SKY87222

Dual Step-Down DC-DC Converter

The SKY87222 is a dual, 1.2 MHz, Constant On-time synchronous step-down DC-DC converter. The SKY87222 provides a fixed output voltage of 1.8 V and an adjustable output voltage from 0.6 V to 3.3 V from input voltage ranging from 2.7 V to 5.0 V. The SKY87222 provides excellent line and load regulation along with high light load efficiency.

The Constant On-time control allows for easy loop stabilization with minimal external components while providing fast transient response.

Power sequencing is available via EN pins along with a Power Good pin.

The SKY87222 has cycle-by-cycle current limit and thermal shutdown to protect against fault conditions. The SKY87222 is available in a Pb-free, low-profile, 17-pin 2.0 mm x 2.5 mm Quad Flat No-Lead (QFN) package, and rated over the -40 ºC to 85 ºC temperature range.

Please note: SKY87222-11-653LF is being discontinued and is not recommended for new designs.

Data Sheets

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Specifications

Min. V_IN (V)2.8

Max. V_IN (V)5.0

Min. V_OUT (V)0.6

Max. V_OUT (V)1.8(Vout1), 3.3(Vout2)

I_OUT (mA)500/1500

f_OSC (kHz)1200

Typ. I_Q (μA)80

PackageQFN,17L

Package (mm)?2.0 x 2.5 x 0.55

Features

VIN range: 2.7 V to 5.0 V
OUT1: fixed 1.8 V at 500 m
OUT2: adjustable from 0.6 V to 3.3 V at 1.5 A
1.2 MHz switching frequency
92% peak efficiency (OUT1)
80% light load efficiency
EN and Power Good for power sequencing
Cycle-by-cycle over-current protection
Over-temperature protection
Control loop stabilization with low ESR ceramic capacitors
Internal soft start
-40 ºC to 85 ºC operating temperature range.
Low profile QFN (17-pin, 2.0 mm x 2.5 mm) package (MSL1, 260 ºC per JEDEC J-STD-020)

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