DC/DC Converter

High Voltage Step-down DC/DC Converters

Product
Name
Ver. Class Package AEC-
Q100
Operating
Temp.
Range
Control Input Voltage
Range
(Absolute Max.)
Output Voltage Range
Voltage Accuracy*1
Frequency Output
Current *2
Protection
Circuit
Remarks Data
Sheet
(PDF)
Design
Guide
(PDF)
R1245S 00xA/G J,A HSOP-8E Compliant -40 to
105°C
PWM   4.5V to 30.0V
(32.0V)
Ext. adjustable
(0.8V to 27.3V)
±8mV
A, B: 330kHz
C, D: 500kHz
E, F: 1MHz
G, H: 2.4MHz 
1.2A Latch type Diode Rectifier
Soft UVLO Thermal
Download
1.13MB
-
00xC/E A
00xB/H J,A Fold back type
00xD/F A
R1245L 00xA/C/E/G A DFN2020-8   Latch type
00xB/D/F/H Fold back type
R1270S 001A/B K,A HSOP-18 Compliant -40 to
125°C
PWM,
PWM/VFM Auto Switching 
3.6V to 34.0V
(36.0V)
Ext. adjustable
(0.8V to 31.6V)
±1%
Ext. adjustable
(300kHz to 2.4MHz)

synchronized externally by PLL
3A Fold back type
(With Latch type )
Diode Rectifier
Soft Start Time Adjustable
PG(FLG) Output
Soft UVLO OVLO Thermal
Download
3.23MB
Download
NEW
R1272S
xxxA A HSOP-18   -40 to
125°C
Forced PWM,
PWM/VFM Auto Switching 
4.0V to 34.0V
(36.0V)
Ext. adjustable
(0.7V to 5.3V)
±1%
250kHz to 1MHz

synchronized externally by PLL
External Latch type
or
Hiccup type
(Reset type)
Synchronous Rectifier
SSCG
PG(FLG) Output
Soft Start Time Adjustable
Soft UVLO OVP Thermal
Download
1.33MB
-

PWM Step-up DC/DC Converters Lineup For LCD/ OLED/ CCD

Product
Name
Ver. Class Package AEC-
Q100
Operating
Temp.
Range
Input Voltage Range
(Absolute Max.)
Output Voltage Range Voltage
Accuracy*1
Frequency Output Tr. Protection
Circuit
Remarks Data
Sheet
(PDF)
R1211N 002B/D A SOT-23-6W   -40 to 85°C 2.5V to 6.0V
(6.5V)
Ext. adjustable  ±15mV B: 700kHz
D: 300kHz
External Latch type B, D: Int. phase compensation.
With stand-by.
Soft UVLO
Download

Step-up and Charge pump DC/DC Converters Lineup For LCD/ OLED/ CCD

Product
Name
Class Package AEC-
Q100
Operating
Temp.
Range
Input Voltage Range
(Absolute Max.)
Frequency CH Control Output Voltage Range Voltage
Accuracy*1
Lx Current
Limit*3
Remarks Data
Sheet
(PDF)
R1290K A QFN0404-24   -40 to 105°C  2.0V to 5.5V*4
(6.5V)
Ext. adjustable
(180kHz to 1.4MHz)
1 PWM
(Step-up)
Ext. adjustable
(up to 20.0V)
+25mV/ -35mV 2A The charge pump operates at 1/4th operating frequency.
Soft Start Time Adjustable
Sequence Soft UVLO
Download
2.06MB
2 Charge pump
(Positive)
Ext. adjustable +35mV/ -50mV -
3 Charge pump
(Negative)
±35mV   -
Soft : Soft Start circuit   Thermal : Thermal Shutdown circuit   UVLO : Under Voltage Lockout circuit   OVLO : Over Voltage Lockout function
Sequence : Power on sequence controllable
  • *1When the output voltage is adjusted by external resistors, the value means the feedback voltage accuracy.
  • *2This is an approximate value, because output current depends on conditions and external parts.
  • *3Lx current limit is different from output current.
  • *4101A : 2.0V to 5.5V, 102A : 2.5V to 5.5V, 103A : 3.3V to 5.5V
[ Automotive Class ]
Ricoh provides three classes of automotive products corresponding to required quality level.
 

Automotive ICs

 
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