R1285L221A-TR datasheet, PDF - EEWORLD Datasheet

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R1285L221A-TR: DescriptionSwitching Regulator, 1.9A, 1600kHz Switching Freq-Max, PDSO12, 2.70 X 3 MM, HALOGEN AND LEAD FREE, DFN-12; CategoryPower/power management The power supply circuit; ManufacturerRICOH Electronic Devices Co., Ltd.; Environmental Compliance

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R1285L221A-TR Overview

Switching Regulator, 1.9A, 1600kHz Switching Freq-Max, PDSO12, 2.70 X 3 MM, HALOGEN AND LEAD FREE, DFN-12

R1285L221A-TR Parametric

Parameter Name	Attribute value
Is it Rohs certified?	conform to
Objectid	1190720456
Parts packaging code	DFN
package instruction	HVSON,
Contacts	12
Reach Compliance Code	unknown
ECCN code	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR
Control Technology	PULSE WIDTH MODULATION
Maximum input voltage	4.8 V
Minimum input voltage	2.3 V
Nominal input voltage	3.7 V
JESD-30 code	R-PDSO-N12
length	3 mm
Number of functions	1
Number of terminals	12
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Maximum output current	1.9 A
Nominal output voltage	4.6 V
Package body material	PLASTIC/EPOXY
encapsulated code	HVSON
Package shape	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Maximum seat height	0.6 mm
surface mount	YES
Switch configuration	BOOST
Maximum switching frequency	1600 kHz
Temperature level	INDUSTRIAL
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED
width	2.7 mm

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R1285L series

2ch DCDC for OLED

NO.EA-208-130509

OUTLINE

The R1285L 2ch DC/DC converter is designed for OLED Display power source. It contains a step up DC/DC

converter and an inverting DC/DC converter to generate two required voltages by OLED Display.

Step up DC/DC converter generates boosted output voltage to 4.6V ~ 5.0V. Inverting DC/DC converter generates

negative voltage –2.0V ~ -6.0V independently. Each of the R1285 series consists of an oscillator, a PWM control

circuit, a voltage reference, error amplifiers, over current protection circuits, short protection circuits, an under

voltage lockout circuit (UVLO), a complete shutdown switch and an Nch driver for boost operation, a Pch driver for

inverting. A high efficiency boost and inverting DC/DC converter can be composed with external inductors, diodes,

capacitors and resistors. Start up sequence is internally made.

FEATURES

Operating Voltage • • • • • 2.3V ~ 4.8V

Step Up DC/DC (CH1)

Internal Pch MOSFET for complete shutdown (Ron=300mΩTyp.)

Internal Nch MOSFET Driver (Ron=300mΩTyp.)

Output Voltage (V

OUTP

) • • • • • 4.6V ~ 5.0V (0.2VStep)

Auto Discharge function for positive output

Internal Soft start function (Typ. 4.5ms)

Over Current Protection

Maximum Duty Cycle: 85%(Typ.)

Inverting DC/DC (CH2)

Internal Pch MOSFET Driver (Ron=600mΩ Typ.)

Output Voltage (V

OUTN

) • • • • • -2V ~ -6V (0.1VStep)

Adjustable Vout Up to -6V with external resistors

Auto Discharge function for negative output

Internal Soft start function (Typ. 4.5ms)

Over Current Protection

Maximum Duty Cycle: 90%(Typ.)

Control

Short Protection with timer latch function (Typ. 50ms)

Short condition for either or both two outputs makes all output drivers off and latches. If the

maximum duty cycle continues for a certain time, these output drivers will be turned off. This

function prevents irregular current from overheating the R1285 .

CE with start up sequence function ( CH1→CH2 )

UVLO function.

Operating Frequency • • • • • 1400kHz

Small package • • • • • DFN2730-12

[ R1285LxxxA ]

[ R1285L00xB ]

APPLICATION

Fixed voltage power supply for portable equipment

Fixed voltage power supply for OLED

V 1.4

R1285L221A-TR Related Products

	R1285L221A-TR	R1285L003B-TR	R1285L401A-TR
Description	Switching Regulator, 1.9A, 1600kHz Switching Freq-Max, PDSO12, 2.70 X 3 MM, HALOGEN AND LEAD FREE, DFN-12	Switching Regulator, 1.9A, 1600kHz Switching Freq-Max, PDSO12, 2.70 X 3 MM, HALOGEN AND LEAD FREE, DFN-12	Switching Regulator, 1.9A, 1600kHz Switching Freq-Max, PDSO12, 2.70 X 3 MM, HALOGEN AND LEAD FREE, DFN-12
Is it Rohs certified?	conform to	conform to	conform to
Objectid	1190720456	1190720449	1190720510
Parts packaging code	DFN	DFN	DFN
package instruction	HVSON,	HVSON,	HVSON,
Contacts	12	12	12
Reach Compliance Code	unknown	unknown	unknown
ECCN code	EAR99	EAR99	EAR99
Analog Integrated Circuits - Other Types	SWITCHING REGULATOR	SWITCHING REGULATOR	SWITCHING REGULATOR
Control Technology	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION	PULSE WIDTH MODULATION
Maximum input voltage	4.8 V	4.8 V	4.8 V
Minimum input voltage	2.3 V	2.3 V	2.3 V
Nominal input voltage	3.7 V	3.7 V	3.7 V
JESD-30 code	R-PDSO-N12	R-PDSO-N12	R-PDSO-N12
length	3 mm	3 mm	3 mm
Number of functions	1	1	1
Number of terminals	12	12	12
Maximum operating temperature	85 °C	85 °C	85 °C
Minimum operating temperature	-40 °C	-40 °C	-40 °C
Maximum output current	1.9 A	1.9 A	1.9 A
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	HVSON	HVSON	HVSON
Package shape	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE	SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
Maximum seat height	0.6 mm	0.6 mm	0.6 mm
surface mount	YES	YES	YES
Switch configuration	BOOST	BOOST	BOOST
Maximum switching frequency	1600 kHz	1600 kHz	1600 kHz
Temperature level	INDUSTRIAL	INDUSTRIAL	INDUSTRIAL
Terminal form	NO LEAD	NO LEAD	NO LEAD
Terminal pitch	0.5 mm	0.5 mm	0.5 mm
Terminal location	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
width	2.7 mm	2.7 mm	2.7 mm
Nominal output voltage	4.6 V	-	4.6 V

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