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RP402 Series
PWM/VFM Step-up DCDC Converter with Synchronous Rectifier

Product Specifications

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(PLP)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.

FEATURES

Input Voltage Range Fixed Output Voltage Type: 0.6 V to 4.8 V
Adjustable Output Voltage Type: 0.6 V to 4.6 V
Start-up Voltage Typ. 0.7 V
Output Voltage Range Fixed Output Voltage Type: 1.8 V to 5.5 V, 0.1 V step
Adjustable Output Voltage Type: 1.8 V to 5.5 V (recommended)
High 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)
Output Current 800 mA: VIN = 3.6 V, VOUT = 5.0 V
Lx Driver ON Resistance NMOS/ PMOS: 0.20 Ω (VOUT = 5.0 V, 25°C)
PWM Oscillator Frequency 1.2 MHz (Normal PWM), 1.0 MHz (Forced PWM)
OVLO Detector Threshold Typ. 5.1 V
OVP Detector Threshold Typ. 6.0 V
Lx Peak Current Limit Typ. 1.5 A
Latch Protection Delay Time Typ. 3.3 ms (RP402Kxx1x, RP402Nxx1x)
Typ. 4.1 ms (RP402Kxx2x)
Soft-start Time Typ. 0.5 ms
Functions EMI Suppression (Built-in Anti-ringing Switch) (RP402Kxx1x, RP402Nxx1x)
Voltage Regulation at VIN > VOUT
Zero Input Complete Shutdown at VIN = 0 V
Input-to-Output Bypass Shutdown Option at CE = L (RP402xxxxC/ D/ G/ H)
Ceramic Capacitor Capable
Packages DFN(PLP)2020-8, SOT-23-5

APPLICATION INFORMATION

RP402K/Nxxxx Typical Application
(Fixed Output Voltage Type)

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

RP402K00xx Typical Application
(Adjustable Output Voltage Type)

L: 2.2 µH, C1: 10 µF, C2: 10 µF x2

TYPICAL CHARACTERISTICS

RP402x501x / RP402K501x (VOUT=5.0V) Efficiency vs. Output current

PWM/VFM auto switching control

Fixed PWM control

PIN DESCRIPTION

DFN(PLP)2020-8

DFN(PLP)2020-82.0 mm × 2.0 mm
1 MODE
2 NC
3 GND
4 Lx
5 VOUT
6 VIN
7 NC/ VFB
8 CE

*) The tab is substrate level (GND).

SOT-23-5

SOT-23-52.9 mm × 2.8 mm
1 Lx
2 GND
3 CE
4 VIN
5 VOUT

RP402 Series for Consumer

APPLICATIONS

  • MP3 Players, PDA
  • Digital Still Cameras
  • LCD Bias Supplies
  • Portable Blood Pressure Meter
  • Wireless Handset
  • GPS
  • USB-OTG
  • HDMI

PRODUCT LONGEVITY PROGRAM

RP402 series operate PRODUCT LONGEVITY PROGRAM (ten-year supply is maintained as of January, 2016).
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.


SELECTION GUIDE

The package type, the set output voltage, the PWM control type, the shutdown option, the MODE pin option, and the latch function are user-selectable options.

Product Name   Package Quantity per Reel
RP402Kxx#$-TR ConsumterPLP DFN(PLP)2020-8 5,000
RP402Nxx#$-TR-FE ConsumterPLP SOT-23-5 3,000
  • xx … Specify the set output voltage (VSET).
    00: Adjustable Output Voltage Type (1.8 V to 5.5 V, recommended voltage range)
    xx: Fixed Output Voltage Type (1.8 V to 5.5 V, adjustable in 0.1 V step)
    Please note: SOT-23-5 package is only available with fixed output voltage type.
  • # … Specify the PWM control type.
    1: Normal PWM operation
    2: Forced PWM operation
  • $ … Specify the combination of the shutdown option, the MODE pin option and the latch function.
xx#$ Output Voltage Type Power Controlling Method Shutdown Option at CE = L Latch
Function
Package
xx1A Fixed Output Voltage Type "H": Normal PWM Control,
"L": PWM/VFM Auto Switching Control
Complete Output Disconnect Yes DFN(PLP) 2020-8
xx1B No
xx1C Input-to-Output Bypass Yes
xx1D No
xx2A "H": Forced PWM Control
Note: "H” recommended
Complete Output Disconnect Yes
xx2B No
001A Adjustable Output Voltage Type "H": Normal PWM Control,
"L": PWM/VFM Auto Switching Control
Complete Output Disconnect Yes DFN(PLP) 2020-8
001B No
001C Input-to-Output Bypass Yes
001D No
002A "H": Forced PWM Control
Note: "H” recommended
Complete Output Disconnect Yes
002B No
xx1E Fixed Output Voltage Type PWM/VFM Auto Switching Control Complete Output Disconnect Yes SOT-23-5
xx1F No
xx1G Input-to-Output Bypass Yes
xx1H No

DOCUMENT/CONTACT

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Technical Support

Package *1 Marking Reliability *2
DFN(PLP)2020-8 RP402K RP402K
SOT-23-5 RP402N RP402N (-FE)

*1: The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and land pattern (foot pattern).
*2: Reliability file includes a reliability test report and a reflow profile.

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