R1223N152A RICOH [RICOH electronics devices division], R1223N152A Datasheet - Page 2

• Manufacturer Part Number: R1223N152A
• Description: PWM/VFM Step-down DC/DC Converter
• Manufacturer: RICOH [RICOH electronics devices division]

n n n n BLOCK DIAGRAM
V
Rev. 1.11
EXT
n n n n SELECTION GUIDE
IN
Code
a
b
d
c
The selection can be made by designating the part number as shown below;
In the R1223N Series, the output voltage, the oscillator frequency, the optional function, and the taping type for
the ICs can be selected at the user’s request.
12345
R1223NXXXX-XX
Setting Output Voltage(V
Stepwise setting with a step of 0.1V in the range of 1.5V to 5.0V is possible.
Designation of Oscillator Frequency
2 : fixed
Designation of Optional Function
A : 300kHz, with a PWM/VFM alternative circuit, Latch-type protection
B : 500 kHz, with a PWM/VFM alternative circuit, Latch-type protection
C : 300kHz, without a PWM/VFM alternative circuit, Latch-type protection
D : 500kHz, without a PWM/VFM alternative circuit, Latch-type protection
E : 300kHz, with a PWM/VFM alternative circuit, Reset-type protection
F : 500 kHz, with a PWM/VFM alternative circuit, Reset-type protection
G : 300kHz, without a PWM/VFM alternative circuit, Reset-type protection
H : 500kHz, without a PWM/VFM alternative circuit, Reset-type protection
Designation of Taping Type; Ex. :TR,TL(refer to Taping Specification)
”TR” is prescribed as a standard.
PWM/VFM
CONTROL
- - - -
a b c d
GND
OSC
OUT
Protection
Soft Start
):
Vref
- 2 -
Contents
Chip Enable
V
CE
OUT