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R1282 Series
PWM Step-up/Step-down DCDC Controller

Product Specifications

The R1282 Series are low supply current dual output CMOS-based PWM step-up/step-down DC/DC controllers. R1282 includes a soft start circuit, an under-voltage lockout circuit (UVLO), and a latch type protection circuit. By simply using inductors, resistors, capacitors, power MOS, and diodes, as external components, a high-efficiency step-up/step-down DC/DC converter can be easily configured. The oscillator maximum duty cycle, phase compensation, and soft start time can be set with an external resistor and capacitor.

FEATURES

Input Voltage Range (Maximum Rating) 2.5 V to 5.5 V (6.5 V)
Supply Current Typ. 1.4 mA (VIN= 5.5 V, EXT at no load)
Step-up Feedback Voltage 1.0 V
Step-down Feedback Voltage 1.0 V
Feedback Voltage Accuracy ±1.5%
Reference Voltage Output 1.5 V (±1.5%)
Oscillator Frequency 700 kHz
UVLO Detect Voltage 2.2 V
Latch Type Protection Circuit Delay time for protection Typ. 100 ms
Package SON-10
Ceramic capacitors can be used 10 µF or more

APPLICATION INFORMATION

L1,L2: 6.8µH, C1=C2=10µF

TYPICAL CHARACTERISTICS

Efficiency vs. Output Current (Step-up)

Efficiency vs. Output Current (Step-down)

PIN DESCRIPTION

SON-10

SON-102.9 mm × 3.0 mm
1 EXT1
2 GND
3 AMPOUT1
4 DTC1
5 VFB1
6 VFB2
7 DTC2
8 VREFOUT
9 VIN
10 EXT2

*) The tab suspension leads on back side are substrate level (GND).


R1282 Series for Consumer

APPLICATIONS

  • Constant Voltage Power Source for Portable Equipment
  • Constant Voltage Power Source for LCD and CCD

SELECTION GUIDE

Product Name   Package Quantity per Reel
R1282D002A-TR-FE Consumter SON-10 3,000

DOCUMENT/CONTACT

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Package *1 Marking Reliability *2
SON-10 R1282D R1282D (-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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