SKY87202

3.5 A Constant On-Time, Step-Down DC-DC Converter

The SKY87202 is a 1.2 MHz, 3.5 A constant on-time, synchronous step-down DC-DC converter. The device provides an output voltage from 0.6 V to 3.3 V from input voltage ranging from 2.7 V to 6.0 V, while keeping excellent line and load regulation and maximizing input efficiency.

The constant on-time control allows easy loop stabilization with minimal external components while providing fast transient response.

Power sequencing is controlled by the EN and PG pins.

The SKY87202 has cycle-by-cycle current limits and thermal shutdown to protect against fault conditions.

The SKY87202 is available in a 12-pin, 2 mm  2 mm Quad Flat No-Lead (QFN) package.

Please note: SKY87202-11-631LF is being discontinued and is not recommended for new designs.

Product Summary
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Specifications

Product LifecycleObsolete
Min. VIN (V)2.7
Max. VIN (V)6.0
Min. VOUT (V)0.6
Max. VOUT (V)3.3
IOUT (mA)3500
fOSC (kHz)1200
Typ. IQ (μA)40
PackageQFN, 12L
Package (mm)2.0 x 2.0 x 0.85

Features

  • Input voltage range: 2.7 V to 6.0 V
  • Two output voltage options:
    • Adjustable output voltage: 0.6 V to 3.3 V (SKY87202-11)
    • Fixed output voltage: 1.2 V (SKY87202-12)
  • Up to 3.5 A continuous output current
  • Switching frequency: 1.2 MHz
  • 95% peak efficiency
  • Typical switch on resistance: 50 mω PMOS, 40 mω NMOS
  • 80% light load efficiency
  • Power sequencing
  • Cycle-by-cycle over-current protection
  • Over-temperature protection
  • Control loop stabilization with low ESR ceramic capacitors
  • Soft start
  • Low profile, QFN (12-pin, 2 mm x 2 mm) package (MSL1, 260°C per JEDEC-J-STD-020) with exposed pad

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