Summary of contents
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... PWM and DC opera- tion. The gate-to-source voltages are internally limited to 14.5V when operating at higher supply voltages. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5365118. ...
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... LT1158CSW LT1158CSW#TR LT1158ISW LT1158ISW#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi label on the shipping container. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ...
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... T J dissipation P according to the following formulas: D × 70°C/W) LT1158IN, LT1158CN × 110°C/W) LT1158ISW, LT1158CSW The denotes the specifi cations which apply over the full operating + = 25°C. Test Circuit V16 = 12V, V11 = V12 = V13 = 0V, Pins 1 and 4 open 30V, V16 = 15V ...
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LT1158 TYPICAL PERFORMANCE CHARACTERISTICS DC Supply Current V13 = INPUT HIGH + V13 = V 10 INPUT LOW ENABLE LOW ...
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TYPICAL PERFORMANCE CHARACTERISTICS Current Limit Inhibit V Threshold DS 1.50 V2 – V11 1.45 1.40 1.35 1.30 –40°C 1.25 +25°C 1.20 +85°C 1.15 1.10 1.05 1. SUPPLY VOLTAGE (V) LT1158 G10 Top ...
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LT1158 PIN FUNCTIONS BOOST DR (Pin 1): Recharges and clamps the bootstrap capacitor to 14.5V higher than pin 13 via an external diode (Pin 2): Main supply pin; must be closely decoupled to the ground pin 7. BIAS ...
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BLOCK DIAGRAM + V BOOST BIAS 3 BIAS GEN 25μA + ENABLE 4 7.5V 2.7V – 1.2V FAULT 5 7. INPUT – 1.4V R GND CHG PUMP ...
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LT1158 TEST CIRCUIT 150Ω 0.01μ 10μ 1/2W V6 50Ω OPERATION (Refer to Functional Diagram) The LT1158 self-enables via an internal 25μA pull-up on the enable pin 4. When pin 4 is pulled ...
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OPERATION (Refer to Functional Diagram) goes low in PWM operation, and is maintained by the charge pump when the top MOSFET is on DC. A regulated boost driver at pin 1 employs a source-referenced 15V clamp that prevents the bootstrap ...
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LT1158 APPLICATIONS INFORMATION If individual gate decoupling resistors are used, the gate feedback pins can be connected to any one of the gates. Driving multiple MOSFETs in parallel may restrict the operating frequency at high supply voltages to prevent over-dissipation ...
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APPLICATIONS INFORMATION Ugly Transient Issues In PWM applications the drain current of the top MOSFET is a square wave at the input frequency and duty cycle. To prevent large voltage transients at the top drain, a low ESR electrolytic capacitor ...
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LT1158 APPLICATIONS INFORMATION 100 90 FIGURE 12 CIRCUIT V = 12V 0.5 1.0 1.5 2.0 2.5 OUTPUT CURRENT (A) Figure 4. Typical Effi ciency Curve for Step-Down Regulator with Synchronous Switch One fundamental difference in ...
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APPLICATIONS INFORMATION Low Current Shutdown The LT1158 may be shutdown to a current level of 2mA by pulling the enable pin 4 low. In this state both the top and bottom MOSFETs are actively held off against any transients which ...
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LT1158 APPLICATIONS INFORMATION of the LT1158 current limit loop, an initial current spike of from times the fi nal value will be present for a few μs, followed by an interval in which I spike is normally ...
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APPLICATIONS INFORMATION Note that for the fi rst event only, t SHUTDOWN twice the above value since C is being discharged all EN the way from its quiescent voltage. Allowable values for R are from zero to 10k. F 7.5V ...
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LT1158 APPLICATIONS INFORMATION from a true short. This is done by using the current limit to control cold fi lament current in conjunction with the self- protection circuit of Figure 9. The reduced cold fi lament current also extends the ...
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TYPICAL APPLICATIONS 0.33μF 16k 0.01μ 200pF 2 7 LT1431 3 6 4.99k 3.3k 1000pF CMOS 24k 555 2.90V 3.05V 3.30V 3.45V 3.60V OUT ...
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LT1158 TYPICAL APPLICATIONS 4.7k 0.01μF 4. 0.1μ 10μ EXT SYNC 30k 25kHz 2.2nF LT3525 5 12 0.01μ 27k 10 7 1μF 510Ω ADD ...
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TYPICAL APPLICATIONS + 1N4148 STOP (FREE RUN) + PWM Figure 15. High Effi ciency 6-Cell NiCd Protected Motor Drive LT1158 ENABLE FAULT INPUT 5V SHUTDOWN PWM CONTROLS LT1158 INPUTS 16 1 BOOST DR BOOST GATE ...
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LT1158 TYPICAL APPLICATIONS 1 BOOST 0.01μF 3 BIAS 4 ENABLE A ENABLE + 10μF 5 FAULT FAULT A 6 INPUT A INPUT 7 GND 8 B GATE FB 1 BOOST 0.01μF 3 ...
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... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...
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... ENABLE T SOURCE LT1158 6. FAULT SENSE 51Ω – INPUT SENSE GND GATE FB B GATE DR www.linear.com ● 12V + 1000μF IRCZ44 + – 12V MBR330 55W I : 10A 50ms SHUTDOWN t = 600ms RESTART LT1158 F18 LT 0309 REV B • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1994 1158fb ...