Features

• Input voltage range VIN from 2.4 V to 5.5 V

• Constant on time (COT) Control for fast

transient

• PFM/PWM mode or forced PWM mode

operation

• 1% Vout accuracy

• Output current up to 3A

• Power good output

• 4MHz switching frequency

• Overcurrent and short circuit protection

• Output discharge function

• Small size 2.0 x 2.5 x 1.1 mm LGA package

Applications

• Optical modules

• Smart phones

• Wearable electronics

• Camera modules

• Industrial IoT (smart sensors) / NB-IoT

Description

The RSM3203/04/05 are a family of small size, high

efficiency step-down power module optimized for

high density application. The device can operate at

switching frequency up to 4MHz to reduce the size

of external components.

The device has trim option of PFM/PWM mode or

forced PWM mode. 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 via trim,

the device requires a minimum number of external

components for output voltage setting.

The input voltage of RSM3203/04/05 is from 2.4V to

5.5V. The output current is up to 3A.

RSM3203/04/05 are available in a 2.0mm x 2.5 mm,

10-pin LGA package.