RP402 Series

PWM/VFM Step-up DC/DC Converter with Synchronous Rectifier

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Description

The RP402 Series are min. 0.6V input, CMOS-based PWM/VFM step-up DC/DC converters with synchronous rectifier. The RP402 have three switching control types, or PWM control, forced PWM control, and PWM/VFM auto change control. The RP402 includes a soft start circuit, a bypass switch, shutdown switch, an anti-ringing switch. By simply using with an inductor, a capacitor, and resistors (for output voltage adjustable type) as external components, a high-efficiency step-up DC/DC converter can be realized.

The output voltage can be selected from the internally fixed type or externally adjustment is possible. In addition to SOT-23-5 package, a 2.0mm square DFN(PL)2020-8 package is available. The RP402 are ideal for the applications powered by one-cell or two-cell alkaline, nickel-metal-hydride (NiMH) or one-cell Lithium-ion (Li+) batteries.

Spec

	Consumer
Input Voltage Range	Internally Fixed Ver.: 0.6 V to 4.8 V Externally Adjustable Ver: 0.6 V to 4.6 V
Operating Temperature Range	-40°C to 85°C (125°C)
Supply Current	Typ. 21 µA
Standby Current	Typ. 0.2 µA
Start-up Voltage	Typ. 0.7 V
Output Voltage Range	1.8 V to 5.5 V Internally Fixed Ver.(Except RP402K00xx): 0.1 V step Externally Adjustable (RP402K00xx)
Output Voltage Accuracy	±1.5%
Feedback Voltage	1.0 V
Feedback Voltage Accuracy	±15 mV
Output Current	800 mA (VIN = 3.6 V, VOUT = 5.0 V)
Driver ON-resistance	NMOS/ PMOS: 0.20 Ω (VOUT = 5.0 V, 25°C)
Oscillator Frequency	1.2 MHz (Normal PWM Type), 1.0 MHz (Forced PWM Type)
Efficiency	94% (100 mA/ 5.0 V, VIN = 3.6 V, 25°C) 90% (1 mA/ 5.0 V, VIN = 3.6 V, 25°C)
Package	DFN(PL)2020-8, 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
RP402Kxxxx-TR		DFN(PL)2020-8	RP402K	RP402K
RP402Nxxxx-TR-FE		SOT-23-5	RP402N	RP402N-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