LTC3202 LINER [Linear Technology], LTC3202 Datasheet
LTC3202
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LTC3202 Summary of contents
Page 1
... High switching frequency enables the use of small external capacitors. A low current shutdown feature disconnects the load from V than1 A. The LTC3202 is available in the 10-pin MSOP and 3mm 3mm DFN packages. , LTC and LT are registered trademarks of Linear Technology Corporation ...
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... OUT Note 3: The LTC3202E is guaranteed to meet performance specifications from Specifications over the – operating temperature range are assured by design, characterization and correlation with statistical process controls. TOP VIEW ORDER PART NUMBER ...
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... OUT LOAD CURRENT (mA) 0. –40 C 0.40 A 3.9 4.2 4.5 0.38 3202 G01 = –40 C 3.9 4.2 4.5 3202 G03 = 100 3202 G05 LTC3202 V Set Point vs Input Supply FB (400mV Setting LOAD – 2.7 3.0 3.3 3.6 3.9 4.2 4.5 INPUT SUPPLY (V) ...
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... LTC3202 W U TYPICAL PERFOR A CE CHARACTERISTICS V Soft-Start Ramp OUT V D0, D1 2V/DIV V OUT 1V/DIV V = 3.6V 200 s/DIV OUT CTIO S D1, D0 (Pin 1, 10): Control Inputs. D0 and D1 determine the set point voltage of the FB pin (see Table 1). FB (Pin 2 the Feedback Input for the Regulation Control Loop ...
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... W SI PLIFIED BLOCK DIAGRA OUT 3 W – 2-BIT + DAC SOFT-START AND 1.5MHz SHUTDOWN OSCILLATOR CONTROL 5, 11 GND LTC3202 – – 3202 BD 3202fa 5 ...
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... To ensure that their states are defined they must always be driven with valid logic levels. Shutdown Current Output voltage detection circuitry will draw a current when the LTC3202 is in shutdown. This current will be eliminated when the output voltage (V ensure that shutdown a bleed resistor can ...
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... Typical values for total voltage divider resistance can range from several will Charge Pump Strength FB OUT Figure 3 shows how the LTC3202 can be modeled as a Thevenin equivalent circuit to determine the amount of current available from the effective input voltage, 1.5V and the effective open-loop output resistance ...
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... Both the style and value of the output capacitor can significantly affect the stability of the LTC3202. As shown 8 in the block diagram, the LTC3202 uses a control loop to adjust the strength of the charge pump to match the current required at the output. The error signal of this loop is stored directly on the output charge storage capacitor ...
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... Power Efficiency The power efficiency ( ) of the LTC3202 is similar to that of a linear regulator with an effective input voltage of 1.5 times the actual input voltage. This occurs because the input current for a 2:3 fractional charge pump is approxi- mately 1 ...
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... The large dv/dt on these pins can couple energy capacitively to adjacent printed circuit board runs. Magnetic fields can also be generated if the flying capacitors are not close to the LTC3202 (i.e. the loop area is large). To decouple capacitive energy transfer, a Faraday shield may be used. This is a grounded PC trace between the sensitive node and the LTC3202 pins ...
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... DETAIL “A” 0.18 (.007) DD Package 10-Lead Plastic DFN (3mm 3mm) (Reference LTC DWG # 05-08-1699) 0.55 0.05 PIN 1 TOP MARK PACKAGE OUTLINE 0.200 REF LTC3202 3.00 0.102 (.118 .004) 0.497 0.076 (NOTE 3) (.0196 .003 3.00 0.102 4.90 0.152 (.118 .004) (.193 .006) ...
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... LED R2 – + – 3. OUT LTC3202 GND COMMENTS White LEDs 1.8mA White LEDs <1 A, ThinSOT White LEDs <1 A, ThinSOT, SC70 White LEDs, V ...