SKY87203

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

Please note: SKY87203 is being discontinued and is not recommended for new designs.

The SKY87203 is a variable switching frequency, 3.5 A constant on-time, synchronous step-down converter. The device provides an output voltage from 0.9 V to 4.0 V from input voltage ranging from 2.7 V to 6.0 V, while keeping excellent line and load regulation and maximizing 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 SKY87203 has cycle-by-cycle current limits and thermal shutdown to protect against fault conditions. The SKY87203 is available in a 12-pin, 2 mm x 2 mm Quad Flat No-Lead (QFN) package.

Data Sheets

Talk to Sales ECAD Model

Specifications

Product LifecycleObsolete

Min. V_IN (V)2.7

Max. V_IN (V)6.0

Min. V_OUT (V)0.6

Max. V_OUT (V)3.3

I_OUT (mA)3500

f_OSC (kHz)1200

Typ. I_Q (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
Output voltage range: 0.9 V to 4.0 V
Variable switching frequency: 600 kHz to 1.5 MHz
Up to 3.5 A continuous output current
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
Auto-discharge at power-off
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, 260ºC per JEDEC J-STD-020)

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