TLE6389-2GV Infineon Technologies, TLE6389-2GV Datasheet - Page 30

• Manufacturer Part Number: TLE6389-2GV
• Description: IC CONV DC/DC STP-DWN DSO-14
• Manufacturer: Infineon Technologies
• Type: Step-Down (Buck)r

Specifications of TLE6389-2GV

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 7 ~ 15 V
• Current - Output: 2.3A
• Frequency - Switching: 360kHz
• Voltage - Input: 5 ~ 60 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: DSO-14
• Output Voltage: 5 V, 7 V to 15 V
• Output Current: 2.3 A
• Input Voltage: 5 V to 60 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 150 C
• Minimum Operating Temperature: - 40 C
• For Use With: DEMOBOARDTLE6389-3GV50IN - BOARD DEMO FOR TLE 6389-3 GV50DEMOBOARDTLE6389-2GVIN - BOARD DEMO FOR TLE 6389-2GVDEMOBOARDTLE6389-2GV50IN - BOARD DEMO FOR TLE 6389-2 GV50
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: SP000226821

Datasheet Rev. 2.1
Figure 4
7.7
The TLE 6389 operates with a duty cycle up to 100%. This feature allows to operate with
the lowest possible drop voltage at low battery voltage as it occurs at cold cranking. The
MOSFET is turned on continuously when the supply voltage approaches the output
voltage level, conventional switching regulators with less than 100% duty cycle would fail
in that case.
The drop- or dropout voltage is defined as the difference between the input and output
voltage levels when the input is low enough to drop the output out of regulation. Dropout
depends on the MOSFET drain-to-source on-resistance, the current-sense resistor and
the inductor series resistance. It is proportional to the load current:
V
V
V
V
IN
VOUT
FB
RO
Reset timing
100% duty-cycle operation and dropout
V
t
rd
drop
=
shutdown
thermal
t
rr
I
LOAD
R
t
rd
DS ON PMOS
voltage
under
30
+
R
t
< t
rd
SENSE
rr
+
R
INDUCTANCE
over
load
t
rd
TLE 6389
V
V
2007-08-13
VOUT, RT
FB,RT
t
t
t