Product parameters

Funtion：PFM Step-Up DC-DC Controller IC

Opration Mode：PFM BOOST

Vout Range：9V

Vin Range：2.7V-5.5V

Operating Current：32uA@5V

Chip Temperature Regulation：No

Package：SOT23-6

Max Output Power：35W

Chip Enable：Yes

On-chip Power MOSFET：No

General Description

The CN5309 is a simple, compact PFM boost controller designed for applications where extremely low cost and small size are top priorities. The output voltage is fixed at 9V with 1% accuracy from an input voltage range of +2.7V to +6.5V.

Low current consumption of 32uA typical makes CN5309 ideal for battery-powered applications.

The CN5309 is designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for consumer electronics applications.

The CN5309 adopts PFM operating mode, which provides excellent efficiency over a wide-range of input voltage and load currents. The on-time and off-time are tuned to permit optimization of external component size.

Chip enable input can make CN5309 into ultra-low-current shutdown mode.

The CN5309 is available in a space-saving 6-pin SOT23 package.

 

Applications

l  Hand-held Devices

l  LCD Bias

l  Medical Equipment

l  Charger

Features

l  Operating voltage range：2.7V to 6.5V

l  Low Operating Current: 32uA@5V

l  Fixed Output Voltage of 9V

l  High Output voltage accuracy：±1%

l  No Feedback Resistor needed

l  Output Voltage can be adjusted upwards with External Resistor

l  Output Power: up to 40W

l  High Efficiency: up to 94%

l  Chip Enable Input

l  Operating Temperature Range

      -40°C to +85°C

l  Available in SOT23-6

l  Pb-free, rohs-Compliant and Halogen-free