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STOD2540

PMOLED display power supply

STMicroelectronics 

STOD2540

PMOLED display power supply

Features

■ Inductor switches boost controller

■ PFM mode control

■ High efficiency over wide range of load (1 mA

to 40 mA)

■ Integrated load disconnect switch

■ Over voltage protection with automatic restart

■ Soft start with adjustable peak current limit

■ Enable pin

■ Low shutdown current

■ Small external inductor

■ Supply voltage from 3.0 V to 5.5 V

Application

■ PMOLED display driver

Description

STOD2540 is dedicated to passive matrix OLED

(PMOLED) displays for portable handsets and

provides the pre-charge and biasing voltage of

the column matrix driver as shown in figure 3. The

current capability of STOD2540 allows feeding a

1", 1.3" or 1.5" color PMOLED. STOD2540 is a

boost converter that operates from 3.0 V to 5.5 V

and can provide an output voltage as high as 25

V. The output current capability is maximum 40

mA up to 25 V output voltage. The regulation is

performed by a resistor divider network (figure 3)

that detects the output voltage.

QFN8 (3 x 3 mm)

In this state-of-the-art boost converter, a DC

current path exists between the battery source

and the load. In order to reduce the consumption

in shutdown mode, a high-side load isolation

switch is necessary to cut this DC current path in

standby mode. The load disconnect switch (LDS)

act as an isolation switch in shutdown mode.

Table 1.

Device summary

Order code

STOD2540PUR

July 2010

Package

QFN8 (3 x 3 mm)

Doc ID 12204 Rev 10

Packaging

3000 parts per reel

1/20

www.st.com

20

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