RP108J081D-T1-FE datasheet(2/28 Pages) RICOH

Part #	RP108J081D-T1-FE

Description	Output Current Min. 3A

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Manufacturer	RICOH [RICOH electronics devices division]

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RP108J

NO.EA-203-150817

2

BLOCK DIAGRAMS

RP108Jxx1B/E

RP108Jxx1D/F

VDD

GND

VOUT

CE

Vref

Current Limit

Thermal Shutdown

VFB

Reverse Detecter

VDD

GND

VOUT

CE

Vref

Current Limit

Thermal Shutdown

VFB

Reverse Detecter

SELECTION GUIDE

The output voltage, auto discharge function, and the soft-start time for the ICs can be selected at the user’s

request.

Product Name

Package

Quantity per Reel

Pb Free

Halogen Free

RP108Jxx1

∗(y) -T1-FE

TO-252-5-P2

3,000 pcs

Yes

xx: The set output voltage (VSET) can be designated in the range of 0.8V(08) to 4.2V(42) in 0.1V steps.

y: If the output voltage includes the 3rd digit, indicate the digit of 0.01V.

(1.25V, 1.85V, 2.85V)

Ex. If the output voltage is 1.25V, RP108J121

∗5-T1-FE.

If the output voltage is 1.85V, RP108J181

∗5-T1-FE.

If the output voltage is 2.85V, RP108J281

∗5-T1-FE.

∗: Designation of auto-discharge function at off state and the soft-start time

(B) No auto-discharge function

, soft start time typ. 180 μs

(D) Auto-discharge function

, soft start time typ. 180 μs

(E) No auto-discharge function

, soft start time typ. 570 μs

(F) Auto-discharge function

, soft start time typ. 570 μs

.

Auto-discharge function quickly lowers the output voltage to 0V, when the chip enable signal is switched from the active

mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor.

Refer to CONSTANT SLOPE CIRCUIT for detailed information on the difference of soft-start time and its effect.

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RP108J081D-T1-FE Datasheet(PDF) 2 Page - RICOH electronics devices division

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