PSB2121 Datasheet, PDF (1/13 Pages) Siemens Semiconductor Group – General-Purpose Power Controller

General-Purpose Power Controller
(GPPC)
Features
q Switched mode DC/DC-converter
q CCITT ISDN compatible
q Low power dissipation
q Supply voltage range 8 to 70 V
q Programmable input undervoltage protection
q Programmable overcurrent protection
q Soft start
q Power housekeeping input
q Oscillator synchronization input/output
q High voltage CMOS-technology 70 V
PSB 2121
CMOS IC
P-DSO-20-1
P-DIP-16
Type
PSB 2121-P
PSB 2121-T
Version
V A4/A5
V A4/A5
Ordering Code
Q67100-H8646
Q67100-H6032
Package
P-DIP-16
P-DSO-20-1 (SMD)
The PSB 2121 is a pulse width modulator circuit designed for fixed-frequency switching regulators
with very low power consumption.
In telephony and ISDN systems a high conversion yield is crucial to maintain functionality in all
supply conditions via “S” or “U” interfaces. The PSB 2121 design and technology realize high
conversion efficiency and low power dissipation.
It should be recognized that the PSB 2121 can also be used in numerous DC/DC-conversion
systems other than ISDN-power supplies.
Semiconductor Group
1
12.92