R1290 Series

Triple Output DC/DC Converter for LCD/CCD

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Description

The R1290 Series are triple output CMOS-based step-up/inverting DC/DC converters. R1290 consists of the inductor type PWM step-up DC/DC converter (DC/DC1) with an internal 2A Nch. driver and charge pump type positive/negative DC/DC converters (DC/DC2, DC/DC3). Triple output start-up sequence can be set by external capacitors. R1290 is ideally suitable for use in power source for equipment that requires sequence control such as LCD and CCD.

Spec

	Consumer	Automotive
Input Voltage Range	2.0 V to 5.5 V (6.5 V)
Operating Temperature Range	-40°C to 95°C (125°C)	-40°C to 105°C (125°C)
Supply Current	Typ. 3.5 mA
Standby Current	Typ. 0.1 µA
Output Voltage Range	Boost DC/DC: Max. 20 V (Externally Adjustable)
Feedback Voltage	1.0 V
Feedback Voltage Accuracy	±15 mV
Feedback Voltage Temperature Coefficient	Typ. ±150 ppm/°C
Driver ON-resistance	Typ. 150 mΩ
Oscillator Frequency	Externally Adjustable: 180 kHz to 1.4 MHz
Package	QFN0404-24
Charge-pump Output Voltage	Adjustable with external resistors
Charge-pump VREF/CPPFB Voltage Temperature Coefficient	VREF Voltage Temperature Coefficient: Typ. 150 ppm/°C CPPFB Voltage Temperature Coefficient: Typ. 150 ppm/°C
Charge-pump Oscillator Frequency	1/4 of the main step-up DC/DC converter oscillator frequency

Download Datasheet

TSD	ILX	OCP	OVP	UVLO	OVLO	Reverse	Shutdown	Soft Start	SSCG	PGOOD	Auto Discharge	Anti-ringing	Sequencing	Max Duty	Ext. Phase	LED Adjust

Functional Description

Quality &
Packages

Product Name	Compatibility	Package	Marking	Reliability
R1290K10xA-E2		QFN0404-24	R1290K	R1290K
R1290K10xA-E2-AE		QFN0404-24	R1290K	R1290K-AE

Refer to the datasheets for the details on the product.
The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

TSD	Thermal Shutdown Function
ILX	LX Current Limit Function
OCP	Overcurrent Protection
OVP	Overvoltage Protection
UVLO	Undervoltage Lockout Protection
OVLO	Overvoltage Lockout Protection
Reverse	Reverse Current Protection Circuit
Shutdown	Shutdown Function
Soft Start	Soft Start Function
SSCG	Spread Spectrum Clock Generator Function
PGOOD	Power Good Output
Auto Discharge	Auto Discharge Function
Anti-ringing	Anti-ringing Switch Function
Sequencing	Start-up Sequencing Control
Max Duty	Maximum Duty Cycle
Ext. Phase	Externally Adjustable Phase Compensation
LED Adjust	LED High-speed Dimming Control