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

Standard
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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Protections / Functions

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

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

Functional Description

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

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Boost
VIN
min (V)
0.6
VIN
max (V)
4.8
VOUT
min (V)
1.8
VOUT
max (V)
5.5
ISS
(µA)
21

Technical Documents

  • RP402Kxxxx Typical Application (Adjustable Output Voltage Type)

    RP402Kxxxx Typical Application (Adjustable Output Voltage Type)

    L: 2.2 µH, C1: 10 µF, C2: 10 µF x2

  • RP402K/Nxxxx Typical Application (Fixed Output Voltage Type)

    RP402K/Nxxxx Typical Application (Fixed Output Voltage Type)

    *) MODE pin : only RP402Kxxxx.
    L: 2.2 µH, C1: 10 µF, C2: 10 µF x2

  • RP402x501x / RP402K501x (VOUT=5.0V) Efficiency vs. Output Current: Fixed PWM control

    RP402x501x / RP402K501x (VOUT=5.0V) Efficiency vs. Output Current: Fixed PWM control

  • RP402x501x / RP402K501x (VOUT=5.0V) Efficiency vs. Output Current: PWM/VFM auto switching control

    RP402x501x / RP402K501x (VOUT=5.0V) Efficiency vs. Output Current: PWM/VFM auto switching control

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Quality & Packages

  • 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.

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