R1210 Series

8V Input PWM Step-up DC/DC Converter

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Description

The R1210 Series are low supply current, CMOS-based PWM step-up DC/DC converters. By simply using an inductor, a diode, and a capacitor as external components, a high-efficiency step-up DC/DC converter can be easily configured. The xx1 version with an internal output transistor and the xx2 version with an external transistor are available. The oscillator frequency can be selected from 100kHz or 180kHz. The xx1A version is also available, which contains a basic frequency changeover circuit that switches the oscillator frequency from 100kHz to 35kHz when output load is reduced. R1210 also has a function that detects drastic changes in output voltage and reduces the amount of overshoot/undershoot by switching control mode.

Spec

	Consumer
Input Voltage Range	0.8 V to 8.0 V (9.0 V)
Operating Temperature Range	-40°C to 85°C (125°C)
Supply Current	Typ. 10 µA
Standby Current	Typ. 0.5 µA
Start-up Voltage	Max. 0.9 V (R1210Nxx1x) Max. 0.8 V (R1210Nxx2x)
Output Voltage Range	2.2 V to 3.5 V (0.1 V step) (R1210Nxx1A) 2.2 V to 6.0 V (0.1V step) (R1210NxxxC/D)
Output Voltage Accuracy	±2.5% (Ta = 25°C)
Output Voltage Temperature Coefficient	Typ. ±100 ppm/°C
Oscillator Frequency	100 kHz (R1210Nxx1A, R1210NxxxC) 180 kHz (R1210NxxxD)
Efficiency	Typ. 88% (VIN = Set Output Voltage ×0.6 [V], IOUT = 10 mA)
Package	SOT-23-5

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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
R1210Nxxxx-TR-FE		SOT-23-5	R1210N	R1210N-FE

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