PFM STEP-UP DC/DC CONVERTER WITH HIGH EFFICIENCY AND LOW NOISE

HT9261(A)

第 3 页共 13 页

BLOCK DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Input voltage range-------------------------------------------------------------------------------0.3V~12V

Input voltage: Vi(LX) ----------------------------------------------------------------------------0.3V~(Vout+0.3)

CE pin voltage-------------------------------------------------------------------------------------0.3V~(Vout+0.3)

Lx pin output current -----------------------------------------------------------------------------0.7A

Maximum power dissipation, Pd T=25℃

SOT-89-3---------------------------------------------------------------------------------------------0.5W

SOT-23-5---------------------------------------------------------------------------------------------0.15W

SOT-23-3---------------------------------------------------------------------------------------------0.15W

Maximum junction temperature ----------------------------------------------------------------150℃

Operating free-air temperature range ------------------------------------------------------- -20~+80℃

Storage temperature range -------------------------------------------------------------------- -40~125℃

Lead temperature and time ----------------------------------------------------------------------260℃,10S

CE

Chip Enable

Reference

Krror Anp

Short-up

logie

Oscillator

Driver

Overcurrent

Conparator

PFM

Control

logic

Vss

LX

OUT