IFX 91041EJV Infineon Technologies, IFX 91041EJV Datasheet - Page 11

• Manufacturer Part Number: IFX 91041EJV
• Manufacturer: Infineon Technologies

Specifications of IFX 91041EJV

• Packages: PG-DSO-8
• Comment: VQ adjustable from 0.6V up to 16V; Tolerance 2% up to 1000mA; DSO-8 EP
• Vq (max): adjustable
• Iq (max): 1,800.0 mA
• Iq (typ): 7,000.0 µA
• Output: Buck Converter

7
7.1
The oscillator turns on the power switch with a constant frequency while the buck regulating circuit turns the power
transistor off in every cycle with an appropriate time gap depending on the output and input voltage.
The internal sawtooth signal used for the PWM generation has an amplitude proportional to the input supply
voltage (feedforward).
The turn-on frequency can optionally be set externally via the ’SYNC’ pin using a TTL compatible input signal. In
this case the synchronization of the PWM-on signal refers to the falling edge of the ’SYNC’-pin input signal. In case
the synchronization to an external clock signal is not needed the ’SYNC’ pin should be connected to GND.
Leaving pin SYNC open or short-circuiting it to GND leads to normal operation with the internal switching
frequency.
7.2
Electrical Characteristics: Buck Regulator
V
Pos.
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
1) Synchronization of PWM-on signal to falling edge.
Data Sheet
S
= 6.0 V to 40 V,
Parameter
Oscillator frequency
Synchronization capture range
SYNC signal high level valid
SYNC signal low level valid
SYNC input internal pull-down
Module Oscillator
Description
Electrical Characteristics Module Oscillator
T
j
= -40 °C to +125°C, all voltages with respect to ground (unless otherwise specified)
Symbol
f
f
V
V
R
osc
sync
SYNC,hi
SYNC,lo
SYNC
11
Min.
330
200
2.9
0.60
Limit Values
Typ.
370
1.0
Max.
420
530
0.8
1.4
Unit
kHz
kHz
V
V
MΩ
Rev. 1.1, 2011-07-08
Conditions
V
1)
1)
V
Module Oscillator
SYNC
SYNC
= 0V
= 5V
IFX91041