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MAX15038 Datasheet(PDF) 9 Page - Maxim Integrated Products |
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MAX15038 Datasheet(HTML) 9 Page - Maxim Integrated Products |
9 / 19 page 4A, 2MHz Step-Down Regulator with Integrated Switches _______________________________________________________________________________________ 9 Pin Description PIN NAME FUNCTION 1 MODE Functional MODE Selection Input. See the MODE Selection section for more information. 2VDD 3.3V LDO Output. Supply input for the internal analog core. Connect a low-ESR, ceramic capacitor with a minimum value of 2.2µF from VDD to GND. 3 CTL1 4 CTL2 Preset Output-Voltage Selection Inputs. CTL1 and CTL2 set the output voltage to one of nine preset voltages. See Table 1 and the Programming the Output Voltage (CTL1, CTL2) section for preset voltages. 5 REFIN External Reference Input. Connect REFIN to SS to use the internal 0.6V reference. Connecting REFIN to an external voltage forces FB to regulate to the voltage applied to REFIN. REFIN is internally pulled to GND when the IC is in shutdown/hiccup mode. 6SS Soft-Start Input. Connect a capacitor from SS to GND to set the startup time. Use a capacitor with a 1nF minimum value. See the Soft-Start and REFIN section for details on setting the soft-start time. 7 GND Analog Ground Connection. Connect GND and PGND together at one point near the input bypass capacitor return terminal. 8 COMP Voltage Error-Amplifier Output. Connect the necessary compensation network from COMP to FB and OUT. COMP is internally pulled to GND when the IC is in shutdown/hiccup mode. 9FB Feedback Input. Connect FB to the center tap of an external resistive divider from the output to GND to set the output voltage from 0.6V to 90% of VIN. Connect FB through an RC network to the output when using CTL1 and CTL2 to select any of nine preset voltages. 10 OUT Output-Voltage Sense. Connect to the converter output. Leave OUT unconnected when an external resistive divider is used. 11 FREQ Oscillator Frequency Select. Connect a precision resistor from FREQ to GND to select the switching frequency. See the Frequency Select (FREQ) section. 12 PWRGD Open-Drain, Power-Good Output. PWRGD is high impedance when VFB rises above 92.5% (typ) of VREFIN and VREFIN is above 0.54V. PWRGD is internally pulled low when VFB falls below 90% (typ) of VREFIN or VREFIN is below 0.54V. PWRGD is internally pulled low when the IC is in shutdown mode, VDD is below the internal UVLO threshold, or the IC is in thermal shutdown. 13 BST High-Side MOSFET Driver Supply. Internally connected to IN through a pMOS switch. Bypass BST to LX with a 0.1µF capacitor. 14, 15, 16 LX Inductor Connection. All LX pins are internally shorted together. Connect all LX pins to the switched side of the inductor. LX is high impedance when the IC is in shutdown mode. 17–20 PGND Power Ground. Connect all PGND pins externally to the power ground plane. Connect all PGND pins together near the IC. 21, 22, 23 IN Input Power Supply. Input supply range is from 2.9V to 5.5V. Bypass IN to PGND with a 22µF ceramic capacitor. 24 EN Enable Input. Logic input to enable/disable the MAX15038. —EP Exposed Pad. Solder EP to a large contiguous copper plane connected to PGND to optimize thermal performance. Do not use EP as a ground connection for the device. |
Similar Part No. - MAX15038_09 |
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Similar Description - MAX15038_09 |
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