Features
• Input voltage range VIN from 2.4 V to 5.5V
• Constant on time (COT) Control for fast
transient
• DCM mode operation
• 1% Vout accuracy
• Output current up to 3A
• Power good output
• 4MHz switching frequency
• Overcurrent and short circuit protection
• Low Rcson: 26 mΩ for both high side and low
side
• Output discharge function
• Small 1.2 x 0.8mm WLCSP package
Applications
• Optical modules
• Smart phones
• Wearable electronics
• Camera modules
• Industrial IoT (smart sensors) / NB-IoT
Description
The RS53203/04/05 are a family of small size, high
efficiency step-down converters optimized for high
density application. The device can operate at
switching frequency up to 4MHz to reduce the size
of external components.
The device employes PFM/PWM mode operation.
At PFM/PWM mode, the device transits between
PFM and PWM mode automatically to save power
at light load condition. At forced PWM mode, the
device operates at 4MHz switching frequency.
With 4 selectable output voltage options, the device
requires minimum number of external components
for output voltage setting.
The input voltage of RS53203/04/05 is from 2.4V to
5.5V. The output current is up to 3A.
RS53203/04/05 are available in a 0.8mm x 1.2 mm,
6-pin WLCSP package.