LT1611CS5 LINER [Linear Technology], LT1611CS5 Datasheet
LT1611CS5
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LT1611CS5 Summary of contents
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FEATURES Very Low Noise: 1mV Output Ripple P–P – 150mA from a 5V Input Better Regulation Than a Charge Pump Effective Output Impedance: 0.14 Uses Tiny Capacitors and Inductors Internally Compensated Fixed Frequency 1.4MHz Operation Low Shutdown Current: ...
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... Note 3: Current limit guaranteed by design and/or correlation to static test. Slope compensation reduces current limit at higher duty cycle INFORMATION ORDER PART NUMBER TOP VIEW LT1611CS5 4 SHDN S5 PACKAGE S5 PART MARKING LTES = 125 C, = 256 C/W JA unless otherwise noted. IN MIN TYP MAX ...
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W U TYPICAL PERFOR A CE CHARACTERISTICS Efficiency – 5V OUT 100 125 LOAD CURRENT (mA) 1611 G01 ...
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LT1611 PIN FUNCTIONS SW (Pin 1): Switch Pin. Minimize trace area at this pin to keep EMI down. GND (Pin 2): Ground. Tie directly to local ground plane. NFB (Pin 3): Negative Feedback Pin. Minimize trace area. ...
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U OPERATIO boost converter, generating a negative output voltage, which is directly regulated. The circuit schematic is de- tailed in Figure 3. Only one inductor is required, and the two diodes can single SOT-23 package. Output noise ...
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LT1611 U OPERATIO Figure 5. Switch-On Phase of Inverting Converter. L1 and L2 Current Have Positive dI/ Figure 6. Switch-Off Phase of Inverting Converter. L1 and ...
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U OPERATIO C2 L1A SHDN + LT1611 C1 NFB GND R2 10k C1: AVX TAJB226M010 C2: TAIYO YUDEN LMK212BJ105MG C3: SEE TEXT D1: MBR0520 L1A, L1B: SUMIDA ...
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LT1611 U OPERATIO In Figure 11 (also shown on the first page), output capaci- tor C3 is replaced by a ceramic unit. These large value ceramic capacitors have ESR of about 2m and result in very low output ripple. At ...
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U OPERATIO Start-Up/Soft-Start The LT1611, starting from V = 0V, reaches final voltage OUT in approximately 450 s after SHDN is pulled high, with and V = – 5V. Charging the output OUT ...
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LT1611 U OPERATIO Output Current The LT1611 will deliver 150mA at – 5V from a 5V 10% input supply higher voltage supply is available, more output current can be obtained. Figure 17’s schematic shows how to get more ...
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U OPERATIO Capacitors As described previously, ceramic capacitors can be used with the LT1611 provided loop stability is considered. For lower cost applications, small tantalum units can be used. A value acceptable, although larger capacitance values ...
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LT1611 U TYPICAL APPLICATIO S 4-Cell to –10V Inverting Converter C2 L1A LT1611 68.1k SHUTDOWN SHDN NFB GND 10k C1: AVX TAJB226M010 (803) 946-0362 C2: TAIYO YUDEN ...