Description
SYNC/SD 13
RT 14
1.8 V(MIN)
1.24 V VREF
PWM OSC
VPUMP 7
VIN 9
CHARGE PUMP
VPUMP
8 CP
3 VOUT
2 RSEN RECT
4
ANTI
CROSS COND.
ION
VOUT
50 mV TYP
The UCC39421 family of synchronous
RESET
PWM controllers is optimized to operate
1
from dual alkaline/NiCd cells
Features
- include pulse-by-pulse current limiting, and a low 5-µA quiescent current during shutdown. The UCC39422 incorporates programmable power-on reset circuitry and an uncommitted comparator for low voltage detection. The available packages are 20-pin TSSOP or 20-pin N for the UCC39422, and 16-pin TSSOP or 16-pin N for the UCC39421.
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)Ĕ}
Supply Voltage (VIN, VOUT,VPUMP).
UCC39421-Unitrode.pdf