R1232D Datasheet, PDF (2/24 Pages) RICOH electronics devices division – PWM STEP-DOWN DC/DC CONVERTER WITH SYNCHRONOUS RECTIFIER

R1232D
BLOCK DIAGRAMS
R1232Dxx1A/B
VDD
3
AGND
7
VIN 2
LX ₈
Current Limit
Slope
Compensation
Phase
Compensation
Output
Contorol
QR
S PWM
Comparator
Vref
Error
Amplifer
Oscillator
Soft Start
1
PGND
TEST Circuit
UVLO
6
TEST “L” or GND Fixed
Chip Enable
5 _VOUT
4 CE
“H” Active
R1232D001C/D
VDD
3
AGND
7
VIN 2
LX ₈
Current Limit
Slope
Compensation
Phase
Compensation
Output
Contorol
QR
S PWM
Comparator
Vref
Error
Amplifer
Oscillator
Soft Start
1
PGND
TEST Circuit
UVLO
6
TEST “L” or GND Fixed
Chip Enable
5 _VFB
4 CE
“H” Active
2