R1224N412H 查看數據表（PDF） - RICOH Co.,Ltd.

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R1224N412H

PWM/VFM step-down DC/DC Converter

RICOH Co.,Ltd. 

TYPICAL APPLICATION AND APPLICATION HINTS

(1) Fixed Output Voltage Type (R1224Nxx2E/F/G/H/L/M except xx=10)

L

PMOS

C1

R1

5 VIN

4

EXT

VOUT 3

R1224N

1 CE

C2

GND

2

SD

C3

LOAD

R1224N

CE CONTROL

PMOS: HAT1044M (Hitachi)

SD1 : RB063L-30 (Rohm)

C1 : 10µF (Ceramic Type)

R1 : 10Ω

L : CR105-270MC (Sumida, 27µH)

C3 : 47µF (Tantalum Type)

C2 : 0.1µF (Ceramic Type)

(2) Adjustable Output Type (R1224N102G/H/M) Example: Output Voltage=3.2V

L

C1

R1

5 VIN

PMOS

4

EXT

VFB 3

C4

R4

R3

R1224N

1 CE

C2

GND

2

SD R2

C3

LOAD

CE CONTROL

PMOS: HAT1044M (Hitachi) L : CR105-270MC (Sumida, 27µH)

SD1 : RB063L-30 (Rohm)

C3 : 47µF (Tantalum Type)

C1 : 10µF (Ceramic Type) C2 : 0.1µF (Ceramic Type) C4: 1000pF (Ceramic Type)

R1 : 10Ω, R2=22kΩ, R3=2.7kΩ, R4=33kΩ

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