R1230D251B-TL RICOH [RICOH electronics devices division], R1230D251B-TL Datasheet - Page 2

• Manufacturer Part Number: R1230D251B-TL
• Description: PWM/VFM Step-down DC/DC Converter with Synchronous Rectifier
• Manufacturer: RICOH [RICOH electronics devices division]

Lx
Lx
Rev. 1.12
V
V
R1230DXX1A/B
R1230D001C/D
IN
IN
BLOCK DIAGRAM
PGND
PGND
Current Protection
Current Protection
OUTPUT
OUTPUT
CONTROL
CONTROL
PWM/VFM
PWM/VFM
CONTROL
CONTROL
V
V
DD
DD
AGND
AGND
Soft Start
Soft Start
Phase Compensation
Phase Compensation
- 2 -
UVLO
UVLO
OSC
OSC
Vref
Vref
MODE
MODE
Chip Enable
Chip Enable
CE
“L”= PWM
“L”= PWM “H”= VFM
“H”= VFM
“H” Active
“H” Active
CE
CE
V
V
OUT
FB