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LTM4601AEV-1-PBF Datasheet(PDF) 8 Page - Linear Technology |
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LTM4601AEV-1-PBF Datasheet(HTML) 8 Page - Linear Technology |
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8 / 28 page  LTM4601A/LTM4601A-1 8 4601afb Figure 1. Simplified LTM4601A/LTM4601A-1 Block Diagram MARG1 (Pin D12): This pin is the MSB logic input for the margining function. Together with the MARG0 pin will determine if margin high, margin low or no margin state is applied. The pin has an internal pull-down resistor of 50k. See Applications Information. SGND (Pins H12, H11, G11): Signal Ground. These pins connect to PGND at output capacitor point. See Figure 15. COMP (Pin A11): Current Control Threshold and Error Amplifier Compensation Point. The current comparator threshold increases with this control voltage. The voltage ranges from 0V to 2.4V with 0.7V corresponding to zero sense voltage (zero current). PGOOD (Pins G12, F11): Output Voltage Power Good Indicator. Open-drain logic output that is pulled to ground when the output voltage is not within ±10% of the regula- tion point, after a 25μs power bad mask timer expires. RUN (Pin A10): Run Control Pin. A voltage above 1.9V will turn on the module, and when below 1V, will turn off the module. A programmable UVLO function can be ac- complished with a resistor from VIN to this pin that has a 5.1V zener to ground. Maximum pin voltage is 5V. Limit current into the RUN pin to less than 1mA. VOUT_LCL (Pin L12): VOUT connects directly to this pin to bypass the remote sense amplifier, or DIFFVOUT con- nects to this pin when remote sense amplifier is used. VOUT_LCL can be connected to VOUT on the LTM4601A-1, VOUT is internally connected to VOUT_LCL with 50Ω in the LTM4601A-1. MTP1, MTP2, MPT3 (Pins C10, D10, D11 ): Extra Mounting Pads used for increased solder integrity strength. These pads must remain floating (electrical open circuit). (See Package Description for Pin Assignment) PIN FUNCTIONS SIMPLIFIED BLOCK DIAGRAM + INTERNAL COMP SGND COMP PGOOD RUN VOUT_LCL VIN >1.9V = ON <1V = OFF MAX = 5V MARG1 MARG0 MPGM PLLIN CSS INTVCC DRVCC TRACK/SS VFB fSET 50k 39.2k RSET 40.2k 50k 60.4k VOUT 1M (50Ω, LTM4601A-1) 5.1V ZENER POWER CONTROL Q1 VIN 4.5V TO 20V VOUT 1.5V 12A Q2 10k 10k 10k NOT INCLUDED IN THE LTM4601A-1 VOSNS – = NC1 VOSNS + = NC2 DIFFVOUT = NC3 50k 10k INTVCC 22μF 1.5μF CIN + COUT PGND VOSNS – VOSNS + DIFFVOUT 4601A F01 4.7μF R1 R2 UVLO FUNCTION |
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