A5974DTR STMicroelectronics, A5974DTR Datasheet - Page 20

• Manufacturer Part Number: A5974DTR
• Description: IC BUCK ADJ 2.5A 8SOIC
• Manufacturer: STMicroelectronics
• Series: -r
• Type: Step-Down (Buck)r

Specifications of A5974DTR

• Internal Switch(s): -
• Synchronous Rectifier: -
• Number Of Outputs: -
• Voltage - Output: 1.235 V ~ 35 V
• Current - Output: 2.5A
• Frequency - Switching: 250kHz
• Voltage - Input: 4 V ~ 36 V
• Operating Temperature: -
• Mounting Type: *
• Package / Case: *
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11424-2

reduce logic pins on the package and to save PCB traces on the board.
STCF05
The STCF05 is a high-efficiency power supply solution to drive multiple flash LEDs
in camera phones, PDAs and other handheld devices.
The synchronous boost topology with output current control guarantees the
correct LED current over all possible conditions of battery level and LED forward
voltage.
All the functions of the device are controlled through the I
Key features
Q
Q
Q
Q
Q
Q
Q
Application example
20
STEVAL-TLL007V1
Q
Q
Q
Q
Q
Q
Q
1.8 MHz fixed frequency PWM control
Efficiency up to 92%
Full I
LED over-temperature detection and protection with external NTC resistor
Open and shorted LED failure detection and protection
Chip over-temperature detection and protection
Less than 1 μA standby current
Sales code
2
C control
Microprocessor
AUX LED
V I
A/D converter
To optional
(red)
I/Os
bus
I ² C
Board
V I
Power flash demo board based on STCF05 (includes motherboard based on
µPSD)
AUXL
TRIG
ATN
TMSK
SLC
SDA
GATE
ADD
PGND
PGND
2
C bus that allows to
STCF05
PGND
Description
RX
Rx
NTC
NTC
AGND
VOUT
LED
Key benefits
Q
Q
V ref
Only a few external components
required
Power
white
LEDs
AN2827: Driver for double flash LED with
I
2
C interface
Technical documents
(3 x 3 mm)
TFBGA25