IFX 80471SK V50 Infineon Technologies, IFX 80471SK V50 Datasheet - Page 3

• Manufacturer Part Number: IFX 80471SK V50
• Manufacturer: Infineon Technologies

Specifications of IFX 80471SK V50

• Packages: PG-DSO-14
• Comment: Vin up to 60V; external MOS; PG-DSO-14
• Vq (max): 5.0 V
• Iq (max): 2,300.0 mA
• Iq (typ): 130.0 µA
• Output: Buck Converter

Step-Down DC/DC Controller
1
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
•
1)
2)
For automotive and transportation applications, please refer to the Infineon TLE and TLF voltage regulator series.
Description
The IFX80471 step-down DC-DC switching controllers provide high efficiency over loads ranging from 1mA up to
2.3A. A unique PWM/PFM control scheme operates with a duty cycle up to 100% resulting in a very low dropout
voltage. This control scheme eliminates minimum load requirements and reduces the supply current under light
loads to 120µA, depending on dimensioning of external components. In addition the adjustable version
IFX80471SKV can be shut down via the Enable input reducing the input current to <2µA. The IFX80471 step-down
controllers drive an external P-channel MOSFET, allowing design flexibility for applications up to 11.5W of output
power at 5V output voltage. The IFX80471 offers high switching frequency of up to 360kHz as well as operation
in continuous-conduction mode and allows the usage of tiny surface-mount inductors. Output capacitor
requirements are also reduced, minimizing PC board area and system costs. The output voltage of the
IFX80471SKV50 is preset to 5V and is adjustable for the IFX80471SKV. The IFX80471SKV50 features a reset
function with a threshold between 4.5V and 4.8V, including a small hysteresis of typ. 50mV. Input voltages of both
IFX80471 versions can be up to 60V.
Type
IFX80471SKV
IFX80471SKV50
Data Sheet
dependent on external component
for the adjustable version IFX80471SKV the reset functionality is available for output voltages > 7V
Input voltage range from 5V up to 60V
Output voltage: 5V fixed or adjustable
Output voltage accuracy: 3%
Output current up to 2.3A
100% maximum duty cycle
Less than 120µA quiescent current at low loads
2µA max. shutdown current at device off (IFX80471SKV)
Fixed 360kHz switching frequency
Frequency synchronization input for external clocks
Current Mode control scheme
Integrated output undervoltage reset circuit
On chip low battery detector (on chip comparator)
Temperature range -40°C to 125 °C
Green Product (RoHS compliant)
Overview
Package
PG-DSO-14
PG-DSO-14
2)
1)
3
Marking
I80471V
I80471V50
PG-DSO-14
Rev. 1.0, 2011-02-07
IFX80471