R1283 Series

PWM Step-up/Inverting DC/DC Converter for CCD/LCD

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Description

The R1283 Series are dual output CMOS-based PWM step-up/inverting DC/DC converters. R1283 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch protection circuit. By simply using inductors, resistors, capacitors, and diodes as external components, a high-efficiency step-up/inverting DC/DC converter can be easily configured.

R1283 has internal 400mΩ ON resistance transistors for both step-up and inverting. Start-up sequence of two DC/DC converters can be selected. Since the shutdown sequence can also be set by the auto-discharge function of the inverting DC/DC converter, the products are ideally suitable for applications that require setting of power supply start-up/shutdown sequence for CCD, LCD, and OLED.

Spec

	Consumer
Input Voltage Range	2.5 V to 5.5 V (6.5 V)
Operating Temperature Range	-40°C to 85°C (125°C)
Supply Current	Typ. 2 mA
Standby Current	Typ. 0.1 µA
Output Voltage Range	Boost: Max. 20 V (Externally Adjustable) Inverting: VCC-20 V(Externally Adjustable)
Output Voltage Accuracy	±1.5% (Ta = 25°C)
Driver ON-resistance	Boost Nch driver: Typ. 400 mΩ Inverting Pch driver: Typ. 400 mΩ
Oscillator Frequency	Typ. 300 kHz, 700 kHz, 1.4 MHz
Maximum Duty Cycle	Typ. 91%
Package	DFN(PL)2730-12

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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
R1283K00xx-TR		DFN(PL)2730-12	See datasheet	R1283K

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