IFX 80471SK V50 Infineon Technologies, IFX 80471SK V50 Datasheet - Page 6

• 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

Pin
4
5
6
7
8
9
10
11
12
13
14
Data Sheet
Symbol
GND
SYNC
SI_GND
SI
COMP
SO
RO
BDS
GDRV
VS
CS
Function
Ground connection. Analog signal ground.
Input for external frequency synchronization.
An external clock signal connected to this pin allows switching frequency
synchronization of the device. The internal oscillator is clocked then by the
frequency applied at the SYNC input.
SI-Ground input.
Ground connection for SI comparator resistor divider. Depending on SI_ENABLE
this input is switched to high impedance or low ohmic to GND.
Sense comparator input.
Input of the low-battery comparator. This input is compared to an internal 1.25V
reference where SO gives the result of the comparison. Can be used for any
comparison, not necessarily as battery sense.
Compensation input.
Connect via RC-compensation network to GND.
Sense comparator output.
Open drain output from SI comparator at the adjustable version (IFX80471SKV),
Pull down structure with an internal 20kΩ pull up resistor to VOUT at the 5V version
(IFX80471SKV50).
Reset output.
Open drain output from undervoltage reset comparator at the adjustable version
(IFX80471SKV),
Pull down structure with an internal 20kΩ pull up resistor to VOUT at the 5V version
(IFX80471SKV50).
Buck driver supply input.
Connect a ceramic capacitor between BDS and VS to generate clamped gate-
source voltage to supply the driver of the PMOS power stage.
Gate drive output.
Connect to the gate of the external P-Channel MOSFET. The voltage at GDRV
swings between the levels of VS and BDS.
Device supply input.
Connect a 220nF ceramic cap close to the pin in addition to the low ESR tantalum
input capacitance.
Current-sense input.
Connect current-sense resistor between VS and CS. The voltage drop over the
sense-resistor determines the peak current flowing in the buck circuit. The external
MOSFET is turned off when the peak current is exceeded.
6
Rev. 1.0, 2011-02-07
Pin Configuration
IFX80471