ST1CC40 Datasheet, PDF (1/37 Pages) STMicroelectronics – 3 A monolithic step-down current source with synchronous rectification

ST1CC40
3 A monolithic step-down current source with synchronous
rectification
Datasheet - production data
VFQFPN8 4x4
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 R_DS(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 R_SENSE
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.
Figure 1. Typical application circuit
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June 2013
This is information on a product in full production.
DocID18279 Rev 5
1/37
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