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LTC3555
High Efficiency USB Power Manager + Triple Step-Down DC/DC, 4.2V float, QFN-28
Schematic Symbol
Pin Configuration (29 pins)
| Pin | Name | Type |
|---|---|---|
| 1 | LDO3V3 | power_out |
| 2 | CLPROG | passive |
| 3 | NTC | passive |
| 4 | FB2 | input |
| 5 | V_{IN2} | power_in |
| 6 | SW2 | power_out |
| 7 | EN2 | input |
| 8 | DV_{CC} | power_in |
| 9 | SCL | input |
| 10 | SDA | bidirectional |
| 11 | V_{IN3} | power_in |
| 12 | SW3 | power_out |
| 13 | EN3 | input |
| 14 | FB3 | input |
| 15 | ~{RST3} | open_collector |
| 16 | EN1 | input |
| 17 | SW1 | power_out |
| 18 | V_{IN1} | power_in |
| 19 | FB1 | input |
| 20 | PROG | passive |
| 21 | ~{CHRG} | open_collector |
| 22 | GATE | output |
| 23 | BAT | power_out |
| 24 | V_{OUT} | power_out |
| 25 | VBUS | power_in |
| 26 | SW | power_out |
| 27 | I_{LIM0} | input |
| 28 | I_{LIM1} | input |
| 29 | GND | power_in |
Footprint
ConfirmedPackage_DFN_QFN/QFN-28-1EP_4x5mm_P0.5mm_EP2.65x3.65mm
Pad Layout
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Pads (35)
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| 29 | smd |