ST1CC40 datasheet(1/37 Pages) STMICROELECTRONICS

部件名	ST1CC40

功能描述	3 A monolithic step-down current source with synchronous rectification

PDF	37 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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1 / 37 page

This is information on a product in full production.

June 2013

DocID18279 Rev 5

1/37

ST1CC40

3 A monolithic step-down current source with synchronous

rectification

Datasheet

- production data

Features

 3.0 V to 18 V operating input voltage range

 850 kHz fixed switching frequency

 100 mV typ. current sense voltage drop

 6 A standby current in inhibit mode



7% output current accuracy

 Synchronous rectification

 95 mHS / 69 m LS typical RDS(on)

 Peak current mode architecture

 Embedded compensation network

 Internal current limiting

 Ceramic output capacitor compliant

 Thermal shutdown

Applications

 Battery charger

 Signage

 Emergency lighting

 High brightness LED driving

 General lighting

Description

The ST1CC40 device is an 850 kHz fixed

switching frequency monolithic step-down DC-DC

converter designed to operate as precise

constant current source with an adjustable current

capability up to 3 A DC. The regulated output

current is set connecting a sensing resistor to the

feedback pin. The embedded synchronous

rectification and the 100 mV typical RSENSE

voltage drop enhance the efficiency performance.

The size of the overall application is minimized

thanks to the high switching frequency and

ceramic output capacitor compatibility. The device

is fully protected against thermal overheating,

overcurrent and output short-circuit. Inhibit mode

minimizes the current consumption in standby.

The ST1CC40 is available in VFQFPN8 4 mm x 4

mm 8-lead, and standard SO8 package.

VFQFPN8 4x4

Figure 1. Typical application circuit

www.st.com

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