Datasheet Linear Technology LTC3410BESC6-1.8#PBF — 数据表

LTC3410B
2.25MHz, 300mA
Synchronous Step-Down
Regulator in SC70
U FEATURES DESCRIPTIO ■ The LTC ®3410B is a high efficiency monolithic synchronous buck regulator using a constant frequency, current
mode architecture. The device is available in adjustable
and fixed output voltage versions. Supply current during
operation is only 200µA, dropping to 1µF) supply bypass capacitors. The
discharged bypass capacitors are effectively put in parallel
with COUT, causing a rapid drop in VOUT. No regulator can
deliver enough current to prevent this problem if the load
switch resistance is low and it is driven quickly. The only
solution is to limit the rise time of the switch drive so that
the load rise time is limited to approximately (25 • CLOAD).
Thus, a 10µF capacitor charging to 3.3V would require a
250µs rise time, limiting the charging current to about
130mA. 3410bfa 11 LTC3410B U W U U APPLICATIO S I FOR ATIO
PC Board Layout Checklist When laying out the printed circuit board, the following
checklist should be used to ensure proper operation of the
LTC3410B. These items are also illustrated graphically in
Figures 4 and 5. Check the following in your layout:
1. The power traces, consisting of the GND trace, the SW
trace and the VIN trace should be kept short, direct and …