FEATURES

• Up to 95 Efficiency

• 3 Total Regulation (Each Controller)

• 5.5 V to 30 V Input Voltage Range

• 3.3 V, 5 V, and 12 V Outputs

• 200 kHz Low-Noise Fixed Frequency Operation

• Precision 3.3 V Reference Output

• 30 mA Linear Regulator Output

• High Efficiency Pulse Skipping Mode Operation at

Light Load

• Only Three Inductors Required - No Transformer

• LITTLE FOOT® Optimized Output Drivers

• Internal Soft-Start

• Minimal External Control Components

• 28-Pin SSOP Package

DESCRIPTION

The Si9136 is a current-mode PWM and PSM converter

controller, with two synchronous buck converters (3.3 V and

5 V) and a flyback (non-isolated buck-boost) converter

(12 V). Designed for portable devices, it offers a total five

power outputs (three tightly regulated dc/dc converter

outputs, a precision 3.3 V reference and a 5 V LDO output).

It requires minimum external components and is capable of

achieving conversion efficiencies approaching 95 .

The Si9136 is available in a 28-pin SSOP package and

specified to operate over the extended commercial (0 °C to

90 °C) temperature range.